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.
v1: - Remove dphy and dsi graph binding, merge the dphy driver into the dsi.
v2: - Use drm_xxx to replace all DRM_XXX. - Use kzalloc to replace devm_kzalloc for sprd_dsi structure init.
v4: - Use drmm_helpers to allocate encoder. - Move allocate encoder and connector to bind function.
v5: - Drop the dsi ip file prefix. - Fix the checkpatch warnings. - Add Signed-off-by for dsi&dphy patch. - Use the mode_flags of mipi_dsi_device to setup crtc DPI and EDPI mode.
v6: - Redesign the way to access the dsi register. - Reduce the dsi_context member variables. --- drivers/gpu/drm/sprd/Kconfig | 1 + drivers/gpu/drm/sprd/Makefile | 4 +- drivers/gpu/drm/sprd/megacores_pll.c | 317 +++++++ drivers/gpu/drm/sprd/megacores_pll.h | 146 +++ drivers/gpu/drm/sprd/sprd_dpu.c | 17 + drivers/gpu/drm/sprd/sprd_drm.c | 1 + drivers/gpu/drm/sprd/sprd_drm.h | 1 + drivers/gpu/drm/sprd/sprd_dsi.c | 1260 ++++++++++++++++++++++++++ drivers/gpu/drm/sprd/sprd_dsi.h | 94 ++ 9 files changed, 1840 insertions(+), 1 deletion(-) 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_dsi.c create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h
diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig index 37762c333..3edeaeca0 100644 --- a/drivers/gpu/drm/sprd/Kconfig +++ b/drivers/gpu/drm/sprd/Kconfig @@ -5,6 +5,7 @@ config DRM_SPRD select DRM_GEM_CMA_HELPER select DRM_KMS_CMA_HELPER select DRM_KMS_HELPER + select DRM_MIPI_DSI select VIDEOMODE_HELPERS help Choose this option if you have a Unisoc chipset. diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile index ab12b95e6..73f96c459 100644 --- a/drivers/gpu/drm/sprd/Makefile +++ b/drivers/gpu/drm/sprd/Makefile @@ -1,4 +1,6 @@ # SPDX-License-Identifier: GPL-2.0
obj-y := sprd_drm.o \ - sprd_dpu.o + sprd_dpu.o \ + sprd_dsi.o \ + megacores_pll.o diff --git a/drivers/gpu/drm/sprd/megacores_pll.c b/drivers/gpu/drm/sprd/megacores_pll.c new file mode 100644 index 000000000..0dfd3c372 --- /dev/null +++ b/drivers/gpu/drm/sprd/megacores_pll.c @@ -0,0 +1,317 @@ +// 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 *)® + + 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 dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + struct regmap *regmap = ctx->regmap; + struct dphy_pll *pll = ctx->pll; + int ret; + + pll->freq = dsi->slave->hs_rate; + + /* FREQ = 26M * (NINT + KINT / 2^20) / out_sel */ + ret = dphy_calc_pll_param(pll); + if (ret) { + drm_err(dsi->drm, "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 dsi_context *ctx) +{ + struct regmap *regmap = ctx->regmap; + struct dphy_pll *pll = ctx->pll; + 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 / (pll->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 000000000..bf20aae65 --- /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_dsi.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 dsi_context; + +int dphy_pll_config(struct dsi_context *ctx); +void dphy_timing_config(struct dsi_context *ctx); + +#endif /* _MEGACORES_PLL_H_ */ diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c index 448dd4fb6..4e3b30abe 100644 --- a/drivers/gpu/drm/sprd/sprd_dpu.c +++ b/drivers/gpu/drm/sprd/sprd_dpu.c @@ -25,6 +25,7 @@
#include "sprd_drm.h" #include "sprd_dpu.h" +#include "sprd_dsi.h"
/* Global control registers */ #define REG_DPU_CTRL 0x04 @@ -686,9 +687,25 @@ static void sprd_crtc_mode_set_nofb(struct drm_crtc *crtc) { struct sprd_dpu *dpu = to_sprd_crtc(crtc); struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct drm_encoder *encoder; + struct mipi_dsi_device *slave; + struct sprd_dsi *dsi;
drm_display_mode_to_videomode(mode, &dpu->ctx.vm);
+ drm_for_each_encoder(encoder, crtc->dev) { + if (encoder->crtc != crtc) + continue; + + dsi = encoder_to_dsi(encoder); + slave = dsi->slave; + + if (slave->mode_flags & MIPI_DSI_MODE_VIDEO) + dpu->ctx.if_type = SPRD_DPU_IF_DPI; + else + dpu->ctx.if_type = SPRD_DPU_IF_EDPI; + } + sprd_dpi_init(dpu); }
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c index 549b71278..68cf0933c 100644 --- a/drivers/gpu/drm/sprd/sprd_drm.c +++ b/drivers/gpu/drm/sprd/sprd_drm.c @@ -183,6 +183,7 @@ static struct platform_driver sprd_drm_driver = { static struct platform_driver *sprd_drm_drivers[] = { &sprd_drm_driver, &sprd_dpu_driver, + &sprd_dsi_driver, };
static int __init sprd_drm_init(void) diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h index 85d4a8b9f..95d1b972f 100644 --- a/drivers/gpu/drm/sprd/sprd_drm.h +++ b/drivers/gpu/drm/sprd/sprd_drm.h @@ -14,5 +14,6 @@ struct sprd_drm { };
extern struct platform_driver sprd_dpu_driver; +extern struct platform_driver sprd_dsi_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 000000000..5ce98fe90 --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dsi.c @@ -0,0 +1,1260 @@ +// 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" + +#define SOFT_RESET 0x04 +#define MASK_PROTOCOL_INT 0x0C +#define MASK_INTERNAL_INT 0x14 +#define DSI_MODE_CFG 0x18 + +#define VIRTUAL_CHANNEL_ID 0x1C +#define GEN_RX_VCID GENMASK(1, 0) +#define VIDEO_PKT_VCID GENMASK(3, 2) + +#define DPI_VIDEO_FORMAT 0x20 +#define DPI_VIDEO_MODE_FORMAT GENMASK(5, 0) +#define LOOSELY18_EN BIT(6) + +#define VIDEO_PKT_CONFIG 0x24 +#define VIDEO_PKT_SIZE GENMASK(15, 0) +#define VIDEO_LINE_CHUNK_NUM GENMASK(31, 16) + +#define VIDEO_LINE_HBLK_TIME 0x28 +#define VIDEO_LINE_HBP_TIME GENMASK(15, 0) +#define VIDEO_LINE_HSA_TIME GENMASK(31, 16) + +#define VIDEO_LINE_TIME 0x2C + +#define VIDEO_VBLK_LINES 0x30 +#define VFP_LINES GENMASK(9, 0) +#define VBP_LINES GENMASK(19, 10) +#define VSA_LINES GENMASK(29, 20) + +#define VIDEO_VACTIVE_LINES 0x34 + +#define VID_MODE_CFG 0x38 +#define VID_MODE_TYPE GENMASK(1, 0) +#define LP_VSA_EN BIT(8) +#define LP_VBP_EN BIT(9) +#define LP_VFP_EN BIT(10) +#define LP_VACT_EN BIT(11) +#define LP_HBP_EN BIT(12) +#define LP_HFP_EN BIT(13) +#define FRAME_BTA_ACK_EN BIT(14) +#define LP_CMD_EN BIT(15) + +#define TIMEOUT_CNT_CLK_CONFIG 0x40 +#define HTX_TO_CONFIG 0x44 +#define LRX_H_TO_CONFIG 0x48 + +#define TX_ESC_CLK_CONFIG 0x5C + +#define CMD_MODE_CFG 0x68 +#define TEAR_FX_EN BIT(0) +#define ACK_RQST_EN BIT(1) +#define PPS_TX BIT(5) +#define EXQ_TX BIT(6) +#define CMC_TX BIT(7) +#define GEN_SW_0P_TX BIT(8) +#define GEN_SW_1P_TX BIT(9) +#define GEN_SW_2P_TX BIT(10) +#define GEN_SR_0P_TX BIT(11) +#define GEN_SR_1P_TX BIT(12) +#define GEN_SR_2P_TX BIT(13) +#define GEN_LW_TX BIT(14) +#define DCS_SW_0P_TX BIT(16) +#define DCS_SW_1P_TX BIT(17) +#define DCS_SR_0P_TX BIT(18) +#define DCS_LW_TX BIT(19) +#define MAX_RD_PKT_SIZE BIT(24) + +#define GEN_HDR 0x6C +#define GEN_DT GENMASK(5, 0) +#define GEN_VC GENMASK(7, 6) +#define GEN_WC_LSBYTE GENMASK(15, 8) +#define GEN_WC_MSBYTE GENMASK(23, 16) + +#define GEN_PLD_DATA 0x70 +#define GEN_PLD_B1 GENMASK(7, 0) +#define GEN_PLD_B2 GENMASK(15, 8) +#define GEN_PLD_B3 GENMASK(23, 16) +#define GEN_PLD_B4 GENMASK(31, 24) + +#define PHY_CLK_LANE_LP_CTRL 0x74 +#define PHY_CLKLANE_TX_REQ_HS BIT(0) +#define AUTO_CLKLANE_CTRL_EN BIT(1) + +#define PHY_INTERFACE_CTRL 0x78 +#define RF_PHY_SHUTDOWN BIT(0) +#define RF_PHY_RESET_N BIT(1) +#define RF_PHY_CLK_EN BIT(2) + +#define CMD_MODE_STATUS 0x98 +#define GEN_CMD_RDCMD_ONGOING BIT(0) +#define GEN_CMD_RDATA_FIFO_EMPTY BIT(1) +#define GEN_CMD_RDATA_FIFO_FULL BIT(2) +#define GEN_CMD_WDATA_FIFO_EMPTY BIT(3) +#define GEN_CMD_WDATA_FIFO_FULL BIT(4) +#define GEN_CMD_CMD_FIFO_EMPTY BIT(5) +#define GEN_CMD_CMD_FIFO_FULL BIT(6) +#define GEN_CMD_RDCMD_DONE BIT(7) + +#define PHY_STATUS 0x9C +#define PHY_LOCK BIT(1) + +#define PHY_MIN_STOP_TIME 0xA0 +#define PHY_LANE_NUM_CONFIG 0xA4 + +#define PHY_CLKLANE_TIME_CONFIG 0xA8 +#define PHY_CLKLANE_LP_TO_HS_TIME GENMASK(15, 0) +#define PHY_CLKLANE_HS_TO_LP_TIME GENMASK(31, 16) + +#define PHY_DATALANE_TIME_CONFIG 0xAC +#define PHY_DATALANE_LP_TO_HS_TIME GENMASK(15, 0) +#define PHY_DATALANE_HS_TO_LP_TIME GENMASK(31, 16) + +#define MAX_READ_TIME 0xB0 + +#define RX_PKT_CHECK_CONFIG 0xB4 +#define RX_PKT_ECC_EN BIT(0) +#define RX_PKT_CRC_EN BIT(1) + +#define TA_EN 0xB8 + +#define EOTP_EN 0xBC +#define TX_EOTP_EN BIT(0) +#define RX_EOTP_EN BIT(1) + +#define VIDEO_NULLPKT_SIZE 0xC0 +#define DCS_WM_PKT_SIZE 0xC4 +#define PROTOCOL_INT_CLR 0xC8 +#define INTERNAL_INT_CLR 0xCC + +#define VIDEO_SIG_DELAY_CONFIG 0xD0 +#define VIDEO_SIG_DELAY GENMASK(23, 0) +#define VIDEO_SIG_DELAY_MODE BIT(24) + +#define PHY_TST_CTRL0 0xF0 +#define PHY_TESTCLR BIT(0) +#define PHY_TESTCLK BIT(1) + +#define PHY_TST_CTRL1 0xF4 +#define PHY_TESTDIN GENMASK(7, 0) +#define PHY_TESTDOUT GENMASK(15, 8) +#define PHY_TESTEN BIT(16) + +#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 inline u32 +dsi_reg_rd(struct dsi_context *ctx, u32 offset, u32 mask, + u32 shift) +{ + return (readl(ctx->base + offset) & mask) >> shift; +} + +static inline void +dsi_reg_wr(struct dsi_context *ctx, u32 offset, u32 mask, + u32 shift, u32 val) +{ + u32 ret; + + ret = readl(ctx->base + offset); + ret &= ~mask; + ret |= (val << shift) & mask; + writel(ret, ctx->base + offset); +} + +static inline void +dsi_reg_up(struct dsi_context *ctx, u32 offset, u32 mask, + u32 val) +{ + u32 ret = readl(ctx->base + offset); + + writel((ret & ~mask) | (val & mask), ctx->base + offset); +} + +static int regmap_tst_io_write(void *context, u32 reg, u32 val) +{ + struct sprd_dsi *dsi = context; + struct dsi_context *ctx = &dsi->ctx; + + if (val > 0xff || reg > 0xff) + return -EINVAL; + + drm_dbg(dsi->drm, "reg = 0x%02x, val = 0x%02x\n", reg, val); + + dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, PHY_TESTEN); + dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, reg); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, PHY_TESTCLK); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, 0); + dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, 0); + dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, val); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, PHY_TESTCLK); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, 0); + + return 0; +} + +static int regmap_tst_io_read(void *context, u32 reg, u32 *val) +{ + struct sprd_dsi *dsi = context; + struct dsi_context *ctx = &dsi->ctx; + int ret; + + if (reg > 0xff) + return -EINVAL; + + dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, PHY_TESTEN); + dsi_reg_wr(ctx, PHY_TST_CTRL1, PHY_TESTDIN, 0, reg); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, PHY_TESTCLK); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLK, 0); + dsi_reg_up(ctx, PHY_TST_CTRL1, PHY_TESTEN, 0); + + udelay(1); + + ret = dsi_reg_rd(ctx, PHY_TST_CTRL1, PHY_TESTDOUT, 8); + if (ret < 0) + return ret; + + *val = ret; + + drm_dbg(dsi->drm, "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 int dphy_wait_pll_locked(struct dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + int i; + + for (i = 0; i < 50000; i++) { + if (dsi_reg_rd(ctx, PHY_STATUS, PHY_LOCK, 1)) + return 0; + udelay(3); + } + + drm_err(dsi->drm, "dphy pll can not be locked\n"); + return -ETIMEDOUT; +} + +static int dsi_wait_tx_payload_fifo_empty(struct dsi_context *ctx) +{ + int i; + + for (i = 0; i < 5000; i++) { + if (dsi_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_WDATA_FIFO_EMPTY, 3)) + 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_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_CMD_FIFO_EMPTY, 5)) + 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_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_RDCMD_DONE, 7)) + 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) + +static void sprd_dsi_init(struct dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + u32 byte_clk = dsi->slave->hs_rate / 8; + u16 data_hs2lp, data_lp2hs, clk_hs2lp, clk_lp2hs; + u16 max_rd_time; + int div; + + writel(0, ctx->base + SOFT_RESET); + writel(0xffffffff, ctx->base + MASK_PROTOCOL_INT); + writel(0xffffffff, ctx->base + MASK_INTERNAL_INT); + writel(1, ctx->base + DSI_MODE_CFG); + dsi_reg_up(ctx, EOTP_EN, RX_EOTP_EN, 0); + dsi_reg_up(ctx, EOTP_EN, TX_EOTP_EN, 0); + dsi_reg_up(ctx, RX_PKT_CHECK_CONFIG, RX_PKT_ECC_EN, RX_PKT_ECC_EN); + dsi_reg_up(ctx, RX_PKT_CHECK_CONFIG, RX_PKT_CRC_EN, RX_PKT_CRC_EN); + writel(1, ctx->base + TA_EN); + dsi_reg_up(ctx, VIRTUAL_CHANNEL_ID, VIDEO_PKT_VCID, 0); + dsi_reg_up(ctx, VIRTUAL_CHANNEL_ID, GEN_RX_VCID, 0); + + div = DIV_ROUND_UP(byte_clk, dsi->slave->lp_rate); + writel(div, ctx->base + TX_ESC_CLK_CONFIG); + + max_rd_time = ns_to_cycle(ctx->max_rd_time, byte_clk); + writel(max_rd_time, ctx->base + MAX_READ_TIME); + + data_hs2lp = ns_to_cycle(ctx->data_hs2lp, byte_clk); + data_lp2hs = ns_to_cycle(ctx->data_lp2hs, byte_clk); + clk_hs2lp = ns_to_cycle(ctx->clk_hs2lp, byte_clk); + clk_lp2hs = ns_to_cycle(ctx->clk_lp2hs, byte_clk); + dsi_reg_wr(ctx, PHY_DATALANE_TIME_CONFIG, + PHY_DATALANE_HS_TO_LP_TIME, 16, data_hs2lp); + dsi_reg_wr(ctx, PHY_DATALANE_TIME_CONFIG, + PHY_DATALANE_LP_TO_HS_TIME, 0, data_lp2hs); + dsi_reg_wr(ctx, PHY_CLKLANE_TIME_CONFIG, + PHY_CLKLANE_HS_TO_LP_TIME, 16, clk_hs2lp); + dsi_reg_wr(ctx, PHY_CLKLANE_TIME_CONFIG, + PHY_CLKLANE_LP_TO_HS_TIME, 0, clk_lp2hs); + + writel(1, ctx->base + SOFT_RESET); +} + +/* + * Free up resources and shutdown host controller and PHY + */ +static void sprd_dsi_fini(struct dsi_context *ctx) +{ + writel(0xffffffff, ctx->base + MASK_PROTOCOL_INT); + writel(0xffffffff, ctx->base + MASK_INTERNAL_INT); + writel(0, ctx->base + SOFT_RESET); +} + +/* + * 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. + */ +static int sprd_dsi_dpi_video(struct dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + struct videomode *vm = &ctx->vm; + u32 byte_clk = dsi->slave->hs_rate / 8; + 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; + u16 byte_cycle; + + coding = fmt_to_coding(dsi->slave->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 = byte_clk * 1000 / (vm->pixelclock / 1000); + hline = vm->hactive + vm->hsync_len + vm->hfront_porch + + vm->hback_porch; + + writel(0, ctx->base + SOFT_RESET); + dsi_reg_wr(ctx, VID_MODE_CFG, FRAME_BTA_ACK_EN, 15, ctx->frame_ack_en); + dsi_reg_wr(ctx, DPI_VIDEO_FORMAT, DPI_VIDEO_MODE_FORMAT, 0, coding); + dsi_reg_wr(ctx, VID_MODE_CFG, VID_MODE_TYPE, 0, ctx->burst_mode); + byte_cycle = 95 * hline * ratio_x1000 / 100000; + dsi_reg_wr(ctx, VIDEO_SIG_DELAY_CONFIG, VIDEO_SIG_DELAY, 0, byte_cycle); + byte_cycle = hline * ratio_x1000 / 1000; + writel(byte_cycle, ctx->base + VIDEO_LINE_TIME); + byte_cycle = vm->hsync_len * ratio_x1000 / 1000; + dsi_reg_wr(ctx, VIDEO_LINE_HBLK_TIME, VIDEO_LINE_HSA_TIME, 16, byte_cycle); + byte_cycle = vm->hback_porch * ratio_x1000 / 1000; + dsi_reg_wr(ctx, VIDEO_LINE_HBLK_TIME, VIDEO_LINE_HBP_TIME, 0, byte_cycle); + writel(vm->vactive, ctx->base + VIDEO_VACTIVE_LINES); + dsi_reg_wr(ctx, VIDEO_VBLK_LINES, VFP_LINES, 0, vm->vfront_porch); + dsi_reg_wr(ctx, VIDEO_VBLK_LINES, VBP_LINES, 10, vm->vback_porch); + dsi_reg_wr(ctx, VIDEO_VBLK_LINES, VSA_LINES, 20, vm->vsync_len); + dsi_reg_up(ctx, VID_MODE_CFG, LP_HBP_EN | LP_HFP_EN | LP_VACT_EN | + LP_VFP_EN | LP_VBP_EN | LP_VSA_EN, LP_HBP_EN | LP_HFP_EN | + LP_VACT_EN | LP_VFP_EN | LP_VBP_EN | LP_VSA_EN); + + hs_to = (hline * vm->vactive) + (2 * Bpp_x100) / 100; + for (div = 0x80; (div < hs_to) && (div > 2); div--) { + if ((hs_to % div) == 0) { + writel(div, ctx->base + TIMEOUT_CNT_CLK_CONFIG); + writel(hs_to / div, ctx->base + LRX_H_TO_CONFIG); + writel(hs_to / div, ctx->base + HTX_TO_CONFIG); + break; + } + } + + if (ctx->burst_mode == VIDEO_BURST_WITH_SYNC_PULSES) { + dsi_reg_wr(ctx, VIDEO_PKT_CONFIG, VIDEO_PKT_SIZE, 0, video_size); + writel(0, ctx->base + VIDEO_NULLPKT_SIZE); + dsi_reg_up(ctx, VIDEO_PKT_CONFIG, VIDEO_LINE_CHUNK_NUM, 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 / dsi->slave->lanes / 1000; + + /* check if the pixels actually fit on the DSI link */ + if (total_bytes < bytes_per_chunk) { + drm_err(dsi->drm, "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_reg_wr(ctx, VIDEO_PKT_CONFIG, VIDEO_PKT_SIZE, 0, video_size); + writel(null_pkt_size, ctx->base + VIDEO_NULLPKT_SIZE); + dsi_reg_wr(ctx, VIDEO_PKT_CONFIG, VIDEO_LINE_CHUNK_NUM, 16, chunks); + } + + writel(ctx->int0_mask, ctx->base + MASK_PROTOCOL_INT); + writel(ctx->int1_mask, ctx->base + MASK_INTERNAL_INT); + writel(1, ctx->base + SOFT_RESET); + + return 0; +} + +static void sprd_dsi_edpi_video(struct dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_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(dsi->slave->format); + Bpp_x100 = calc_bytes_per_pixel_x100(coding); + max_fifo_len = word_length * fifo_depth * 100 / Bpp_x100; + + writel(0, ctx->base + SOFT_RESET); + dsi_reg_wr(ctx, DPI_VIDEO_FORMAT, DPI_VIDEO_MODE_FORMAT, 0, coding); + dsi_reg_wr(ctx, CMD_MODE_CFG, TEAR_FX_EN, 0, ctx->te_ack_en); + + if (max_fifo_len > hactive) + writel(hactive, ctx->base + DCS_WM_PKT_SIZE); + else + writel(max_fifo_len, ctx->base + DCS_WM_PKT_SIZE); + + writel(ctx->int0_mask, ctx->base + MASK_PROTOCOL_INT); + writel(ctx->int1_mask, ctx->base + MASK_INTERNAL_INT); + writel(1, ctx->base + SOFT_RESET); +} + +/* + * 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 + */ +static int sprd_dsi_wr_pkt(struct dsi_context *ctx, u8 vc, u8 type, + const u8 *param, u16 len) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_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_err(dsi->drm, "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); + + writel(payload, ctx->base + GEN_PLD_DATA); + } + 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_err(dsi->drm, "tx cmd fifo is not empty\n"); + return ret; + } + + writel(type | (vc << 6) | (wc_lsbyte << 8) | (wc_msbyte << 16), + ctx->base + GEN_HDR); + + 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 + */ +static int sprd_dsi_rd_pkt(struct dsi_context *ctx, u8 vc, u8 type, + u8 msb_byte, u8 lsb_byte, + u8 *buffer, u8 bytes_to_read) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + int i, ret; + int count = 0; + u32 temp; + + if (vc > 3) + return -EINVAL; + + /* 1st: send read command to peripheral */ + ret = dsi_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_CMD_FIFO_EMPTY, 5); + if (!ret) + return -EIO; + + writel(type | (vc << 6) | (lsb_byte << 8) | (msb_byte << 16), + ctx->base + GEN_HDR); + + /* 2nd: wait peripheral response completed */ + ret = dsi_wait_rd_resp_completed(ctx); + if (ret) { + drm_err(dsi->drm, "wait read response time out\n"); + return ret; + } + + /* 3rd: get data from rx payload fifo */ + ret = dsi_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_RDATA_FIFO_EMPTY, 1); + if (ret) { + drm_err(dsi->drm, "rx payload fifo empty\n"); + return -EIO; + } + + for (i = 0; i < 100; i++) { + temp = readl(ctx->base + GEN_PLD_DATA); + + 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; + + ret = dsi_reg_rd(ctx, CMD_MODE_STATUS, GEN_CMD_RDATA_FIFO_EMPTY, 1); + if (ret) + return count; + } + + return 0; +} + +static void sprd_dsi_set_work_mode(struct dsi_context *ctx, u8 mode) +{ + if (mode == DSI_MODE_CMD) + writel(1, ctx->base + DSI_MODE_CFG); + else + writel(0, ctx->base + DSI_MODE_CFG); +} + +static void sprd_dsi_lp_cmd_enable(struct dsi_context *ctx) +{ + if (readl(ctx->base + DSI_MODE_CFG)) + dsi_reg_up(ctx, CMD_MODE_CFG, GEN_SW_0P_TX | GEN_SW_1P_TX | + GEN_SW_2P_TX | GEN_SR_0P_TX | GEN_SR_1P_TX | GEN_SR_2P_TX | + GEN_LW_TX | DCS_SW_0P_TX | DCS_SW_1P_TX | DCS_SR_0P_TX | + DCS_LW_TX | MAX_RD_PKT_SIZE, GEN_SW_0P_TX | GEN_SW_1P_TX | + GEN_SW_2P_TX | GEN_SR_0P_TX | GEN_SR_1P_TX | GEN_SR_2P_TX | + GEN_LW_TX | DCS_SW_0P_TX | DCS_SW_1P_TX | DCS_SR_0P_TX | + DCS_LW_TX | MAX_RD_PKT_SIZE); + else + dsi_reg_up(ctx, VID_MODE_CFG, LP_CMD_EN, LP_CMD_EN); +} + +static void sprd_dsi_state_reset(struct dsi_context *ctx) +{ + writel(0, ctx->base + SOFT_RESET); + udelay(100); + writel(1, ctx->base + SOFT_RESET); +} + +static int sprd_dphy_init(struct dsi_context *ctx) +{ + struct sprd_dsi *dsi = container_of(ctx, struct sprd_dsi, ctx); + int ret; + + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_RESET_N, 0); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_SHUTDOWN, 0); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_CLK_EN, 0); + + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLR, 0); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLR, PHY_TESTCLR); + dsi_reg_up(ctx, PHY_TST_CTRL0, PHY_TESTCLR, 0); + + dphy_pll_config(ctx); + dphy_timing_config(ctx); + + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_SHUTDOWN, RF_PHY_SHUTDOWN); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_RESET_N, RF_PHY_RESET_N); + writel(0x1C, ctx->base + PHY_MIN_STOP_TIME); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_CLK_EN, RF_PHY_CLK_EN); + writel(dsi->slave->lanes - 1, ctx->base + PHY_LANE_NUM_CONFIG); + + ret = dphy_wait_pll_locked(ctx); + if (ret) { + drm_err(dsi->drm, "dphy initial failed\n"); + return ret; + } + + return 0; +} + +static void sprd_dphy_fini(struct dsi_context *ctx) +{ + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_RESET_N, 0); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_SHUTDOWN, 0); + dsi_reg_up(ctx, PHY_INTERFACE_CTRL, RF_PHY_RESET_N, RF_PHY_RESET_N); +} + +static void sprd_dsi_encoder_enable(struct drm_encoder *encoder) +{ + struct sprd_dsi *dsi = encoder_to_dsi(encoder); + struct sprd_dpu *dpu = to_sprd_crtc(encoder->crtc); + struct dsi_context *ctx = &dsi->ctx; + + if (ctx->enabled) { + drm_warn(dsi->drm, "dsi is initialized\n"); + return; + } + + sprd_dsi_init(ctx); + if (ctx->work_mode == DSI_MODE_VIDEO) + sprd_dsi_dpi_video(ctx); + else + sprd_dsi_edpi_video(ctx); + + sprd_dphy_init(ctx); + + sprd_dsi_lp_cmd_enable(ctx); + + if (dsi->panel) { + drm_panel_prepare(dsi->panel); + drm_panel_enable(dsi->panel); + } + + sprd_dsi_set_work_mode(ctx, ctx->work_mode); + sprd_dsi_state_reset(ctx); + + if (dsi->slave->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) + dsi_reg_up(ctx, PHY_CLK_LANE_LP_CTRL, AUTO_CLKLANE_CTRL_EN, + AUTO_CLKLANE_CTRL_EN); + else { + dsi_reg_up(ctx, PHY_CLK_LANE_LP_CTRL, RF_PHY_CLK_EN, RF_PHY_CLK_EN); + dsi_reg_up(ctx, PHY_CLK_LANE_LP_CTRL, PHY_CLKLANE_TX_REQ_HS, + PHY_CLKLANE_TX_REQ_HS); + dphy_wait_pll_locked(ctx); + } + + sprd_dpu_run(dpu); + + 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 = to_sprd_crtc(encoder->crtc); + struct dsi_context *ctx = &dsi->ctx; + + if (!ctx->enabled) { + drm_warn(dsi->drm, "dsi isn't initialized\n"); + return; + } + + sprd_dpu_stop(dpu); + sprd_dsi_set_work_mode(ctx, DSI_MODE_CMD); + sprd_dsi_lp_cmd_enable(ctx); + + if (dsi->panel) { + drm_panel_disable(dsi->panel); + drm_panel_unprepare(dsi->panel); + } + + sprd_dphy_fini(ctx); + sprd_dsi_fini(ctx); + + 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_dbg(dsi->drm, "%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 struct sprd_dsi *sprd_dsi_encoder_init(struct drm_device *drm, + struct device *dev) +{ + struct sprd_dsi *dsi; + u32 crtc_mask; + + crtc_mask = drm_of_find_possible_crtcs(drm, dev->of_node); + if (!crtc_mask) { + drm_err(drm, "failed to find crtc mask\n"); + return ERR_PTR(-EINVAL); + } + + drm_dbg(drm, "find possible crtcs: 0x%08x\n", crtc_mask); + + dsi = drmm_encoder_alloc(drm, struct sprd_dsi, encoder, + &sprd_encoder_funcs, DRM_MODE_ENCODER_DSI, NULL); + if (IS_ERR(dsi)) { + drm_err(drm, "failed to init dsi encoder.\n"); + return dsi; + } + + dsi->encoder.possible_crtcs = crtc_mask; + drm_encoder_helper_add(&dsi->encoder, &sprd_encoder_helper_funcs); + + return dsi; +} + +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 (!IS_ERR(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 (!IS_ERR(panel)) { + dsi->panel = panel; + return 0; + } + } + + drm_err(dsi->drm, "of_drm_find_panel() failed\n"); + return -ENODEV; +} + +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; + + 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; + + 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->ctx, 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->ctx, 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_err(dsi->drm, "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_dbg(dsi->drm, "%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_add(dsi->panel); + 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_err(drm, "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_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; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctx->base = devm_ioremap(dev, res->start, resource_size(res)); + if (!ctx->base) { + drm_err(dsi->drm, "failed to map dsi host registers\n"); + return -ENXIO; + } + + ctx->pll = devm_kzalloc(dev, sizeof(*ctx->pll), GFP_KERNEL); + if (!ctx->pll) + return -ENOMEM; + + ctx->regmap = devm_regmap_init(dev, ®map_tst_io, dsi, &byte_config); + if (IS_ERR(ctx->regmap)) { + drm_err(dsi->drm, "dphy regmap init failed\n"); + return PTR_ERR(ctx->regmap); + } + + 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; + ctx->enabled = true; + + return 0; +} + +static int sprd_dsi_bind(struct device *dev, struct device *master, void *data) +{ + struct drm_device *drm = data; + struct sprd_dsi *dsi; + int ret; + + dsi = sprd_dsi_encoder_init(drm, dev); + if (IS_ERR(dsi)) + return PTR_ERR(dsi); + + dsi->drm = drm; + dev_set_drvdata(dev, dsi); + + ret = sprd_dsi_connector_init(drm, dsi); + if (ret) + return ret; + + ret = sprd_dsi_context_init(dsi, dev); + if (ret) + return ret; + + ret = sprd_dsi_host_init(dsi, dev); + if (ret) + return ret; + + return 0; +} + +static void sprd_dsi_unbind(struct device *dev, + struct device *master, void *data) +{ + struct sprd_dsi *dsi = dev_get_drvdata(dev); + + mipi_dsi_host_unregister(&dsi->host); +} + +static const struct component_ops dsi_component_ops = { + .bind = sprd_dsi_bind, + .unbind = sprd_dsi_unbind, +}; + +static const struct of_device_id dsi_match_table[] = { + { .compatible = "sprd,sharkl3-dsi-host" }, + { /* sentinel */ }, +}; + +static int sprd_dsi_probe(struct platform_device *pdev) +{ + 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 000000000..16628fb5c --- /dev/null +++ b/drivers/gpu/drm/sprd/sprd_dsi.h @@ -0,0 +1,94 @@ +/* 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 <linux/regmap.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> + +#include "megacores_pll.h" + +#define encoder_to_dsi(encoder) \ + container_of(encoder, struct sprd_dsi, encoder) + +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 { + void __iomem *base; + struct regmap *regmap; + struct dphy_pll *pll; + struct videomode vm; + bool enabled; + + u8 work_mode; + u8 burst_mode; + + u32 int0_mask; + u32 int1_mask; + + /* 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; + /* 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; +}; + +struct sprd_dsi { + struct drm_device *drm; + struct mipi_dsi_host host; + struct mipi_dsi_device *slave; + struct drm_encoder encoder; + struct drm_connector connector; + struct drm_panel *panel; + struct drm_display_mode *mode; + struct dsi_context ctx; +}; + +#endif /* __SPRD_DSI_H__ */