[PATCH RFC v7 6/6] drm/sprd: add Unisoc's drm mipi dsi&dphy driver

Adds dsi host controller support for the Unisoc's display subsystem. Adds dsi phy support for the Unisoc's display subsystem. Only MIPI DSI Displays supported, DP/TV/HMDI will be support in the feature.

Cc: Orson Zhai orsonzhai@gmail.com Cc: Chunyan Zhang zhang.lyra@gmail.com Signed-off-by: Kevin Tang kevin3.tang@gmail.com --- drivers/gpu/drm/sprd/Makefile | 9 +- drivers/gpu/drm/sprd/dw_dsi_ctrl.c | 792 +++++++++++++++++ drivers/gpu/drm/sprd/dw_dsi_ctrl.h | 1475 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c | 276 ++++++ drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h | 34 + drivers/gpu/drm/sprd/megacores_pll.c | 315 +++++++ drivers/gpu/drm/sprd/megacores_pll.h | 146 ++++ drivers/gpu/drm/sprd/sprd_dphy.c | 335 ++++++++ drivers/gpu/drm/sprd/sprd_dphy.h | 39 + drivers/gpu/drm/sprd/sprd_dpu.c | 22 + drivers/gpu/drm/sprd/sprd_dpu.h | 3 + drivers/gpu/drm/sprd/sprd_drm.c | 40 + drivers/gpu/drm/sprd/sprd_drm.h | 2 + drivers/gpu/drm/sprd/sprd_dsi.c | 1102 ++++++++++++++++++++++++ drivers/gpu/drm/sprd/sprd_dsi.h | 105 +++ 15 files changed, 4693 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h

diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile index 0ba48f2..75d6a519 100644 --- a/drivers/gpu/drm/sprd/Makefile +++ b/drivers/gpu/drm/sprd/Makefile @@ -1,7 +1,12 @@ # SPDX-License-Identifier: GPL-2.0

obj-y := sprd_drm.o \ - sprd_dpu.o + sprd_dpu.o \ + sprd_dsi.o \ + sprd_dphy.o \ + dpu_r2p0.o \ + dw_dsi_ctrl.o \ + dw_dsi_ctrl_ppi.o \ + megacores_pll.o

-obj-y += dpu_r2p0.o

diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c new file mode 100644 index 0000000..1470d7d --- /dev/null +++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c @@ -0,0 +1,792 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#include <linux/io.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/module.h> + +#include "dw_dsi_ctrl.h" + +/* + * Modify power status of DSI Host core + */ +void dsi_power_enable(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(enable, &reg->SOFT_RESET); +} +/* + * Enable/disable DPI video mode + */ +void dsi_video_mode(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(0, &reg->DSI_MODE_CFG); +} +/* + * Enable command mode (Generic interface) + */ +void dsi_cmd_mode(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(1, &reg->DSI_MODE_CFG); +} + +bool dsi_is_cmd_mode(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + return readl(&reg->DSI_MODE_CFG); +} +/* + * Configure the read back virtual channel for the generic interface + */ +void dsi_rx_vcid(struct dsi_context *ctx, u8 vc) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x1C virtual_channel_id; + + virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID); + virtual_channel_id.bits.gen_rx_vcid = vc; + + writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID); +} +/* + * Write the DPI video virtual channel destination + */ +void dsi_video_vcid(struct dsi_context *ctx, u8 vc) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x1C virtual_channel_id; + + virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID); + virtual_channel_id.bits.video_pkt_vcid = vc; + + writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID); +} +/* + * Set DPI video mode type (burst/non-burst - with sync pulses or events) + */ +void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x38 vid_mode_cfg; + + vid_mode_cfg.val = readl(&reg->VID_MODE_CFG); + vid_mode_cfg.bits.vid_mode_type = mode; + + writel(vid_mode_cfg.val, &reg->VID_MODE_CFG); +} +/* + * Set DPI video color coding + */ +void dsi_dpi_color_coding(struct dsi_context *ctx, int coding) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x20 dpi_video_format; + + dpi_video_format.val = readl(&reg->DPI_VIDEO_FORMAT); + dpi_video_format.bits.dpi_video_mode_format = coding; + + writel(dpi_video_format.val, &reg->DPI_VIDEO_FORMAT); +} +/* + * Configure the Horizontal Line time + * param "byte_cycle" taken to transmit the total of the horizontal line + */ +void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x2C video_line_time; + + video_line_time.val = readl(&reg->VIDEO_LINE_TIME); + video_line_time.bits.video_line_time = byte_cycle; + + writel(video_line_time.val, &reg->VIDEO_LINE_TIME); +} +/* + * Configure the Horizontal back porch time + * param "byte_cycle" taken to transmit the horizontal back porch + */ +void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x28 video_line_hblk_time; + + video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME); + video_line_hblk_time.bits.video_line_hbp_time = byte_cycle; + + writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME); +} +/* + * Configure the Horizontal sync time, + * param "byte_cycle" taken to transmit the horizontal sync + */ +void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x28 video_line_hblk_time; + + video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME); + video_line_hblk_time.bits.video_line_hsa_time = byte_cycle; + + writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME); +} +/* + * Configure the vertical active lines of the video stream + */ +void dsi_dpi_vact(struct dsi_context *ctx, u16 lines) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x34 video_active_lines; + + video_active_lines.val = readl(&reg->VIDEO_VACTIVE_LINES); + video_active_lines.bits.vactive_lines = lines; + + writel(video_active_lines.val, &reg->VIDEO_VACTIVE_LINES); +} + +void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x30 video_vblk_lines; + + video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES); + video_vblk_lines.bits.vfp_lines = lines; + + writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES); +} + +void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x30 video_vblk_lines; + + video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES); + video_vblk_lines.bits.vbp_lines = lines; + + writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES); +} + +void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x30 video_vblk_lines; + + video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES); + video_vblk_lines.bits.vsa_lines = lines; + + writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES); +} + +void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x38 vid_mode_cfg; + + vid_mode_cfg.val = readl(&reg->VID_MODE_CFG); + + vid_mode_cfg.bits.lp_hfp_en = enable; + vid_mode_cfg.bits.lp_hbp_en = enable; + + writel(vid_mode_cfg.val, &reg->VID_MODE_CFG); +} +/* + * Enable return to low power mode inside vertical active lines periods when + * timing allows + */ +void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x38 vid_mode_cfg; + + vid_mode_cfg.val = readl(&reg->VID_MODE_CFG); + + vid_mode_cfg.bits.lp_vact_en = enable; + vid_mode_cfg.bits.lp_vfp_en = enable; + vid_mode_cfg.bits.lp_vbp_en = enable; + vid_mode_cfg.bits.lp_vsa_en = enable; + + writel(vid_mode_cfg.val, &reg->VID_MODE_CFG); +} +/* + * Enable FRAME BTA ACK + */ +void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x38 vid_mode_cfg; + + vid_mode_cfg.val = readl(&reg->VID_MODE_CFG); + vid_mode_cfg.bits.frame_bta_ack_en = enable; + + writel(vid_mode_cfg.val, &reg->VID_MODE_CFG); +} +/* + * Write no of chunks to core - taken into consideration only when multi packet + * is enabled + */ +void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 num) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x24 video_pkt_config; + + video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG); + video_pkt_config.bits.video_line_chunk_num = num; + + writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG); +} +/* + * Write the null packet size - will only be taken into account when null + * packets are enabled. + */ +void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xC0 video_nullpkt_size; + + video_nullpkt_size.val = readl(&reg->VIDEO_NULLPKT_SIZE); + video_nullpkt_size.bits.video_nullpkt_size = size; + + writel(video_nullpkt_size.val, &reg->VIDEO_NULLPKT_SIZE); +} +/* + * Write video packet size. obligatory for sending video + */ +void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x24 video_pkt_config; + + video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG); + video_pkt_config.bits.video_pkt_size = size; + + writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG); +} +/* + * Specifiy the size of the packet memory write start/continue + */ +void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xC4 dcs_wm_pkt_size; + + dcs_wm_pkt_size.val = readl(&reg->DCS_WM_PKT_SIZE); + dcs_wm_pkt_size.bits.dcs_wm_pkt_size = size; + + writel(dcs_wm_pkt_size.val, &reg->DCS_WM_PKT_SIZE); +} +/* + * Enable tear effect acknowledge + */ +void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x68 cmd_mode_cfg; + + cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG); + cmd_mode_cfg.bits.tear_fx_en = enable; + + writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG); +} +/* + * Set DCS command packet transmission to transmission type + */ +void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x68 cmd_mode_cfg; + + cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG); + + cmd_mode_cfg.bits.gen_sw_0p_tx = enable; + cmd_mode_cfg.bits.gen_sw_1p_tx = enable; + cmd_mode_cfg.bits.gen_sw_2p_tx = enable; + cmd_mode_cfg.bits.gen_lw_tx = enable; + cmd_mode_cfg.bits.dcs_sw_0p_tx = enable; + cmd_mode_cfg.bits.dcs_sw_1p_tx = enable; + cmd_mode_cfg.bits.dcs_lw_tx = enable; + cmd_mode_cfg.bits.max_rd_pkt_size = enable; + + cmd_mode_cfg.bits.gen_sr_0p_tx = enable; + cmd_mode_cfg.bits.gen_sr_1p_tx = enable; + cmd_mode_cfg.bits.gen_sr_2p_tx = enable; + cmd_mode_cfg.bits.dcs_sr_0p_tx = enable; + + writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG); +} +/* + * Set DCS read command packet transmission to transmission type + */ +void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x38 vid_mode_cfg; + + vid_mode_cfg.val = readl(&reg->VID_MODE_CFG); + vid_mode_cfg.bits.lp_cmd_en = enable; + + writel(vid_mode_cfg.val, &reg->VID_MODE_CFG); +} + +/* + * Write command header in the generic interface (which also sends DCS commands) as a subset + */ +void dsi_set_packet_header(struct dsi_context *ctx, + u8 vc, + u8 type, + u8 wc_lsb, + u8 wc_msb) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x6C gen_hdr; + + gen_hdr.bits.gen_dt = type; + gen_hdr.bits.gen_vc = vc; + gen_hdr.bits.gen_wc_lsbyte = wc_lsb; + gen_hdr.bits.gen_wc_msbyte = wc_msb; + + writel(gen_hdr.val, &reg->GEN_HDR); +} +/* + * Write the payload of the long packet commands + */ +void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(payload, &reg->GEN_PLD_DATA); +} +/* + * Read the payload of the long packet commands + */ +u32 dsi_get_rx_payload(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + return readl(&reg->GEN_PLD_DATA); +} + +/* + * Enable Bus Turn-around request + */ +void dsi_bta_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(enable, &reg->TA_EN); +} +/* + * Enable EOTp reception + */ +void dsi_eotp_rx_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xBC eotp_en; + + eotp_en.val = readl(&reg->EOTP_EN); + eotp_en.bits.rx_eotp_en = enable; + + writel(eotp_en.val, &reg->EOTP_EN); +} +/* + * Enable EOTp transmission + */ +void dsi_eotp_tx_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xBC eotp_en; + + eotp_en.val = readl(&reg->EOTP_EN); + eotp_en.bits.tx_eotp_en = enable; + + writel(eotp_en.val, &reg->EOTP_EN); +} +/* + * Enable ECC reception, error correction and reporting + */ +void dsi_ecc_rx_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xB4 rx_pkt_check_config; + + rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG); + rx_pkt_check_config.bits.rx_pkt_ecc_en = enable; + + writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG); +} +/* + * Enable CRC reception, error reporting + */ +void dsi_crc_rx_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xB4 rx_pkt_check_config; + + rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG); + rx_pkt_check_config.bits.rx_pkt_crc_en = enable; + + writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG); +} +/* + * Get status of read command + */ +bool dsi_is_bta_returned(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_rdcmd_done; +} +/* + * Get the FULL status of generic read payload fifo + */ +bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_rdata_fifo_full; +} +/* + * Get the EMPTY status of generic read payload fifo + */ +bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_rdata_fifo_empty; +} +/* + * Get the FULL status of generic write payload fifo + */ +bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_wdata_fifo_full; +} +/* + * Get the EMPTY status of generic write payload fifo + */ +bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_wdata_fifo_empty; +} +/* + * Get the EMPTY status of generic command fifo + */ +bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x98 cmd_mode_status; + + cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS); + + return cmd_mode_status.bits.gen_cmd_cmd_fifo_empty; +} +/* + * DPI interface signal delay config + * param byte_cycle period for waiting after controller receiving HSYNC from + * DPI interface to start read pixel data from memory. + */ +void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xD0 video_sig_delay_config; + + video_sig_delay_config.val = readl(&reg->VIDEO_SIG_DELAY_CONFIG); + video_sig_delay_config.bits.video_sig_delay = byte_cycle; + + writel(video_sig_delay_config.val, &reg->VIDEO_SIG_DELAY_CONFIG); +} +/* + * Configure how many cycles of byte clock would the PHY module take + * to switch data lane from high speed to low power + */ +void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xAC phy_datalane_time_config; + + phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG); + phy_datalane_time_config.bits.phy_datalane_hs_to_lp_time = byte_cycle; + + writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG); +} +/* + * Configure how many cycles of byte clock would the PHY module take + * to switch the data lane from to low power high speed + */ +void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xAC phy_datalane_time_config; + + phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG); + phy_datalane_time_config.bits.phy_datalane_lp_to_hs_time = byte_cycle; + + writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG); +} +/* + * Configure how many cycles of byte clock would the PHY module take + * to switch clock lane from high speed to low power + */ +void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xA8 phy_clklane_time_config; + + phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG); + phy_clklane_time_config.bits.phy_clklane_hs_to_lp_time = byte_cycle; + + writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG); +} +/* + * Configure how many cycles of byte clock would the PHY module take + * to switch clock lane from to low power high speed + */ +void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0xA8 phy_clklane_time_config; + + phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG); + phy_clklane_time_config.bits.phy_clklane_lp_to_hs_time = byte_cycle; + + writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG); +} +/* + * Configure how many cycles of byte clock would the PHY module take + * to turn the bus around to start receiving + */ +void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(byte_cycle, &reg->MAX_READ_TIME); +} +/* + * Enable the automatic mechanism to stop providing clock in the clock + * lane when time allows + */ +void dsi_nc_clk_en(struct dsi_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x74 phy_clk_lane_lp_ctrl; + + phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL); + phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = enable; + + writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL); +} +/* + * Write transmission escape timeout + * a safe guard so that the state machine would reset if transmission + * takes too long + */ +void dsi_tx_escape_division(struct dsi_context *ctx, u8 div) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(div, &reg->TX_ESC_CLK_CONFIG); +} +/* + * Configure timeout divisions (so they would have more clock ticks) + * div no of hs cycles before transiting back to LP in + * (lane_clk / div) + */ +void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(div, &reg->TIMEOUT_CNT_CLK_CONFIG); +} +/* + * Configure the Low power receive time out + */ +void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(byte_cycle, &reg->LRX_H_TO_CONFIG); +} +/* + * Configure a high speed transmission time out + */ +void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(byte_cycle, &reg->HTX_TO_CONFIG); +} +/* + * Get the error 0 interrupt register status + */ +u32 dsi_int0_status(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x08 protocol_int_sts; + + protocol_int_sts.val = readl(&reg->PROTOCOL_INT_STS); + writel(protocol_int_sts.val, &reg->PROTOCOL_INT_CLR); + + if (protocol_int_sts.bits.dphy_errors_0) + DRM_ERROR("dphy_err: escape entry error\n"); + + if (protocol_int_sts.bits.dphy_errors_1) + DRM_ERROR("dphy_err: lp data transmission sync error\n"); + + if (protocol_int_sts.bits.dphy_errors_2) + DRM_ERROR("dphy_err: control error\n"); + + if (protocol_int_sts.bits.dphy_errors_3) + DRM_ERROR("dphy_err: LP0 contention error\n"); + + if (protocol_int_sts.bits.dphy_errors_4) + DRM_ERROR("dphy_err: LP1 contention error\n"); + + if (protocol_int_sts.bits.ack_with_err_0) + DRM_ERROR("ack_err: SoT error\n"); + + if (protocol_int_sts.bits.ack_with_err_1) + DRM_ERROR("ack_err: SoT Sync error\n"); + + if (protocol_int_sts.bits.ack_with_err_2) + DRM_ERROR("ack_err: EoT Sync error\n"); + + if (protocol_int_sts.bits.ack_with_err_3) + DRM_ERROR("ack_err: Escape Mode Entry Command error\n"); + + if (protocol_int_sts.bits.ack_with_err_4) + DRM_ERROR("ack_err: LP Transmit Sync error\n"); + + if (protocol_int_sts.bits.ack_with_err_5) + DRM_ERROR("ack_err: Peripheral Timeout error\n"); + + if (protocol_int_sts.bits.ack_with_err_6) + DRM_ERROR("ack_err: False Control error\n"); + + if (protocol_int_sts.bits.ack_with_err_7) + DRM_ERROR("ack_err: reserved (specific to device)\n"); + + if (protocol_int_sts.bits.ack_with_err_8) + DRM_ERROR("ack_err: ECC error, single-bit (corrected)\n"); + + if (protocol_int_sts.bits.ack_with_err_9) + DRM_ERROR("ack_err: ECC error, multi-bit (not corrected)\n"); + + if (protocol_int_sts.bits.ack_with_err_10) + DRM_ERROR("ack_err: checksum error (long packet only)\n"); + + if (protocol_int_sts.bits.ack_with_err_11) + DRM_ERROR("ack_err: not recognized DSI data type\n"); + + if (protocol_int_sts.bits.ack_with_err_12) + DRM_ERROR("ack_err: DSI VC ID Invalid\n"); + + if (protocol_int_sts.bits.ack_with_err_13) + DRM_ERROR("ack_err: invalid transmission length\n"); + + if (protocol_int_sts.bits.ack_with_err_14) + DRM_ERROR("ack_err: reserved (specific to device)\n"); + + if (protocol_int_sts.bits.ack_with_err_15) + DRM_ERROR("ack_err: DSI protocol violation\n"); + + return 0; +} +/* + * Get the error 1 interrupt register status + */ +u32 dsi_int1_status(struct dsi_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + union _0x10 internal_int_sts; + u32 status = 0; + + internal_int_sts.val = readl(&reg->INTERNAL_INT_STS); + writel(internal_int_sts.val, &reg->INTERNAL_INT_CLR); + + if (internal_int_sts.bits.receive_pkt_size_err) + DRM_ERROR("receive packet size error\n"); + + if (internal_int_sts.bits.eotp_not_receive_err) + DRM_ERROR("EoTp packet is not received\n"); + + if (internal_int_sts.bits.gen_cmd_cmd_fifo_wr_err) + DRM_ERROR("cmd header-fifo is full\n"); + + if (internal_int_sts.bits.gen_cmd_rdata_fifo_rd_err) + DRM_ERROR("cmd read-payload-fifo is empty\n"); + + if (internal_int_sts.bits.gen_cmd_rdata_fifo_wr_err) + DRM_ERROR("cmd read-payload-fifo is full\n"); + + if (internal_int_sts.bits.gen_cmd_wdata_fifo_wr_err) + DRM_ERROR("cmd write-payload-fifo is full\n"); + + if (internal_int_sts.bits.gen_cmd_wdata_fifo_rd_err) + DRM_ERROR("cmd write-payload-fifo is empty\n"); + + if (internal_int_sts.bits.dpi_pix_fifo_wr_err) { + DRM_ERROR("DPI pixel-fifo is full\n"); + status |= DSI_INT_STS_NEED_SOFT_RESET; + } + + if (internal_int_sts.bits.ecc_single_err) + DRM_ERROR("ECC single error in a received packet\n"); + + if (internal_int_sts.bits.ecc_multi_err) + DRM_ERROR("ECC multiple error in a received packet\n"); + + if (internal_int_sts.bits.crc_err) + DRM_ERROR("CRC error in the received packet payload\n"); + + if (internal_int_sts.bits.hs_tx_timeout) + DRM_ERROR("high-speed transmission timeout\n"); + + if (internal_int_sts.bits.lp_rx_timeout) + DRM_ERROR("low-power reception timeout\n"); + + return status; +} +/* + * Configure MASK (hiding) of interrupts coming from error 0 source + */ +void dsi_int0_mask(struct dsi_context *ctx, u32 mask) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(mask, &reg->MASK_PROTOCOL_INT); +} +/* + * Configure MASK (hiding) of interrupts coming from error 1 source + */ +void dsi_int1_mask(struct dsi_context *ctx, u32 mask) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->base; + + writel(mask, &reg->MASK_INTERNAL_INT); +} diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h new file mode 100644 index 0000000..ffba621 --- /dev/null +++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h @@ -0,0 +1,1475 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#ifndef _DW_DSI_CTRL_H_ +#define _DW_DSI_CTRL_H_ + +#include <asm/types.h> + +#include "sprd_dsi.h" + +struct dsi_reg { + union _0x00 { + u32 val; + struct _DSI_VERSION { + u32 dsi_version: 16; + u32 reserved: 16; + } bits; + } DSI_VERSION; + + union _0x04 { + u32 val; + struct _SOFT_RESET { + /* + * This bit configures the core either to work normal or to + * reset. It's default value is 0. After the core configur- + * ation, to enable the mipi_dsi_host, set this register to 1. + * 1: power up 0: reset core + */ + u32 dsi_soft_reset: 1; + + u32 reserved: 31; + } bits; + } SOFT_RESET; + + union _0x08 { + u32 val; + struct _PROTOCOL_INT_STS { + /* ErrEsc escape entry error from Lane 0 */ + u32 dphy_errors_0: 1; + + /* ErrSyncEsc low-power data transmission synchronization + * error from Lane 0 + */ + u32 dphy_errors_1: 1; + + /* ErrControl error from Lane 0 */ + u32 dphy_errors_2: 1; + + /* ErrContentionLP0 LP0 contention error from Lane 0 */ + u32 dphy_errors_3: 1; + + /* ErrContentionLP1 LP1 contention error from Lane 0 */ + u32 dphy_errors_4: 1; + + /* debug mode protocol errors */ + u32 protocol_debug_err: 11; + + /* SoT error from the Acknowledge error report */ + u32 ack_with_err_0: 1; + + /* SoT Sync error from the Acknowledge error report */ + u32 ack_with_err_1: 1; + + /* EoT Sync error from the Acknowledge error report */ + u32 ack_with_err_2: 1; + + /* Escape Mode Entry Command error from the Acknowledge + * error report + */ + u32 ack_with_err_3: 1; + + /* LP Transmit Sync error from the Acknowledge error report */ + u32 ack_with_err_4: 1; + + /* Peripheral Timeout error from the Acknowledge error report */ + u32 ack_with_err_5: 1; + + /* False Control error from the Acknowledge error report */ + u32 ack_with_err_6: 1; + + /* reserved (specific to device) from the Acknowledge error + * report + */ + u32 ack_with_err_7: 1; + + /* ECC error, single-bit (detected and corrected) from the + * Acknowledge error report + */ + u32 ack_with_err_8: 1; + + /* ECC error, multi-bit (detected, not corrected) from the + * Acknowledge error report + */ + u32 ack_with_err_9: 1; + + /* checksum error (long packet only) from the Acknowledge + * error report + */ + u32 ack_with_err_10: 1; + + /* not recognized DSI data type from the Acknowledge error + * report + */ + u32 ack_with_err_11: 1; + + /* DSI VC ID Invalid from the Acknowledge error report */ + u32 ack_with_err_12: 1; + + /* invalid transmission length from the Acknowledge error + * report + */ + u32 ack_with_err_13: 1; + + /* reserved (specific to device) from the Acknowledge error + * report + */ + u32 ack_with_err_14: 1; + + /* DSI protocol violation from the Acknowledge error report */ + u32 ack_with_err_15: 1; + + } bits; + } PROTOCOL_INT_STS; + + union _0x0C { + u32 val; + struct _MASK_PROTOCOL_INT { + u32 mask_dphy_errors_0: 1; + u32 mask_dphy_errors_1: 1; + u32 mask_dphy_errors_2: 1; + u32 mask_dphy_errors_3: 1; + u32 mask_dphy_errors_4: 1; + u32 mask_protocol_debug_err: 11; + u32 mask_ack_with_err_0: 1; + u32 mask_ack_with_err_1: 1; + u32 mask_ack_with_err_2: 1; + u32 mask_ack_with_err_3: 1; + u32 mask_ack_with_err_4: 1; + u32 mask_ack_with_err_5: 1; + u32 mask_ack_with_err_6: 1; + u32 mask_ack_with_err_7: 1; + u32 mask_ack_with_err_8: 1; + u32 mask_ack_with_err_9: 1; + u32 mask_ack_with_err_10: 1; + u32 mask_ack_with_err_11: 1; + u32 mask_ack_with_err_12: 1; + u32 mask_ack_with_err_13: 1; + u32 mask_ack_with_err_14: 1; + u32 mask_ack_with_err_15: 1; + } bits; + } MASK_PROTOCOL_INT; + + union _0x10 { + u32 val; + struct _INTERNAL_INT_STS { + /* This bit indicates that the packet size error is detected + * during the packet reception. + */ + u32 receive_pkt_size_err: 1; + + /* This bit indicates that the EoTp packet is not received at + * the end of the incoming peripheral transmission + */ + u32 eotp_not_receive_err: 1; + + /* This bit indicates that the system tried to write a command + * through the Generic interface and the FIFO is full. There- + * fore, the command is not written. + */ + u32 gen_cmd_cmd_fifo_wr_err: 1; + + /* This bit indicates that during a DCS read data, the payload + * FIFO becomes empty and the data sent to the interface is + * corrupted. + */ + u32 gen_cmd_rdata_fifo_rd_err: 1; + + /* This bit indicates that during a generic interface packet + * read back, the payload FIFO becomes full and the received + * data is corrupted. + */ + u32 gen_cmd_rdata_fifo_wr_err: 1; + + /* This bit indicates that the system tried to write a payload + * data through the Generic interface and the FIFO is full. + * Therefore, the payload is not written. + */ + u32 gen_cmd_wdata_fifo_wr_err: 1; + + /* This bit indicates that during a Generic interface packet + * build, the payload FIFO becomes empty and corrupt data is + * sent. + */ + u32 gen_cmd_wdata_fifo_rd_err: 1; + + /* This bit indicates that during a DPI pixel line storage, + * the payload FIFO becomes full and the data stored is + * corrupted. + */ + u32 dpi_pix_fifo_wr_err: 1; + + /* internal debug error */ + u32 internal_debug_err: 19; + + /* This bit indicates that the ECC single error is detected + * and corrected in a received packet. + */ + u32 ecc_single_err: 1; + + /* This bit indicates that the ECC multiple error is detected + * in a received packet. + */ + u32 ecc_multi_err: 1; + + /* This bit indicates that the CRC error is detected in the + * received packet payload. + */ + u32 crc_err: 1; + + /* This bit indicates that the high-speed transmission timeout + * counter reached the end and contention is detected. + */ + u32 hs_tx_timeout: 1; + + /* This bit indicates that the low-power reception timeout + * counter reached the end and contention is detected. + */ + u32 lp_rx_timeout: 1; + + } bits; + } INTERNAL_INT_STS; + + union _0x14 { + u32 val; + struct _MASK_INTERNAL_INT { + u32 mask_receive_pkt_size_err: 1; + u32 mask_eopt_not_receive_err: 1; + u32 mask_gen_cmd_cmd_fifo_wr_err: 1; + u32 mask_gen_cmd_rdata_fifo_rd_err: 1; + u32 mask_gen_cmd_rdata_fifo_wr_err: 1; + u32 mask_gen_cmd_wdata_fifo_wr_err: 1; + u32 mask_gen_cmd_wdata_fifo_rd_err: 1; + u32 mask_dpi_pix_fifo_wr_err: 1; + u32 mask_internal_debug_err: 19; + u32 mask_ecc_single_err: 1; + u32 mask_ecc_multi_err: 1; + u32 mask_crc_err: 1; + u32 mask_hs_tx_timeout: 1; + u32 mask_lp_rx_timeout: 1; + } bits; + } MASK_INTERNAL_INT; + + union _0x18 { + u32 val; + struct _DSI_MODE_CFG { + /* This bit configures the operation mode + * 0: Video mode ; 1: Command mode + */ + u32 cmd_video_mode: 1; + + u32 reserved: 31; + + } bits; + } DSI_MODE_CFG; + + union _0x1C { + u32 val; + struct _VIRTUAL_CHANNEL_ID { + /* This field indicates the Generic interface read-back + * virtual channel identification + */ + u32 gen_rx_vcid: 2; + + /* This field configures the DPI virtual channel id that + * is indexed to the VIDEO mode packets + */ + u32 video_pkt_vcid: 2; + + u32 reserved: 28; + + } bits; + } VIRTUAL_CHANNEL_ID; + + union _0x20 { + u32 val; + struct _DPI_VIDEO_FORMAT { + /* + * This field configures the DPI color coding as follows: + * 0000: 16-bit configuration 1 + * 0001: 16-bit configuration 2 + * 0010: 16-bit configuration 3 + * 0011: 18-bit configuration 1 + * 0100: 18-bit configuration 2 + * 0101: 24-bit + * 0110: 20-bit YCbCr 4:2:2 loosely packed + * 0111: 24-bit YCbCr 4:2:2 + * 1000: 16-bit YCbCr 4:2:2 + * 1001: 30-bit + * 1010: 36-bit + * 1011: 12-bit YCbCr 4:2:0 + * 1100: Compression Display Stream + * 1101-1111: 12-bit YCbCr 4:2:0 + */ + u32 dpi_video_mode_format: 6; + + /* When set to 1, this bit activates loosely packed + * variant to 18-bit configurations + */ + u32 loosely18_en: 1; + + u32 reserved: 25; + + } bits; + } DPI_VIDEO_FORMAT; + + union _0x24 { + u32 val; + struct _VIDEO_PKT_CONFIG { + /* + * This field configures the number of pixels in a single + * video packet. For 18-bit not loosely packed data types, + * this number must be a multiple of 4. For YCbCr data + * types, it must be a multiple of 2, as described in the + * DSI specification. + */ + u32 video_pkt_size: 16; + + /* + * This register configures the number of chunks to be + * transmitted during a Line period (a chunk consists of + * a video packet and a null packet). If set to 0 or 1, + * the video line is transmitted in a single packet. If + * set to 1, the packet is part of a chunk, so a null packet + * follows it if vid_null_size > 0. Otherwise, multiple chunks + * are used to transmit each video line. + */ + u32 video_line_chunk_num: 16; + + } bits; + } VIDEO_PKT_CONFIG; + + union _0x28 { + u32 val; + struct _VIDEO_LINE_HBLK_TIME { + /* This field configures the Horizontal Back Porch period + * in lane byte clock cycles + */ + u32 video_line_hbp_time: 16; + + /* This field configures the Horizontal Synchronism Active + * period in lane byte clock cycles + */ + u32 video_line_hsa_time: 16; + + } bits; + } VIDEO_LINE_HBLK_TIME; + + union _0x2C { + u32 val; + struct _VIDEO_LINE_TIME { + /* This field configures the size of the total line time + * (HSA+HBP+HACT+HFP) counted in lane byte clock cycles + */ + u32 video_line_time: 16; + + u32 reserved: 16; + + } bits; + } VIDEO_LINE_TIME; + + union _0x30 { + u32 val; + struct _VIDEO_VBLK_LINES { + /* This field configures the Vertical Front Porch period + * measured in number of horizontal lines + */ + u32 vfp_lines: 10; + + /* This field configures the Vertical Back Porch period + * measured in number of horizontal lines + */ + u32 vbp_lines: 10; + + /* This field configures the Vertical Synchronism Active + * period measured in number of horizontal lines + */ + u32 vsa_lines: 10; + + u32 reserved: 2; + + } bits; + } VIDEO_VBLK_LINES; + + union _0x34 { + u32 val; + struct _VIDEO_VACTIVE_LINES { + /* This field configures the Vertical Active period measured + * in number of horizontal lines + */ + u32 vactive_lines: 14; + + u32 reserved: 18; + + } bits; + } VIDEO_VACTIVE_LINES; + + union _0x38 { + u32 val; + struct _VID_MODE_CFG { + /* + * This field indicates the video mode transmission type as + * follows: + * 00: Non-burst with sync pulses + * 01: Non-burst with sync events + * 10 and 11: Burst mode + */ + u32 vid_mode_type: 2; + + u32 reserved_0: 6; + + /* When set to 1, this bit enables the return to low-power + * inside the VSA period when timing allows. + */ + u32 lp_vsa_en: 1; + + /* When set to 1, this bit enables the return to low-power + * inside the VBP period when timing allows. + */ + u32 lp_vbp_en: 1; + + /* When set to 1, this bit enables the return to low-power + * inside the VFP period when timing allows. + */ + u32 lp_vfp_en: 1; + + /* When set to 1, this bit enables the return to low-power + * inside the VACT period when timing allows. + */ + u32 lp_vact_en: 1; + + /* When set to 1, this bit enables the return to low-power + * inside the HBP period when timing allows. + */ + u32 lp_hbp_en: 1; + + /* When set to 1, this bit enables the return to low-power + * inside the HFP period when timing allows. + */ + u32 lp_hfp_en: 1; + + /* When set to 1, this bit enables the request for an ack- + * nowledge response at the end of a frame. + */ + u32 frame_bta_ack_en: 1; + + /* When set to 1, this bit enables the command transmission + * only in low-power mode. + */ + u32 lp_cmd_en: 1; + + u32 reserved_1: 16; + + } bits; + } VID_MODE_CFG; + + union _0x3C { + u32 val; + struct _SDF_MODE_CONFIG { + /* + * This field defines the 3D mode on/off & display orientation: + * 00: 3D mode off (2D mode on) + * 01: 3D mode on, portrait orientation + * 10: 3D mode on, landscape orientation + * 11: Reserved + */ + u32 rf_3d_mode: 2; + + /* + * This field defines the 3D image format: + * 00: Line (alternating lines of left and right data) + * 01: Frame (alternating frames of left and right data) + * 10: Pixel (alternating pixels of left and right data) + * 11: Reserved + */ + u32 rf_3d_format: 2; + + /* + * This field defines whether there is a second VSYNC pulse + * between Left and Right Images, when 3D Image Format is + * Frame-based: + * 0: No sync pulses between left and right data + * 1: Sync pulse (HSYNC, VSYNC, blanking) between left and + * right data + */ + u32 second_vsync_en: 1; + + /* + * This bit defines the left or right order: + * 0: Left eye data is sent first, and then the right eye data + * is sent. + * 1: Right eye data is sent first, and then the left eye data + * is sent. + */ + u32 left_right_order: 1; + + u32 reserved_0: 2; + + /* + * When set, causes the next VSS packet to include 3D control + * payload in every VSS packet. + */ + u32 rf_3d_payload_en: 1; + + u32 reserved_1: 23; + + } bits; + } SDF_MODE_CONFIG; + + union _0x40 { + u32 val; + struct _TIMEOUT_CNT_CLK_CONFIG { + /* + * This field indicates the division factor for the Time Out + * clock used as the timing unit in the configuration of HS to + * LP and LP to HS transition error. + */ + u32 timeout_cnt_clk_config: 16; + + u32 reserved: 16; + + } bits; + } TIMEOUT_CNT_CLK_CONFIG; + + union _0x44 { + u32 val; + struct _HTX_TO_CONFIG { + /* + * This field configures the timeout counter that triggers + * a high speed transmission timeout contention detection + * (measured in TO_CLK_DIVISION cycles). + * + * If using the non-burst mode and there is no sufficient + * time to switch from HS to LP and back in the period which + * is from one line data finishing to the next line sync + * start, the DSI link returns the LP state once per frame, + * then you should configure the TO_CLK_DIVISION and + * hstx_to_cnt to be in accordance with: + * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the + * time of one FRAME data transmission * (1 + 10%) + * + * In burst mode, RGB pixel packets are time-compressed, + * leaving more time during a scan line. Therefore, if in + * burst mode and there is sufficient time to switch from HS + * to LP and back in the period of time from one line data + * finishing to the next line sync start, the DSI link can + * return LP mode and back in this time interval to save power. + * For this, configure the TO_CLK_DIVISION and hstx_to_cnt + * to be in accordance with: + * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the + * time of one LINE data transmission * (1 + 10%) + */ + u32 htx_to_cnt_limit: 32; + } bits; + } HTX_TO_CONFIG; + + union _0x48 { + u32 val; + struct _LRX_H_TO_CONFIG { + /* + * This field configures the timeout counter that triggers + * a low-power reception timeout contention detection (measured + * in TO_CLK_DIVISION cycles). + */ + u32 lrx_h_to_cnt_limit: 32; + } bits; + } LRX_H_TO_CONFIG; + + union _0x4C { + u32 val; + struct _RD_PRESP_TO_CONFIG { + /* + * This field sets a period for which the DWC_mipi_dsi_host + * keeps the link still, after sending a low-power read oper- + * ation. This period is measured in cycles of lanebyteclk. + * The counting starts when the D-PHY enters the Stop state + * and causes no interrupts. + */ + u32 lprd_presp_to_cnt_limit: 16; + + /* + * This field sets a period for which the DWC_mipi_dsi_host + * keeps the link still, after sending a high-speed read oper- + * ation. This period is measured in cycles of lanebyteclk. + * The counting starts when the D-PHY enters the Stop state + * and causes no interrupts. + */ + u32 hsrd_presp_to_cnt_limit: 16; + + } bits; + } RD_PRESP_TO_CONFIG; + + union _0x50 { + u32 val; + struct _HSWR_PRESP_TO_CONFIG { + /* + * This field sets a period for which the DWC_mipi_dsi_host + * keeps the link inactive after sending a high-speed write + * operation. This period is measured in cycles of lanebyteclk. + * The counting starts when the D-PHY enters the Stop state + * and causes no interrupts. + */ + u32 hswr_presp_to_cnt_limit: 16; + + u32 reserved_0: 8; + + /* + * When set to 1, this bit ensures that the peripheral response + * timeout caused by hs_wr_to_cnt is used only once per eDPI + * frame, when both the following conditions are met: + * dpivsync_edpiwms has risen and fallen. + * Packets originated from eDPI have been transmitted and its + * FIFO is empty again In this scenario no non-eDPI requests + * are sent to the D-PHY, even if there is traffic from generic + * or DBI ready to be sent, making it return to stop state. + * When it does so, PRESP_TO counter is activated and only when + * it finishes does the controller send any other traffic that + * is ready. + */ + u32 hswr_presp_to_mode: 1; + + u32 reserved_1: 7; + + } bits; + } HSWR_PRESP_TO_CONFIG; + + union _0x54 { + u32 val; + struct _LPWR_PRESP_TO_CONFIG { + /* + * This field sets a period for which the DWC_mipi_dsi_host + * keeps the link still, after sending a low-power write oper- + * ation. This period is measured in cycles of lanebyteclk. + * The counting starts when the D-PHY enters the Stop state + * and causes no interrupts. + */ + u32 lpwr_presp_to_cnt_limit: 16; + + u32 reserved: 16; + + } bits; + } LPWR_PRESP_TO_CONFIG; + + union _0x58 { + u32 val; + struct _BTA_PRESP_TO_CONFIG { + /* + * This field sets a period for which the DWC_mipi_dsi_host + * keeps the link still, after completing a Bus Turn-Around. + * This period is measured in cycles of lanebyteclk. The + * counting starts when the D-PHY enters the Stop state and + * causes no interrupts. + */ + u32 bta_presp_to_cnt_limit: 16; + + u32 reserved: 16; + + } bits; + } BTA_PRESP_TO_CONFIG; + + union _0x5C { + u32 val; + struct _TX_ESC_CLK_CONFIG { + /* + * This field indicates the division factor for the TX Escape + * clock source (lanebyteclk). The values 0 and 1 stop the + * TX_ESC clock generation. + */ + u32 tx_esc_clk_config: 16; + + u32 reserved: 16; + + } bits; + } TX_ESC_CLK_CONFIG; + + union _0x60 { + u32 val; + struct _VACT_CMD_TRANS_LIMIT { + /* + * This field is used for the transmission of commands in + * low-power mode. It defines the size, in bytes, of the + * largest packet that can fit in a line during the VACT + * region. + */ + u32 vact_cmd_trans_limit: 8; + + u32 reserved: 24; + + } bits; + } VACT_CMD_TRANS_LIMIT; + + union _0x64 { + u32 val; + struct _VBLK_CMD_TRANS_LIMIT { + /* + * This field is used for the transmission of commands in + * low-power mode. It defines the size, in bytes, of the + * largest packet that can fit in a line during the VSA, VBP, + * and VFP regions. + */ + u32 vblk_cmd_trans_limit: 8; + + u32 reserved: 24; + + } bits; + } VBLK_CMD_TRANS_LIMIT; + + union _0x68 { + u32 val; + struct _CMD_MODE_CFG { + /* + * When set to 1, this bit enables the tearing effect + * acknowledge request. + */ + u32 tear_fx_en: 1; + + /* + * When set to 1, this bit enables the acknowledge request + * after each packet transmission. + */ + u32 ack_rqst_en: 1; + + u32 reserved_0: 3; + + u32 pps_tx: 1; + u32 exq_tx: 1; + u32 cmc_tx: 1; + + /* + * This bit configures the Generic short write packet with + * zero parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sw_0p_tx: 1; + + /* + * This bit configures the Generic short write packet with + * one parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sw_1p_tx: 1; + + /* + * This bit configures the Generic short write packet with + * two parameters command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sw_2p_tx: 1; + + /* + * This bit configures the Generic short read packet with + * zero parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sr_0p_tx: 1; + + /* + * This bit configures the Generic short read packet with + * one parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sr_1p_tx: 1; + + /* + * This bit configures the Generic short read packet with + * two parameters command transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_sr_2p_tx: 1; + + /* + * This bit configures the Generic long write packet command + * transmission type: + * 0: High-speed 1: Low-power + */ + u32 gen_lw_tx: 1; + + u32 reserved_1: 1; + + /* + * This bit configures the DCS short write packet with zero + * parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 dcs_sw_0p_tx: 1; + + /* + * This bit configures the DCS short write packet with one + * parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 dcs_sw_1p_tx: 1; + + /* + * This bit configures the DCS short read packet with zero + * parameter command transmission type: + * 0: High-speed 1: Low-power + */ + u32 dcs_sr_0p_tx: 1; + + /* + * This bit configures the DCS long write packet command + * transmission type: + * 0: High-speed 1: Low-power + */ + u32 dcs_lw_tx: 1; + + u32 reserved_2: 4; + + /* + * This bit configures the maximum read packet size command + * transmission type: + * 0: High-speed 1: Low-power + */ + u32 max_rd_pkt_size: 1; + + u32 reserved_3: 7; + + } bits; + } CMD_MODE_CFG; + + union _0x6C { + u32 val; + struct _GEN_HDR { + /* + * This field configures the packet data type of the header + * packet. + */ + u32 gen_dt: 6; + + /* + * This field configures the virtual channel id of the header + * packet. + */ + u32 gen_vc: 2; + + /* + * This field configures the least significant byte of the + * header packet's Word count for long packets or data 0 for + * short packets. + */ + u32 gen_wc_lsbyte: 8; + + /* + * This field configures the most significant byte of the + * header packet's word count for long packets or data 1 for + * short packets. + */ + u32 gen_wc_msbyte: 8; + + u32 reserved: 8; + + } bits; + } GEN_HDR; + + union _0x70 { + u32 val; + struct _GEN_PLD_DATA { + /* This field indicates byte 1 of the packet payload. */ + u32 gen_pld_b1: 8; + + /* This field indicates byte 2 of the packet payload. */ + u32 gen_pld_b2: 8; + + /* This field indicates byte 3 of the packet payload. */ + u32 gen_pld_b3: 8; + + /* This field indicates byte 4 of the packet payload. */ + u32 gen_pld_b4: 8; + + } bits; + } GEN_PLD_DATA; + + union _0x74 { + u32 val; + struct _PHY_CLK_LANE_LP_CTRL { + /* This bit controls the D-PHY PPI txrequestclkhs signal */ + u32 phy_clklane_tx_req_hs: 1; + + /* This bit enables the automatic mechanism to stop providing + * clock in the clock lane when time allows. + */ + u32 auto_clklane_ctrl_en: 1; + + u32 reserved: 30; + } bits; + } PHY_CLK_LANE_LP_CTRL; + + union _0x78 { + u32 val; + struct _PHY_INTERFACE_CTRL { + /* When set to 0, this bit places the D-PHY macro in power- + * down state. + */ + u32 rf_phy_shutdown: 1; + + /* When set to 0, this bit places the digital section of the + * D-PHY in the reset state. + */ + u32 rf_phy_reset_n: 1; + + /* When set to 1, this bit enables the D-PHY Clock Lane + * module. + */ + u32 rf_phy_clk_en: 1; + + /* When the D-PHY is in ULPS, this bit enables the D-PHY PLL. */ + u32 rf_phy_force_pll: 1; + + /* ULPS mode Request on clock lane */ + u32 rf_phy_clk_txrequlps: 1; + + /* ULPS mode Exit on clock lane */ + u32 rf_phy_clk_txexitulps: 1; + + /* ULPS mode Request on all active data lanes */ + u32 rf_phy_data_txrequlps: 1; + + /* ULPS mode Exit on all active data lanes */ + u32 rf_phy_data_txexitulps: 1; + + u32 reserved: 24; + } bits; + } PHY_INTERFACE_CTRL; + + union _0x7C { + u32 val; + struct _PHY_TX_TRIGGERS { + /* This field controls the trigger transmissions. */ + u32 phy_tx_triggers: 4; + + u32 reserved: 28; + } bits; + } PHY_TX_TRIGGERS; + + union _0x80 { + u32 val; + struct _DESKEW_START { + u32 deskew_start: 1; + u32 reserved: 31; + } bits; + } DESKEW_START; + + union _0x84 { + u32 val; + struct _DESKEW_MODE { + u32 deskew_mode: 2; + u32 reserved: 30; + } bits; + } DESKEW_MODE; + + union _0x88 { + u32 val; + struct _DESKEW_TIME { + u32 deskew_time: 32; + } bits; + } DESKEW_TIME; + + union _0x8C { + u32 val; + struct _DESKEW_PERIOD { + u32 deskew_period: 32; + } bits; + } DESKEW_PERIOD; + + union _0x90 { + u32 val; + struct _DESKEW_BUSY { + u32 deskew_busy: 1; + u32 reserved: 31; + } bits; + } DESKEW_BUSY; + + union _0x94 { + u32 val; + struct _DESKEW_LANE_MASK { + u32 deskew_lane0_mask: 1; + u32 deskew_lane1_mask: 1; + u32 deskew_lane2_mask: 1; + u32 deskew_lane3_mask: 1; + u32 reserved: 28; + } bits; + } DESKEW_LANE_MASK; + + union _0x98 { + u32 val; + struct _CMD_MODE_STATUS { + /* + * This bit is set when a read command is issued and cleared + * when the entire response is stored in the FIFO. + * Value after reset: 0x0 + * + * NOTE: + * For mipi-dsi-r1p0 IP, this bit is set immediately when + * the read cmd is set to the GEN_HDR register. + * + * For dsi-ctrl-r1p0 IP, this bit is set only after the read + * cmd was actually sent out from the controller. + */ + u32 gen_cmd_rdcmd_ongoing: 1; + + /* + * This bit indicates the empty status of the generic read + * payload FIFO. + * Value after reset: 0x1 + */ + u32 gen_cmd_rdata_fifo_empty: 1; + + /* + * This bit indicates the full status of the generic read + * payload FIFO. + * Value after reset: 0x0 + */ + u32 gen_cmd_rdata_fifo_full: 1; + + /* + * This bit indicates the empty status of the generic write + * payload FIFO. + * Value after reset: 0x1 + */ + u32 gen_cmd_wdata_fifo_empty: 1; + + /* + * This bit indicates the full status of the generic write + * payload FIFO. + * Value after reset: 0x0 + */ + u32 gen_cmd_wdata_fifo_full: 1; + + /* + * This bit indicates the empty status of the generic + * command FIFO. + * Value after reset: 0x1 + */ + u32 gen_cmd_cmd_fifo_empty: 1; + + /* + * This bit indicates the full status of the generic + * command FIFO. + * Value after reset: 0x0 + */ + u32 gen_cmd_cmd_fifo_full: 1; + + /* + * This bit is set when the entire response of read is + * stored in the rx payload FIFO. And it will be cleared + * automaticlly after read this bit each time. + * Value after reset: 0x0 + * + * NOTE: this bit is just supported for dsi-ctrl-r1p0 IP + */ + u32 gen_cmd_rdcmd_done: 1; + + u32 reserved : 24; + + } bits; + } CMD_MODE_STATUS; + + union _0x9C { + u32 val; + struct _PHY_STATUS { + /* the status of phydirection D-PHY signal */ + u32 phy_direction: 1; + + /* the status of phylock D-PHY signal */ + u32 phy_lock: 1; + + /* the status of rxulpsesc0lane D-PHY signal */ + u32 phy_rxulpsesc0lane: 1; + + /* the status of phystopstateclklane D-PHY signal */ + u32 phy_stopstateclklane: 1; + + /* the status of phystopstate0lane D-PHY signal */ + u32 phy_stopstate0lane: 1; + + /* the status of phystopstate1lane D-PHY signal */ + u32 phy_stopstate1lane: 1; + + /* the status of phystopstate2lane D-PHY signal */ + u32 phy_stopstate2lane: 1; + + /* the status of phystopstate3lane D-PHY signal */ + u32 phy_stopstate3lane: 1; + + /* the status of phyulpsactivenotclk D-PHY signal */ + u32 phy_ulpsactivenotclk: 1; + + /* the status of ulpsactivenot0lane D-PHY signal */ + u32 phy_ulpsactivenot0lane: 1; + + /* the status of ulpsactivenot1lane D-PHY signal */ + u32 phy_ulpsactivenot1lane: 1; + + /* the status of ulpsactivenot2lane D-PHY signal */ + u32 phy_ulpsactivenot2lane: 1; + + /* the status of ulpsactivenot3lane D-PHY signal */ + u32 phy_ulpsactivenot3lane: 1; + + u32 reserved: 19; + + } bits; + } PHY_STATUS; + + union _0xA0 { + u32 val; + struct _PHY_MIN_STOP_TIME { + /* This field configures the minimum wait period to request + * a high-speed transmission after the Stop state. + */ + u32 phy_min_stop_time: 8; + + u32 reserved: 24; + } bits; + } PHY_MIN_STOP_TIME; + + union _0xA4 { + u32 val; + struct _PHY_LANE_NUM_CONFIG { + /* + * This field configures the number of active data lanes: + * 00: One data lane (lane 0) + * 01: Two data lanes (lanes 0 and 1) + * 10: Three data lanes (lanes 0, 1, and 2) + * 11: Four data lanes (lanes 0, 1, 2, and 3) + */ + u32 phy_lane_num: 2; + + u32 reserved: 30; + + } bits; + } PHY_LANE_NUM_CONFIG; + + union _0xA8 { + u32 val; + struct _PHY_CLKLANE_TIME_CONFIG { + /* + * This field configures the maximum time that the D-PHY + * clock lane takes to go from low-power to high-speed + * transmission measured in lane byte clock cycles. + */ + u32 phy_clklane_lp_to_hs_time: 16; + + /* + * This field configures the maximum time that the D-PHY + * clock lane takes to go from high-speed to low-power + * transmission measured in lane byte clock cycles. + */ + u32 phy_clklane_hs_to_lp_time: 16; + + } bits; + } PHY_CLKLANE_TIME_CONFIG; + + union _0xAC { + u32 val; + struct _PHY_DATALANE_TIME_CONFIG { + /* + * This field configures the maximum time that the D-PHY data + * lanes take to go from low-power to high-speed transmission + * measured in lane byte clock cycles. + */ + u32 phy_datalane_lp_to_hs_time: 16; + + /* + * This field configures the maximum time that the D-PHY data + * lanes take to go from high-speed to low-power transmission + * measured in lane byte clock cycles. + */ + u32 phy_datalane_hs_to_lp_time: 16; + + } bits; + } PHY_DATALANE_TIME_CONFIG; + + union _0xB0 { + u32 val; + struct _MAX_READ_TIME { + /* + * This field configures the maximum time required to perform + * a read command in lane byte clock cycles. This register can + * only be modified when no read command is in progress. + */ + u32 max_rd_time: 16; + + u32 reserved: 16; + + } bits; + } MAX_READ_TIME; + + union _0xB4 { + u32 val; + struct _RX_PKT_CHECK_CONFIG { + /* When set to 1, this bit enables the ECC reception, error + * correction, and reporting. + */ + u32 rx_pkt_ecc_en: 1; + + /* When set to 1, this bit enables the CRC reception and error + * reporting. + */ + u32 rx_pkt_crc_en: 1; + + u32 reserved: 30; + + } bits; + } RX_PKT_CHECK_CONFIG; + + union _0xB8 { + u32 val; + struct _TA_EN { + /* When set to 1, this bit enables the Bus Turn-Around (BTA) + * request. + */ + u32 ta_en: 1; + + u32 reserved: 31; + + } bits; + } TA_EN; + + union _0xBC { + u32 val; + struct _EOTP_EN { + /* When set to 1, this bit enables the EoTp transmission */ + u32 tx_eotp_en: 1; + + /* When set to 1, this bit enables the EoTp reception. */ + u32 rx_eotp_en: 1; + + u32 reserved: 30; + + } bits; + } EOTP_EN; + + union _0xC0 { + u32 val; + struct _VIDEO_NULLPKT_SIZE { + /* + * This register configures the number of bytes inside a null + * packet. Setting it to 0 disables the null packets. + */ + u32 video_nullpkt_size: 13; + + u32 reserved: 19; + + } bits; + } VIDEO_NULLPKT_SIZE; + + union _0xC4 { + u32 val; + struct _DCS_WM_PKT_SIZE { + /* + * This field configures the maximum allowed size for an eDPI + * write memory command, measured in pixels. Automatic parti- + * tioning of data obtained from eDPI is permanently enabled. + */ + u32 dcs_wm_pkt_size: 16; + + u32 reserved: 16; + } bits; + } DCS_WM_PKT_SIZE; + + union _0xC8 { + u32 val; + struct _PROTOCOL_INT_CLR { + u32 clr_dphy_errors_0: 1; + u32 clr_dphy_errors_1: 1; + u32 clr_dphy_errors_2: 1; + u32 clr_dphy_errors_3: 1; + u32 clr_dphy_errors_4: 1; + u32 clr_protocol_debug_err: 11; + u32 clr_ack_with_err_0: 1; + u32 clr_ack_with_err_1: 1; + u32 clr_ack_with_err_2: 1; + u32 clr_ack_with_err_3: 1; + u32 clr_ack_with_err_4: 1; + u32 clr_ack_with_err_5: 1; + u32 clr_ack_with_err_6: 1; + u32 clr_ack_with_err_7: 1; + u32 clr_ack_with_err_8: 1; + u32 clr_ack_with_err_9: 1; + u32 clr_ack_with_err_10: 1; + u32 clr_ack_with_err_11: 1; + u32 clr_ack_with_err_12: 1; + u32 clr_ack_with_err_13: 1; + u32 clr_ack_with_err_14: 1; + u32 clr_ack_with_err_15: 1; + } bits; + } PROTOCOL_INT_CLR; + + union _0xCC { + u32 val; + struct _INTERNAL_INT_CLR { + u32 clr_receive_pkt_size_err: 1; + u32 clr_eopt_not_receive_err: 1; + u32 clr_gen_cmd_cmd_fifo_wr_err: 1; + u32 clr_gen_cmd_rdata_fifo_rd_err: 1; + u32 clr_gen_cmd_rdata_fifo_wr_err: 1; + u32 clr_gen_cmd_wdata_fifo_wr_err: 1; + u32 clr_gen_cmd_wdata_fifo_rd_err: 1; + u32 clr_dpi_pix_fifo_wr_err: 1; + u32 clr_internal_debug_err: 19; + u32 clr_ecc_single_err: 1; + u32 clr_ecc_multi_err: 1; + u32 clr_crc_err: 1; + u32 clr_hs_tx_timeout: 1; + u32 clr_lp_rx_timeout: 1; + } bits; + } INTERNAL_INT_CLR; + + union _0xD0 { + u32 val; + struct _VIDEO_SIG_DELAY_CONFIG { + + /* + * DPI interface signal delay to be used in clk lanebyte + * domain for control logic to read video data from pixel + * memory in mannal mode, measured in clk_lanebyte cycles + */ + u32 video_sig_delay: 24; + + /* + * 1'b1: mannal mode + * dsi controller will use video_sig_delay value as + * the delay for the packet handle logic to read video + * data from pixel memory. + * + * 1'b0: auto mode + * dsi controller will auto calculate the delay for + * the packet handle logic to read video data from + * pixel memory. + */ + u32 video_sig_delay_mode: 1; + + u32 reserved: 7; + } bits; + } VIDEO_SIG_DELAY_CONFIG; + + u32 reservedD4_EC[7]; + + union _0xF0 { + u32 val; + struct _PHY_TST_CTRL0 { + /* PHY test interface clear (active high) */ + u32 phy_testclr: 1; + + /* This bit is used to clock the TESTDIN bus into the D-PHY */ + u32 phy_testclk: 1; + + u32 reserved: 30; + } bits; + } PHY_TST_CTRL0; + + union _0xF4 { + u32 val; + struct _PHY_TST_CTRL1 { + /* PHY test interface input 8-bit data bus for internal + * register programming and test functionalities access. + */ + u32 phy_testdin: 8; + + /* PHY output 8-bit data bus for read-back and internal + * probing functionalities. + */ + u32 phy_testdout: 8; + + /* + * PHY test interface operation selector: + * 1: The address write operation is set on the falling edge + * of the testclk signal. + * 0: The data write operation is set on the rising edge of + * the testclk signal. + */ + u32 phy_testen: 1; + + u32 reserved: 15; + } bits; + } PHY_TST_CTRL1; + + u32 reservedF8_1FC[66]; + + union _0x200 { + u32 val; + struct _INT_PLL_STS { + u32 int_pll_sts: 1; + u32 reserved: 31; + } bits; + } INT_PLL_STS; + + union _0x204 { + u32 val; + struct _INT_PLL_MSK { + u32 int_pll_msk: 1; + u32 reserved: 31; + } bits; + } INT_PLL_MSK; + + union _0x208 { + u32 val; + struct _INT_PLL_CLR { + u32 int_pll_clr: 1; + u32 reserved: 31; + } bits; + } INT_PLL_CLR; + +}; + +void dsi_power_enable(struct dsi_context *ctx, int enable); +void dsi_video_mode(struct dsi_context *ctx); +void dsi_cmd_mode(struct dsi_context *ctx); +bool dsi_is_cmd_mode(struct dsi_context *ctx); +void dsi_rx_vcid(struct dsi_context *ctx, u8 vc); +void dsi_video_vcid(struct dsi_context *ctx, u8 vc); +void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode); +void dsi_dpi_color_coding(struct dsi_context *ctx, int coding); +void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle); +void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle); +void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle); +void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle); +void dsi_dpi_vact(struct dsi_context *ctx, u16 lines); +void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines); +void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines); +void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines); +void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable); +void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable); +void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable); +void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 no); +void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size); +void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size); +void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size); +void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable); +void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable); +void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable); +void dsi_set_packet_header(struct dsi_context *ctx, u8 vc, u8 type, + u8 wc_lsb, u8 wc_msb); +void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload); +u32 dsi_get_rx_payload(struct dsi_context *ctx); +void dsi_bta_en(struct dsi_context *ctx, int enable); +void dsi_eotp_rx_en(struct dsi_context *ctx, int enable); +void dsi_eotp_tx_en(struct dsi_context *ctx, int enable); +void dsi_ecc_rx_en(struct dsi_context *ctx, int enable); +void dsi_crc_rx_en(struct dsi_context *ctx, int enable); +bool dsi_is_bta_returned(struct dsi_context *ctx); +bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx); +bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx); +bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx); +bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx); +bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx); +void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle); +void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle); +void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle); +void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle); +void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle); +void dsi_nc_clk_en(struct dsi_context *ctx, int enable); +void dsi_tx_escape_division(struct dsi_context *ctx, u8 div); +void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div); +void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 count); +void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 count); +u32 dsi_int0_status(struct dsi_context *ctx); +u32 dsi_int1_status(struct dsi_context *ctx); +void dsi_int0_mask(struct dsi_context *ctx, u32 mask); +void dsi_int1_mask(struct dsi_context *ctx, u32 mask); + +#endif /* _DW_DSI_CTRL_H_ */ diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c new file mode 100644 index 0000000..b3f4624 --- /dev/null +++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c @@ -0,0 +1,276 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#include <linux/io.h> +#include <linux/init.h> +#include <linux/module.h> + +#include "dw_dsi_ctrl.h" +#include "dw_dsi_ctrl_ppi.h" +#include "sprd_dphy.h" + +/* + * Reset D-PHY module + */ +void dsi_phy_rstz(struct dphy_context *ctx, int level) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_reset_n = level; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +/* + * Power up/down D-PHY module + */ +void dsi_phy_shutdownz(struct dphy_context *ctx, int level) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_shutdown = level; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +/* + * Force D-PHY PLL to stay on while in ULPS + */ +void dsi_phy_force_pll(struct dphy_context *ctx, int force) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_force_pll = force; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_clk_txrequlps = en; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_clk_txexitulps = en; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_data_txrequlps = en; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_data_txexitulps = en; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +/* + * Configure minimum wait period for HS transmission request after a stop state + */ +void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_cycle) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + + writel(byte_cycle, &reg->PHY_MIN_STOP_TIME); +} + +/* + * Set number of active lanes + */ +void dsi_phy_datalane_en(struct dphy_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + + writel(ctx->lanes - 1, &reg->PHY_LANE_NUM_CONFIG); +} + +/* + * Enable clock lane module + */ +void dsi_phy_clklane_en(struct dphy_context *ctx, int en) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x78 phy_interface_ctrl; + + phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL); + phy_interface_ctrl.bits.rf_phy_clk_en = en; + + writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL); +} + +/* + * Request the PHY module to start transmission of high speed clock. + * This causes the clock lane to start transmitting DDR clock on the + * lane interconnect. + */ +void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int enable) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x74 phy_clk_lane_lp_ctrl; + + phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL); + phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = 0; + phy_clk_lane_lp_ctrl.bits.phy_clklane_tx_req_hs = enable; + + writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL); +} + +/* + * Get D-PHY PPI status + */ +u8 dsi_phy_is_pll_locked(struct dphy_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x9C phy_status; + + phy_status.val = readl(&reg->PHY_STATUS); + + return phy_status.bits.phy_lock; +} + +u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx) +{ + u8 state = 0; + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x9C phy_status; + + phy_status.val = readl(&reg->PHY_STATUS); + + if (phy_status.bits.phy_stopstate0lane) + state |= BIT(0); + if (phy_status.bits.phy_stopstate1lane) + state |= BIT(1); + if (phy_status.bits.phy_stopstate2lane) + state |= BIT(2); + if (phy_status.bits.phy_stopstate3lane) + state |= BIT(3); + + return state; +} + +u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x9C phy_status; + + phy_status.val = readl(&reg->PHY_STATUS); + + return phy_status.bits.phy_stopstateclklane; +} + +u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx) +{ + u8 state = 0; + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x9C phy_status; + + phy_status.val = readl(&reg->PHY_STATUS); + + if (!phy_status.bits.phy_ulpsactivenot0lane) + state |= BIT(0); + if (!phy_status.bits.phy_ulpsactivenot1lane) + state |= BIT(1); + if (!phy_status.bits.phy_ulpsactivenot2lane) + state |= BIT(2); + if (!phy_status.bits.phy_ulpsactivenot3lane) + state |= BIT(3); + + return state; +} + +u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0x9C phy_status; + + phy_status.val = readl(&reg->PHY_STATUS); + + return !phy_status.bits.phy_ulpsactivenotclk; +} + +void dsi_phy_test_clk(struct dphy_context *ctx, u8 value) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0xF0 phy_tst_ctrl0; + + phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0); + phy_tst_ctrl0.bits.phy_testclk = value; + + writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0); +} + +void dsi_phy_test_clr(struct dphy_context *ctx, u8 value) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0xF0 phy_tst_ctrl0; + + phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0); + phy_tst_ctrl0.bits.phy_testclr = value; + + writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0); +} + +void dsi_phy_test_en(struct dphy_context *ctx, u8 value) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0xF4 phy_tst_ctrl1; + + phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1); + phy_tst_ctrl1.bits.phy_testen = value; + + writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1); +} + +u8 dsi_phy_test_dout(struct dphy_context *ctx) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0xF4 phy_tst_ctrl1; + + phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1); + + return phy_tst_ctrl1.bits.phy_testdout; +} + +void dsi_phy_test_din(struct dphy_context *ctx, u8 data) +{ + struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase; + union _0xF4 phy_tst_ctrl1; + + phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1); + phy_tst_ctrl1.bits.phy_testdin = data; + + writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1); +} diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h new file mode 100644 index 0000000..eecdd71 --- /dev/null +++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#ifndef _DW_DSI_CTRL_PPI_H_ +#define _DW_DSI_CTRL_PPI_H_ + +#include "sprd_dphy.h" + +void dsi_phy_rstz(struct dphy_context *ctx, int level); +void dsi_phy_shutdownz(struct dphy_context *ctx, int level); +void dsi_phy_force_pll(struct dphy_context *ctx, int force); +void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en); +void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en); +void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en); +void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en); +void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_clk); +void dsi_phy_datalane_en(struct dphy_context *ctx); +void dsi_phy_clklane_en(struct dphy_context *ctx, int en); +void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int en); +u8 dsi_phy_is_pll_locked(struct dphy_context *ctx); +u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx); +u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx); +u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx); +u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx); +void dsi_phy_test_clk(struct dphy_context *ctx, u8 level); +void dsi_phy_test_clr(struct dphy_context *ctx, u8 level); +void dsi_phy_test_en(struct dphy_context *ctx, u8 level); +u8 dsi_phy_test_dout(struct dphy_context *ctx); +void dsi_phy_test_din(struct dphy_context *ctx, u8 data); +void dsi_phy_bist_en(struct dphy_context *ctx, int en); + +#endif /* _DW_DSI_CTRL_PPI_H_ */ \ No newline at end of file diff --git a/drivers/gpu/drm/sprd/megacores_pll.c b/drivers/gpu/drm/sprd/megacores_pll.c new file mode 100644 index 0000000..8527eea --- /dev/null +++ b/drivers/gpu/drm/sprd/megacores_pll.c @@ -0,0 +1,315 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#include <asm/div64.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/regmap.h> +#include <linux/string.h> + +#include "megacores_pll.h" + +#define L 0 +#define H 1 +#define CLK 0 +#define DATA 1 +#define INFINITY 0xffffffff +#define MIN_OUTPUT_FREQ (100) + +#define AVERAGE(a, b) (min(a, b) + abs((b) - (a)) / 2) + +/* sharkle */ +#define VCO_BAND_LOW 750 +#define VCO_BAND_MID 1100 +#define VCO_BAND_HIGH 1500 +#define PHY_REF_CLK 26000 + +static int dphy_calc_pll_param(struct dphy_pll *pll) +{ + const u32 khz = 1000; + const u32 mhz = 1000000; + const unsigned long long factor = 100; + unsigned long long tmp; + int i; + + pll->potential_fvco = pll->freq / khz; + pll->ref_clk = PHY_REF_CLK / khz; + + for (i = 0; i < 4; ++i) { + if (pll->potential_fvco >= VCO_BAND_LOW && + pll->potential_fvco <= VCO_BAND_HIGH) { + pll->fvco = pll->potential_fvco; + pll->out_sel = BIT(i); + break; + } + pll->potential_fvco <<= 1; + } + if (pll->fvco == 0) + return -EINVAL; + + if (pll->fvco >= VCO_BAND_LOW && pll->fvco <= VCO_BAND_MID) { + /* vco band control */ + pll->vco_band = 0x0; + /* low pass filter control */ + pll->lpf_sel = 1; + } else if (pll->fvco > VCO_BAND_MID && pll->fvco <= VCO_BAND_HIGH) { + pll->vco_band = 0x1; + pll->lpf_sel = 0; + } else + return -EINVAL; + + pll->nint = pll->fvco / pll->ref_clk; + tmp = pll->fvco * factor * mhz; + do_div(tmp, pll->ref_clk); + tmp = tmp - pll->nint * factor * mhz; + tmp *= BIT(20); + do_div(tmp, 100000000); + pll->kint = (u32)tmp; + pll->refin = 3; /* pre-divider bypass */ + pll->sdm_en = true; /* use fraction N PLL */ + pll->fdk_s = 0x1; /* fraction */ + pll->cp_s = 0x0; + pll->det_delay = 0x1; + + return 0; +} + +static void dphy_set_pll_reg(struct dphy_pll *pll, struct regmap *regmap) +{ + struct pll_reg *reg = &pll->reg; + u8 *val; + int i; + + u8 reg_addr[] = { + 0x03, 0x04, 0x06, 0x08, 0x09, + 0x0a, 0x0b, 0x0e, 0x0f + }; + + reg->_03.bits.prbs_bist = 1; + reg->_03.bits.en_lp_treot = true; + reg->_03.bits.lpf_sel = pll->lpf_sel; + reg->_03.bits.txfifo_bypass = 0; + reg->_04.bits.div = pll->div; + reg->_04.bits.masterof8lane = 1; + reg->_04.bits.cp_s = pll->cp_s; + reg->_04.bits.fdk_s = pll->fdk_s; + reg->_06.bits.nint = pll->nint; + reg->_08.bits.vco_band = pll->vco_band; + reg->_08.bits.sdm_en = pll->sdm_en; + reg->_08.bits.refin = pll->refin; + reg->_09.bits.kint_h = pll->kint >> 12; + reg->_0a.bits.kint_m = (pll->kint >> 4) & 0xff; + reg->_0b.bits.out_sel = pll->out_sel; + reg->_0b.bits.kint_l = pll->kint & 0xf; + reg->_0e.bits.pll_pu_byp = 0; + reg->_0e.bits.pll_pu = 0; + reg->_0e.bits.stopstate_sel = 1; + reg->_0f.bits.det_delay = pll->det_delay; + + val = (u8 *)&reg; + + for (i = 0; i < sizeof(reg_addr); ++i) { + regmap_write(regmap, reg_addr[i], val[i]); + DRM_DEBUG("%02x: %02x\n", reg_addr[i], val[i]); + } +} + +int dphy_pll_config(struct dphy_context *ctx) +{ + struct regmap *regmap = ctx->regmap; + struct dphy_pll *pll = ctx->pll; + int ret; + + pll->freq = ctx->freq; + + /* FREQ = 26M * (NINT + KINT / 2^20) / out_sel */ + ret = dphy_calc_pll_param(pll); + if (ret) { + DRM_ERROR("failed to calculate dphy pll parameters\n"); + return ret; + } + dphy_set_pll_reg(pll, regmap); + + return 0; +} + +static void dphy_set_timing_reg(struct regmap *regmap, int type, u8 val[]) +{ + switch (type) { + case REQUEST_TIME: + regmap_write(regmap, 0x31, val[CLK]); + regmap_write(regmap, 0x41, val[DATA]); + regmap_write(regmap, 0x51, val[DATA]); + regmap_write(regmap, 0x61, val[DATA]); + regmap_write(regmap, 0x71, val[DATA]); + + regmap_write(regmap, 0x90, val[CLK]); + regmap_write(regmap, 0xa0, val[DATA]); + regmap_write(regmap, 0xb0, val[DATA]); + regmap_write(regmap, 0xc0, val[DATA]); + regmap_write(regmap, 0xd0, val[DATA]); + break; + case PREPARE_TIME: + regmap_write(regmap, 0x32, val[CLK]); + regmap_write(regmap, 0x42, val[DATA]); + regmap_write(regmap, 0x52, val[DATA]); + regmap_write(regmap, 0x62, val[DATA]); + regmap_write(regmap, 0x72, val[DATA]); + + regmap_write(regmap, 0x91, val[CLK]); + regmap_write(regmap, 0xa1, val[DATA]); + regmap_write(regmap, 0xb1, val[DATA]); + regmap_write(regmap, 0xc1, val[DATA]); + regmap_write(regmap, 0xd1, val[DATA]); + break; + case ZERO_TIME: + regmap_write(regmap, 0x33, val[CLK]); + regmap_write(regmap, 0x43, val[DATA]); + regmap_write(regmap, 0x53, val[DATA]); + regmap_write(regmap, 0x63, val[DATA]); + regmap_write(regmap, 0x73, val[DATA]); + + regmap_write(regmap, 0x92, val[CLK]); + regmap_write(regmap, 0xa2, val[DATA]); + regmap_write(regmap, 0xb2, val[DATA]); + regmap_write(regmap, 0xc2, val[DATA]); + regmap_write(regmap, 0xd2, val[DATA]); + break; + case TRAIL_TIME: + regmap_write(regmap, 0x34, val[CLK]); + regmap_write(regmap, 0x44, val[DATA]); + regmap_write(regmap, 0x54, val[DATA]); + regmap_write(regmap, 0x64, val[DATA]); + regmap_write(regmap, 0x74, val[DATA]); + + regmap_write(regmap, 0x93, val[CLK]); + regmap_write(regmap, 0xa3, val[DATA]); + regmap_write(regmap, 0xb3, val[DATA]); + regmap_write(regmap, 0xc3, val[DATA]); + regmap_write(regmap, 0xd3, val[DATA]); + break; + case EXIT_TIME: + regmap_write(regmap, 0x36, val[CLK]); + regmap_write(regmap, 0x46, val[DATA]); + regmap_write(regmap, 0x56, val[DATA]); + regmap_write(regmap, 0x66, val[DATA]); + regmap_write(regmap, 0x76, val[DATA]); + + regmap_write(regmap, 0x95, val[CLK]); + regmap_write(regmap, 0xA5, val[DATA]); + regmap_write(regmap, 0xB5, val[DATA]); + regmap_write(regmap, 0xc5, val[DATA]); + regmap_write(regmap, 0xd5, val[DATA]); + break; + case CLKPOST_TIME: + regmap_write(regmap, 0x35, val[CLK]); + regmap_write(regmap, 0x94, val[CLK]); + break; + + /* the following just use default value */ + case SETTLE_TIME: + case TA_GET: + case TA_GO: + case TA_SURE: + break; + default: + break; + } +} + +void dphy_timing_config(struct dphy_context *ctx) +{ + struct regmap *regmap = ctx->regmap; + const u32 factor = 2; + const u32 scale = 100; + u32 t_ui, t_byteck, t_half_byteck; + u32 range[2], constant; + u8 val[2]; + u32 tmp = 0; + + /* t_ui: 1 ui, byteck: 8 ui, half byteck: 4 ui */ + t_ui = 1000 * scale / (ctx->freq / 1000); + t_byteck = t_ui << 3; + t_half_byteck = t_ui << 2; + constant = t_ui << 1; + + /* REQUEST_TIME: HS T-LPX: LP-01 + * For T-LPX, mipi spec defined min value is 50ns, + * but maybe it shouldn't be too small, because BTA, + * LP-10, LP-00, LP-01, all of this is related to T-LPX. + */ + range[L] = 50 * scale; + range[H] = INFINITY; + val[CLK] = DIV_ROUND_UP(range[L] * (factor << 1), t_byteck) - 2; + val[DATA] = val[CLK]; + dphy_set_timing_reg(regmap, REQUEST_TIME, val); + + /* PREPARE_TIME: HS sequence: LP-00 */ + range[L] = 38 * scale; + range[H] = 95 * scale; + tmp = AVERAGE(range[L], range[H]); + val[CLK] = DIV_ROUND_UP(AVERAGE(range[L], range[H]), + t_half_byteck) - 1; + range[L] = 40 * scale + 4 * t_ui; + range[H] = 85 * scale + 6 * t_ui; + tmp |= AVERAGE(range[L], range[H]) << 16; + val[DATA] = DIV_ROUND_UP(AVERAGE(range[L], range[H]), + t_half_byteck) - 1; + dphy_set_timing_reg(regmap, PREPARE_TIME, val); + + /* ZERO_TIME: HS-ZERO */ + range[L] = 300 * scale; + range[H] = INFINITY; + val[CLK] = DIV_ROUND_UP(range[L] * factor + (tmp & 0xffff) + - 525 * t_byteck / 100, t_byteck) - 2; + range[L] = 145 * scale + 10 * t_ui; + val[DATA] = DIV_ROUND_UP(range[L] * factor + + ((tmp >> 16) & 0xffff) - 525 * t_byteck / 100, + t_byteck) - 2; + dphy_set_timing_reg(regmap, ZERO_TIME, val); + + /* TRAIL_TIME: HS-TRAIL */ + range[L] = 60 * scale; + range[H] = INFINITY; + val[CLK] = DIV_ROUND_UP(range[L] * factor - constant, t_half_byteck); + range[L] = max(8 * t_ui, 60 * scale + 4 * t_ui); + val[DATA] = DIV_ROUND_UP(range[L] * 3 / 2 - constant, t_half_byteck) - 2; + dphy_set_timing_reg(regmap, TRAIL_TIME, val); + + /* EXIT_TIME: */ + range[L] = 100 * scale; + range[H] = INFINITY; + val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2; + val[DATA] = val[CLK]; + dphy_set_timing_reg(regmap, EXIT_TIME, val); + + /* CLKPOST_TIME: */ + range[L] = 60 * scale + 52 * t_ui; + range[H] = INFINITY; + val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2; + val[DATA] = val[CLK]; + dphy_set_timing_reg(regmap, CLKPOST_TIME, val); + + /* SETTLE_TIME: + * This time is used for receiver. So for transmitter, + * it can be ignored. + */ + + /* TA_GO: + * transmitter drives bridge state(LP-00) before releasing control, + * reg 0x1f default value: 0x04, which is good. + */ + + /* TA_SURE: + * After LP-10 state and before bridge state(LP-00), + * reg 0x20 default value: 0x01, which is good. + */ + + /* TA_GET: + * receiver drives Bridge state(LP-00) before releasing control + * reg 0x21 default value: 0x03, which is good. + */ +} diff --git a/drivers/gpu/drm/sprd/megacores_pll.h b/drivers/gpu/drm/sprd/megacores_pll.h new file mode 100644 index 0000000..0e82099 --- /dev/null +++ b/drivers/gpu/drm/sprd/megacores_pll.h @@ -0,0 +1,146 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#ifndef _MEGACORES_PLL_H_ +#define _MEGACORES_PLL_H_ + +#include "sprd_dphy.h" + +enum PLL_TIMING { + NONE, + REQUEST_TIME, + PREPARE_TIME, + SETTLE_TIME, + ZERO_TIME, + TRAIL_TIME, + EXIT_TIME, + CLKPOST_TIME, + TA_GET, + TA_GO, + TA_SURE, + TA_WAIT, +}; + +struct pll_reg { + union __reg_03__ { + struct __03 { + u8 prbs_bist: 1; + u8 en_lp_treot: 1; + u8 lpf_sel: 4; + u8 txfifo_bypass: 1; + u8 freq_hopping: 1; + } bits; + u8 val; + } _03; + union __reg_04__ { + struct __04 { + u8 div: 3; + u8 masterof8lane: 1; + u8 hop_trig: 1; + u8 cp_s: 2; + u8 fdk_s: 1; + } bits; + u8 val; + } _04; + union __reg_06__ { + struct __06 { + u8 nint: 7; + u8 mod_en: 1; + } bits; + u8 val; + } _06; + union __reg_07__ { + struct __07 { + u8 kdelta_h: 8; + } bits; + u8 val; + } _07; + union __reg_08__ { + struct __08 { + u8 vco_band: 1; + u8 sdm_en: 1; + u8 refin: 2; + u8 kdelta_l: 4; + } bits; + u8 val; + } _08; + union __reg_09__ { + struct __09 { + u8 kint_h: 8; + } bits; + u8 val; + } _09; + union __reg_0a__ { + struct __0a { + u8 kint_m: 8; + } bits; + u8 val; + } _0a; + union __reg_0b__ { + struct __0b { + u8 out_sel: 4; + u8 kint_l: 4; + } bits; + u8 val; + } _0b; + union __reg_0c__ { + struct __0c { + u8 kstep_h: 8; + } bits; + u8 val; + } _0c; + union __reg_0d__ { + struct __0d { + u8 kstep_m: 8; + } bits; + u8 val; + } _0d; + union __reg_0e__ { + struct __0e { + u8 pll_pu_byp: 1; + u8 pll_pu: 1; + u8 hsbist_len: 2; + u8 stopstate_sel: 1; + u8 kstep_l: 3; + } bits; + u8 val; + } _0e; + union __reg_0f__ { + struct __0f { + u8 det_delay:2; + u8 kdelta: 4; + u8 ldo0p4:2; + } bits; + u8 val; + } _0f; +}; + +struct dphy_pll { + u8 refin; /* Pre-divider control signal */ + u8 cp_s; /* 00: SDM_EN=1, 10: SDM_EN=0 */ + u8 fdk_s; /* PLL mode control: integer or fraction */ + u8 sdm_en; + u8 div; + u8 int_n; /* integer N PLL */ + u32 ref_clk; /* dphy reference clock, unit: MHz */ + u32 freq; /* panel config, unit: KHz */ + u32 fvco; + u32 potential_fvco; + u32 nint; /* sigma delta modulator NINT control */ + u32 kint; /* sigma delta modulator KINT control */ + u8 lpf_sel; /* low pass filter control */ + u8 out_sel; /* post divider control */ + u8 vco_band; /* vco range */ + u8 det_delay; + + struct pll_reg reg; +}; + +struct dphy_context; + +int dphy_pll_config(struct dphy_context *ctx); +void dphy_timing_config(struct dphy_context *ctx); + +#endif /* _MEGACORES_PLL_H_ */ \ No newline at end of file diff --git a/drivers/gpu/drm/sprd/sprd_dphy.c b/drivers/gpu/drm/sprd/sprd_dphy.c new file mode 100644 index 0000000..18abe78 --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dphy.c @@ -0,0 +1,335 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include "sprd_drm.h" +#include "sprd_dphy.h" +#include "dw_dsi_ctrl_ppi.h" + +int dphy_wait_pll_locked(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + int i; + + for (i = 0; i < 50000; i++) { + if (dsi_phy_is_pll_locked(ctx)) + return 0; + udelay(3); + } + + DRM_ERROR("error: dphy pll can not be locked\n"); + return -ETIMEDOUT; +} + +static int dphy_wait_datalane_stop_state(struct dphy_context *ctx, u8 mask) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_phy_is_stop_state_datalane(ctx) == mask) + return 0; + udelay(10); + } + + DRM_ERROR("wait datalane stop-state time out\n"); + return -ETIMEDOUT; +} + +static int dphy_wait_datalane_ulps_active(struct dphy_context *ctx, u8 mask) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_phy_is_ulps_active_datalane(ctx) == mask) + return 0; + udelay(10); + } + + DRM_ERROR("wait datalane ulps-active time out\n"); + return -ETIMEDOUT; +} + +static int dphy_wait_clklane_stop_state(struct dphy_context *ctx) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_phy_is_stop_state_clklane(ctx)) + return 0; + udelay(10); + } + + DRM_ERROR("wait clklane stop-state time out\n"); + return -ETIMEDOUT; +} + +static int dphy_wait_clklane_ulps_active(struct dphy_context *ctx) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_phy_is_ulps_active_clklane(ctx)) + return 0; + udelay(10); + } + + DRM_ERROR("wait clklane ulps-active time out\n"); + return -ETIMEDOUT; +} + +static int regmap_tst_io_write(void *context, u32 reg, u32 val) +{ + struct sprd_dphy *dphy = context; + struct dphy_context *ctx = &dphy->ctx; + + if (val > 0xff || reg > 0xff) + return -EINVAL; + + DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, val); + + dsi_phy_test_en(ctx, 1); + dsi_phy_test_din(ctx, reg); + dsi_phy_test_clk(ctx, 1); + dsi_phy_test_clk(ctx, 0); + dsi_phy_test_en(ctx, 0); + dsi_phy_test_din(ctx, val); + dsi_phy_test_clk(ctx, 1); + dsi_phy_test_clk(ctx, 0); + + return 0; +} + +static int regmap_tst_io_read(void *context, u32 reg, u32 *val) +{ + struct sprd_dphy *dphy = context; + struct dphy_context *ctx = &dphy->ctx; + int ret; + + if (reg > 0xff) + return -EINVAL; + + dsi_phy_test_en(ctx, 1); + dsi_phy_test_din(ctx, reg); + dsi_phy_test_clk(ctx, 1); + dsi_phy_test_clk(ctx, 0); + dsi_phy_test_en(ctx, 0); + + udelay(1); + + ret = dsi_phy_test_dout(ctx); + if (ret < 0) + return ret; + + *val = ret; + + DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, *val); + return 0; +} + +static struct regmap_bus regmap_tst_io = { + .reg_write = regmap_tst_io_write, + .reg_read = regmap_tst_io_read, +}; + +static const struct regmap_config byte_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regmap_config word_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int sprd_dphy_regmap_init(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + struct regmap *regmap; + + if (ctx->apbbase) + regmap = devm_regmap_init_mmio(&dphy->dev, + (void __iomem *)ctx->apbbase, &word_config); + else + regmap = devm_regmap_init(&dphy->dev, &regmap_tst_io, + dphy, &byte_config); + + if (IS_ERR(regmap)) { + DRM_ERROR("dphy regmap init failed\n"); + return PTR_ERR(regmap); + } + + ctx->regmap = regmap; + + return 0; +} + +void sprd_dphy_ulps_enter(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + u8 lane_mask = (1 << ctx->lanes) - 1; + + /* phy hs clk disable */ + dsi_phy_clk_hs_rqst(ctx, false); + dphy_wait_pll_locked(dphy); + + /* phy datalane ulps active */ + dsi_phy_datalane_ulps_rqst(ctx, 1); + dphy_wait_datalane_ulps_active(ctx, lane_mask); + dsi_phy_datalane_ulps_rqst(ctx, 0); + + /* phy clklane ulps active */ + dsi_phy_clklane_ulps_rqst(ctx, 1); + dphy_wait_clklane_ulps_active(ctx); + dsi_phy_clklane_ulps_rqst(ctx, 0); +} + +void sprd_dphy_ulps_exit(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + u8 lane_mask = (1 << ctx->lanes) - 1; + + dsi_phy_force_pll(ctx, true); + + /* phy clklane ulps exit */ + dsi_phy_clklane_ulps_exit(ctx, 1); + dphy_wait_clklane_stop_state(ctx); + dsi_phy_clklane_ulps_exit(ctx, 0); + + /* phy datelane ulps exit */ + dsi_phy_datalane_ulps_exit(ctx, 1); + dphy_wait_datalane_stop_state(ctx, lane_mask); + dsi_phy_datalane_ulps_exit(ctx, 0); + + dsi_phy_force_pll(ctx, false); +} + +int sprd_dphy_init(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + int ret; + + dsi_phy_rstz(ctx, 0); + dsi_phy_shutdownz(ctx, 0); + dsi_phy_clklane_en(ctx, 0); + + dsi_phy_test_clr(ctx, 0); + dsi_phy_test_clr(ctx, 1); + dsi_phy_test_clr(ctx, 0); + + dphy_pll_config(ctx); + dphy_timing_config(ctx); + + dsi_phy_shutdownz(ctx, 1); + dsi_phy_rstz(ctx, 1); + dsi_phy_stop_wait_time(ctx, 0x1C); + dsi_phy_clklane_en(ctx, 1); + dsi_phy_datalane_en(ctx); + + ret = dphy_wait_pll_locked(dphy); + if (ret) { + DRM_ERROR("sprd dphy initial failed\n"); + return ret; + } + + return 0; +} + +void sprd_dphy_fini(struct sprd_dphy *dphy) +{ + struct dphy_context *ctx = &dphy->ctx; + + dsi_phy_rstz(ctx, 0); + dsi_phy_shutdownz(ctx, 0); + dsi_phy_rstz(ctx, 1); +} + +static int sprd_dphy_context_init(struct sprd_dphy *dphy, + struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct dphy_context *ctx = &dphy->ctx; + struct resource *res; + + ctx->pll = devm_kzalloc(dev, sizeof(*ctx->pll), GFP_KERNEL); + if (!ctx->pll) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start, + resource_size(res)); + if (ctx->ctrlbase == 0) { + DRM_ERROR("failed to map dphy ctrl registers\n"); + return -ENXIO; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res) { + ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start, + resource_size(res)); + if (ctx->apbbase == 0) { + DRM_INFO("failed to map dphy apb registers\n"); + return -ENXIO; + } + } + + return 0; +} + +static const struct of_device_id dphy_match_table[] = { + { .compatible = "sprd,sharkl3-dsi-phy" }, + { /* sentinel */ }, +}; + +static int sprd_dphy_probe(struct platform_device *pdev) +{ + struct sprd_dphy *dphy; + struct device *dsi_dev; + int ret; + + dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL); + if (!dphy) + return -ENOMEM; + + dsi_dev = sprd_disp_pipe_get_input(&pdev->dev); + if (!dsi_dev) + return -ENODEV; + + ret = sprd_dphy_context_init(dphy, &pdev->dev); + if (ret) + return ret; + + ret = sprd_dphy_regmap_init(dphy); + if (ret) + return ret; + + platform_set_drvdata(pdev, dphy); + + return 0; +} + +struct platform_driver sprd_dphy_driver = { + .probe = sprd_dphy_probe, + .driver = { + .name = "sprd-dphy-drv", + .of_match_table = dphy_match_table, + } +}; + +MODULE_AUTHOR("Leon He leon.he@unisoc.com"); +MODULE_AUTHOR("Kevin Tang kevin.tang@unisoc.com"); +MODULE_DESCRIPTION("Unisoc MIPI DSI PHY driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/sprd/sprd_dphy.h b/drivers/gpu/drm/sprd/sprd_dphy.h new file mode 100644 index 0000000..ae858ba --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dphy.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#ifndef _SPRD_DPHY_H_ +#define _SPRD_DPHY_H_ + +#include <asm/types.h> +#include <linux/device.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/regmap.h> + +#include <drm/drm_print.h> + +#include "megacores_pll.h" + +struct dphy_context { + struct dphy_pll *pll; + struct regmap *regmap; + unsigned long ctrlbase; + unsigned long apbbase; + u32 freq; + u8 lanes; +}; + +struct sprd_dphy { + struct device dev; + struct dphy_context ctx; +}; + +int dphy_wait_pll_locked(struct sprd_dphy *dphy); +int sprd_dphy_init(struct sprd_dphy *dphy); +void sprd_dphy_fini(struct sprd_dphy *dphy); +void sprd_dphy_ulps_enter(struct sprd_dphy *dphy); +void sprd_dphy_ulps_exit(struct sprd_dphy *dphy); + +#endif /* _SPRD_DPHY_H_ */ diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c index f6aa47b..973fb36 100644 --- a/drivers/gpu/drm/sprd/sprd_dpu.c +++ b/drivers/gpu/drm/sprd/sprd_dpu.c @@ -322,6 +322,28 @@ static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc, return 0; }

+void sprd_dpu_run(struct sprd_dpu *dpu) +{ + struct dpu_context *ctx = &dpu->ctx; + + if (dpu->core->run) + dpu->core->run(ctx); + + drm_crtc_vblank_on(&dpu->crtc); +} + +void sprd_dpu_stop(struct sprd_dpu *dpu) +{ + struct dpu_context *ctx = &dpu->ctx; + + if (dpu->core->stop) + dpu->core->stop(ctx); + + drm_crtc_handle_vblank(&dpu->crtc); + drm_crtc_vblank_off(&dpu->crtc); +} + + static void sprd_dpu_init(struct sprd_dpu *dpu) { struct dpu_context *ctx = &dpu->ctx; diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h index 88f34ed..b6ad155 100644 --- a/drivers/gpu/drm/sprd/sprd_dpu.h +++ b/drivers/gpu/drm/sprd/sprd_dpu.h @@ -211,4 +211,7 @@ layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)

extern const struct dpu_core_ops dpu_r2p0_core_ops;

+void sprd_dpu_run(struct sprd_dpu *dpu); +void sprd_dpu_stop(struct sprd_dpu *dpu); + #endif diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c index ca93be2..a57e079 100644 --- a/drivers/gpu/drm/sprd/sprd_drm.c +++ b/drivers/gpu/drm/sprd/sprd_drm.c @@ -27,6 +27,46 @@ #define DRIVER_MAJOR 1 #define DRIVER_MINOR 0

+static struct device *sprd_disp_pipe_get_by_port(struct device *dev, int port) +{ + struct device_node *np = dev->of_node; + struct device_node *endpoint; + struct device_node *remote_node; + struct platform_device *remote_pdev; + + endpoint = of_graph_get_endpoint_by_regs(np, port, 0); + if (!endpoint) { + DRM_ERROR("%s/port%d/endpoint0 was not found\n", + np->full_name, port); + return NULL; + } + + remote_node = of_graph_get_remote_port_parent(endpoint); + if (!remote_node) { + DRM_ERROR("device node was not found by endpoint0\n"); + return NULL; + } + + remote_pdev = of_find_device_by_node(remote_node); + if (remote_pdev == NULL) { + DRM_ERROR("find %s platform device failed\n", + remote_node->full_name); + return NULL; + } + + return &remote_pdev->dev; +} + +struct device *sprd_disp_pipe_get_input(struct device *dev) +{ + return sprd_disp_pipe_get_by_port(dev, 1); +} + +struct device *sprd_disp_pipe_get_output(struct device *dev) +{ + return sprd_disp_pipe_get_by_port(dev, 0); +} + static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = { .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm, }; diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h index 85d4a8b..bfd374c 100644 --- a/drivers/gpu/drm/sprd/sprd_drm.h +++ b/drivers/gpu/drm/sprd/sprd_drm.h @@ -13,6 +13,8 @@ struct sprd_drm { struct drm_device drm; };

+struct device *sprd_disp_pipe_get_input(struct device *dev); +struct device *sprd_disp_pipe_get_output(struct device *dev); extern struct platform_driver sprd_dpu_driver;

#endif /* _SPRD_DRM_H_ */ diff --git a/drivers/gpu/drm/sprd/sprd_dsi.c b/drivers/gpu/drm/sprd/sprd_dsi.c new file mode 100644 index 0000000..09f6a9b --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dsi.c @@ -0,0 +1,1102 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#include <linux/component.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/of_graph.h> +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_of.h> +#include <drm/drm_probe_helper.h> + +#include "sprd_drm.h" +#include "sprd_dpu.h" +#include "sprd_dsi.h" +#include "sprd_dphy.h" +#include "dw_dsi_ctrl.h" +#include "dw_dsi_ctrl_ppi.h" + +#define encoder_to_dsi(encoder) \ + container_of(encoder, struct sprd_dsi, encoder) +#define host_to_dsi(host) \ + container_of(host, struct sprd_dsi, host) +#define connector_to_dsi(connector) \ + container_of(connector, struct sprd_dsi, connector) + +static int dsi_wait_tx_payload_fifo_empty(struct dsi_context *ctx) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_is_tx_payload_fifo_empty(ctx)) + return 0; + udelay(1); + } + + return -ETIMEDOUT; +} + +static int dsi_wait_tx_cmd_fifo_empty(struct dsi_context *ctx) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_is_tx_cmd_fifo_empty(ctx)) + return 0; + udelay(1); + } + + return -ETIMEDOUT; +} + +static int dsi_wait_rd_resp_completed(struct dsi_context *ctx) +{ + int i; + + for (i = 0; i < 10000; i++) { + if (dsi_is_bta_returned(ctx)) + return 0; + udelay(10); + } + + return -ETIMEDOUT; +} + +static u16 calc_bytes_per_pixel_x100(int coding) +{ + u16 Bpp_x100; + + switch (coding) { + case COLOR_CODE_16BIT_CONFIG1: + case COLOR_CODE_16BIT_CONFIG2: + case COLOR_CODE_16BIT_CONFIG3: + Bpp_x100 = 200; + break; + case COLOR_CODE_18BIT_CONFIG1: + case COLOR_CODE_18BIT_CONFIG2: + Bpp_x100 = 225; + break; + case COLOR_CODE_24BIT: + Bpp_x100 = 300; + break; + case COLOR_CODE_COMPRESSTION: + Bpp_x100 = 100; + break; + case COLOR_CODE_20BIT_YCC422_LOOSELY: + Bpp_x100 = 250; + break; + case COLOR_CODE_24BIT_YCC422: + Bpp_x100 = 300; + break; + case COLOR_CODE_16BIT_YCC422: + Bpp_x100 = 200; + break; + case COLOR_CODE_30BIT: + Bpp_x100 = 375; + break; + case COLOR_CODE_36BIT: + Bpp_x100 = 450; + break; + case COLOR_CODE_12BIT_YCC420: + Bpp_x100 = 150; + break; + default: + DRM_ERROR("invalid color coding"); + Bpp_x100 = 0; + break; + } + + return Bpp_x100; +} + +static u8 calc_video_size_step(int coding) +{ + u8 video_size_step; + + switch (coding) { + case COLOR_CODE_16BIT_CONFIG1: + case COLOR_CODE_16BIT_CONFIG2: + case COLOR_CODE_16BIT_CONFIG3: + case COLOR_CODE_18BIT_CONFIG1: + case COLOR_CODE_18BIT_CONFIG2: + case COLOR_CODE_24BIT: + case COLOR_CODE_COMPRESSTION: + return video_size_step = 1; + case COLOR_CODE_20BIT_YCC422_LOOSELY: + case COLOR_CODE_24BIT_YCC422: + case COLOR_CODE_16BIT_YCC422: + case COLOR_CODE_30BIT: + case COLOR_CODE_36BIT: + case COLOR_CODE_12BIT_YCC420: + return video_size_step = 2; + default: + DRM_ERROR("invalid color coding"); + return 0; + } +} + +static u16 round_video_size(int coding, u16 video_size) +{ + switch (coding) { + case COLOR_CODE_16BIT_YCC422: + case COLOR_CODE_24BIT_YCC422: + case COLOR_CODE_20BIT_YCC422_LOOSELY: + case COLOR_CODE_12BIT_YCC420: + /* round up active H pixels to a multiple of 2 */ + if ((video_size % 2) != 0) + video_size += 1; + break; + default: + break; + } + + return video_size; +} + +#define SPRD_MIPI_DSI_FMT_DSC 0xff +static u32 fmt_to_coding(u32 fmt) +{ + switch (fmt) { + case MIPI_DSI_FMT_RGB565: + return COLOR_CODE_16BIT_CONFIG1; + case MIPI_DSI_FMT_RGB666: + case MIPI_DSI_FMT_RGB666_PACKED: + return COLOR_CODE_18BIT_CONFIG1; + case MIPI_DSI_FMT_RGB888: + return COLOR_CODE_24BIT; + case SPRD_MIPI_DSI_FMT_DSC: + return COLOR_CODE_COMPRESSTION; + default: + DRM_ERROR("Unsupported format (%d)\n", fmt); + return COLOR_CODE_24BIT; + } +} + +#define ns_to_cycle(ns, byte_clk) \ + DIV_ROUND_UP((ns) * (byte_clk), 1000000) + +void sprd_dsi_init(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + u16 data_hs2lp, data_lp2hs, clk_hs2lp, clk_lp2hs; + u16 max_rd_time; + int div; + + dsi_power_enable(ctx, 0); + dsi_int0_mask(ctx, 0xffffffff); + dsi_int1_mask(ctx, 0xffffffff); + dsi_cmd_mode(ctx); + dsi_eotp_rx_en(ctx, 0); + dsi_eotp_tx_en(ctx, 0); + dsi_ecc_rx_en(ctx, 1); + dsi_crc_rx_en(ctx, 1); + dsi_bta_en(ctx, 1); + dsi_video_vcid(ctx, 0); + dsi_rx_vcid(ctx, 0); + + div = DIV_ROUND_UP(ctx->byte_clk, ctx->esc_clk); + dsi_tx_escape_division(ctx, div); + + max_rd_time = ns_to_cycle(ctx->max_rd_time, ctx->byte_clk); + dsi_max_read_time(ctx, max_rd_time); + + data_hs2lp = ns_to_cycle(ctx->data_hs2lp, ctx->byte_clk); + data_lp2hs = ns_to_cycle(ctx->data_lp2hs, ctx->byte_clk); + clk_hs2lp = ns_to_cycle(ctx->clk_hs2lp, ctx->byte_clk); + clk_lp2hs = ns_to_cycle(ctx->clk_lp2hs, ctx->byte_clk); + dsi_datalane_hs2lp_config(ctx, data_hs2lp); + dsi_datalane_lp2hs_config(ctx, data_lp2hs); + dsi_clklane_hs2lp_config(ctx, clk_hs2lp); + dsi_clklane_lp2hs_config(ctx, clk_lp2hs); + + dsi_power_enable(ctx, 1); +} + +/* + * Free up resources and shutdown host controller and PHY + */ +void sprd_dsi_fini(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + + dsi_int0_mask(ctx, 0xffffffff); + dsi_int1_mask(ctx, 0xffffffff); + dsi_power_enable(ctx, 0); +} + +/* + * If not in burst mode, it will compute the video and null packet sizes + * according to necessity. + * Configure timers for data lanes and/or clock lane to return to LP when + * bandwidth is not filled by data. + */ +int sprd_dsi_dpi_video(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + struct videomode *vm = &dsi->ctx.vm; + u16 Bpp_x100; + u16 video_size; + u32 ratio_x1000; + u16 null_pkt_size = 0; + u8 video_size_step; + u32 hs_to; + u32 total_bytes; + u32 bytes_per_chunk; + u32 chunks = 0; + u32 bytes_left = 0; + u32 chunk_overhead; + const u8 pkt_header = 6; + u8 coding; + int div; + u16 hline; + + coding = fmt_to_coding(ctx->format); + video_size = round_video_size(coding, vm->hactive); + Bpp_x100 = calc_bytes_per_pixel_x100(coding); + video_size_step = calc_video_size_step(coding); + ratio_x1000 = ctx->byte_clk * 1000 / (vm->pixelclock / 1000); + hline = vm->hactive + vm->hsync_len + vm->hfront_porch + + vm->hback_porch; + + dsi_power_enable(ctx, 0); + dsi_dpi_frame_ack_en(ctx, ctx->frame_ack_en); + dsi_dpi_color_coding(ctx, coding); + dsi_dpi_video_burst_mode(ctx, ctx->burst_mode); + dsi_dpi_sig_delay(ctx, 95 * hline * ratio_x1000 / 100000); + dsi_dpi_hline_time(ctx, hline * ratio_x1000 / 1000); + dsi_dpi_hsync_time(ctx, vm->hsync_len * ratio_x1000 / 1000); + dsi_dpi_hbp_time(ctx, vm->hback_porch * ratio_x1000 / 1000); + dsi_dpi_vact(ctx, vm->vactive); + dsi_dpi_vfp(ctx, vm->vfront_porch); + dsi_dpi_vbp(ctx, vm->vback_porch); + dsi_dpi_vsync(ctx, vm->vsync_len); + dsi_dpi_hporch_lp_en(ctx, 1); + dsi_dpi_vporch_lp_en(ctx, 1); + + hs_to = (hline * vm->vactive) + (2 * Bpp_x100) / 100; + for (div = 0x80; (div < hs_to) && (div > 2); div--) { + if ((hs_to % div) == 0) { + dsi_timeout_clock_division(ctx, div); + dsi_lp_rx_timeout(ctx, hs_to / div); + dsi_hs_tx_timeout(ctx, hs_to / div); + break; + } + } + + if (ctx->burst_mode == VIDEO_BURST_WITH_SYNC_PULSES) { + dsi_dpi_video_packet_size(ctx, video_size); + dsi_dpi_null_packet_size(ctx, 0); + dsi_dpi_chunk_num(ctx, 0); + } else { + /* non burst transmission */ + null_pkt_size = 0; + + /* bytes to be sent - first as one chunk */ + bytes_per_chunk = vm->hactive * Bpp_x100 / 100 + pkt_header; + + /* hline total bytes from the DPI interface */ + total_bytes = (vm->hactive + vm->hfront_porch) * + ratio_x1000 / ctx->lanes / 1000; + + /* check if the pixels actually fit on the DSI link */ + if (total_bytes < bytes_per_chunk) { + DRM_ERROR("current resolution can not be set\n"); + return -EINVAL; + } + + chunk_overhead = total_bytes - bytes_per_chunk; + + /* overhead higher than 1 -> enable multi packets */ + if (chunk_overhead > 1) { + + /* multi packets */ + for (video_size = video_size_step; + video_size < vm->hactive; + video_size += video_size_step) { + + if (vm->hactive * 1000 / video_size % 1000) + continue; + + chunks = vm->hactive / video_size; + bytes_per_chunk = Bpp_x100 * video_size / 100 + + pkt_header; + if (total_bytes >= (bytes_per_chunk * chunks)) { + bytes_left = total_bytes - + bytes_per_chunk * chunks; + break; + } + } + + /* prevent overflow (unsigned - unsigned) */ + if (bytes_left > (pkt_header * chunks)) { + null_pkt_size = (bytes_left - + pkt_header * chunks) / chunks; + /* avoid register overflow */ + if (null_pkt_size > 1023) + null_pkt_size = 1023; + } + + } else { + + /* single packet */ + chunks = 1; + + /* must be a multiple of 4 except 18 loosely */ + for (video_size = vm->hactive; + (video_size % video_size_step) != 0; + video_size++) + ; + } + + dsi_dpi_video_packet_size(ctx, video_size); + dsi_dpi_null_packet_size(ctx, null_pkt_size); + dsi_dpi_chunk_num(ctx, chunks); + } + + dsi_int0_mask(ctx, ctx->int0_mask); + dsi_int1_mask(ctx, ctx->int1_mask); + dsi_power_enable(ctx, 1); + + return 0; +} + +void sprd_dsi_edpi_video(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + const u32 fifo_depth = 1096; + const u32 word_length = 4; + u32 hactive = ctx->vm.hactive; + u32 Bpp_x100; + u32 max_fifo_len; + u8 coding; + + coding = fmt_to_coding(ctx->format); + Bpp_x100 = calc_bytes_per_pixel_x100(coding); + max_fifo_len = word_length * fifo_depth * 100 / Bpp_x100; + + dsi_power_enable(ctx, 0); + dsi_dpi_color_coding(ctx, coding); + dsi_tear_effect_ack_en(ctx, ctx->te_ack_en); + + if (max_fifo_len > hactive) + dsi_edpi_max_pkt_size(ctx, hactive); + else + dsi_edpi_max_pkt_size(ctx, max_fifo_len); + + dsi_int0_mask(ctx, ctx->int0_mask); + dsi_int1_mask(ctx, ctx->int1_mask); + dsi_power_enable(ctx, 1); +} + +/* + * Send a packet on the generic interface, + * this function has an active delay to wait for the buffer to clear. + * The delay is limited to: + * (param_length / 4) x DSIH_FIFO_ACTIVE_WAIT x register access time + * the controller restricts the sending of. + * + * This function will not be able to send Null and Blanking packets due to + * controller restriction + */ +int sprd_dsi_wr_pkt(struct sprd_dsi *dsi, u8 vc, u8 type, + const u8 *param, u16 len) +{ + struct dsi_context *ctx = &dsi->ctx; + u8 wc_lsbyte, wc_msbyte; + u32 payload; + int i, j, ret; + + if (vc > 3) + return -EINVAL; + + + /* 1st: for long packet, must config payload first */ + ret = dsi_wait_tx_payload_fifo_empty(ctx); + if (ret) { + DRM_ERROR("tx payload fifo is not empty\n"); + return ret; + } + + if (len > 2) { + for (i = 0, j = 0; i < len; i += j) { + payload = 0; + for (j = 0; (j < 4) && ((j + i) < (len)); j++) + payload |= param[i + j] << (j * 8); + + dsi_set_packet_payload(ctx, payload); + } + wc_lsbyte = len & 0xff; + wc_msbyte = len >> 8; + } else { + wc_lsbyte = (len > 0) ? param[0] : 0; + wc_msbyte = (len > 1) ? param[1] : 0; + } + + /* 2nd: then set packet header */ + ret = dsi_wait_tx_cmd_fifo_empty(ctx); + if (ret) { + DRM_ERROR("tx cmd fifo is not empty\n"); + return ret; + } + + dsi_set_packet_header(ctx, vc, type, wc_lsbyte, wc_msbyte); + + return 0; +} + +/* + * Send READ packet to peripheral using the generic interface, + * this will force command mode and stop video mode (because of BTA). + * + * This function has an active delay to wait for the buffer to clear, + * the delay is limited to 2 x DSIH_FIFO_ACTIVE_WAIT + * (waiting for command buffer, and waiting for receiving) + * @note this function will enable BTA + */ +int sprd_dsi_rd_pkt(struct sprd_dsi *dsi, u8 vc, u8 type, + u8 msb_byte, u8 lsb_byte, + u8 *buffer, u8 bytes_to_read) +{ + struct dsi_context *ctx = &dsi->ctx; + int i, ret; + int count = 0; + u32 temp; + + if (vc > 3) + return -EINVAL; + + /* 1st: send read command to peripheral */ + if (!dsi_is_tx_cmd_fifo_empty(ctx)) + return -EIO; + + dsi_set_packet_header(ctx, vc, type, lsb_byte, msb_byte); + + /* 2nd: wait peripheral response completed */ + ret = dsi_wait_rd_resp_completed(ctx); + if (ret) { + DRM_ERROR("wait read response time out\n"); + return ret; + } + + /* 3rd: get data from rx payload fifo */ + if (dsi_is_rx_payload_fifo_empty(ctx)) { + DRM_ERROR("rx payload fifo empty\n"); + return -EIO; + } + + for (i = 0; i < 100; i++) { + temp = dsi_get_rx_payload(ctx); + + if (count < bytes_to_read) + buffer[count++] = temp & 0xff; + if (count < bytes_to_read) + buffer[count++] = (temp >> 8) & 0xff; + if (count < bytes_to_read) + buffer[count++] = (temp >> 16) & 0xff; + if (count < bytes_to_read) + buffer[count++] = (temp >> 24) & 0xff; + + if (dsi_is_rx_payload_fifo_empty(ctx)) + return count; + else { + DRM_ERROR("read too many buffers\n"); + return -EIO; + } + } + + return 0; +} + +void sprd_dsi_set_work_mode(struct sprd_dsi *dsi, u8 mode) +{ + struct dsi_context *ctx = &dsi->ctx; + + if (mode == DSI_MODE_CMD) + dsi_cmd_mode(ctx); + else + dsi_video_mode(ctx); +} + +int sprd_dsi_get_work_mode(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + + if (dsi_is_cmd_mode(ctx)) + return DSI_MODE_CMD; + else + return DSI_MODE_VIDEO; +} + +void sprd_dsi_lp_cmd_enable(struct sprd_dsi *dsi, bool enable) +{ + struct dsi_context *ctx = &dsi->ctx; + + if (dsi_is_cmd_mode(ctx)) + dsi_cmd_mode_lp_cmd_en(ctx, enable); + else + dsi_video_mode_lp_cmd_en(ctx, enable); +} + +void sprd_dsi_state_reset(struct sprd_dsi *dsi) +{ + struct dsi_context *ctx = &dsi->ctx; + + dsi_power_enable(ctx, 0); + udelay(100); + dsi_power_enable(ctx, 1); +} + +u32 sprd_dsi_int_status(struct sprd_dsi *dsi, int index) +{ + struct dsi_context *ctx = &dsi->ctx; + u32 status; + + if (0 == index) + status = dsi_int0_status(ctx); + else if (1 == index) + status = dsi_int1_status(ctx); + else { + DRM_ERROR("invalid dsi IRQ index %d\n", index); + status = -EINVAL; + } + + return status; +} + +static void sprd_dsi_encoder_enable(struct drm_encoder *encoder) +{ + struct sprd_dsi *dsi = encoder_to_dsi(encoder); + struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc); + + if (dsi->ctx.enabled) { + DRM_ERROR("dsi is initialized\n"); + return; + } + + sprd_dsi_init(dsi); + if (dsi->ctx.work_mode == DSI_MODE_VIDEO) + sprd_dsi_dpi_video(dsi); + else + sprd_dsi_edpi_video(dsi); + + sprd_dphy_init(dsi->phy); + + sprd_dsi_lp_cmd_enable(dsi, true); + + if (dsi->panel) { + drm_panel_prepare(dsi->panel); + drm_panel_enable(dsi->panel); + } + + sprd_dsi_set_work_mode(dsi, dsi->ctx.work_mode); + sprd_dsi_state_reset(dsi); + + if (dsi->ctx.nc_clk_en) + dsi_nc_clk_en(&dsi->ctx, true); + else { + dsi_phy_clk_hs_rqst(&dsi->phy->ctx, true); + dphy_wait_pll_locked(dsi->phy); + } + + sprd_dpu_run(dpu); + + dsi->ctx.enabled = true; +} + +static void sprd_dsi_encoder_disable(struct drm_encoder *encoder) +{ + struct sprd_dsi *dsi = encoder_to_dsi(encoder); + struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc); + + if (!dsi->ctx.enabled) { + DRM_ERROR("dsi isn't initialized\n"); + return; + } + + sprd_dpu_stop(dpu); + sprd_dsi_set_work_mode(dsi, DSI_MODE_CMD); + sprd_dsi_lp_cmd_enable(dsi, true); + + if (dsi->panel) { + drm_panel_disable(dsi->panel); + sprd_dphy_ulps_enter(dsi->phy); + drm_panel_unprepare(dsi->panel); + } + + sprd_dphy_fini(dsi->phy); + sprd_dsi_fini(dsi); + + dsi->ctx.enabled = false; +} + +static void sprd_dsi_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adj_mode) +{ + struct sprd_dsi *dsi = encoder_to_dsi(encoder); + + DRM_DEBUG("%s() set mode: %s\n", __func__, dsi->mode->name); +} + +static int sprd_dsi_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + return 0; +} + +static const struct drm_encoder_helper_funcs sprd_encoder_helper_funcs = { + .atomic_check = sprd_dsi_encoder_atomic_check, + .mode_set = sprd_dsi_encoder_mode_set, + .enable = sprd_dsi_encoder_enable, + .disable = sprd_dsi_encoder_disable +}; + +static const struct drm_encoder_funcs sprd_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +static int sprd_dsi_encoder_init(struct drm_device *drm, + struct sprd_dsi *dsi) +{ + struct drm_encoder *encoder = &dsi->encoder; + struct device *dev = dsi->host.dev; + u32 crtc_mask; + int ret; + + crtc_mask = drm_of_find_possible_crtcs(drm, dev->of_node); + if (!crtc_mask) { + DRM_ERROR("failed to find crtc mask\n"); + return -EINVAL; + } + + DRM_DEBUG("find possible crtcs: 0x%08x\n", crtc_mask); + + encoder->possible_crtcs = crtc_mask; + ret = drm_encoder_init(drm, encoder, &sprd_encoder_funcs, + DRM_MODE_ENCODER_DSI, NULL); + if (ret) { + DRM_ERROR("failed to init dsi encoder\n"); + return ret; + } + + drm_encoder_helper_add(encoder, &sprd_encoder_helper_funcs); + + return 0; +} + +static int sprd_dsi_find_panel(struct sprd_dsi *dsi) +{ + struct device *dev = dsi->host.dev; + struct device_node *child, *lcds_node; + struct drm_panel *panel; + + /* search /lcds child node first */ + lcds_node = of_find_node_by_path("/lcds"); + for_each_child_of_node(lcds_node, child) { + panel = of_drm_find_panel(child); + if (panel) { + dsi->panel = panel; + return 0; + } + } + + /* + * If /lcds child node search failed, we search + * the child of dsi host node. + */ + for_each_child_of_node(dev->of_node, child) { + panel = of_drm_find_panel(child); + if (panel) { + dsi->panel = panel; + return 0; + } + } + + DRM_ERROR("of_drm_find_panel() failed\n"); + return -ENODEV; +} + +static int sprd_dsi_phy_attach(struct sprd_dsi *dsi) +{ + struct device *dev; + + dev = sprd_disp_pipe_get_output(&dsi->dev); + if (!dev) + return -ENODEV; + + dsi->phy = dev_get_drvdata(dev); + if (!dsi->phy) { + DRM_ERROR("dsi attach phy failed\n"); + return -EINVAL; + } + + dsi->phy->ctx.lanes = dsi->ctx.lanes; + dsi->phy->ctx.freq = dsi->ctx.byte_clk * 8; + + return 0; +} + +static int sprd_dsi_host_attach(struct mipi_dsi_host *host, + struct mipi_dsi_device *slave) +{ + struct sprd_dsi *dsi = host_to_dsi(host); + struct dsi_context *ctx = &dsi->ctx; + int ret; + + dsi->slave = slave; + ctx->lanes = slave->lanes; + ctx->format = slave->format; + ctx->byte_clk = slave->hs_rate / 8; + ctx->esc_clk = slave->lp_rate; + + if (slave->mode_flags & MIPI_DSI_MODE_VIDEO) + ctx->work_mode = DSI_MODE_VIDEO; + else + ctx->work_mode = DSI_MODE_CMD; + + if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) + ctx->burst_mode = VIDEO_BURST_WITH_SYNC_PULSES; + else if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) + ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_PULSES; + else + ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_EVENTS; + + if (slave->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) + ctx->nc_clk_en = true; + + ret = sprd_dsi_phy_attach(dsi); + if (ret) + return ret; + + ret = sprd_dsi_find_panel(dsi); + if (ret) + return ret; + + return 0; +} + +static int sprd_dsi_host_detach(struct mipi_dsi_host *host, + struct mipi_dsi_device *slave) +{ + /* do nothing */ + return 0; +} + +static ssize_t sprd_dsi_host_transfer(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct sprd_dsi *dsi = host_to_dsi(host); + const u8 *tx_buf = msg->tx_buf; + + if (msg->rx_buf && msg->rx_len) { + u8 lsb = (msg->tx_len > 0) ? tx_buf[0] : 0; + u8 msb = (msg->tx_len > 1) ? tx_buf[1] : 0; + + return sprd_dsi_rd_pkt(dsi, msg->channel, msg->type, + msb, lsb, msg->rx_buf, msg->rx_len); + } + + if (msg->tx_buf && msg->tx_len) + return sprd_dsi_wr_pkt(dsi, msg->channel, msg->type, + tx_buf, msg->tx_len); + + return 0; +} + +static const struct mipi_dsi_host_ops sprd_dsi_host_ops = { + .attach = sprd_dsi_host_attach, + .detach = sprd_dsi_host_detach, + .transfer = sprd_dsi_host_transfer, +}; + +static int sprd_dsi_host_init(struct sprd_dsi *dsi, struct device *dev) +{ + int ret; + + dsi->host.dev = dev; + dsi->host.ops = &sprd_dsi_host_ops; + + ret = mipi_dsi_host_register(&dsi->host); + if (ret) + DRM_ERROR("failed to register dsi host\n"); + + return ret; +} + +static int sprd_dsi_connector_get_modes(struct drm_connector *connector) +{ + struct sprd_dsi *dsi = connector_to_dsi(connector); + + return drm_panel_get_modes(dsi->panel, connector); +} + +static enum drm_mode_status +sprd_dsi_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct sprd_dsi *dsi = connector_to_dsi(connector); + + DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode)); + + if (mode->type & DRM_MODE_TYPE_PREFERRED) { + dsi->mode = mode; + drm_display_mode_to_videomode(dsi->mode, &dsi->ctx.vm); + } + + return MODE_OK; +} + +static struct drm_encoder * +sprd_dsi_connector_best_encoder(struct drm_connector *connector) +{ + struct sprd_dsi *dsi = connector_to_dsi(connector); + + return &dsi->encoder; +} + +static struct drm_connector_helper_funcs sprd_dsi_connector_helper_funcs = { + .get_modes = sprd_dsi_connector_get_modes, + .mode_valid = sprd_dsi_connector_mode_valid, + .best_encoder = sprd_dsi_connector_best_encoder, +}; + +static enum drm_connector_status +sprd_dsi_connector_detect(struct drm_connector *connector, bool force) +{ + struct sprd_dsi *dsi = connector_to_dsi(connector); + + if (dsi->panel) { + drm_panel_attach(dsi->panel, connector); + return connector_status_connected; + } + + return connector_status_disconnected; +} + +static void sprd_dsi_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs sprd_dsi_atomic_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = sprd_dsi_connector_detect, + .destroy = sprd_dsi_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int sprd_dsi_connector_init(struct drm_device *drm, struct sprd_dsi *dsi) +{ + struct drm_encoder *encoder = &dsi->encoder; + struct drm_connector *connector = &dsi->connector; + int ret; + + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(drm, connector, + &sprd_dsi_atomic_connector_funcs, + DRM_MODE_CONNECTOR_DSI); + if (ret) { + DRM_ERROR("drm_connector_init() failed\n"); + return ret; + } + + drm_connector_helper_add(connector, + &sprd_dsi_connector_helper_funcs); + + drm_connector_attach_encoder(connector, encoder); + + return 0; +} + +static int sprd_dsi_bridge_attach(struct sprd_dsi *dsi) +{ + struct drm_encoder *encoder = &dsi->encoder; + struct drm_bridge *bridge = dsi->bridge; + struct device *dev = dsi->host.dev; + struct device_node *bridge_node; + int ret; + + bridge_node = of_graph_get_remote_node(dev->of_node, 2, 0); + if (!bridge_node) + return 0; + + bridge = of_drm_find_bridge(bridge_node); + if (!bridge) { + DRM_ERROR("of_drm_find_bridge() failed\n"); + return -ENODEV; + } + dsi->bridge = bridge; + + ret = drm_bridge_attach(encoder, bridge, NULL, 0); + if (ret) { + DRM_ERROR("failed to attach external bridge\n"); + return ret; + } + + return 0; +} + +static irqreturn_t sprd_dsi_isr(int irq, void *data) +{ + u32 status = 0; + struct sprd_dsi *dsi = data; + + if (dsi->ctx.irq0 == irq) + status = sprd_dsi_int_status(dsi, 0); + else if (dsi->ctx.irq1 == irq) + status = sprd_dsi_int_status(dsi, 1); + + if (status & DSI_INT_STS_NEED_SOFT_RESET) + sprd_dsi_state_reset(dsi); + + return IRQ_HANDLED; +} + +static int sprd_dsi_bind(struct device *dev, struct device *master, void *data) +{ + struct drm_device *drm = data; + struct sprd_dsi *dsi = dev_get_drvdata(dev); + int ret; + + ret = sprd_dsi_encoder_init(drm, dsi); + if (ret) + goto cleanup_host; + + ret = sprd_dsi_connector_init(drm, dsi); + if (ret) + goto cleanup_encoder; + + ret = sprd_dsi_bridge_attach(dsi); + if (ret) + goto cleanup_connector; + + return 0; + +cleanup_connector: + drm_connector_cleanup(&dsi->connector); +cleanup_encoder: + drm_encoder_cleanup(&dsi->encoder); +cleanup_host: + mipi_dsi_host_unregister(&dsi->host); + return ret; +} + +static void sprd_dsi_unbind(struct device *dev, + struct device *master, void *data) +{ + /* do nothing */ + DRM_DEBUG("%s()\n", __func__); + +} + +static const struct component_ops dsi_component_ops = { + .bind = sprd_dsi_bind, + .unbind = sprd_dsi_unbind, +}; + +static int sprd_dsi_context_init(struct sprd_dsi *dsi, + struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct dsi_context *ctx = &dsi->ctx; + struct resource *res; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctx->base = (unsigned long)devm_ioremap(dev, res->start, + resource_size(res)); + if (ctx->base == 0) { + DRM_ERROR("failed to map dsi host registers\n"); + return -ENXIO; + } + + ctx->irq0 = platform_get_irq(pdev, 0); + if (ctx->irq0 > 0) { + ret = request_irq(ctx->irq0, sprd_dsi_isr, 0, "DSI_INT0", dsi); + if (ret) { + DRM_ERROR("failed to request dsi irq int0!\n"); + return -EINVAL; + } + } + + ctx->irq1 = platform_get_irq(pdev, 1); + if (ctx->irq1 > 0) { + ret = request_irq(ctx->irq1, sprd_dsi_isr, 0, "DSI_INT1", dsi); + if (ret) { + DRM_ERROR("failed to request dsi irq int1!\n"); + return -EINVAL; + } + } + + ctx->data_hs2lp = 120; + ctx->data_lp2hs = 500; + ctx->clk_hs2lp = 4; + ctx->clk_lp2hs = 15; + ctx->max_rd_time = 6000; + ctx->int0_mask = 0xffffffff; + ctx->int1_mask = 0xffffffff; + + return 0; +} + +static const struct of_device_id dsi_match_table[] = { + { .compatible = "sprd,sharkl3-dsi-host" }, + { /* sentinel */ }, +}; + +static int sprd_dsi_probe(struct platform_device *pdev) +{ + struct sprd_dsi *dsi; + int ret; + + dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL); + if (!dsi) { + DRM_ERROR("failed to allocate dsi data.\n"); + return -ENOMEM; + } + + ret = sprd_dsi_context_init(dsi, &pdev->dev); + if (ret) + return ret; + + ret = sprd_dsi_host_init(dsi, &pdev->dev); + if (ret) + return ret; + + platform_set_drvdata(pdev, dsi); + + return component_add(&pdev->dev, &dsi_component_ops); +} + +static int sprd_dsi_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &dsi_component_ops); + + return 0; +} + +struct platform_driver sprd_dsi_driver = { + .probe = sprd_dsi_probe, + .remove = sprd_dsi_remove, + .driver = { + .name = "sprd-dsi-drv", + .of_match_table = dsi_match_table, + }, +}; + +MODULE_AUTHOR("Leon He leon.he@unisoc.com"); +MODULE_AUTHOR("Kevin Tang kevin.tang@unisoc.com"); +MODULE_DESCRIPTION("Unisoc MIPI DSI HOST Controller Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/sprd/sprd_dsi.h b/drivers/gpu/drm/sprd/sprd_dsi.h new file mode 100644 index 0000000..ce9ff03 --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dsi.h @@ -0,0 +1,105 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 Unisoc Inc. + */ + +#ifndef __SPRD_DSI_H__ +#define __SPRD_DSI_H__ + +#include <linux/of.h> +#include <linux/device.h> +#include <video/videomode.h> + +#include <drm/drm_bridge.h> +#include <drm/drm_connector.h> +#include <drm/drm_encoder.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_print.h> +#include <drm/drm_panel.h> + +#define DSI_INT_STS_NEED_SOFT_RESET BIT(0) +#define DSI_INT_STS_NEED_HARD_RESET BIT(1) + +enum dsi_work_mode { + DSI_MODE_CMD = 0, + DSI_MODE_VIDEO +}; + +enum video_burst_mode { + VIDEO_NON_BURST_WITH_SYNC_PULSES = 0, + VIDEO_NON_BURST_WITH_SYNC_EVENTS, + VIDEO_BURST_WITH_SYNC_PULSES +}; + +enum dsi_color_coding { + COLOR_CODE_16BIT_CONFIG1 = 0, + COLOR_CODE_16BIT_CONFIG2, + COLOR_CODE_16BIT_CONFIG3, + COLOR_CODE_18BIT_CONFIG1, + COLOR_CODE_18BIT_CONFIG2, + COLOR_CODE_24BIT, + COLOR_CODE_20BIT_YCC422_LOOSELY, + COLOR_CODE_24BIT_YCC422, + COLOR_CODE_16BIT_YCC422, + COLOR_CODE_30BIT, + COLOR_CODE_36BIT, + COLOR_CODE_12BIT_YCC420, + COLOR_CODE_COMPRESSTION, + COLOR_CODE_MAX +}; + +struct dsi_context { + unsigned long base; + struct videomode vm; + bool enabled; + + u8 lanes; + u32 format; + u8 work_mode; + u8 burst_mode; + + int irq0; + int irq1; + u32 int0_mask; + u32 int1_mask; + + /* byte clock [KHz] */ + u32 byte_clk; + /* escape clock [KHz] */ + u32 esc_clk; + + /* maximum time (ns) for data lanes from HS to LP */ + u16 data_hs2lp; + /* maximum time (ns) for data lanes from LP to HS */ + u16 data_lp2hs; + /* maximum time (ns) for clk lanes from HS to LP */ + u16 clk_hs2lp; + /* maximum time (ns) for clk lanes from LP to HS */ + u16 clk_lp2hs; + /* maximum time (ns) for BTA operation - REQUIRED */ + u16 max_rd_time; + + /* is 18-bit loosely packets (valid only when BPP == 18) */ + bool is_18_loosely; + /* enable receiving frame ack packets - for video mode */ + bool frame_ack_en; + /* enable receiving tear effect ack packets - for cmd mode */ + bool te_ack_en; + /* enable non coninuous clock for energy saving */ + bool nc_clk_en; +}; + +struct sprd_dsi { + struct device dev; + struct mipi_dsi_host host; + struct mipi_dsi_device *slave; + struct drm_encoder encoder; + struct drm_connector connector; + struct drm_bridge *bridge; + struct drm_panel *panel; + struct drm_display_mode *mode; + struct sprd_dphy *phy; + struct dsi_context ctx; +}; + +#endif /* __SPRD_DSI_H__ */