// SPDX-License-Identifier: GPL-2.0-only /* * Copyright © 2019-2020 Intel Corporation */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "kmb_dsi.h" #include "kmb_regs.h" static struct mipi_dsi_host *dsi_host; static struct mipi_dsi_device *dsi_device; static struct drm_bridge *adv_bridge; /* Default setting is 1080p, 4 lanes */ #define IMG_HEIGHT_LINES 1080 #define IMG_WIDTH_PX 1920 #define MIPI_TX_ACTIVE_LANES 4 static 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 }; static 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 }; static const 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, }; static 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 const 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 const 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 void kmb_dsi_clk_disable(struct kmb_dsi *kmb_dsi) { clk_disable_unprepare(kmb_dsi->clk_mipi); clk_disable_unprepare(kmb_dsi->clk_mipi_ecfg); clk_disable_unprepare(kmb_dsi->clk_mipi_cfg); } void kmb_dsi_host_unregister(struct kmb_dsi *kmb_dsi) { kmb_dsi_clk_disable(kmb_dsi); mipi_dsi_host_unregister(kmb_dsi->host); } /* * This DSI can only be paired with bridges that do config through i2c * which is ADV 7535 in the KMB EVM */ 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, }; int kmb_dsi_host_bridge_init(struct device *dev) { struct device_node *encoder_node, *dsi_out; /* Create and register MIPI DSI host */ if (!dsi_host) { dsi_host = kzalloc(sizeof(*dsi_host), GFP_KERNEL); if (!dsi_host) return -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 -ENOMEM; } } dsi_host->dev = dev; mipi_dsi_host_register(dsi_host); } /* Find ADV7535 node and initialize it */ dsi_out = of_graph_get_endpoint_by_regs(dev->of_node, 0, 1); if (!dsi_out) { DRM_ERROR("Failed to get dsi_out node info from DT\n"); return -EINVAL; } encoder_node = of_graph_get_remote_port_parent(dsi_out); if (!encoder_node) { of_node_put(dsi_out); DRM_ERROR("Failed to get bridge info from DT\n"); return -EINVAL; } /* Locate drm bridge from the hdmi encoder DT node */ adv_bridge = of_drm_find_bridge(encoder_node); of_node_put(dsi_out); of_node_put(encoder_node); if (!adv_bridge) { DRM_DEBUG("Wait for external bridge driver DT\n"); return -EPROBE_DEFER; } return 0; } 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_dsi *kmb_dsi, 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; dev_dbg(kmb_dsi->dev, "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_dsi, (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_dsi, reg_adr, (section % 2) * 16, 16, unpacked_bytes); dev_dbg(kmb_dsi->dev, "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_dsi, reg_adr, height_lines); return 0; } static u32 mipi_tx_fg_section_cfg(struct kmb_dsi *kmb_dsi, 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_dsi, 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; } #define CLK_DIFF_LOW 50 #define CLK_DIFF_HI 60 #define SYSCLK_500 500 static void mipi_tx_fg_cfg_regs(struct kmb_dsi *kmb_dsi, 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 */ if (kmb_dsi->sys_clk_mhz == SYSCLK_500) { sysclk = kmb_dsi->sys_clk_mhz - CLK_DIFF_LOW; } else { /* 700 Mhz clk*/ sysclk = kmb_dsi->sys_clk_mhz - CLK_DIFF_HI; } /* 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); dev_dbg(kmb_dsi->dev, "ppl_llp_ratio=%d\n", ppl_llp_ratio); dev_dbg(kmb_dsi->dev, "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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, reg_adr, val); /* llp hsync width */ reg_adr = MIPI_TXm_HS_LLP_HSYNC_WIDTHn(ctrl_no, frame_gen); kmb_write_mipi(kmb_dsi, 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_dsi, 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_dsi, reg_adr, fg_cfg->h_frontporch * (fg_cfg->bpp / 8)); } static void mipi_tx_fg_cfg(struct kmb_dsi *kmb_dsi, 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_dsi, frame_gen, &fg_t_cfg); } static void mipi_tx_multichannel_fifo_cfg(struct kmb_dsi *kmb_dsi, 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_dsi, MIPI_TX_HS_MC_FIFO_CTRL_EN, 0); kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC0, 0); kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_CHAN_ALLOC1, 0); kmb_write_mipi(kmb_dsi, MIPI_TX_HS_MC_FIFO_RTHRESHOLD0, 0); kmb_write_mipi(kmb_dsi, 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_dsi, 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_dsi, ctrl_no, vchannel_id, fifo_rthreshold); /* Enable the MC FIFO channel corresponding to the Virtual Channel */ kmb_set_bit_mipi(kmb_dsi, MIPI_TXm_HS_MC_FIFO_CTRL_EN(ctrl_no), vchannel_id); } static void mipi_tx_ctrl_cfg(struct kmb_dsi *kmb_dsi, 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); dev_dbg(kmb_dsi->dev, "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_dsi, MIPI_TXm_HS_SYNC_CFG(ctrl_no), sync_cfg); kmb_write_mipi(kmb_dsi, MIPI_TXm_HS_CTRL(ctrl_no), ctrl); } static u32 mipi_tx_init_cntrl(struct kmb_dsi *kmb_dsi, 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_dsi, frame_id, sect, frame->sections[sect], &bits_per_pclk, &word_count); if (ret) return ret; } /* Set frame specific parameters */ mipi_tx_fg_cfg(kmb_dsi, 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_dsi, ctrl_cfg->active_lanes, frame_id); /* Frame Generator Enable */ mipi_tx_ctrl_cfg(kmb_dsi, frame_id, ctrl_cfg); return ret; } static void test_mode_send(struct kmb_dsi *kmb_dsi, 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_dsi, dphy_no); /* Set testdin */ SET_TEST_DIN0_3(kmb_dsi, dphy_no, test_code); /* Set testen high */ SET_DPHY_TEST_CTRL1_EN(kmb_dsi, dphy_no); /* Set testclk low */ CLR_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no); /* Set testen low */ CLR_DPHY_TEST_CTRL1_EN(kmb_dsi, 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_dsi, dphy_no); /* Set testclk low */ CLR_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no); /* Set data in testdin */ kmb_write_mipi(kmb_dsi, DPHY_TEST_DIN0_3 + ((dphy_no / 0x4) * 0x4), test_data << ((dphy_no % 4) * 8)); /* Set testclk high */ SET_DPHY_TEST_CTRL1_CLK(kmb_dsi, dphy_no); } } static inline __maybe_unused void set_test_mode_src_osc_freq_target_low_bits(struct kmb_dsi *kmb_dsi, u32 dphy_no, u32 freq) { /* Typical rise/fall time=166, refer Table 1207 databook, * sr_osc_freq_target[7:0] */ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_SLEW_RATE_DDL_CYCLES, (freq & 0x7f)); } static inline __maybe_unused void set_test_mode_src_osc_freq_target_hi_bits(struct kmb_dsi *kmb_dsi, 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_dsi, 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_dsi *kmb_dsi, 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_dsi, dphy_no, TEST_CODE_PLL_VCO_CTRL, (vco_p.range | (1 << 6))); /* Program m, n pll parameters */ dev_dbg(kmb_dsi->dev, "m = %d n = %d\n", best_m, best_n); /* PLL_Input_Divider_Ratio[3:0] = pll_n_ovr */ test_mode_send(kmb_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, dphy_no, TEST_CODE_PLL_GMP_CTRL, 0x10); /* pll_cpbias_cntrl-fixed value for cpbias_cntrl from DPHY doc */ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_CHARGE_PUMP_BIAS, 0x10); /* pll_th1 -Lock Detector Phase error threshold, * document gives fixed value */ test_mode_send(kmb_dsi, 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_dsi, dphy_no, TEST_CODE_PLL_LOCK_FILTER, 0x60); /* pll_th3- PLL Unlocking filter, document gives fixed value */ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_UNLOCK_FILTER, 0x03); /* pll_lock_sel-PLL Lock Detector Selection, * document gives fixed value */ test_mode_send(kmb_dsi, dphy_no, TEST_CODE_PLL_LOCK_DETECTOR, 0x02); } static void set_slewrate_gt_1500(struct kmb_dsi *kmb_dsi, 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_dsi, 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_dsi, dphy_no, test_code, test_data); } static void set_slewrate_gt_1000(struct kmb_dsi *kmb_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, dphy_no, test_code, test_data); } static void set_slewrate_lt_1000(struct kmb_dsi *kmb_dsi, 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_dsi, 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_dsi, 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_dsi, 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_dsi, dphy_no, test_code, test_data); } static void setup_pll(struct kmb_dsi *kmb_dsi, 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_dsi, dphy_no, test_code, test_data); /* PLL Parameters Setup */ mipi_tx_pll_setup(kmb_dsi, dphy_no, cfg->ref_clk_khz / 1000, cfg->lane_rate_mbps / 2); /* Set clksel */ kmb_write_bits_mipi(kmb_dsi, DPHY_INIT_CTRL1, PLL_CLKSEL_0, 2, 0x01); /* Set pll_shadow_control */ kmb_set_bit_mipi(kmb_dsi, DPHY_INIT_CTRL1, PLL_SHADOW_CTRL); } static void set_lane_data_rate(struct kmb_dsi *kmb_dsi, 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_dsi, dphy_no, test_code, test_data); break; } } static void dphy_init_sequence(struct kmb_dsi *kmb_dsi, 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_dsi, dphy_no, RESETZ); /* Assert SHUTDOWNZ signal */ CLR_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, SHUTDOWNZ); val = kmb_read_mipi(kmb_dsi, 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_dsi, dphy_no); ndelay(15); SET_DPHY_TEST_CTRL0(kmb_dsi, dphy_no); ndelay(15); CLR_DPHY_TEST_CTRL0(kmb_dsi, 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_dsi, dphy_no, test_code, test_data); /* Set the lane data rate */ set_lane_data_rate(kmb_dsi, 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_dsi, dphy_no); else if (cfg->lane_rate_mbps > 1000) set_slewrate_gt_1000(kmb_dsi, dphy_no); else set_slewrate_lt_1000(kmb_dsi, dphy_no); /* Set cfgclkfreqrange */ val = (((cfg->cfg_clk_khz / 1000) - 17) * 4) & 0x3f; SET_DPHY_FREQ_CTRL0_3(kmb_dsi, dphy_no, val); /* Enable config clk for the corresponding d-phy */ kmb_set_bit_mipi(kmb_dsi, DPHY_CFG_CLK_EN, dphy_no); /* PLL setup */ if (mode == MIPI_DPHY_MASTER) setup_pll(kmb_dsi, dphy_no, cfg); /* Send NORMAL OPERATION test code */ test_code = 0x0; test_data = 0x0; test_mode_send(kmb_dsi, 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_dsi, 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_dsi, DPHY_INIT_CTRL2, 12 + dphy_no); /* Enable DATA LANES */ kmb_write_bits_mipi(kmb_dsi, 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_dsi, dphy_no, SHUTDOWNZ); ndelay(15); /* Deassert RSTZ signal */ SET_DPHY_INIT_CTRL0(kmb_dsi, dphy_no, RESETZ); } static void dphy_wait_fsm(struct kmb_dsi *kmb_dsi, 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_dsi, dphy_no, TEST_CODE_FSM_CONTROL, 0x80); val = GET_TEST_DOUT4_7(kmb_dsi, dphy_no); i++; if (i > TIMEOUT) { status = 0; break; } } while (val != fsm_state); dev_dbg(kmb_dsi->dev, "%s: dphy %d val = %x", __func__, dphy_no, val); dev_dbg(kmb_dsi->dev, "* DPHY %d WAIT_FSM %s *", dphy_no, status ? "SUCCESS" : "FAILED"); } static void wait_init_done(struct kmb_dsi *kmb_dsi, u32 dphy_no, u32 active_lanes) { u32 stopstatedata = 0; u32 data_lanes = (1 << active_lanes) - 1; int i = 0; int status = 1; do { stopstatedata = GET_STOPSTATE_DATA(kmb_dsi, dphy_no) & data_lanes; /* TODO-need to add a time out and return failure */ i++; if (i > TIMEOUT) { status = 0; dev_dbg(kmb_dsi->dev, "! WAIT_INIT_DONE: TIMING OUT!(err_stat=%d)", kmb_read_mipi(kmb_dsi, MIPI_DPHY_ERR_STAT6_7)); break; } } while (stopstatedata != data_lanes); dev_dbg(kmb_dsi->dev, "* DPHY %d INIT - %s *", dphy_no, status ? "SUCCESS" : "FAILED"); } static void wait_pll_lock(struct kmb_dsi *kmb_dsi, 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; dev_dbg(kmb_dsi->dev, "%s: timing out", __func__); break; } } while (!GET_PLL_LOCK(kmb_dsi, dphy_no)); dev_dbg(kmb_dsi->dev, "* PLL Locked for DPHY %d - %s *", dphy_no, status ? "SUCCESS" : "FAILED"); } static u32 mipi_tx_init_dphy(struct kmb_dsi *kmb_dsi, 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_dsi, cfg, dphy_no + 1, (cfg->active_lanes - MIPI_DPHY_D_LANES), MIPI_DPHY_SLAVE); dphy_wait_fsm(kmb_dsi, dphy_no + 1, DPHY_TX_LOCK); /* PHY #N master */ dphy_init_sequence(kmb_dsi, cfg, dphy_no, MIPI_DPHY_D_LANES, MIPI_DPHY_MASTER); /* Wait for DPHY init to complete */ wait_init_done(kmb_dsi, dphy_no, MIPI_DPHY_D_LANES); wait_init_done(kmb_dsi, dphy_no + 1, cfg->active_lanes - MIPI_DPHY_D_LANES); wait_pll_lock(kmb_dsi, dphy_no); wait_pll_lock(kmb_dsi, dphy_no + 1); dphy_wait_fsm(kmb_dsi, dphy_no, DPHY_TX_IDLE); } else { /* Single DPHY */ dphy_init_sequence(kmb_dsi, cfg, dphy_no, cfg->active_lanes, MIPI_DPHY_MASTER); dphy_wait_fsm(kmb_dsi, dphy_no, DPHY_TX_IDLE); wait_init_done(kmb_dsi, dphy_no, cfg->active_lanes); wait_pll_lock(kmb_dsi, dphy_no); } return 0; } static void connect_lcd_to_mipi(struct kmb_dsi *kmb_dsi, struct drm_atomic_state *old_state) { struct regmap *msscam; msscam = syscon_regmap_lookup_by_compatible("intel,keembay-msscam"); if (IS_ERR(msscam)) { dev_dbg(kmb_dsi->dev, "failed to get msscam syscon"); return; } drm_atomic_bridge_chain_enable(adv_bridge, old_state); /* DISABLE MIPI->CIF CONNECTION */ regmap_write(msscam, MSS_MIPI_CIF_CFG, 0); /* ENABLE LCD->MIPI CONNECTION */ regmap_write(msscam, MSS_LCD_MIPI_CFG, 1); /* DISABLE LCD->CIF LOOPBACK */ regmap_write(msscam, MSS_LOOPBACK_CFG, 1); } int kmb_dsi_mode_set(struct kmb_dsi *kmb_dsi, struct drm_display_mode *mode, int sys_clk_mhz, struct drm_atomic_state *old_state) { u64 data_rate; kmb_dsi->sys_clk_mhz = sys_clk_mhz; 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; dev_dbg(kmb_dsi->dev, "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; } /* Initialize mipi controller */ mipi_tx_init_cntrl(kmb_dsi, &mipi_tx_init_cfg); /* Dphy initialization */ mipi_tx_init_dphy(kmb_dsi, &mipi_tx_init_cfg); connect_lcd_to_mipi(kmb_dsi, old_state); dev_info(kmb_dsi->dev, "mipi hw initialized"); return 0; } struct kmb_dsi *kmb_dsi_init(struct platform_device *pdev) { struct kmb_dsi *kmb_dsi; struct device *dev = get_device(&pdev->dev); kmb_dsi = devm_kzalloc(dev, sizeof(*kmb_dsi), GFP_KERNEL); if (!kmb_dsi) { dev_err(dev, "failed to allocate kmb_dsi\n"); return ERR_PTR(-ENOMEM); } kmb_dsi->host = dsi_host; kmb_dsi->host->ops = &kmb_dsi_host_ops; dsi_device->host = kmb_dsi->host; kmb_dsi->device = dsi_device; return kmb_dsi; } int kmb_dsi_encoder_init(struct drm_device *dev, struct kmb_dsi *kmb_dsi) { struct drm_encoder *encoder; struct drm_connector *connector; int ret = 0; encoder = &kmb_dsi->base; encoder->possible_crtcs = 1; encoder->possible_clones = 0; ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DSI); if (ret) { dev_err(kmb_dsi->dev, "Failed to init encoder %d\n", ret); return ret; } /* Link drm_bridge to encoder */ ret = drm_bridge_attach(encoder, adv_bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret) { 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; } int kmb_dsi_map_mmio(struct kmb_dsi *kmb_dsi) { struct resource *res; struct device *dev = kmb_dsi->dev; res = platform_get_resource_byname(kmb_dsi->pdev, IORESOURCE_MEM, "mipi"); if (!res) { dev_err(dev, "failed to get resource for mipi"); return -ENOMEM; } kmb_dsi->mipi_mmio = devm_ioremap_resource(dev, res); if (IS_ERR(kmb_dsi->mipi_mmio)) { dev_err(dev, "failed to ioremap mipi registers"); return PTR_ERR(kmb_dsi->mipi_mmio); } return 0; } static int kmb_dsi_clk_enable(struct kmb_dsi *kmb_dsi) { int ret; struct device *dev = kmb_dsi->dev; ret = clk_prepare_enable(kmb_dsi->clk_mipi); if (ret) { dev_err(dev, "Failed to enable MIPI clock: %d\n", ret); return ret; } ret = clk_prepare_enable(kmb_dsi->clk_mipi_ecfg); if (ret) { dev_err(dev, "Failed to enable MIPI_ECFG clock: %d\n", ret); return ret; } ret = clk_prepare_enable(kmb_dsi->clk_mipi_cfg); if (ret) { dev_err(dev, "Failed to enable MIPI_CFG clock: %d\n", ret); return ret; } dev_info(dev, "SUCCESS : enabled MIPI clocks\n"); return 0; } int kmb_dsi_clk_init(struct kmb_dsi *kmb_dsi) { struct device *dev = kmb_dsi->dev; unsigned long clk; kmb_dsi->clk_mipi = devm_clk_get(dev, "clk_mipi"); if (IS_ERR(kmb_dsi->clk_mipi)) { dev_err(dev, "devm_clk_get() failed clk_mipi\n"); return PTR_ERR(kmb_dsi->clk_mipi); } kmb_dsi->clk_mipi_ecfg = devm_clk_get(dev, "clk_mipi_ecfg"); if (IS_ERR(kmb_dsi->clk_mipi_ecfg)) { dev_err(dev, "devm_clk_get() failed clk_mipi_ecfg\n"); return PTR_ERR(kmb_dsi->clk_mipi_ecfg); } kmb_dsi->clk_mipi_cfg = devm_clk_get(dev, "clk_mipi_cfg"); if (IS_ERR(kmb_dsi->clk_mipi_cfg)) { dev_err(dev, "devm_clk_get() failed clk_mipi_cfg\n"); return PTR_ERR(kmb_dsi->clk_mipi_cfg); } /* Set MIPI clock to 24 Mhz */ clk_set_rate(kmb_dsi->clk_mipi, KMB_MIPI_DEFAULT_CLK); if (clk_get_rate(kmb_dsi->clk_mipi) != KMB_MIPI_DEFAULT_CLK) { dev_err(dev, "failed to set to clk_mipi to %d\n", KMB_MIPI_DEFAULT_CLK); return -1; } dev_dbg(dev, "clk_mipi = %ld\n", clk_get_rate(kmb_dsi->clk_mipi)); clk = clk_get_rate(kmb_dsi->clk_mipi_ecfg); if (clk != KMB_MIPI_DEFAULT_CFG_CLK) { /* Set MIPI_ECFG clock to 24 Mhz */ clk_set_rate(kmb_dsi->clk_mipi_ecfg, KMB_MIPI_DEFAULT_CFG_CLK); clk = clk_get_rate(kmb_dsi->clk_mipi_ecfg); if (clk != KMB_MIPI_DEFAULT_CFG_CLK) { dev_err(dev, "failed to set to clk_mipi_ecfg to %d\n", KMB_MIPI_DEFAULT_CFG_CLK); return -1; } } clk = clk_get_rate(kmb_dsi->clk_mipi_cfg); if (clk != KMB_MIPI_DEFAULT_CFG_CLK) { /* Set MIPI_CFG clock to 24 Mhz */ clk_set_rate(kmb_dsi->clk_mipi_cfg, 24000000); clk = clk_get_rate(kmb_dsi->clk_mipi_cfg); if (clk != KMB_MIPI_DEFAULT_CFG_CLK) { dev_err(dev, "failed to set clk_mipi_cfg to %d\n", KMB_MIPI_DEFAULT_CFG_CLK); return -1; } } return kmb_dsi_clk_enable(kmb_dsi); }