| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Philippe Cornu | 3863 | 82.79% | 8 | 34.78% |
| Nickey Yang | 331 | 7.09% | 1 | 4.35% |
| Matt Redfearn | 197 | 4.22% | 1 | 4.35% |
| Heiko Stübner | 112 | 2.40% | 3 | 13.04% |
| Brian Norris | 77 | 1.65% | 4 | 17.39% |
| Yannick Fertre | 58 | 1.24% | 1 | 4.35% |
| Benjamin Gaignard | 9 | 0.19% | 1 | 4.35% |
| Laurent Pinchart | 9 | 0.19% | 1 | 4.35% |
| Sam Ravnborg | 8 | 0.17% | 1 | 4.35% |
| Daniel Vetter | 1 | 0.02% | 1 | 4.35% |
| Bhumika Goyal | 1 | 0.02% | 1 | 4.35% |
| Total | 4666 | 23 |
// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd * Copyright (C) STMicroelectronics SA 2017 * * Modified by Philippe Cornu <philippe.cornu@st.com> * This generic Synopsys DesignWare MIPI DSI host driver is based on the * Rockchip version from rockchip/dw-mipi-dsi.c with phy & bridge APIs. */ #include <linux/clk.h> #include <linux/component.h> #include <linux/debugfs.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #include <video/mipi_display.h> #include <drm/bridge/dw_mipi_dsi.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_modes.h> #include <drm/drm_of.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> #define HWVER_131 0x31333100 /* IP version 1.31 */ #define DSI_VERSION 0x00 #define VERSION GENMASK(31, 8) #define DSI_PWR_UP 0x04 #define RESET 0 #define POWERUP BIT(0) #define DSI_CLKMGR_CFG 0x08 #define TO_CLK_DIVISION(div) (((div) & 0xff) << 8) #define TX_ESC_CLK_DIVISION(div) ((div) & 0xff) #define DSI_DPI_VCID 0x0c #define DPI_VCID(vcid) ((vcid) & 0x3) #define DSI_DPI_COLOR_CODING 0x10 #define LOOSELY18_EN BIT(8) #define DPI_COLOR_CODING_16BIT_1 0x0 #define DPI_COLOR_CODING_16BIT_2 0x1 #define DPI_COLOR_CODING_16BIT_3 0x2 #define DPI_COLOR_CODING_18BIT_1 0x3 #define DPI_COLOR_CODING_18BIT_2 0x4 #define DPI_COLOR_CODING_24BIT 0x5 #define DSI_DPI_CFG_POL 0x14 #define COLORM_ACTIVE_LOW BIT(4) #define SHUTD_ACTIVE_LOW BIT(3) #define HSYNC_ACTIVE_LOW BIT(2) #define VSYNC_ACTIVE_LOW BIT(1) #define DATAEN_ACTIVE_LOW BIT(0) #define DSI_DPI_LP_CMD_TIM 0x18 #define OUTVACT_LPCMD_TIME(p) (((p) & 0xff) << 16) #define INVACT_LPCMD_TIME(p) ((p) & 0xff) #define DSI_DBI_VCID 0x1c #define DSI_DBI_CFG 0x20 #define DSI_DBI_PARTITIONING_EN 0x24 #define DSI_DBI_CMDSIZE 0x28 #define DSI_PCKHDL_CFG 0x2c #define CRC_RX_EN BIT(4) #define ECC_RX_EN BIT(3) #define BTA_EN BIT(2) #define EOTP_RX_EN BIT(1) #define EOTP_TX_EN BIT(0) #define DSI_GEN_VCID 0x30 #define DSI_MODE_CFG 0x34 #define ENABLE_VIDEO_MODE 0 #define ENABLE_CMD_MODE BIT(0) #define DSI_VID_MODE_CFG 0x38 #define ENABLE_LOW_POWER (0x3f << 8) #define ENABLE_LOW_POWER_MASK (0x3f << 8) #define VID_MODE_TYPE_NON_BURST_SYNC_PULSES 0x0 #define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS 0x1 #define VID_MODE_TYPE_BURST 0x2 #define VID_MODE_TYPE_MASK 0x3 #define VID_MODE_VPG_ENABLE BIT(16) #define VID_MODE_VPG_HORIZONTAL BIT(24) #define DSI_VID_PKT_SIZE 0x3c #define VID_PKT_SIZE(p) ((p) & 0x3fff) #define DSI_VID_NUM_CHUNKS 0x40 #define VID_NUM_CHUNKS(c) ((c) & 0x1fff) #define DSI_VID_NULL_SIZE 0x44 #define VID_NULL_SIZE(b) ((b) & 0x1fff) #define DSI_VID_HSA_TIME 0x48 #define DSI_VID_HBP_TIME 0x4c #define DSI_VID_HLINE_TIME 0x50 #define DSI_VID_VSA_LINES 0x54 #define DSI_VID_VBP_LINES 0x58 #define DSI_VID_VFP_LINES 0x5c #define DSI_VID_VACTIVE_LINES 0x60 #define DSI_EDPI_CMD_SIZE 0x64 #define DSI_CMD_MODE_CFG 0x68 #define MAX_RD_PKT_SIZE_LP BIT(24) #define DCS_LW_TX_LP BIT(19) #define DCS_SR_0P_TX_LP BIT(18) #define DCS_SW_1P_TX_LP BIT(17) #define DCS_SW_0P_TX_LP BIT(16) #define GEN_LW_TX_LP BIT(14) #define GEN_SR_2P_TX_LP BIT(13) #define GEN_SR_1P_TX_LP BIT(12) #define GEN_SR_0P_TX_LP BIT(11) #define GEN_SW_2P_TX_LP BIT(10) #define GEN_SW_1P_TX_LP BIT(9) #define GEN_SW_0P_TX_LP BIT(8) #define ACK_RQST_EN BIT(1) #define TEAR_FX_EN BIT(0) #define CMD_MODE_ALL_LP (MAX_RD_PKT_SIZE_LP | \ DCS_LW_TX_LP | \ DCS_SR_0P_TX_LP | \ DCS_SW_1P_TX_LP | \ DCS_SW_0P_TX_LP | \ GEN_LW_TX_LP | \ GEN_SR_2P_TX_LP | \ GEN_SR_1P_TX_LP | \ GEN_SR_0P_TX_LP | \ GEN_SW_2P_TX_LP | \ GEN_SW_1P_TX_LP | \ GEN_SW_0P_TX_LP) #define DSI_GEN_HDR 0x6c #define DSI_GEN_PLD_DATA 0x70 #define DSI_CMD_PKT_STATUS 0x74 #define GEN_RD_CMD_BUSY BIT(6) #define GEN_PLD_R_FULL BIT(5) #define GEN_PLD_R_EMPTY BIT(4) #define GEN_PLD_W_FULL BIT(3) #define GEN_PLD_W_EMPTY BIT(2) #define GEN_CMD_FULL BIT(1) #define GEN_CMD_EMPTY BIT(0) #define DSI_TO_CNT_CFG 0x78 #define HSTX_TO_CNT(p) (((p) & 0xffff) << 16) #define LPRX_TO_CNT(p) ((p) & 0xffff) #define DSI_HS_RD_TO_CNT 0x7c #define DSI_LP_RD_TO_CNT 0x80 #define DSI_HS_WR_TO_CNT 0x84 #define DSI_LP_WR_TO_CNT 0x88 #define DSI_BTA_TO_CNT 0x8c #define DSI_LPCLK_CTRL 0x94 #define AUTO_CLKLANE_CTRL BIT(1) #define PHY_TXREQUESTCLKHS BIT(0) #define DSI_PHY_TMR_LPCLK_CFG 0x98 #define PHY_CLKHS2LP_TIME(lbcc) (((lbcc) & 0x3ff) << 16) #define PHY_CLKLP2HS_TIME(lbcc) ((lbcc) & 0x3ff) #define DSI_PHY_TMR_CFG 0x9c #define PHY_HS2LP_TIME(lbcc) (((lbcc) & 0xff) << 24) #define PHY_LP2HS_TIME(lbcc) (((lbcc) & 0xff) << 16) #define MAX_RD_TIME(lbcc) ((lbcc) & 0x7fff) #define PHY_HS2LP_TIME_V131(lbcc) (((lbcc) & 0x3ff) << 16) #define PHY_LP2HS_TIME_V131(lbcc) ((lbcc) & 0x3ff) #define DSI_PHY_RSTZ 0xa0 #define PHY_DISFORCEPLL 0 #define PHY_ENFORCEPLL BIT(3) #define PHY_DISABLECLK 0 #define PHY_ENABLECLK BIT(2) #define PHY_RSTZ 0 #define PHY_UNRSTZ BIT(1) #define PHY_SHUTDOWNZ 0 #define PHY_UNSHUTDOWNZ BIT(0) #define DSI_PHY_IF_CFG 0xa4 #define PHY_STOP_WAIT_TIME(cycle) (((cycle) & 0xff) << 8) #define N_LANES(n) (((n) - 1) & 0x3) #define DSI_PHY_ULPS_CTRL 0xa8 #define DSI_PHY_TX_TRIGGERS 0xac #define DSI_PHY_STATUS 0xb0 #define PHY_STOP_STATE_CLK_LANE BIT(2) #define PHY_LOCK BIT(0) #define DSI_PHY_TST_CTRL0 0xb4 #define PHY_TESTCLK BIT(1) #define PHY_UNTESTCLK 0 #define PHY_TESTCLR BIT(0) #define PHY_UNTESTCLR 0 #define DSI_PHY_TST_CTRL1 0xb8 #define PHY_TESTEN BIT(16) #define PHY_UNTESTEN 0 #define PHY_TESTDOUT(n) (((n) & 0xff) << 8) #define PHY_TESTDIN(n) ((n) & 0xff) #define DSI_INT_ST0 0xbc #define DSI_INT_ST1 0xc0 #define DSI_INT_MSK0 0xc4 #define DSI_INT_MSK1 0xc8 #define DSI_PHY_TMR_RD_CFG 0xf4 #define MAX_RD_TIME_V131(lbcc) ((lbcc) & 0x7fff) #define PHY_STATUS_TIMEOUT_US 10000 #define CMD_PKT_STATUS_TIMEOUT_US 20000 struct dw_mipi_dsi { struct drm_bridge bridge; struct mipi_dsi_host dsi_host; struct drm_bridge *panel_bridge; struct device *dev; void __iomem *base; struct clk *pclk; unsigned int lane_mbps; /* per lane */ u32 channel; u32 lanes; u32 format; unsigned long mode_flags; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs; bool vpg; bool vpg_horizontal; #endif /* CONFIG_DEBUG_FS */ struct dw_mipi_dsi *master; /* dual-dsi master ptr */ struct dw_mipi_dsi *slave; /* dual-dsi slave ptr */ const struct dw_mipi_dsi_plat_data *plat_data; }; /* * Check if either a link to a master or slave is present */ static inline bool dw_mipi_is_dual_mode(struct dw_mipi_dsi *dsi) { return dsi->slave || dsi->master; } /* * The controller should generate 2 frames before * preparing the peripheral. */ static void dw_mipi_dsi_wait_for_two_frames(const struct drm_display_mode *mode) { int refresh, two_frames; refresh = drm_mode_vrefresh(mode); two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2; msleep(two_frames); } static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host) { return container_of(host, struct dw_mipi_dsi, dsi_host); } static inline struct dw_mipi_dsi *bridge_to_dsi(struct drm_bridge *bridge) { return container_of(bridge, struct dw_mipi_dsi, bridge); } static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val) { writel(val, dsi->base + reg); } static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg) { return readl(dsi->base + reg); } static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { struct dw_mipi_dsi *dsi = host_to_dsi(host); const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data; struct drm_bridge *bridge; struct drm_panel *panel; int ret; if (device->lanes > dsi->plat_data->max_data_lanes) { dev_err(dsi->dev, "the number of data lanes(%u) is too many\n", device->lanes); return -EINVAL; } dsi->lanes = device->lanes; dsi->channel = device->channel; dsi->format = device->format; dsi->mode_flags = device->mode_flags; ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0, &panel, &bridge); if (ret) return ret; if (panel) { bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DSI); if (IS_ERR(bridge)) return PTR_ERR(bridge); } dsi->panel_bridge = bridge; drm_bridge_add(&dsi->bridge); if (pdata->host_ops && pdata->host_ops->attach) { ret = pdata->host_ops->attach(pdata->priv_data, device); if (ret < 0) return ret; } return 0; } static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { struct dw_mipi_dsi *dsi = host_to_dsi(host); const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data; int ret; if (pdata->host_ops && pdata->host_ops->detach) { ret = pdata->host_ops->detach(pdata->priv_data, device); if (ret < 0) return ret; } drm_of_panel_bridge_remove(host->dev->of_node, 1, 0); drm_bridge_remove(&dsi->bridge); return 0; } static void dw_mipi_message_config(struct dw_mipi_dsi *dsi, const struct mipi_dsi_msg *msg) { bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM; u32 val = 0; if (msg->flags & MIPI_DSI_MSG_REQ_ACK) val |= ACK_RQST_EN; if (lpm) val |= CMD_MODE_ALL_LP; dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS); dsi_write(dsi, DSI_CMD_MODE_CFG, val); } static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val) { int ret; u32 val, mask; ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS, val, !(val & GEN_CMD_FULL), 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret) { dev_err(dsi->dev, "failed to get available command FIFO\n"); return ret; } dsi_write(dsi, DSI_GEN_HDR, hdr_val); mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY; ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS, val, (val & mask) == mask, 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret) { dev_err(dsi->dev, "failed to write command FIFO\n"); return ret; } return 0; } static int dw_mipi_dsi_write(struct dw_mipi_dsi *dsi, const struct mipi_dsi_packet *packet) { const u8 *tx_buf = packet->payload; int len = packet->payload_length, pld_data_bytes = sizeof(u32), ret; __le32 word; u32 val; while (len) { if (len < pld_data_bytes) { word = 0; memcpy(&word, tx_buf, len); dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word)); len = 0; } else { memcpy(&word, tx_buf, pld_data_bytes); dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word)); tx_buf += pld_data_bytes; len -= pld_data_bytes; } ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS, val, !(val & GEN_PLD_W_FULL), 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret) { dev_err(dsi->dev, "failed to get available write payload FIFO\n"); return ret; } } word = 0; memcpy(&word, packet->header, sizeof(packet->header)); return dw_mipi_dsi_gen_pkt_hdr_write(dsi, le32_to_cpu(word)); } static int dw_mipi_dsi_read(struct dw_mipi_dsi *dsi, const struct mipi_dsi_msg *msg) { int i, j, ret, len = msg->rx_len; u8 *buf = msg->rx_buf; u32 val; /* Wait end of the read operation */ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS, val, !(val & GEN_RD_CMD_BUSY), 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret) { dev_err(dsi->dev, "Timeout during read operation\n"); return ret; } for (i = 0; i < len; i += 4) { /* Read fifo must not be empty before all bytes are read */ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS, val, !(val & GEN_PLD_R_EMPTY), 1000, CMD_PKT_STATUS_TIMEOUT_US); if (ret) { dev_err(dsi->dev, "Read payload FIFO is empty\n"); return ret; } val = dsi_read(dsi, DSI_GEN_PLD_DATA); for (j = 0; j < 4 && j + i < len; j++) buf[i + j] = val >> (8 * j); } return ret; } static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host, const struct mipi_dsi_msg *msg) { struct dw_mipi_dsi *dsi = host_to_dsi(host); struct mipi_dsi_packet packet; int ret, nb_bytes; ret = mipi_dsi_create_packet(&packet, msg); if (ret) { dev_err(dsi->dev, "failed to create packet: %d\n", ret); return ret; } dw_mipi_message_config(dsi, msg); if (dsi->slave) dw_mipi_message_config(dsi->slave, msg); ret = dw_mipi_dsi_write(dsi, &packet); if (ret) return ret; if (dsi->slave) { ret = dw_mipi_dsi_write(dsi->slave, &packet); if (ret) return ret; } if (msg->rx_buf && msg->rx_len) { ret = dw_mipi_dsi_read(dsi, msg); if (ret) return ret; nb_bytes = msg->rx_len; } else { nb_bytes = packet.size; } return nb_bytes; } static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = { .attach = dw_mipi_dsi_host_attach, .detach = dw_mipi_dsi_host_detach, .transfer = dw_mipi_dsi_host_transfer, }; static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi) { u32 val; /* * TODO dw drv improvements * enabling low power is panel-dependent, we should use the * panel configuration here... */ val = ENABLE_LOW_POWER; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) val |= VID_MODE_TYPE_BURST; else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES; else val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS; #ifdef CONFIG_DEBUG_FS if (dsi->vpg) { val |= VID_MODE_VPG_ENABLE; val |= dsi->vpg_horizontal ? VID_MODE_VPG_HORIZONTAL : 0; } #endif /* CONFIG_DEBUG_FS */ dsi_write(dsi, DSI_VID_MODE_CFG, val); } static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi, unsigned long mode_flags) { dsi_write(dsi, DSI_PWR_UP, RESET); if (mode_flags & MIPI_DSI_MODE_VIDEO) { dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE); dw_mipi_dsi_video_mode_config(dsi); dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS); } else { dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE); } dsi_write(dsi, DSI_PWR_UP, POWERUP); } static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi) { dsi_write(dsi, DSI_PWR_UP, RESET); dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ); } static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi) { /* * The maximum permitted escape clock is 20MHz and it is derived from * lanebyteclk, which is running at "lane_mbps / 8". Thus we want: * * (lane_mbps >> 3) / esc_clk_division < 20 * which is: * (lane_mbps >> 3) / 20 > esc_clk_division */ u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1; dsi_write(dsi, DSI_PWR_UP, RESET); /* * TODO dw drv improvements * timeout clock division should be computed with the * high speed transmission counter timeout and byte lane... */ dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVISION(10) | TX_ESC_CLK_DIVISION(esc_clk_division)); } static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode) { u32 val = 0, color = 0; switch (dsi->format) { case MIPI_DSI_FMT_RGB888: color = DPI_COLOR_CODING_24BIT; break; case MIPI_DSI_FMT_RGB666: color = DPI_COLOR_CODING_18BIT_2 | LOOSELY18_EN; break; case MIPI_DSI_FMT_RGB666_PACKED: color = DPI_COLOR_CODING_18BIT_1; break; case MIPI_DSI_FMT_RGB565: color = DPI_COLOR_CODING_16BIT_1; break; } if (mode->flags & DRM_MODE_FLAG_NVSYNC) val |= VSYNC_ACTIVE_LOW; if (mode->flags & DRM_MODE_FLAG_NHSYNC) val |= HSYNC_ACTIVE_LOW; dsi_write(dsi, DSI_DPI_VCID, DPI_VCID(dsi->channel)); dsi_write(dsi, DSI_DPI_COLOR_CODING, color); dsi_write(dsi, DSI_DPI_CFG_POL, val); /* * TODO dw drv improvements * largest packet sizes during hfp or during vsa/vpb/vfp * should be computed according to byte lane, lane number and only * if sending lp cmds in high speed is enable (PHY_TXREQUESTCLKHS) */ dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4) | INVACT_LPCMD_TIME(4)); } static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi) { dsi_write(dsi, DSI_PCKHDL_CFG, CRC_RX_EN | ECC_RX_EN | BTA_EN); } static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode) { /* * TODO dw drv improvements * only burst mode is supported here. For non-burst video modes, * we should compute DSI_VID_PKT_SIZE, DSI_VCCR.NUMC & * DSI_VNPCR.NPSIZE... especially because this driver supports * non-burst video modes, see dw_mipi_dsi_video_mode_config()... */ dsi_write(dsi, DSI_VID_PKT_SIZE, dw_mipi_is_dual_mode(dsi) ? VID_PKT_SIZE(mode->hdisplay / 2) : VID_PKT_SIZE(mode->hdisplay)); } static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi) { /* * TODO dw drv improvements * compute high speed transmission counter timeout according * to the timeout clock division (TO_CLK_DIVISION) and byte lane... */ dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000)); /* * TODO dw drv improvements * the Bus-Turn-Around Timeout Counter should be computed * according to byte lane... */ dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00); dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE); } /* Get lane byte clock cycles. */ static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode, u32 hcomponent) { u32 frac, lbcc; lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8; frac = lbcc % mode->clock; lbcc = lbcc / mode->clock; if (frac) lbcc++; return lbcc; } static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode) { u32 htotal, hsa, hbp, lbcc; htotal = mode->htotal; hsa = mode->hsync_end - mode->hsync_start; hbp = mode->htotal - mode->hsync_end; /* * TODO dw drv improvements * computations below may be improved... */ lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal); dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc); lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa); dsi_write(dsi, DSI_VID_HSA_TIME, lbcc); lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp); dsi_write(dsi, DSI_VID_HBP_TIME, lbcc); } static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode) { u32 vactive, vsa, vfp, vbp; vactive = mode->vdisplay; vsa = mode->vsync_end - mode->vsync_start; vfp = mode->vsync_start - mode->vdisplay; vbp = mode->vtotal - mode->vsync_end; dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive); dsi_write(dsi, DSI_VID_VSA_LINES, vsa); dsi_write(dsi, DSI_VID_VFP_LINES, vfp); dsi_write(dsi, DSI_VID_VBP_LINES, vbp); } static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi) { u32 hw_version; /* * TODO dw drv improvements * data & clock lane timers should be computed according to panel * blankings and to the automatic clock lane control mode... * note: DSI_PHY_TMR_CFG.MAX_RD_TIME should be in line with * DSI_CMD_MODE_CFG.MAX_RD_PKT_SIZE_LP (see CMD_MODE_ALL_LP) */ hw_version = dsi_read(dsi, DSI_VERSION) & VERSION; if (hw_version >= HWVER_131) { dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME_V131(0x40) | PHY_LP2HS_TIME_V131(0x40)); dsi_write(dsi, DSI_PHY_TMR_RD_CFG, MAX_RD_TIME_V131(10000)); } else { dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40) | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000)); } dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40) | PHY_CLKLP2HS_TIME(0x40)); } static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi) { /* * TODO dw drv improvements * stop wait time should be the maximum between host dsi * and panel stop wait times */ dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) | N_LANES(dsi->lanes)); } static void dw_mipi_dsi_dphy_init(struct dw_mipi_dsi *dsi) { /* Clear PHY state */ dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK | PHY_RSTZ | PHY_SHUTDOWNZ); dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR); dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR); dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR); } static void dw_mipi_dsi_dphy_enable(struct dw_mipi_dsi *dsi) { u32 val; int ret; dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK | PHY_UNRSTZ | PHY_UNSHUTDOWNZ); ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS, val, val & PHY_LOCK, 1000, PHY_STATUS_TIMEOUT_US); if (ret) DRM_DEBUG_DRIVER("failed to wait phy lock state\n"); ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS, val, val & PHY_STOP_STATE_CLK_LANE, 1000, PHY_STATUS_TIMEOUT_US); if (ret) DRM_DEBUG_DRIVER("failed to wait phy clk lane stop state\n"); } static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi) { dsi_read(dsi, DSI_INT_ST0); dsi_read(dsi, DSI_INT_ST1); dsi_write(dsi, DSI_INT_MSK0, 0); dsi_write(dsi, DSI_INT_MSK1, 0); } static void dw_mipi_dsi_bridge_post_disable(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; if (phy_ops->power_off) phy_ops->power_off(dsi->plat_data->priv_data); /* * Switch to command mode before panel-bridge post_disable & * panel unprepare. * Note: panel-bridge disable & panel disable has been called * before by the drm framework. */ dw_mipi_dsi_set_mode(dsi, 0); /* * TODO Only way found to call panel-bridge post_disable & * panel unprepare before the dsi "final" disable... * This needs to be fixed in the drm_bridge framework and the API * needs to be updated to manage our own call chains... */ dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge); if (dsi->slave) { dw_mipi_dsi_disable(dsi->slave); clk_disable_unprepare(dsi->slave->pclk); pm_runtime_put(dsi->slave->dev); } dw_mipi_dsi_disable(dsi); clk_disable_unprepare(dsi->pclk); pm_runtime_put(dsi->dev); } static unsigned int dw_mipi_dsi_get_lanes(struct dw_mipi_dsi *dsi) { /* this instance is the slave, so add the master's lanes */ if (dsi->master) return dsi->master->lanes + dsi->lanes; /* this instance is the master, so add the slave's lanes */ if (dsi->slave) return dsi->lanes + dsi->slave->lanes; /* single-dsi, so no other instance to consider */ return dsi->lanes; } static void dw_mipi_dsi_mode_set(struct dw_mipi_dsi *dsi, const struct drm_display_mode *adjusted_mode) { const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; void *priv_data = dsi->plat_data->priv_data; int ret; u32 lanes = dw_mipi_dsi_get_lanes(dsi); clk_prepare_enable(dsi->pclk); ret = phy_ops->get_lane_mbps(priv_data, adjusted_mode, dsi->mode_flags, lanes, dsi->format, &dsi->lane_mbps); if (ret) DRM_DEBUG_DRIVER("Phy get_lane_mbps() failed\n"); pm_runtime_get_sync(dsi->dev); dw_mipi_dsi_init(dsi); dw_mipi_dsi_dpi_config(dsi, adjusted_mode); dw_mipi_dsi_packet_handler_config(dsi); dw_mipi_dsi_video_mode_config(dsi); dw_mipi_dsi_video_packet_config(dsi, adjusted_mode); dw_mipi_dsi_command_mode_config(dsi); dw_mipi_dsi_line_timer_config(dsi, adjusted_mode); dw_mipi_dsi_vertical_timing_config(dsi, adjusted_mode); dw_mipi_dsi_dphy_init(dsi); dw_mipi_dsi_dphy_timing_config(dsi); dw_mipi_dsi_dphy_interface_config(dsi); dw_mipi_dsi_clear_err(dsi); ret = phy_ops->init(priv_data); if (ret) DRM_DEBUG_DRIVER("Phy init() failed\n"); dw_mipi_dsi_dphy_enable(dsi); dw_mipi_dsi_wait_for_two_frames(adjusted_mode); /* Switch to cmd mode for panel-bridge pre_enable & panel prepare */ dw_mipi_dsi_set_mode(dsi, 0); } static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); dw_mipi_dsi_mode_set(dsi, adjusted_mode); if (dsi->slave) dw_mipi_dsi_mode_set(dsi->slave, adjusted_mode); } static void dw_mipi_dsi_bridge_enable(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops; /* Switch to video mode for panel-bridge enable & panel enable */ dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO); if (dsi->slave) dw_mipi_dsi_set_mode(dsi->slave, MIPI_DSI_MODE_VIDEO); if (phy_ops->power_on) phy_ops->power_on(dsi->plat_data->priv_data); } static enum drm_mode_status dw_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_mode *mode) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data; enum drm_mode_status mode_status = MODE_OK; if (pdata->mode_valid) mode_status = pdata->mode_valid(pdata->priv_data, mode); return mode_status; } static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge) { struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge); if (!bridge->encoder) { DRM_ERROR("Parent encoder object not found\n"); return -ENODEV; } /* Set the encoder type as caller does not know it */ bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI; /* Attach the panel-bridge to the dsi bridge */ return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge); } static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = { .mode_set = dw_mipi_dsi_bridge_mode_set, .enable = dw_mipi_dsi_bridge_enable, .post_disable = dw_mipi_dsi_bridge_post_disable, .mode_valid = dw_mipi_dsi_bridge_mode_valid, .attach = dw_mipi_dsi_bridge_attach, }; #ifdef CONFIG_DEBUG_FS static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi) { dsi->debugfs = debugfs_create_dir(dev_name(dsi->dev), NULL); if (IS_ERR(dsi->debugfs)) { dev_err(dsi->dev, "failed to create debugfs root\n"); return; } debugfs_create_bool("vpg", 0660, dsi->debugfs, &dsi->vpg); debugfs_create_bool("vpg_horizontal", 0660, dsi->debugfs, &dsi->vpg_horizontal); } static void dw_mipi_dsi_debugfs_remove(struct dw_mipi_dsi *dsi) { debugfs_remove_recursive(dsi->debugfs); } #else static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi) { } static void dw_mipi_dsi_debugfs_remove(struct dw_mipi_dsi *dsi) { } #endif /* CONFIG_DEBUG_FS */ static struct dw_mipi_dsi * __dw_mipi_dsi_probe(struct platform_device *pdev, const struct dw_mipi_dsi_plat_data *plat_data) { struct device *dev = &pdev->dev; struct reset_control *apb_rst; struct dw_mipi_dsi *dsi; struct resource *res; int ret; dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); if (!dsi) return ERR_PTR(-ENOMEM); dsi->dev = dev; dsi->plat_data = plat_data; if (!plat_data->phy_ops->init || !plat_data->phy_ops->get_lane_mbps) { DRM_ERROR("Phy not properly configured\n"); return ERR_PTR(-ENODEV); } if (!plat_data->base) { res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return ERR_PTR(-ENODEV); dsi->base = devm_ioremap_resource(dev, res); if (IS_ERR(dsi->base)) return ERR_PTR(-ENODEV); } else { dsi->base = plat_data->base; } dsi->pclk = devm_clk_get(dev, "pclk"); if (IS_ERR(dsi->pclk)) { ret = PTR_ERR(dsi->pclk); dev_err(dev, "Unable to get pclk: %d\n", ret); return ERR_PTR(ret); } /* * Note that the reset was not defined in the initial device tree, so * we have to be prepared for it not being found. */ apb_rst = devm_reset_control_get_optional_exclusive(dev, "apb"); if (IS_ERR(apb_rst)) { ret = PTR_ERR(apb_rst); if (ret != -EPROBE_DEFER) dev_err(dev, "Unable to get reset control: %d\n", ret); return ERR_PTR(ret); } if (apb_rst) { ret = clk_prepare_enable(dsi->pclk); if (ret) { dev_err(dev, "%s: Failed to enable pclk\n", __func__); return ERR_PTR(ret); } reset_control_assert(apb_rst); usleep_range(10, 20); reset_control_deassert(apb_rst); clk_disable_unprepare(dsi->pclk); } dw_mipi_dsi_debugfs_init(dsi); pm_runtime_enable(dev); dsi->dsi_host.ops = &dw_mipi_dsi_host_ops; dsi->dsi_host.dev = dev; ret = mipi_dsi_host_register(&dsi->dsi_host); if (ret) { dev_err(dev, "Failed to register MIPI host: %d\n", ret); dw_mipi_dsi_debugfs_remove(dsi); return ERR_PTR(ret); } dsi->bridge.driver_private = dsi; dsi->bridge.funcs = &dw_mipi_dsi_bridge_funcs; #ifdef CONFIG_OF dsi->bridge.of_node = pdev->dev.of_node; #endif return dsi; } static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi) { mipi_dsi_host_unregister(&dsi->dsi_host); pm_runtime_disable(dsi->dev); dw_mipi_dsi_debugfs_remove(dsi); } void dw_mipi_dsi_set_slave(struct dw_mipi_dsi *dsi, struct dw_mipi_dsi *slave) { /* introduce controllers to each other */ dsi->slave = slave; dsi->slave->master = dsi; /* migrate settings for already attached displays */ dsi->slave->lanes = dsi->lanes; dsi->slave->channel = dsi->channel; dsi->slave->format = dsi->format; dsi->slave->mode_flags = dsi->mode_flags; } EXPORT_SYMBOL_GPL(dw_mipi_dsi_set_slave); /* * Probe/remove API, used from platforms based on the DRM bridge API. */ struct dw_mipi_dsi * dw_mipi_dsi_probe(struct platform_device *pdev, const struct dw_mipi_dsi_plat_data *plat_data) { return __dw_mipi_dsi_probe(pdev, plat_data); } EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe); void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi) { __dw_mipi_dsi_remove(dsi); } EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove); /* * Bind/unbind API, used from platforms based on the component framework. */ int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder) { int ret; ret = drm_bridge_attach(encoder, &dsi->bridge, NULL); if (ret) { DRM_ERROR("Failed to initialize bridge with drm\n"); return ret; } return ret; } EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind); void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi) { } EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind); MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>"); MODULE_DESCRIPTION("DW MIPI DSI host controller driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:dw-mipi-dsi");
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