Initializes Mipi DSI and sets up connects to ADV bridge
v2: removed license text upclassed dev_private, removed HAVE_IRQ. (Sam)
v3: Squashed all 59 commits to one
v4: review changes from Sam Ravnborg renamed dev_p to kmb
v5: corrected spellings v6: corrected checkpatch warnings v7: review changes Sam Ravnborg and Thomas Zimmerman removed unnecessary logs and defines and ifdef codes (Sam) split dphy_init_sequence smaller (Sam) removed redundant checks in kmb_dsi (Sam) changed kmb_dsi_init to drm_bridge_connector_init and drm_connector_attach_encoder to bridge's connector (Sam) v8: call drm_bridge_attach with DRM_BRIDGE_ATTACH_NO_CONNECTOR v9: renamed kmb_dsi_hw_init to kmb_dsi_mode_set (Daniel V)
Cc: Sam Ravnborg sam@ravnborg.org Signed-off-by: Anitha Chrisanthus anitha.chrisanthus@intel.com Reviewed-by: Bob Paauwe bob.j.paauwe@intel.com --- drivers/gpu/drm/kmb/kmb_dsi.c | 1524 +++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/kmb/kmb_dsi.h | 350 ++++++++++ 2 files changed, 1874 insertions(+) create mode 100644 drivers/gpu/drm/kmb/kmb_dsi.c create mode 100644 drivers/gpu/drm/kmb/kmb_dsi.h
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c new file mode 100644 index 0000000..0c00c7d --- /dev/null +++ b/drivers/gpu/drm/kmb/kmb_dsi.c @@ -0,0 +1,1524 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright © 2019-2020 Intel Corporation + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_bridge.h> +#include <drm/drm_bridge_connector.h> +#include <drm/drm_connector.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_print.h> +#include <drm/drm_probe_helper.h> + +#include "kmb_drv.h" +#include "kmb_dsi.h" +#include "kmb_regs.h" + +static struct mipi_dsi_host *dsi_host; +static struct mipi_dsi_device *dsi_device; + +/* Default setting is 1080p, 4 lanes */ +#define IMG_HEIGHT_LINES 1080 +#define IMG_WIDTH_PX 1920 +#define MIPI_TX_ACTIVE_LANES 4 + +struct mipi_tx_frame_section_cfg mipi_tx_frame0_sect_cfg = { + .width_pixels = IMG_WIDTH_PX, + .height_lines = IMG_HEIGHT_LINES, + .data_type = DSI_LP_DT_PPS_RGB888_24B, + .data_mode = MIPI_DATA_MODE1, + .dma_packed = 0 +}; + +struct mipi_tx_frame_cfg mipitx_frame0_cfg = { + .sections[0] = &mipi_tx_frame0_sect_cfg, + .sections[1] = NULL, + .sections[2] = NULL, + .sections[3] = NULL, + .vsync_width = 5, + .v_backporch = 36, + .v_frontporch = 4, + .hsync_width = 44, + .h_backporch = 148, + .h_frontporch = 88 +}; + +struct mipi_tx_dsi_cfg mipitx_dsi_cfg = { + .hfp_blank_en = 0, + .eotp_en = 0, + .lpm_last_vfp_line = 0, + .lpm_first_vsa_line = 0, + .sync_pulse_eventn = DSI_VIDEO_MODE_NO_BURST_EVENT, + .hfp_blanking = SEND_BLANK_PACKET, + .hbp_blanking = SEND_BLANK_PACKET, + .hsa_blanking = SEND_BLANK_PACKET, + .v_blanking = SEND_BLANK_PACKET, +}; + +struct mipi_ctrl_cfg mipi_tx_init_cfg = { + .active_lanes = MIPI_TX_ACTIVE_LANES, + .lane_rate_mbps = MIPI_TX_LANE_DATA_RATE_MBPS, + .ref_clk_khz = MIPI_TX_REF_CLK_KHZ, + .cfg_clk_khz = MIPI_TX_CFG_CLK_KHZ, + .tx_ctrl_cfg = { + .frames[0] = &mipitx_frame0_cfg, + .frames[1] = NULL, + .frames[2] = NULL, + .frames[3] = NULL, + .tx_dsi_cfg = &mipitx_dsi_cfg, + .line_sync_pkt_en = 0, + .line_counter_active = 0, + .frame_counter_active = 0, + .tx_always_use_hact = 1, + .tx_hact_wait_stop = 1, + } +}; + +struct mipi_hs_freq_range_cfg { + u16 default_bit_rate_mbps; + u8 hsfreqrange_code; +}; + +struct vco_params { + u32 freq; + u32 range; + u32 divider; +}; + +static struct vco_params vco_table[] = { + {52, 0x3f, 8}, + {80, 0x39, 8}, + {105, 0x2f, 4}, + {160, 0x29, 4}, + {210, 0x1f, 2}, + {320, 0x19, 2}, + {420, 0x0f, 1}, + {630, 0x09, 1}, + {1100, 0x03, 1}, + {0xffff, 0x01, 1}, +}; + +static struct mipi_hs_freq_range_cfg +mipi_hs_freq_range[MIPI_DPHY_DEFAULT_BIT_RATES] = { + {.default_bit_rate_mbps = 80, .hsfreqrange_code = 0x00}, + {.default_bit_rate_mbps = 90, .hsfreqrange_code = 0x10}, + {.default_bit_rate_mbps = 100, .hsfreqrange_code = 0x20}, + {.default_bit_rate_mbps = 110, .hsfreqrange_code = 0x30}, + {.default_bit_rate_mbps = 120, .hsfreqrange_code = 0x01}, + {.default_bit_rate_mbps = 130, .hsfreqrange_code = 0x11}, + {.default_bit_rate_mbps = 140, .hsfreqrange_code = 0x21}, + {.default_bit_rate_mbps = 150, .hsfreqrange_code = 0x31}, + {.default_bit_rate_mbps = 160, .hsfreqrange_code = 0x02}, + {.default_bit_rate_mbps = 170, .hsfreqrange_code = 0x12}, + {.default_bit_rate_mbps = 180, .hsfreqrange_code = 0x22}, + {.default_bit_rate_mbps = 190, .hsfreqrange_code = 0x32}, + {.default_bit_rate_mbps = 205, .hsfreqrange_code = 0x03}, + {.default_bit_rate_mbps = 220, .hsfreqrange_code = 0x13}, + {.default_bit_rate_mbps = 235, .hsfreqrange_code = 0x23}, + {.default_bit_rate_mbps = 250, .hsfreqrange_code = 0x33}, + {.default_bit_rate_mbps = 275, .hsfreqrange_code = 0x04}, + {.default_bit_rate_mbps = 300, .hsfreqrange_code = 0x14}, + {.default_bit_rate_mbps = 325, .hsfreqrange_code = 0x25}, + {.default_bit_rate_mbps = 350, .hsfreqrange_code = 0x35}, + {.default_bit_rate_mbps = 400, .hsfreqrange_code = 0x05}, + {.default_bit_rate_mbps = 450, .hsfreqrange_code = 0x16}, + {.default_bit_rate_mbps = 500, .hsfreqrange_code = 0x26}, + {.default_bit_rate_mbps = 550, .hsfreqrange_code = 0x37}, + {.default_bit_rate_mbps = 600, .hsfreqrange_code = 0x07}, + {.default_bit_rate_mbps = 650, .hsfreqrange_code = 0x18}, + {.default_bit_rate_mbps = 700, .hsfreqrange_code = 0x28}, + {.default_bit_rate_mbps = 750, .hsfreqrange_code = 0x39}, + {.default_bit_rate_mbps = 800, .hsfreqrange_code = 0x09}, + {.default_bit_rate_mbps = 850, .hsfreqrange_code = 0x19}, + {.default_bit_rate_mbps = 900, .hsfreqrange_code = 0x29}, + {.default_bit_rate_mbps = 1000, .hsfreqrange_code = 0x0A}, + {.default_bit_rate_mbps = 1050, .hsfreqrange_code = 0x1A}, + {.default_bit_rate_mbps = 1100, .hsfreqrange_code = 0x2A}, + {.default_bit_rate_mbps = 1150, .hsfreqrange_code = 0x3B}, + {.default_bit_rate_mbps = 1200, .hsfreqrange_code = 0x0B}, + {.default_bit_rate_mbps = 1250, .hsfreqrange_code = 0x1B}, + {.default_bit_rate_mbps = 1300, .hsfreqrange_code = 0x2B}, + {.default_bit_rate_mbps = 1350, .hsfreqrange_code = 0x3C}, + {.default_bit_rate_mbps = 1400, .hsfreqrange_code = 0x0C}, + {.default_bit_rate_mbps = 1450, .hsfreqrange_code = 0x1C}, + {.default_bit_rate_mbps = 1500, .hsfreqrange_code = 0x2C}, + {.default_bit_rate_mbps = 1550, .hsfreqrange_code = 0x3D}, + {.default_bit_rate_mbps = 1600, .hsfreqrange_code = 0x0D}, + {.default_bit_rate_mbps = 1650, .hsfreqrange_code = 0x1D}, + {.default_bit_rate_mbps = 1700, .hsfreqrange_code = 0x2E}, + {.default_bit_rate_mbps = 1750, .hsfreqrange_code = 0x3E}, + {.default_bit_rate_mbps = 1800, .hsfreqrange_code = 0x0E}, + {.default_bit_rate_mbps = 1850, .hsfreqrange_code = 0x1E}, + {.default_bit_rate_mbps = 1900, .hsfreqrange_code = 0x2F}, + {.default_bit_rate_mbps = 1950, .hsfreqrange_code = 0x3F}, + {.default_bit_rate_mbps = 2000, .hsfreqrange_code = 0x0F}, + {.default_bit_rate_mbps = 2050, .hsfreqrange_code = 0x40}, + {.default_bit_rate_mbps = 2100, .hsfreqrange_code = 0x41}, + {.default_bit_rate_mbps = 2150, .hsfreqrange_code = 0x42}, + {.default_bit_rate_mbps = 2200, .hsfreqrange_code = 0x43}, + {.default_bit_rate_mbps = 2250, .hsfreqrange_code = 0x44}, + {.default_bit_rate_mbps = 2300, .hsfreqrange_code = 0x45}, + {.default_bit_rate_mbps = 2350, .hsfreqrange_code = 0x46}, + {.default_bit_rate_mbps = 2400, .hsfreqrange_code = 0x47}, + {.default_bit_rate_mbps = 2450, .hsfreqrange_code = 0x48}, + {.default_bit_rate_mbps = 2500, .hsfreqrange_code = 0x49} +}; + +static enum drm_mode_status +kmb_dsi_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *mode_config = &dev->mode_config; + + if (mode->hdisplay < mode_config->min_width || + mode->hdisplay > mode_config->max_width) + return MODE_BAD_HVALUE; + + if (mode->vdisplay < mode_config->min_height || + mode->vdisplay > mode_config->max_height) + return MODE_BAD_VVALUE; + + return MODE_OK; +} + +static int kmb_dsi_get_modes(struct drm_connector *connector) +{ + int num_modes = 0; + + num_modes = drm_add_modes_noedid(connector, + connector->dev->mode_config.max_width, + connector->dev->mode_config.max_height); + + DRM_INFO("width=%d height=%d\n", + connector->dev->mode_config.max_width, + connector->dev->mode_config.max_height); + DRM_INFO("num modes=%d\n", num_modes); + + return num_modes; +} + +void kmb_dsi_host_unregister(void) +{ + mipi_dsi_host_unregister(dsi_host); + kfree(dsi_host); +} + +static void kmb_dsi_connector_destroy(struct drm_connector *connector) +{ + struct kmb_connector *kmb_connector = to_kmb_connector(connector); + + drm_connector_cleanup(connector); + kfree(kmb_connector); +} + +static void kmb_dsi_encoder_destroy(struct drm_encoder *encoder) +{ + struct kmb_dsi *kmb_dsi = to_kmb_dsi(encoder); + + if (!kmb_dsi) + return; + + kfree(kmb_dsi->dsi_host); + + drm_encoder_cleanup(encoder); + + kfree(kmb_dsi); + if (!dsi_device) + kfree(dsi_device); +} + +static const struct drm_encoder_funcs kmb_dsi_funcs = { + .destroy = kmb_dsi_encoder_destroy, +}; + +static const struct +drm_connector_helper_funcs kmb_dsi_connector_helper_funcs = { + .get_modes = kmb_dsi_get_modes, + .mode_valid = kmb_dsi_mode_valid, +}; + +static const struct drm_connector_funcs kmb_dsi_connector_funcs = { + .destroy = kmb_dsi_connector_destroy, + .fill_modes = drm_helper_probe_single_connector_modes, + .reset = drm_atomic_helper_connector_reset, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, +}; + +static ssize_t kmb_dsi_host_transfer(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + return 0; +} + +static int kmb_dsi_host_attach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dev) +{ + return 0; +} + +static int kmb_dsi_host_detach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dev) +{ + return 0; +} + +static const struct mipi_dsi_host_ops kmb_dsi_host_ops = { + .attach = kmb_dsi_host_attach, + .detach = kmb_dsi_host_detach, + .transfer = kmb_dsi_host_transfer, +}; + +static struct kmb_dsi_host *kmb_dsi_host_init(struct drm_device *drm, + struct kmb_dsi *kmb_dsi) +{ + struct kmb_dsi_host *host; + + host = kzalloc(sizeof(*host), GFP_KERNEL); + if (!host) + return NULL; + + host->base = dsi_host; + host->base->ops = &kmb_dsi_host_ops; + host->kmb_dsi = kmb_dsi; + + host->base->dev = drm->dev; + + dsi_device->host = host->base; + host->device = dsi_device; + return host; +} + +struct drm_bridge *kmb_dsi_host_bridge_init(struct device *dev) +{ + struct drm_bridge *bridge = NULL; + struct device_node *encoder_node; + + /* Create and register MIPI DSI host */ + if (!dsi_host) { + dsi_host = kzalloc(sizeof(*dsi_host), GFP_KERNEL); + if (!dsi_host) + return ERR_PTR(-ENOMEM); + + dsi_host->ops = &kmb_dsi_host_ops; + + if (!dsi_device) { + dsi_device = kzalloc(sizeof(*dsi_device), GFP_KERNEL); + if (!dsi_device) { + kfree(dsi_host); + return ERR_PTR(-ENOMEM); + } + } + + dsi_host->dev = dev; + mipi_dsi_host_register(dsi_host); + } + /* Find ADV7535 node and initialize it */ + encoder_node = of_parse_phandle(dev->of_node, "encoder-slave", 0); + + if (!encoder_node) { + DRM_ERROR("Failed to get bridge info from DT\n"); + return ERR_PTR(-EINVAL); + } + + /* Locate drm bridge from the hdmi encoder DT node */ + bridge = of_drm_find_bridge(encoder_node); + of_node_put(encoder_node); + if (!bridge) { + DRM_INFO("Wait for external bridge driver DT\n"); + return ERR_PTR(-EPROBE_DEFER); + } + return bridge; +} + +static u32 mipi_get_datatype_params(u32 data_type, u32 data_mode, + struct mipi_data_type_params *params) +{ + struct mipi_data_type_params data_type_param; + + switch (data_type) { + case DSI_LP_DT_PPS_YCBCR420_12B: + data_type_param.size_constraint_pixels = 2; + data_type_param.size_constraint_bytes = 3; + switch (data_mode) { + /* Case 0 not supported according to MDK */ + case 1: + case 2: + case 3: + data_type_param.pixels_per_pclk = 2; + data_type_param.bits_per_pclk = 24; + break; + default: + DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode); + return -EINVAL; + }; + break; + case DSI_LP_DT_PPS_YCBCR422_16B: + data_type_param.size_constraint_pixels = 2; + data_type_param.size_constraint_bytes = 4; + switch (data_mode) { + /* Case 0 and 1 not supported according + * to MDK + */ + case 2: + data_type_param.pixels_per_pclk = 1; + data_type_param.bits_per_pclk = 16; + break; + case 3: + data_type_param.pixels_per_pclk = 2; + data_type_param.bits_per_pclk = 32; + break; + default: + DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode); + return -EINVAL; + }; + break; + case DSI_LP_DT_LPPS_YCBCR422_20B: + case DSI_LP_DT_PPS_YCBCR422_24B: + data_type_param.size_constraint_pixels = 2; + data_type_param.size_constraint_bytes = 6; + switch (data_mode) { + /* Case 0 not supported according to MDK */ + case 1: + case 2: + case 3: + data_type_param.pixels_per_pclk = 1; + data_type_param.bits_per_pclk = 24; + break; + default: + DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode); + return -EINVAL; + }; + break; + case DSI_LP_DT_PPS_RGB565_16B: + data_type_param.size_constraint_pixels = 1; + data_type_param.size_constraint_bytes = 2; + switch (data_mode) { + case 0: + case 1: + data_type_param.pixels_per_pclk = 1; + data_type_param.bits_per_pclk = 16; + break; + case 2: + case 3: + data_type_param.pixels_per_pclk = 2; + data_type_param.bits_per_pclk = 32; + break; + default: + DRM_ERROR("DSI: Invalid data_mode %d\n", data_mode); + return -EINVAL; + }; + break; + case DSI_LP_DT_PPS_RGB666_18B: + data_type_param.size_constraint_pixels = 4; + data_type_param.size_constraint_bytes = 9; + data_type_param.bits_per_pclk = 18; + data_type_param.pixels_per_pclk = 1; + break; + case DSI_LP_DT_LPPS_RGB666_18B: + case DSI_LP_DT_PPS_RGB888_24B: + data_type_param.size_constraint_pixels = 1; + data_type_param.size_constraint_bytes = 3; + data_type_param.bits_per_pclk = 24; + data_type_param.pixels_per_pclk = 1; + break; + case DSI_LP_DT_PPS_RGB101010_30B: + data_type_param.size_constraint_pixels = 4; + data_type_param.size_constraint_bytes = 15; + data_type_param.bits_per_pclk = 30; + data_type_param.pixels_per_pclk = 1; + break; + default: + DRM_ERROR("DSI: Invalid data_type %d\n", data_type); + return -EINVAL; + }; + + *params = data_type_param; + return 0; +} + +static u32 compute_wc(u32 width_px, u8 size_constr_p, u8 size_constr_b) +{ + /* Calculate the word count for each long packet */ + return (((width_px / size_constr_p) * size_constr_b) & 0xffff); +} + +static u32 compute_unpacked_bytes(u32 wc, u8 bits_per_pclk) +{ + /* Number of PCLK cycles needed to transfer a line + * with each PCLK cycle, 4 Bytes are sent through the PPL module + */ + return ((wc * 8) / bits_per_pclk) * 4; +} + +static u32 mipi_tx_fg_section_cfg_regs(struct kmb_drm_private *kmb, + u8 frame_id, u8 section, + u32 height_lines, u32 unpacked_bytes, + struct mipi_tx_frame_sect_phcfg *ph_cfg) +{ + u32 cfg = 0; + u32 ctrl_no = MIPI_CTRL6; + u32 reg_adr; + + /* Frame section packet header */ + /* Word count bits [15:0] */ + cfg = (ph_cfg->wc & MIPI_TX_SECT_WC_MASK) << 0; + + /* Data type (bits [21:16]) */ + cfg |= ((ph_cfg->data_type & MIPI_TX_SECT_DT_MASK) + << MIPI_TX_SECT_DT_SHIFT); + + /* Virtual channel (bits [23:22]) */ + cfg |= ((ph_cfg->vchannel & MIPI_TX_SECT_VC_MASK) + << MIPI_TX_SECT_VC_SHIFT); + + /* Data mode (bits [24:25]) */ + cfg |= ((ph_cfg->data_mode & MIPI_TX_SECT_DM_MASK) + << MIPI_TX_SECT_DM_SHIFT); + if (ph_cfg->dma_packed) + cfg |= MIPI_TX_SECT_DMA_PACKED; + + drm_dbg(&kmb->drm, + "ctrl=%d frame_id=%d section=%d cfg=%x packed=%d\n", + ctrl_no, frame_id, section, cfg, ph_cfg->dma_packed); + kmb_write_mipi(kmb, + (MIPI_TXm_HS_FGn_SECTo_PH(ctrl_no, frame_id, section)), + cfg); + + /* Unpacked bytes */ + + /* There are 4 frame generators and each fg has 4 sections + * There are 2 registers for unpacked bytes (# bytes each + * section occupies in memory) + * REG_UNPACKED_BYTES0: [15:0]-BYTES0, [31:16]-BYTES1 + * REG_UNPACKED_BYTES1: [15:0]-BYTES2, [31:16]-BYTES3 + */ + reg_adr = + MIPI_TXm_HS_FGn_SECT_UNPACKED_BYTES0(ctrl_no, + frame_id) + (section / 2) * 4; + kmb_write_bits_mipi(kmb, reg_adr, (section % 2) * 16, 16, + unpacked_bytes); + drm_dbg(&kmb->drm, + "unpacked_bytes = %d, wordcount = %d\n", unpacked_bytes, + ph_cfg->wc); + + /* Line config */ + reg_adr = MIPI_TXm_HS_FGn_SECTo_LINE_CFG(ctrl_no, frame_id, section); + kmb_write_mipi(kmb, reg_adr, height_lines); + return 0; +} + +static u32 mipi_tx_fg_section_cfg(struct kmb_drm_private *kmb, + u8 frame_id, u8 section, + struct mipi_tx_frame_section_cfg *frame_scfg, + u32 *bits_per_pclk, u32 *wc) +{ + u32 ret = 0; + u32 unpacked_bytes; + struct mipi_data_type_params data_type_parameters; + struct mipi_tx_frame_sect_phcfg ph_cfg; + + ret = mipi_get_datatype_params(frame_scfg->data_type, + frame_scfg->data_mode, + &data_type_parameters); + if (ret) + return ret; + + /* Packet width has to be a multiple of the minimum packet width + * (in pixels) set for each data type + */ + if (frame_scfg->width_pixels % + data_type_parameters.size_constraint_pixels != 0) + return -EINVAL; + + *wc = compute_wc(frame_scfg->width_pixels, + data_type_parameters.size_constraint_pixels, + data_type_parameters.size_constraint_bytes); + unpacked_bytes = compute_unpacked_bytes(*wc, + data_type_parameters.bits_per_pclk); + ph_cfg.wc = *wc; + ph_cfg.data_mode = frame_scfg->data_mode; + ph_cfg.data_type = frame_scfg->data_type; + ph_cfg.dma_packed = frame_scfg->dma_packed; + ph_cfg.vchannel = frame_id; + + mipi_tx_fg_section_cfg_regs(kmb, frame_id, section, + frame_scfg->height_lines, + unpacked_bytes, &ph_cfg); + + /* Caller needs bits_per_clk for additional caluclations */ + *bits_per_pclk = data_type_parameters.bits_per_pclk; + + return 0; +} + +static void mipi_tx_fg_cfg_regs(struct kmb_drm_private *kmb, u8 frame_gen, + struct mipi_tx_frame_timing_cfg *fg_cfg) +{ + u32 sysclk; + u32 ppl_llp_ratio; + u32 ctrl_no = MIPI_CTRL6, reg_adr, val, offset; + + /* 500 Mhz system clock minus 50 to account for the difference in + * MIPI clock speed in RTL tests + */ + sysclk = kmb->sys_clk_mhz - 50; + + /* PPL-Pixel Packing Layer, LLP-Low Level Protocol + * Frame genartor timing parameters are clocked on the system clock, + * whereas as the equivalent parameters in the LLP blocks are clocked + * on LLP Tx clock from the D-PHY - BYTE clock + */ + + /* Multiply by 1000 to maintain precision */ + ppl_llp_ratio = ((fg_cfg->bpp / 8) * sysclk * 1000) / + ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes); + + drm_dbg(&kmb->drm, "ppl_llp_ratio=%d\n", ppl_llp_ratio); + drm_dbg(&kmb->drm, "bpp=%d sysclk=%d lane-rate=%d active-lanes=%d\n", + fg_cfg->bpp, sysclk, fg_cfg->lane_rate_mbps, + fg_cfg->active_lanes); + + /* Frame generator number of lines */ + reg_adr = MIPI_TXm_HS_FGn_NUM_LINES(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, fg_cfg->v_active); + + /* vsync width + * There are 2 registers for vsync width (VSA in lines for + * channels 0-3) + * REG_VSYNC_WIDTH0: [15:0]-VSA for channel0, [31:16]-VSA for channel1 + * REG_VSYNC_WIDTH1: [15:0]-VSA for channel2, [31:16]-VSA for channel3 + */ + offset = (frame_gen % 2) * 16; + reg_adr = MIPI_TXm_HS_VSYNC_WIDTHn(ctrl_no, frame_gen / 2); + kmb_write_bits_mipi(kmb, reg_adr, offset, 16, fg_cfg->vsync_width); + + /* vertical backporch (vbp) */ + reg_adr = MIPI_TXm_HS_V_BACKPORCHESn(ctrl_no, frame_gen / 2); + kmb_write_bits_mipi(kmb, reg_adr, offset, 16, fg_cfg->v_backporch); + + /* vertical frontporch (vfp) */ + reg_adr = MIPI_TXm_HS_V_FRONTPORCHESn(ctrl_no, frame_gen / 2); + kmb_write_bits_mipi(kmb, reg_adr, offset, 16, fg_cfg->v_frontporch); + + /* vertical active (vactive) */ + reg_adr = MIPI_TXm_HS_V_ACTIVEn(ctrl_no, frame_gen / 2); + kmb_write_bits_mipi(kmb, reg_adr, offset, 16, fg_cfg->v_active); + + /* hsync width */ + reg_adr = MIPI_TXm_HS_HSYNC_WIDTHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, + (fg_cfg->hsync_width * ppl_llp_ratio) / 1000); + + /* horizontal backporch (hbp) */ + reg_adr = MIPI_TXm_HS_H_BACKPORCHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, + (fg_cfg->h_backporch * ppl_llp_ratio) / 1000); + + /* horizontal frontporch (hfp) */ + reg_adr = MIPI_TXm_HS_H_FRONTPORCHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, + (fg_cfg->h_frontporch * ppl_llp_ratio) / 1000); + + /* horizontal active (ha) */ + reg_adr = MIPI_TXm_HS_H_ACTIVEn(ctrl_no, frame_gen); + + /* convert h_active which is wc in bytes to cycles */ + val = (fg_cfg->h_active * sysclk * 1000) / + ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes); + val /= 1000; + kmb_write_mipi(kmb, reg_adr, val); + + /* llp hsync width */ + reg_adr = MIPI_TXm_HS_LLP_HSYNC_WIDTHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, fg_cfg->hsync_width * (fg_cfg->bpp / 8)); + + /* llp h backporch */ + reg_adr = MIPI_TXm_HS_LLP_H_BACKPORCHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, fg_cfg->h_backporch * (fg_cfg->bpp / 8)); + + /* llp h frontporch */ + reg_adr = MIPI_TXm_HS_LLP_H_FRONTPORCHn(ctrl_no, frame_gen); + kmb_write_mipi(kmb, reg_adr, + fg_cfg->h_frontporch * (fg_cfg->bpp / 8)); +} + +static void mipi_tx_fg_cfg(struct kmb_drm_private *kmb, u8 frame_gen, + u8 active_lanes, u32 bpp, u32 wc, + u32 lane_rate_mbps, struct mipi_tx_frame_cfg *fg_cfg) +{ + u32 i, fg_num_lines = 0; + struct mipi_tx_frame_timing_cfg fg_t_cfg; + + /* Calculate the total frame generator number of + * lines based on it's active sections + */ + for (i = 0; i < MIPI_TX_FRAME_GEN_SECTIONS; i++) { + if (fg_cfg->sections[i]) + fg_num_lines += fg_cfg->sections[i]->height_lines; + } + + fg_t_cfg.bpp = bpp; + fg_t_cfg.lane_rate_mbps = lane_rate_mbps; + fg_t_cfg.hsync_width = fg_cfg->hsync_width; + fg_t_cfg.h_backporch = fg_cfg->h_backporch; + fg_t_cfg.h_frontporch = fg_cfg->h_frontporch; + fg_t_cfg.h_active = wc; + fg_t_cfg.vsync_width = fg_cfg->vsync_width; + fg_t_cfg.v_backporch = fg_cfg->v_backporch; + fg_t_cfg.v_frontporch = fg_cfg->v_frontporch; + fg_t_cfg.v_active = fg_num_lines; + fg_t_cfg.active_lanes = active_lanes; + + /* Apply frame generator timing setting */ + mipi_tx_fg_cfg_regs(kmb, frame_gen, &fg_t_cfg); +} + +static void mipi_tx_multichannel_fifo_cfg(struct kmb_drm_private *kmb, + u8 active_lanes, u8 vchannel_id) +{ + u32 fifo_size, fifo_rthreshold; + u32 ctrl_no = MIPI_CTRL6; + + /* Clear all mc fifo channel sizes and thresholds */ + kmb_write_mipi(kmb, MIPI_TX_HS_MC_FIFO_CTRL_EN, 0); + kmb_write_mipi(kmb, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC0, 0); + kmb_write_mipi(kmb, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC1, 0); + kmb_write_mipi(kmb, MIPI_TX_HS_MC_FIFO_RTHRESHOLD0, 0); + kmb_write_mipi(kmb, MIPI_TX_HS_MC_FIFO_RTHRESHOLD1, 0); + + fifo_size = ((active_lanes > MIPI_D_LANES_PER_DPHY) ? + MIPI_CTRL_4LANE_MAX_MC_FIFO_LOC : + MIPI_CTRL_2LANE_MAX_MC_FIFO_LOC) - 1; + + /* MC fifo size for virtual channels 0-3 + * REG_MC_FIFO_CHAN_ALLOC0: [8:0]-channel0, [24:16]-channel1 + * REG_MC_FIFO_CHAN_ALLOC1: [8:0]-2, [24:16]-channel3 + */ + SET_MC_FIFO_CHAN_ALLOC(kmb, ctrl_no, vchannel_id, fifo_size); + + /* Set threshold to half the fifo size, actual size=size*16 */ + fifo_rthreshold = ((fifo_size) * 8) & BIT_MASK_16; + SET_MC_FIFO_RTHRESHOLD(kmb, ctrl_no, vchannel_id, fifo_rthreshold); + + /* Enable the MC FIFO channel corresponding to the Virtual Channel */ + kmb_set_bit_mipi(kmb, MIPI_TXm_HS_MC_FIFO_CTRL_EN(ctrl_no), + vchannel_id); +} + +static void mipi_tx_ctrl_cfg(struct kmb_drm_private *kmb, u8 fg_id, + struct mipi_ctrl_cfg *ctrl_cfg) +{ + u32 sync_cfg = 0, ctrl = 0, fg_en; + u32 ctrl_no = MIPI_CTRL6; + + /* MIPI_TX_HS_SYNC_CFG */ + if (ctrl_cfg->tx_ctrl_cfg.line_sync_pkt_en) + sync_cfg |= LINE_SYNC_PKT_ENABLE; + if (ctrl_cfg->tx_ctrl_cfg.frame_counter_active) + sync_cfg |= FRAME_COUNTER_ACTIVE; + if (ctrl_cfg->tx_ctrl_cfg.line_counter_active) + sync_cfg |= LINE_COUNTER_ACTIVE; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->v_blanking) + sync_cfg |= DSI_V_BLANKING; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hsa_blanking) + sync_cfg |= DSI_HSA_BLANKING; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hbp_blanking) + sync_cfg |= DSI_HBP_BLANKING; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hfp_blanking) + sync_cfg |= DSI_HFP_BLANKING; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->sync_pulse_eventn) + sync_cfg |= DSI_SYNC_PULSE_EVENTN; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->lpm_first_vsa_line) + sync_cfg |= DSI_LPM_FIRST_VSA_LINE; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->lpm_last_vfp_line) + sync_cfg |= DSI_LPM_LAST_VFP_LINE; + + /* Enable frame generator */ + fg_en = 1 << fg_id; + sync_cfg |= FRAME_GEN_EN(fg_en); + + if (ctrl_cfg->tx_ctrl_cfg.tx_always_use_hact) + sync_cfg |= ALWAYS_USE_HACT(fg_en); + if (ctrl_cfg->tx_ctrl_cfg.tx_hact_wait_stop) + sync_cfg |= HACT_WAIT_STOP(fg_en); + + drm_dbg(&kmb->drm, "sync_cfg=%d fg_en=%d\n", sync_cfg, fg_en); + + /* MIPI_TX_HS_CTRL */ + + /* type:DSI, source:LCD */ + ctrl = HS_CTRL_EN | TX_SOURCE; + ctrl |= LCD_VC(fg_id); + ctrl |= ACTIVE_LANES(ctrl_cfg->active_lanes - 1); + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->eotp_en) + ctrl |= DSI_EOTP_EN; + if (ctrl_cfg->tx_ctrl_cfg.tx_dsi_cfg->hfp_blank_en) + ctrl |= DSI_CMD_HFP_EN; + + /*67 ns stop time */ + ctrl |= HSEXIT_CNT(0x43); + + kmb_write_mipi(kmb, MIPI_TXm_HS_SYNC_CFG(ctrl_no), sync_cfg); + kmb_write_mipi(kmb, MIPI_TXm_HS_CTRL(ctrl_no), ctrl); +} + +static u32 mipi_tx_init_cntrl(struct kmb_drm_private *kmb, + struct mipi_ctrl_cfg *ctrl_cfg) +{ + u32 ret = 0; + u8 active_vchannels = 0; + u8 frame_id, sect; + u32 bits_per_pclk = 0; + u32 word_count = 0; + struct mipi_tx_frame_cfg *frame; + + /* This is the order to initialize MIPI TX: + * 1. set frame section parameters + * 2. set frame specific parameters + * 3. connect lcd to mipi + * 4. multi channel fifo cfg + * 5. set mipitxcctrlcfg + */ + + for (frame_id = 0; frame_id < 4; frame_id++) { + frame = ctrl_cfg->tx_ctrl_cfg.frames[frame_id]; + + /* Find valid frame, assume only one valid frame */ + if (!frame) + continue; + + /* Frame Section configuration */ + /* TODO - assume there is only one valid section in a frame, + * so bits_per_pclk and word_count are only set once + */ + for (sect = 0; sect < MIPI_CTRL_VIRTUAL_CHANNELS; sect++) { + if (!frame->sections[sect]) + continue; + + ret = mipi_tx_fg_section_cfg(kmb, frame_id, sect, + frame->sections[sect], + &bits_per_pclk, + &word_count); + if (ret) + return ret; + } + + /* Set frame specific parameters */ + mipi_tx_fg_cfg(kmb, frame_id, ctrl_cfg->active_lanes, + bits_per_pclk, word_count, + ctrl_cfg->lane_rate_mbps, frame); + + active_vchannels++; + + /* Stop iterating as only one virtual channel + * shall be used for LCD connection + */ + break; + } + + if (active_vchannels == 0) + return -EINVAL; + /* Multi-Channel FIFO Configuration */ + mipi_tx_multichannel_fifo_cfg(kmb, ctrl_cfg->active_lanes, frame_id); + + /* Frame Generator Enable */ + mipi_tx_ctrl_cfg(kmb, frame_id, ctrl_cfg); + + return ret; +} + +static void test_mode_send(struct kmb_drm_private *kmb, u32 dphy_no, + u32 test_code, u32 test_data) +{ + /* Steps to send test code: + * - set testclk HIGH + * - set testdin with test code + * - set testen HIGH + * - set testclk LOW + * - set testen LOW + */ + + /* Set testclk high */ + SET_DPHY_TEST_CTRL1_CLK(kmb, dphy_no); + + /* Set testdin */ + SET_TEST_DIN0_3(kmb, dphy_no, test_code); + + /* Set testen high */ + SET_DPHY_TEST_CTRL1_EN(kmb, dphy_no); + + /* Set testclk low */ + CLR_DPHY_TEST_CTRL1_CLK(kmb, dphy_no); + + /* Set testen low */ + CLR_DPHY_TEST_CTRL1_EN(kmb, dphy_no); + + if (test_code) { + /* Steps to send test data: + * - set testen LOW + * - set testclk LOW + * - set testdin with data + * - set testclk HIGH + */ + + /* Set testen low */ + CLR_DPHY_TEST_CTRL1_EN(kmb, dphy_no); + + /* Set testclk low */ + CLR_DPHY_TEST_CTRL1_CLK(kmb, dphy_no); + + /* Set data in testdin */ + kmb_write_mipi(kmb, + DPHY_TEST_DIN0_3 + ((dphy_no / 0x4) * 0x4), + test_data << ((dphy_no % 4) * 8)); + + /* Set testclk high */ + SET_DPHY_TEST_CTRL1_CLK(kmb, dphy_no); + } +} + +static inline void + set_test_mode_src_osc_freq_target_low_bits(struct kmb_drm_private *kmb, + u32 dphy_no, + u32 freq) +{ + /* Typical rise/fall time=166, refer Table 1207 databook, + * sr_osc_freq_target[7:0] + */ + test_mode_send(kmb, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, + (freq & 0x7f)); +} + +static inline void + set_test_mode_src_osc_freq_target_hi_bits(struct kmb_drm_private *kmb, + u32 dphy_no, + u32 freq) +{ + u32 data; + + /* Flag this as high nibble */ + data = ((freq >> 6) & 0x1f) | (1 << 7); + + /* Typical rise/fall time=166, refer Table 1207 databook, + * sr_osc_freq_target[11:7] + */ + test_mode_send(kmb, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, data); +} + +static void mipi_tx_get_vco_params(struct vco_params *vco) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(vco_table); i++) { + if (vco->freq < vco_table[i].freq) { + *vco = vco_table[i]; + return; + } + } + + WARN_ONCE(1, "Invalid vco freq = %u for PLL setup\n", vco->freq); +} + +static void mipi_tx_pll_setup(struct kmb_drm_private *kmb, u32 dphy_no, + u32 ref_clk_mhz, u32 target_freq_mhz) +{ + u32 best_n = 0, best_m = 0; + u32 n = 0, m = 0, div = 0, delta, freq = 0, t_freq; + u32 best_freq_delta = 3000; + + /* pll_ref_clk: - valid range: 2~64 MHz; Typically 24 MHz + * Fvco: - valid range: 320~1250 MHz (Gen3 D-PHY) + * Fout: - valid range: 40~1250 MHz (Gen3 D-PHY) + * n: - valid range [0 15] + * N: - N = n + 1 + * -valid range: [1 16] + * -conditions: - (pll_ref_clk / N) >= 2 MHz + * -(pll_ref_clk / N) <= 8 MHz + * m: valid range [62 623] + * M: - M = m + 2 + * -valid range [64 625] + * -Fvco = (M/N) * pll_ref_clk + */ + struct vco_params vco_p = { + .range = 0, + .divider = 1, + }; + + vco_p.freq = target_freq_mhz; + mipi_tx_get_vco_params(&vco_p); + + /* Search pll n parameter */ + for (n = PLL_N_MIN; n <= PLL_N_MAX; n++) { + /* Calculate the pll input frequency division ratio + * multiply by 1000 for precision - + * no floating point, add n for rounding + */ + div = ((ref_clk_mhz * 1000) + n) / (n + 1); + + /* Found a valid n parameter */ + if ((div < 2000 || div > 8000)) + continue; + + /* Search pll m parameter */ + for (m = PLL_M_MIN; m <= PLL_M_MAX; m++) { + /* Calculate the Fvco(DPHY PLL output frequency) + * using the current n,m params + */ + freq = div * (m + 2); + freq /= 1000; + + /* Trim the potential pll freq to max supported */ + if (freq > PLL_FVCO_MAX) + continue; + + delta = abs(freq - target_freq_mhz); + + /* Select the best (closest to target pll freq) + * n,m parameters so far + */ + if (delta < best_freq_delta) { + best_n = n; + best_m = m; + best_freq_delta = delta; + } + } + } + + /* Program vco_cntrl parameter + * PLL_VCO_Control[5:0] = pll_vco_cntrl_ovr, + * PLL_VCO_Control[6] = pll_vco_cntrl_ovr_en + */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_VCO_CTRL, (vco_p.range + | (1 << 6))); + + /* Program m, n pll parameters */ + drm_dbg(&kmb->drm, "m = %d n = %d\n", best_m, best_n); + + /* PLL_Input_Divider_Ratio[3:0] = pll_n_ovr */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_INPUT_DIVIDER, + (best_n & 0x0f)); + + /* m - low nibble PLL_Loop_Divider_Ratio[4:0] + * pll_m_ovr[4:0] + */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_FEEDBACK_DIVIDER, + (best_m & 0x1f)); + + /* m - high nibble PLL_Loop_Divider_Ratio[4:0] + * pll_m_ovr[9:5] + */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_FEEDBACK_DIVIDER, + ((best_m >> 5) & 0x1f) | PLL_FEEDBACK_DIVIDER_HIGH); + + /* Enable overwrite of n,m parameters :pll_n_ovr_en, pll_m_ovr_en */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_OUTPUT_CLK_SEL, + (PLL_N_OVR_EN | PLL_M_OVR_EN)); + + /* Program Charge-Pump parameters */ + + /* pll_prop_cntrl-fixed values for prop_cntrl from DPHY doc */ + t_freq = target_freq_mhz * vco_p.divider; + test_mode_send(kmb, dphy_no, + TEST_CODE_PLL_PROPORTIONAL_CHARGE_PUMP_CTRL, + ((t_freq > 1150) ? 0x0C : 0x0B)); + + /* pll_int_cntrl-fixed value for int_cntrl from DPHY doc */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_INTEGRAL_CHARGE_PUMP_CTRL, + 0x00); + + /* pll_gmp_cntrl-fixed value for gmp_cntrl from DPHY doci */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_GMP_CTRL, 0x10); + + /* pll_cpbias_cntrl-fixed value for cpbias_cntrl from DPHY doc */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_CHARGE_PUMP_BIAS, 0x10); + + /* pll_th1 -Lock Detector Phase error threshold, + * document gives fixed value + */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_PHASE_ERR_CTRL, 0x02); + + /* PLL Lock Configuration */ + + /* pll_th2 - Lock Filter length, document gives fixed value */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_LOCK_FILTER, 0x60); + + /* pll_th3- PLL Unlocking filter, document gives fixed value */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_UNLOCK_FILTER, 0x03); + + /* pll_lock_sel-PLL Lock Detector Selection, + * document gives fixed value + */ + test_mode_send(kmb, dphy_no, TEST_CODE_PLL_LOCK_DETECTOR, 0x02); +} + +static void set_slewrate_gt_1500(struct kmb_drm_private *kmb, u32 dphy_no) +{ + u32 test_code = 0, test_data = 0; + /* Bypass slew rate calibration algorithm + * bits[1:0} srcal_en_ovr_en, srcal_en_ovr + */ + test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL; + test_data = 0x02; + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Disable slew rate calibration */ + test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL; + test_data = 0x00; + test_mode_send(kmb, dphy_no, test_code, test_data); +} + +static void set_slewrate_gt_1000(struct kmb_drm_private *kmb, u32 dphy_no) +{ + u32 test_code = 0, test_data = 0; + + /* BitRate: > 1 Gbps && <= 1.5 Gbps: - slew rate control ON + * typical rise/fall times: 166 ps + */ + + /* Do not bypass slew rate calibration algorithm + * bits[1:0}=srcal_en_ovr_en, srcal_en_ovr, bit[6]=sr_range + */ + test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL; + test_data = (0x03 | (1 << 6)); + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Enable slew rate calibration */ + test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL; + test_data = 0x01; + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Set sr_osc_freq_target[6:0] low nibble + * typical rise/fall time=166, refer Table 1207 databook + */ + test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES; + test_data = (0x72f & 0x7f); + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Set sr_osc_freq_target[11:7] high nibble + * Typical rise/fall time=166, refer Table 1207 databook + */ + test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES; + test_data = ((0x72f >> 6) & 0x1f) | (1 << 7); + test_mode_send(kmb, dphy_no, test_code, test_data); +} + +static void set_slewrate_lt_1000(struct kmb_drm_private *kmb, u32 dphy_no) +{ + u32 test_code = 0, test_data = 0; + + /* lane_rate_mbps <= 1000 Mbps + * BitRate: <= 1 Gbps: + * - slew rate control ON + * - typical rise/fall times: 225 ps + */ + + /* Do not bypass slew rate calibration algorithm */ + test_code = TEST_CODE_SLEW_RATE_OVERRIDE_CTRL; + test_data = (0x03 | (1 << 6)); + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Enable slew rate calibration */ + test_code = TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL; + test_data = 0x01; + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Typical rise/fall time=255, refer Table 1207 databook */ + test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES; + test_data = (0x523 & 0x7f); + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Set sr_osc_freq_target[11:7] high nibble */ + test_code = TEST_CODE_SLEW_RATE_DDL_CYCLES; + test_data = ((0x523 >> 6) & 0x1f) | (1 << 7); + test_mode_send(kmb, dphy_no, test_code, test_data); +} + +static void setup_pll(struct kmb_drm_private *kmb, u32 dphy_no, + struct mipi_ctrl_cfg *cfg) +{ + u32 test_code = 0, test_data = 0; + + /* Set PLL regulator in bypass */ + test_code = TEST_CODE_PLL_ANALOG_PROG; + test_data = 0x01; + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* PLL Parameters Setup */ + mipi_tx_pll_setup(kmb, dphy_no, cfg->ref_clk_khz / 1000, + cfg->lane_rate_mbps / 2); + + /* Set clksel */ + kmb_write_bits_mipi(kmb, DPHY_INIT_CTRL1, PLL_CLKSEL_0, 2, 0x01); + + /* Set pll_shadow_control */ + kmb_set_bit_mipi(kmb, DPHY_INIT_CTRL1, PLL_SHADOW_CTRL); +} + +static void set_lane_data_rate(struct kmb_drm_private *kmb, u32 dphy_no, + struct mipi_ctrl_cfg *cfg) +{ + u32 i, test_code = 0, test_data = 0; + + for (i = 0; i < MIPI_DPHY_DEFAULT_BIT_RATES; i++) { + if (mipi_hs_freq_range[i].default_bit_rate_mbps < + cfg->lane_rate_mbps) + continue; + + /* Send the test code and data */ + /* bit[6:0] = hsfreqrange_ovr bit[7] = hsfreqrange_ovr_en */ + test_code = TEST_CODE_HS_FREQ_RANGE_CFG; + test_data = (mipi_hs_freq_range[i].hsfreqrange_code & 0x7f) | + (1 << 7); + test_mode_send(kmb, dphy_no, test_code, test_data); + break; + } +} + +static void dphy_init_sequence(struct kmb_drm_private *kmb, + struct mipi_ctrl_cfg *cfg, u32 dphy_no, + int active_lanes, enum dphy_mode mode) +{ + u32 test_code = 0, test_data = 0, val; + + /* Set D-PHY in shutdown mode */ + /* Assert RSTZ signal */ + CLR_DPHY_INIT_CTRL0(kmb, dphy_no, RESETZ); + + /* Assert SHUTDOWNZ signal */ + CLR_DPHY_INIT_CTRL0(kmb, dphy_no, SHUTDOWNZ); + val = kmb_read_mipi(kmb, DPHY_INIT_CTRL0); + + /* Init D-PHY_n + * Pulse testclear signal to make sure the d-phy configuration + * starts from a clean base + */ + CLR_DPHY_TEST_CTRL0(kmb, dphy_no); + ndelay(15); + SET_DPHY_TEST_CTRL0(kmb, dphy_no); + ndelay(15); + CLR_DPHY_TEST_CTRL0(kmb, dphy_no); + ndelay(15); + + /* Set mastermacro bit - Master or slave mode */ + test_code = TEST_CODE_MULTIPLE_PHY_CTRL; + + /* DPHY has its own clock lane enabled (master) */ + if (mode == MIPI_DPHY_MASTER) + test_data = 0x01; + else + test_data = 0x00; + + /* Send the test code and data */ + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Set the lane data rate */ + set_lane_data_rate(kmb, dphy_no, cfg); + + /* High-Speed Tx Slew Rate Calibration + * BitRate: > 1.5 Gbps && <= 2.5 Gbps: slew rate control OFF + */ + if (cfg->lane_rate_mbps > 1500) + set_slewrate_gt_1500(kmb, dphy_no); + else if (cfg->lane_rate_mbps > 1000) + set_slewrate_gt_1000(kmb, dphy_no); + else + set_slewrate_lt_1000(kmb, dphy_no); + + /* Set cfgclkfreqrange */ + val = (((cfg->cfg_clk_khz / 1000) - 17) * 4) & 0x3f; + SET_DPHY_FREQ_CTRL0_3(kmb, dphy_no, val); + + /* Enable config clk for the corresponding d-phy */ + kmb_set_bit_mipi(kmb, DPHY_CFG_CLK_EN, dphy_no); + + /* PLL setup */ + if (mode == MIPI_DPHY_MASTER) + setup_pll(kmb, dphy_no, cfg); + + /* Send NORMAL OPERATION test code */ + test_code = 0x0; + test_data = 0x0; + test_mode_send(kmb, dphy_no, test_code, test_data); + + /* Configure BASEDIR for data lanes + * NOTE: basedir only applies to LANE_0 of each D-PHY. + * The other lanes keep their direction based on the D-PHY type, + * either Rx or Tx. + * bits[5:0] - BaseDir: 1 = Rx + * bits[9:6] - BaseDir: 0 = Tx + */ + kmb_write_bits_mipi(kmb, DPHY_INIT_CTRL2, 0, 9, 0x03f); + ndelay(15); + + /* Enable CLOCK LANE + * Clock lane should be enabled regardless of the direction + * set for the D-PHY (Rx/Tx) + */ + kmb_set_bit_mipi(kmb, DPHY_INIT_CTRL2, 12 + dphy_no); + + /* Enable DATA LANES */ + kmb_write_bits_mipi(kmb, DPHY_ENABLE, dphy_no * 2, 2, + ((1 << active_lanes) - 1)); + + ndelay(15); + + /* Take D-PHY out of shutdown mode */ + /* Deassert SHUTDOWNZ signal */ + SET_DPHY_INIT_CTRL0(kmb, dphy_no, SHUTDOWNZ); + ndelay(15); + + /* Deassert RSTZ signal */ + SET_DPHY_INIT_CTRL0(kmb, dphy_no, RESETZ); +} + +static void dphy_wait_fsm(struct kmb_drm_private *kmb, u32 dphy_no, + enum dphy_tx_fsm fsm_state) +{ + enum dphy_tx_fsm val = DPHY_TX_POWERDWN; + int i = 0; + int status = 1; + + do { + test_mode_send(kmb, dphy_no, TEST_CODE_FSM_CONTROL, 0x80); + + val = GET_TEST_DOUT4_7(kmb, dphy_no); + i++; + if (i > TIMEOUT) { + status = 0; + break; + } + } while (val != fsm_state); + + drm_dbg(&kmb->drm, "%s: dphy %d val = %x", __func__, dphy_no, val); + drm_dbg(&kmb->drm, "* DPHY %d WAIT_FSM %s *", + dphy_no, status ? "SUCCESS" : "FAILED"); +} + +static void wait_init_done(struct kmb_drm_private *kmb, u32 dphy_no, + u32 active_lanes) +{ + u32 stopstatedata = 0; + u32 data_lanes = (1 << active_lanes) - 1; + int i = 0, val; + int status = 1; + + do { + val = kmb_read_mipi(kmb, MIPI_DPHY_STAT4_7); + stopstatedata = GET_STOPSTATE_DATA(kmb, dphy_no) & data_lanes; + + /* TODO-need to add a time out and return failure */ + i++; + + if (i > TIMEOUT) { + status = 0; + drm_dbg(&kmb->drm, + "! WAIT_INIT_DONE: TIMING OUT!(err_stat=%d)", + kmb_read_mipi(kmb, MIPI_DPHY_ERR_STAT6_7)); + break; + } + } while (stopstatedata != data_lanes); + + drm_dbg(&kmb->drm, "* DPHY %d INIT - %s *", + dphy_no, status ? "SUCCESS" : "FAILED"); +} + +static void wait_pll_lock(struct kmb_drm_private *kmb, u32 dphy_no) +{ + int i = 0; + int status = 1; + + do { + /* TODO-need to add a time out and return failure */ + i++; + if (i > TIMEOUT) { + status = 0; + drm_dbg(&kmb->drm, "%s: timing out", __func__); + break; + } + } while (!GET_PLL_LOCK(kmb, dphy_no)); + + drm_dbg(&kmb->drm, "* PLL Locked for DPHY %d - %s *", + dphy_no, status ? "SUCCESS" : "FAILED"); +} + +static u32 mipi_tx_init_dphy(struct kmb_drm_private *kmb, + struct mipi_ctrl_cfg *cfg) +{ + u32 dphy_no = MIPI_DPHY6; + + /* Multiple D-PHYs needed */ + if (cfg->active_lanes > MIPI_DPHY_D_LANES) { + /* + *Initialization for Tx aggregation mode is done according to + *a. start init PHY1 + *b. poll for PHY1 FSM state LOCK + * b1. reg addr 0x03[3:0] - state_main[3:0] == 5 (LOCK) + *c. poll for PHY1 calibrations done : + * c1. termination calibration lower section: addr 0x22[5] + * - rescal_done + * c2. slewrate calibration (if data rate < = 1500 Mbps): + * addr 0xA7[3:2] - srcal_done, sr_finished + *d. start init PHY0 + *e. poll for PHY0 stopstate + *f. poll for PHY1 stopstate + */ + /* PHY #N+1 ('slave') */ + + dphy_init_sequence(kmb, cfg, dphy_no + 1, + (cfg->active_lanes - MIPI_DPHY_D_LANES), + MIPI_DPHY_SLAVE); + dphy_wait_fsm(kmb, dphy_no + 1, DPHY_TX_LOCK); + + /* PHY #N master */ + dphy_init_sequence(kmb, cfg, dphy_no, MIPI_DPHY_D_LANES, + MIPI_DPHY_MASTER); + + /* Wait for DPHY init to complete */ + wait_init_done(kmb, dphy_no, MIPI_DPHY_D_LANES); + wait_init_done(kmb, dphy_no + 1, + cfg->active_lanes - MIPI_DPHY_D_LANES); + wait_pll_lock(kmb, dphy_no); + wait_pll_lock(kmb, dphy_no + 1); + dphy_wait_fsm(kmb, dphy_no, DPHY_TX_IDLE); + } else { /* Single DPHY */ + dphy_init_sequence(kmb, cfg, dphy_no, cfg->active_lanes, + MIPI_DPHY_MASTER); + dphy_wait_fsm(kmb, dphy_no, DPHY_TX_IDLE); + wait_init_done(kmb, dphy_no, cfg->active_lanes); + wait_pll_lock(kmb, dphy_no); + } + + return 0; +} + +static void connect_lcd_to_mipi(struct kmb_drm_private *kmb) +{ + /* DISABLE MIPI->CIF CONNECTION */ + kmb_write_msscam(kmb, MSS_MIPI_CIF_CFG, 0); + + /* ENABLE LCD->MIPI CONNECTION */ + kmb_write_msscam(kmb, MSS_LCD_MIPI_CFG, 1); + + /* DISABLE LCD->CIF LOOPBACK */ + kmb_write_msscam(kmb, MSS_LOOPBACK_CFG, 0); +} + +int kmb_dsi_mode_set(struct drm_device *dev, struct drm_display_mode *mode) +{ + struct kmb_drm_private *kmb = to_kmb(dev); + u64 data_rate; + + mipi_tx_init_cfg.active_lanes = MIPI_TX_ACTIVE_LANES; + + mipi_tx_frame0_sect_cfg.width_pixels = mode->crtc_hdisplay; + mipi_tx_frame0_sect_cfg.height_lines = mode->crtc_vdisplay; + mipitx_frame0_cfg.vsync_width = + mode->crtc_vsync_end - mode->crtc_vsync_start; + mipitx_frame0_cfg.v_backporch = + mode->crtc_vtotal - mode->crtc_vsync_end; + mipitx_frame0_cfg.v_frontporch = + mode->crtc_vsync_start - mode->crtc_vdisplay; + mipitx_frame0_cfg.hsync_width = + mode->crtc_hsync_end - mode->crtc_hsync_start; + mipitx_frame0_cfg.h_backporch = + mode->crtc_htotal - mode->crtc_hsync_end; + mipitx_frame0_cfg.h_frontporch = + mode->crtc_hsync_start - mode->crtc_hdisplay; + + /* Lane rate = (vtotal*htotal*fps*bpp)/4 / 1000000 + * to convert to Mbps + */ + data_rate = ((((u32)mode->crtc_vtotal * (u32)mode->crtc_htotal) * + (u32)(drm_mode_vrefresh(mode)) * + MIPI_TX_BPP) / mipi_tx_init_cfg.active_lanes) / 1000000; + + drm_dbg(&kmb->drm, "data_rate=%u active_lanes=%d\n", + (u32)data_rate, mipi_tx_init_cfg.active_lanes); + + /* When late rate < 800, modeset fails with 4 lanes, + * so switch to 2 lanes + */ + if (data_rate < 800) { + mipi_tx_init_cfg.active_lanes = 2; + mipi_tx_init_cfg.lane_rate_mbps = data_rate * 2; + } else { + mipi_tx_init_cfg.lane_rate_mbps = data_rate; + } + + kmb_write_mipi(kmb, DPHY_ENABLE, 0); + kmb_write_mipi(kmb, DPHY_INIT_CTRL0, 0); + kmb_write_mipi(kmb, DPHY_INIT_CTRL1, 0); + kmb_write_mipi(kmb, DPHY_INIT_CTRL2, 0); + + /* Initialize mipi controller */ + mipi_tx_init_cntrl(kmb, &mipi_tx_init_cfg); + + /* Dphy initialization */ + mipi_tx_init_dphy(kmb, &mipi_tx_init_cfg); + + connect_lcd_to_mipi(kmb); + + drm_info(&kmb->drm, "mipi hw_initialized"); + + return 0; +} + +int kmb_dsi_init(struct drm_device *dev, struct drm_bridge *bridge) +{ + struct kmb_dsi *kmb_dsi; + struct drm_encoder *encoder; + struct drm_connector *connector; + struct kmb_dsi_host *host; + int ret = 0; + + kmb_dsi = kzalloc(sizeof(*kmb_dsi), GFP_KERNEL); + if (!kmb_dsi) { + DRM_ERROR("failed to allocate kmb_dsi\n"); + return -ENOMEM; + } + + host = kmb_dsi_host_init(dev, kmb_dsi); + if (!host) { + DRM_ERROR("Failed to allocate host\n"); + kfree(kmb_dsi); + return -ENOMEM; + } + + kmb_dsi->dsi_host = host; + encoder = &kmb_dsi->base; + encoder->possible_crtcs = 1; + encoder->possible_clones = 0; + + drm_encoder_init(dev, encoder, &kmb_dsi_funcs, DRM_MODE_ENCODER_DSI, + "MIPI-DSI"); + + /* Link drm_bridge to encoder */ + ret = drm_bridge_attach(encoder, bridge, NULL, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); + if (ret) { + DRM_ERROR("failed to attach bridge to MIPI\n"); + drm_encoder_cleanup(encoder); + return ret; + } + drm_info(dev, "Bridge attached : SUCCESS"); + connector = drm_bridge_connector_init(dev, encoder); + if (IS_ERR(connector)) { + DRM_ERROR("Unable to create bridge connector"); + drm_encoder_cleanup(encoder); + return PTR_ERR(connector); + } + drm_connector_attach_encoder(connector, encoder); + + return 0; +} diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h new file mode 100644 index 0000000..399666b --- /dev/null +++ b/drivers/gpu/drm/kmb/kmb_dsi.h @@ -0,0 +1,350 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright © 2019-2020 Intel Corporation + */ + +#ifndef __KMB_DSI_H__ +#define __KMB_DSI_H__ + +#include <drm/drm_crtc.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include "kmb_drv.h" + +/* MIPI TX CFG*/ +#define MIPI_TX_LANE_DATA_RATE_MBPS 891 +#define MIPI_TX_REF_CLK_KHZ 24000 +#define MIPI_TX_CFG_CLK_KHZ 24000 +#define MIPI_TX_BPP 24 + +/* DPHY Tx test codes*/ +#define TEST_CODE_FSM_CONTROL 0x03 +#define TEST_CODE_MULTIPLE_PHY_CTRL 0x0C +#define TEST_CODE_PLL_PROPORTIONAL_CHARGE_PUMP_CTRL 0x0E +#define TEST_CODE_PLL_INTEGRAL_CHARGE_PUMP_CTRL 0x0F +#define TEST_CODE_PLL_VCO_CTRL 0x12 +#define TEST_CODE_PLL_GMP_CTRL 0x13 +#define TEST_CODE_PLL_PHASE_ERR_CTRL 0x14 +#define TEST_CODE_PLL_LOCK_FILTER 0x15 +#define TEST_CODE_PLL_UNLOCK_FILTER 0x16 +#define TEST_CODE_PLL_INPUT_DIVIDER 0x17 +#define TEST_CODE_PLL_FEEDBACK_DIVIDER 0x18 +#define PLL_FEEDBACK_DIVIDER_HIGH BIT(7) +#define TEST_CODE_PLL_OUTPUT_CLK_SEL 0x19 +#define PLL_N_OVR_EN BIT(4) +#define PLL_M_OVR_EN BIT(5) +#define TEST_CODE_VOD_LEVEL 0x24 +#define TEST_CODE_PLL_CHARGE_PUMP_BIAS 0x1C +#define TEST_CODE_PLL_LOCK_DETECTOR 0x1D +#define TEST_CODE_HS_FREQ_RANGE_CFG 0x44 +#define TEST_CODE_PLL_ANALOG_PROG 0x1F +#define TEST_CODE_SLEW_RATE_OVERRIDE_CTRL 0xA0 +#define TEST_CODE_SLEW_RATE_DDL_LOOP_CTRL 0xA3 +#define TEST_CODE_SLEW_RATE_DDL_CYCLES 0xA4 + +/* DPHY params */ +#define PLL_N_MIN 0 +#define PLL_N_MAX 15 +#define PLL_M_MIN 62 +#define PLL_M_MAX 623 +#define PLL_FVCO_MAX 1250 + +#define TIMEOUT 600 + +#define MIPI_TX_FRAME_GEN 4 +#define MIPI_TX_FRAME_GEN_SECTIONS 4 +#define MIPI_CTRL_VIRTUAL_CHANNELS 4 +#define MIPI_D_LANES_PER_DPHY 2 +#define MIPI_CTRL_2LANE_MAX_MC_FIFO_LOC 255 +#define MIPI_CTRL_4LANE_MAX_MC_FIFO_LOC 511 +/* 2 Data Lanes per D-PHY */ +#define MIPI_DPHY_D_LANES 2 +#define MIPI_DPHY_DEFAULT_BIT_RATES 63 + +#define to_kmb_connector(x) container_of(x, struct kmb_connector, base) +#define to_kmb_host(x) container_of(x, struct kmb_dsi_host, base) +#define to_kmb_dsi(x) container_of(x, struct kmb_dsi, base) + +struct kmb_connector; +struct kmb_dsi_host; + +struct kmb_dsi { + struct drm_encoder base; + struct kmb_dsi_host *dsi_host; + struct drm_bridge *bridge; +}; + +struct kmb_dsi_host { + struct mipi_dsi_host *base; + struct kmb_dsi *kmb_dsi; + struct mipi_dsi_device *device; +}; + +struct kmb_connector { + struct drm_connector base; + struct drm_encoder *encoder; + struct drm_display_mode *fixed_mode; +}; + +/* DPHY Tx test codes */ + +enum mipi_ctrl_num { + MIPI_CTRL0 = 0, + MIPI_CTRL1, + MIPI_CTRL2, + MIPI_CTRL3, + MIPI_CTRL4, + MIPI_CTRL5, + MIPI_CTRL6, + MIPI_CTRL7, + MIPI_CTRL8, + MIPI_CTRL9, + MIPI_CTRL_NA +}; + +enum mipi_dphy_num { + MIPI_DPHY0 = 0, + MIPI_DPHY1, + MIPI_DPHY2, + MIPI_DPHY3, + MIPI_DPHY4, + MIPI_DPHY5, + MIPI_DPHY6, + MIPI_DPHY7, + MIPI_DPHY8, + MIPI_DPHY9, + MIPI_DPHY_NA +}; + +enum mipi_dir { + MIPI_RX, + MIPI_TX +}; + +enum mipi_ctrl_type { + MIPI_DSI, + MIPI_CSI +}; + +enum mipi_data_if { + MIPI_IF_DMA, + MIPI_IF_PARALLEL +}; + +enum mipi_data_mode { + MIPI_DATA_MODE0, + MIPI_DATA_MODE1, + MIPI_DATA_MODE2, + MIPI_DATA_MODE3 +}; + +enum mipi_dsi_video_mode { + DSI_VIDEO_MODE_NO_BURST_PULSE, + DSI_VIDEO_MODE_NO_BURST_EVENT, + DSI_VIDEO_MODE_BURST +}; + +enum mipi_dsi_blanking_mode { + TRANSITION_TO_LOW_POWER, + SEND_BLANK_PACKET +}; + +enum mipi_dsi_eotp { + DSI_EOTP_DISABLED, + DSI_EOTP_ENABLES +}; + +enum mipi_dsi_data_type { + DSI_SP_DT_RESERVED_00 = 0x00, + DSI_SP_DT_VSYNC_START = 0x01, + DSI_SP_DT_COLOR_MODE_OFF = 0x02, + DSI_SP_DT_GENERIC_SHORT_WR = 0x03, + DSI_SP_DT_GENERIC_RD = 0x04, + DSI_SP_DT_DCS_SHORT_WR = 0x05, + DSI_SP_DT_DCS_RD = 0x06, + DSI_SP_DT_EOTP = 0x08, + DSI_LP_DT_NULL = 0x09, + DSI_LP_DT_RESERVED_0A = 0x0a, + DSI_LP_DT_RESERVED_0B = 0x0b, + DSI_LP_DT_LPPS_YCBCR422_20B = 0x0c, + DSI_LP_DT_PPS_RGB101010_30B = 0x0d, + DSI_LP_DT_PPS_RGB565_16B = 0x0e, + DSI_LP_DT_RESERVED_0F = 0x0f, + + DSI_SP_DT_RESERVED_10 = 0x10, + DSI_SP_DT_VSYNC_END = 0x11, + DSI_SP_DT_COLOR_MODE_ON = 0x12, + DSI_SP_DT_GENERIC_SHORT_WR_1PAR = 0x13, + DSI_SP_DT_GENERIC_RD_1PAR = 0x14, + DSI_SP_DT_DCS_SHORT_WR_1PAR = 0x15, + DSI_SP_DT_RESERVED_16 = 0x16, + DSI_SP_DT_RESERVED_17 = 0x17, + DSI_SP_DT_RESERVED_18 = 0x18, + DSI_LP_DT_BLANK = 0x19, + DSI_LP_DT_RESERVED_1A = 0x1a, + DSI_LP_DT_RESERVED_1B = 0x1b, + DSI_LP_DT_PPS_YCBCR422_24B = 0x1c, + DSI_LP_DT_PPS_RGB121212_36B = 0x1d, + DSI_LP_DT_PPS_RGB666_18B = 0x1e, + DSI_LP_DT_RESERVED_1F = 0x1f, + + DSI_SP_DT_RESERVED_20 = 0x20, + DSI_SP_DT_HSYNC_START = 0x21, + DSI_SP_DT_SHUT_DOWN_PERIPH_CMD = 0x22, + DSI_SP_DT_GENERIC_SHORT_WR_2PAR = 0x23, + DSI_SP_DT_GENERIC_RD_2PAR = 0x24, + DSI_SP_DT_RESERVED_25 = 0x25, + DSI_SP_DT_RESERVED_26 = 0x26, + DSI_SP_DT_RESERVED_27 = 0x27, + DSI_SP_DT_RESERVED_28 = 0x28, + DSI_LP_DT_GENERIC_LONG_WR = 0x29, + DSI_LP_DT_RESERVED_2A = 0x2a, + DSI_LP_DT_RESERVED_2B = 0x2b, + DSI_LP_DT_PPS_YCBCR422_16B = 0x2c, + DSI_LP_DT_RESERVED_2D = 0x2d, + DSI_LP_DT_LPPS_RGB666_18B = 0x2e, + DSI_LP_DT_RESERVED_2F = 0x2f, + + DSI_SP_DT_RESERVED_30 = 0x30, + DSI_SP_DT_HSYNC_END = 0x31, + DSI_SP_DT_TURN_ON_PERIPH_CMD = 0x32, + DSI_SP_DT_RESERVED_33 = 0x33, + DSI_SP_DT_RESERVED_34 = 0x34, + DSI_SP_DT_RESERVED_35 = 0x35, + DSI_SP_DT_RESERVED_36 = 0x36, + DSI_SP_DT_SET_MAX_RETURN_PKT_SIZE = 0x37, + DSI_SP_DT_RESERVED_38 = 0x38, + DSI_LP_DT_DSC_LONG_WR = 0x39, + DSI_LP_DT_RESERVED_3A = 0x3a, + DSI_LP_DT_RESERVED_3B = 0x3b, + DSI_LP_DT_RESERVED_3C = 0x3c, + DSI_LP_DT_PPS_YCBCR420_12B = 0x3d, + DSI_LP_DT_PPS_RGB888_24B = 0x3e, + DSI_LP_DT_RESERVED_3F = 0x3f +}; + +enum mipi_tx_hs_tp_sel { + MIPI_TX_HS_TP_WHOLE_FRAME_COLOR0 = 0, + MIPI_TX_HS_TP_WHOLE_FRAME_COLOR1, + MIPI_TX_HS_TP_V_STRIPES, + MIPI_TX_HS_TP_H_STRIPES, +}; + +enum dphy_mode { + MIPI_DPHY_SLAVE = 0, + MIPI_DPHY_MASTER +}; + +enum dphy_tx_fsm { + DPHY_TX_POWERDWN = 0, + DPHY_TX_BGPON, + DPHY_TX_TERMCAL, + DPHY_TX_TERMCALUP, + DPHY_TX_OFFSETCAL, + DPHY_TX_LOCK, + DPHY_TX_SRCAL, + DPHY_TX_IDLE, + DPHY_TX_ULP, + DPHY_TX_LANESTART, + DPHY_TX_CLKALIGN, + DPHY_TX_DDLTUNNING, + DPHY_TX_ULP_FORCE_PLL, + DPHY_TX_LOCK_LOSS +}; + +struct mipi_data_type_params { + u8 size_constraint_pixels; + u8 size_constraint_bytes; + u8 pixels_per_pclk; + u8 bits_per_pclk; +}; + +struct mipi_tx_dsi_cfg { + u8 hfp_blank_en; /*horizontal front porch blanking enable */ + u8 eotp_en; /*End of transmission packet enable */ + /*last vertical front porch blanking mode */ + u8 lpm_last_vfp_line; + /*first vertical sync active blanking mode */ + u8 lpm_first_vsa_line; + u8 sync_pulse_eventn; /*sync type */ + u8 hfp_blanking; /*horizontal front porch blanking mode */ + u8 hbp_blanking; /*horizontal back porch blanking mode */ + u8 hsa_blanking; /*horizontal sync active blanking mode */ + u8 v_blanking; /*vertical timing blanking mode */ +}; + +struct mipi_tx_frame_section_cfg { + u32 dma_v_stride; + u16 dma_v_scale_cfg; + u16 width_pixels; + u16 height_lines; + u8 dma_packed; + u8 bpp; + u8 bpp_unpacked; + u8 dma_h_stride; + u8 data_type; + u8 data_mode; + u8 dma_flip_rotate_sel; +}; + +struct mipi_tx_frame_timing_cfg { + u32 bpp; + u32 lane_rate_mbps; + u32 hsync_width; + u32 h_backporch; + u32 h_frontporch; + u32 h_active; + u16 vsync_width; + u16 v_backporch; + u16 v_frontporch; + u16 v_active; + u8 active_lanes; +}; + +struct mipi_tx_frame_sect_phcfg { + u32 wc; + enum mipi_data_mode data_mode; + enum mipi_dsi_data_type data_type; + u8 vchannel; + u8 dma_packed; +}; + +struct mipi_tx_frame_cfg { + struct mipi_tx_frame_section_cfg *sections[MIPI_TX_FRAME_GEN_SECTIONS]; + u32 hsync_width; /*in pixels */ + u32 h_backporch; /*in pixels */ + u32 h_frontporch; /*in pixels */ + u16 vsync_width; /*in lines */ + u16 v_backporch; /*in lines */ + u16 v_frontporch; /*in lines */ +}; + +struct mipi_tx_ctrl_cfg { + struct mipi_tx_frame_cfg *frames[MIPI_TX_FRAME_GEN]; + struct mipi_tx_dsi_cfg *tx_dsi_cfg; + u8 line_sync_pkt_en; + u8 line_counter_active; + u8 frame_counter_active; + u8 tx_hsclkkidle_cnt; + u8 tx_hsexit_cnt; + u8 tx_crc_en; + u8 tx_hact_wait_stop; + u8 tx_always_use_hact; + u8 tx_wait_trig; + u8 tx_wait_all_sect; +}; + +/*configuration structure for MIPI control */ +struct mipi_ctrl_cfg { + u8 active_lanes; /* # active lanes per controller 2/4 */ + u32 lane_rate_mbps; /*MBPS */ + u32 ref_clk_khz; + u32 cfg_clk_khz; + struct mipi_tx_ctrl_cfg tx_ctrl_cfg; +}; + +struct drm_bridge *kmb_dsi_host_bridge_init(struct device *dev); +int kmb_dsi_init(struct drm_device *dev, struct drm_bridge *bridge); +void kmb_dsi_host_unregister(void); +int kmb_dsi_mode_set(struct drm_device *dev, struct drm_display_mode *mode); +#endif /* __KMB_DSI_H__ */