| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Boris Brezillon | 5377 | 86.89% | 2 | 13.33% |
| Maxime Ripard | 652 | 10.54% | 2 | 13.33% |
| Jayshri Pawar | 124 | 2.00% | 1 | 6.67% |
| Laurent Pinchart | 13 | 0.21% | 3 | 20.00% |
| Nishanth Menon | 7 | 0.11% | 1 | 6.67% |
| Sam Ravnborg | 5 | 0.08% | 1 | 6.67% |
| Daniel Vetter | 4 | 0.06% | 1 | 6.67% |
| Nicolas Boichat | 2 | 0.03% | 1 | 6.67% |
| caihuoqing | 2 | 0.03% | 1 | 6.67% |
| Thierry Reding | 1 | 0.02% | 1 | 6.67% |
| Zou Wei | 1 | 0.02% | 1 | 6.67% |
| Total | 6188 | 15 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright: 2017 Cadence Design Systems, Inc. * * Author: Boris Brezillon <boris.brezillon@bootlin.com> */ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_drv.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_panel.h> #include <drm/drm_probe_helper.h> #include <video/mipi_display.h> #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #include <linux/phy/phy.h> #include <linux/phy/phy-mipi-dphy.h> #define IP_CONF 0x0 #define SP_HS_FIFO_DEPTH(x) (((x) & GENMASK(30, 26)) >> 26) #define SP_LP_FIFO_DEPTH(x) (((x) & GENMASK(25, 21)) >> 21) #define VRS_FIFO_DEPTH(x) (((x) & GENMASK(20, 16)) >> 16) #define DIRCMD_FIFO_DEPTH(x) (((x) & GENMASK(15, 13)) >> 13) #define SDI_IFACE_32 BIT(12) #define INTERNAL_DATAPATH_32 (0 << 10) #define INTERNAL_DATAPATH_16 (1 << 10) #define INTERNAL_DATAPATH_8 (3 << 10) #define INTERNAL_DATAPATH_SIZE ((x) & GENMASK(11, 10)) #define NUM_IFACE(x) ((((x) & GENMASK(9, 8)) >> 8) + 1) #define MAX_LANE_NB(x) (((x) & GENMASK(7, 6)) >> 6) #define RX_FIFO_DEPTH(x) ((x) & GENMASK(5, 0)) #define MCTL_MAIN_DATA_CTL 0x4 #define TE_MIPI_POLLING_EN BIT(25) #define TE_HW_POLLING_EN BIT(24) #define DISP_EOT_GEN BIT(18) #define HOST_EOT_GEN BIT(17) #define DISP_GEN_CHECKSUM BIT(16) #define DISP_GEN_ECC BIT(15) #define BTA_EN BIT(14) #define READ_EN BIT(13) #define REG_TE_EN BIT(12) #define IF_TE_EN(x) BIT(8 + (x)) #define TVG_SEL BIT(6) #define VID_EN BIT(5) #define IF_VID_SELECT(x) ((x) << 2) #define IF_VID_SELECT_MASK GENMASK(3, 2) #define IF_VID_MODE BIT(1) #define LINK_EN BIT(0) #define MCTL_MAIN_PHY_CTL 0x8 #define HS_INVERT_DAT(x) BIT(19 + ((x) * 2)) #define SWAP_PINS_DAT(x) BIT(18 + ((x) * 2)) #define HS_INVERT_CLK BIT(17) #define SWAP_PINS_CLK BIT(16) #define HS_SKEWCAL_EN BIT(15) #define WAIT_BURST_TIME(x) ((x) << 10) #define DATA_ULPM_EN(x) BIT(6 + (x)) #define CLK_ULPM_EN BIT(5) #define CLK_CONTINUOUS BIT(4) #define DATA_LANE_EN(x) BIT((x) - 1) #define MCTL_MAIN_EN 0xc #define DATA_FORCE_STOP BIT(17) #define CLK_FORCE_STOP BIT(16) #define IF_EN(x) BIT(13 + (x)) #define DATA_LANE_ULPM_REQ(l) BIT(9 + (l)) #define CLK_LANE_ULPM_REQ BIT(8) #define DATA_LANE_START(x) BIT(4 + (x)) #define CLK_LANE_EN BIT(3) #define PLL_START BIT(0) #define MCTL_DPHY_CFG0 0x10 #define DPHY_C_RSTB BIT(20) #define DPHY_D_RSTB(x) GENMASK(15 + (x), 16) #define DPHY_PLL_PDN BIT(10) #define DPHY_CMN_PDN BIT(9) #define DPHY_C_PDN BIT(8) #define DPHY_D_PDN(x) GENMASK(3 + (x), 4) #define DPHY_ALL_D_PDN GENMASK(7, 4) #define DPHY_PLL_PSO BIT(1) #define DPHY_CMN_PSO BIT(0) #define MCTL_DPHY_TIMEOUT1 0x14 #define HSTX_TIMEOUT(x) ((x) << 4) #define HSTX_TIMEOUT_MAX GENMASK(17, 0) #define CLK_DIV(x) (x) #define CLK_DIV_MAX GENMASK(3, 0) #define MCTL_DPHY_TIMEOUT2 0x18 #define LPRX_TIMEOUT(x) (x) #define MCTL_ULPOUT_TIME 0x1c #define DATA_LANE_ULPOUT_TIME(x) ((x) << 9) #define CLK_LANE_ULPOUT_TIME(x) (x) #define MCTL_3DVIDEO_CTL 0x20 #define VID_VSYNC_3D_EN BIT(7) #define VID_VSYNC_3D_LR BIT(5) #define VID_VSYNC_3D_SECOND_EN BIT(4) #define VID_VSYNC_3DFORMAT_LINE (0 << 2) #define VID_VSYNC_3DFORMAT_FRAME (1 << 2) #define VID_VSYNC_3DFORMAT_PIXEL (2 << 2) #define VID_VSYNC_3DMODE_OFF 0 #define VID_VSYNC_3DMODE_PORTRAIT 1 #define VID_VSYNC_3DMODE_LANDSCAPE 2 #define MCTL_MAIN_STS 0x24 #define MCTL_MAIN_STS_CTL 0x130 #define MCTL_MAIN_STS_CLR 0x150 #define MCTL_MAIN_STS_FLAG 0x170 #define HS_SKEWCAL_DONE BIT(11) #define IF_UNTERM_PKT_ERR(x) BIT(8 + (x)) #define LPRX_TIMEOUT_ERR BIT(7) #define HSTX_TIMEOUT_ERR BIT(6) #define DATA_LANE_RDY(l) BIT(2 + (l)) #define CLK_LANE_RDY BIT(1) #define PLL_LOCKED BIT(0) #define MCTL_DPHY_ERR 0x28 #define MCTL_DPHY_ERR_CTL1 0x148 #define MCTL_DPHY_ERR_CLR 0x168 #define MCTL_DPHY_ERR_FLAG 0x188 #define ERR_CONT_LP(x, l) BIT(18 + ((x) * 4) + (l)) #define ERR_CONTROL(l) BIT(14 + (l)) #define ERR_SYNESC(l) BIT(10 + (l)) #define ERR_ESC(l) BIT(6 + (l)) #define MCTL_DPHY_ERR_CTL2 0x14c #define ERR_CONT_LP_EDGE(x, l) BIT(12 + ((x) * 4) + (l)) #define ERR_CONTROL_EDGE(l) BIT(8 + (l)) #define ERR_SYN_ESC_EDGE(l) BIT(4 + (l)) #define ERR_ESC_EDGE(l) BIT(0 + (l)) #define MCTL_LANE_STS 0x2c #define PPI_C_TX_READY_HS BIT(18) #define DPHY_PLL_LOCK BIT(17) #define PPI_D_RX_ULPS_ESC(x) (((x) & GENMASK(15, 12)) >> 12) #define LANE_STATE_START 0 #define LANE_STATE_IDLE 1 #define LANE_STATE_WRITE 2 #define LANE_STATE_ULPM 3 #define LANE_STATE_READ 4 #define DATA_LANE_STATE(l, val) \ (((val) >> (2 + 2 * (l) + ((l) ? 1 : 0))) & GENMASK((l) ? 1 : 2, 0)) #define CLK_LANE_STATE_HS 2 #define CLK_LANE_STATE(val) ((val) & GENMASK(1, 0)) #define DSC_MODE_CTL 0x30 #define DSC_MODE_EN BIT(0) #define DSC_CMD_SEND 0x34 #define DSC_SEND_PPS BIT(0) #define DSC_EXECUTE_QUEUE BIT(1) #define DSC_PPS_WRDAT 0x38 #define DSC_MODE_STS 0x3c #define DSC_PPS_DONE BIT(1) #define DSC_EXEC_DONE BIT(2) #define CMD_MODE_CTL 0x70 #define IF_LP_EN(x) BIT(9 + (x)) #define IF_VCHAN_ID(x, c) ((c) << ((x) * 2)) #define CMD_MODE_CTL2 0x74 #define TE_TIMEOUT(x) ((x) << 11) #define FILL_VALUE(x) ((x) << 3) #define ARB_IF_WITH_HIGHEST_PRIORITY(x) ((x) << 1) #define ARB_ROUND_ROBIN_MODE BIT(0) #define CMD_MODE_STS 0x78 #define CMD_MODE_STS_CTL 0x134 #define CMD_MODE_STS_CLR 0x154 #define CMD_MODE_STS_FLAG 0x174 #define ERR_IF_UNDERRUN(x) BIT(4 + (x)) #define ERR_UNWANTED_READ BIT(3) #define ERR_TE_MISS BIT(2) #define ERR_NO_TE BIT(1) #define CSM_RUNNING BIT(0) #define DIRECT_CMD_SEND 0x80 #define DIRECT_CMD_MAIN_SETTINGS 0x84 #define TRIGGER_VAL(x) ((x) << 25) #define CMD_LP_EN BIT(24) #define CMD_SIZE(x) ((x) << 16) #define CMD_VCHAN_ID(x) ((x) << 14) #define CMD_DATATYPE(x) ((x) << 8) #define CMD_LONG BIT(3) #define WRITE_CMD 0 #define READ_CMD 1 #define TE_REQ 4 #define TRIGGER_REQ 5 #define BTA_REQ 6 #define DIRECT_CMD_STS 0x88 #define DIRECT_CMD_STS_CTL 0x138 #define DIRECT_CMD_STS_CLR 0x158 #define DIRECT_CMD_STS_FLAG 0x178 #define RCVD_ACK_VAL(val) ((val) >> 16) #define RCVD_TRIGGER_VAL(val) (((val) & GENMASK(14, 11)) >> 11) #define READ_COMPLETED_WITH_ERR BIT(10) #define BTA_FINISHED BIT(9) #define BTA_COMPLETED BIT(8) #define TE_RCVD BIT(7) #define TRIGGER_RCVD BIT(6) #define ACK_WITH_ERR_RCVD BIT(5) #define ACK_RCVD BIT(4) #define READ_COMPLETED BIT(3) #define TRIGGER_COMPLETED BIT(2) #define WRITE_COMPLETED BIT(1) #define SENDING_CMD BIT(0) #define DIRECT_CMD_STOP_READ 0x8c #define DIRECT_CMD_WRDATA 0x90 #define DIRECT_CMD_FIFO_RST 0x94 #define DIRECT_CMD_RDDATA 0xa0 #define DIRECT_CMD_RD_PROPS 0xa4 #define RD_DCS BIT(18) #define RD_VCHAN_ID(val) (((val) >> 16) & GENMASK(1, 0)) #define RD_SIZE(val) ((val) & GENMASK(15, 0)) #define DIRECT_CMD_RD_STS 0xa8 #define DIRECT_CMD_RD_STS_CTL 0x13c #define DIRECT_CMD_RD_STS_CLR 0x15c #define DIRECT_CMD_RD_STS_FLAG 0x17c #define ERR_EOT_WITH_ERR BIT(8) #define ERR_MISSING_EOT BIT(7) #define ERR_WRONG_LENGTH BIT(6) #define ERR_OVERSIZE BIT(5) #define ERR_RECEIVE BIT(4) #define ERR_UNDECODABLE BIT(3) #define ERR_CHECKSUM BIT(2) #define ERR_UNCORRECTABLE BIT(1) #define ERR_FIXED BIT(0) #define VID_MAIN_CTL 0xb0 #define VID_IGNORE_MISS_VSYNC BIT(31) #define VID_FIELD_SW BIT(28) #define VID_INTERLACED_EN BIT(27) #define RECOVERY_MODE(x) ((x) << 25) #define RECOVERY_MODE_NEXT_HSYNC 0 #define RECOVERY_MODE_NEXT_STOP_POINT 2 #define RECOVERY_MODE_NEXT_VSYNC 3 #define REG_BLKEOL_MODE(x) ((x) << 23) #define REG_BLKLINE_MODE(x) ((x) << 21) #define REG_BLK_MODE_NULL_PKT 0 #define REG_BLK_MODE_BLANKING_PKT 1 #define REG_BLK_MODE_LP 2 #define SYNC_PULSE_HORIZONTAL BIT(20) #define SYNC_PULSE_ACTIVE BIT(19) #define BURST_MODE BIT(18) #define VID_PIXEL_MODE_MASK GENMASK(17, 14) #define VID_PIXEL_MODE_RGB565 (0 << 14) #define VID_PIXEL_MODE_RGB666_PACKED (1 << 14) #define VID_PIXEL_MODE_RGB666 (2 << 14) #define VID_PIXEL_MODE_RGB888 (3 << 14) #define VID_PIXEL_MODE_RGB101010 (4 << 14) #define VID_PIXEL_MODE_RGB121212 (5 << 14) #define VID_PIXEL_MODE_YUV420 (8 << 14) #define VID_PIXEL_MODE_YUV422_PACKED (9 << 14) #define VID_PIXEL_MODE_YUV422 (10 << 14) #define VID_PIXEL_MODE_YUV422_24B (11 << 14) #define VID_PIXEL_MODE_DSC_COMP (12 << 14) #define VID_DATATYPE(x) ((x) << 8) #define VID_VIRTCHAN_ID(iface, x) ((x) << (4 + (iface) * 2)) #define STOP_MODE(x) ((x) << 2) #define START_MODE(x) (x) #define VID_VSIZE1 0xb4 #define VFP_LEN(x) ((x) << 12) #define VBP_LEN(x) ((x) << 6) #define VSA_LEN(x) (x) #define VID_VSIZE2 0xb8 #define VACT_LEN(x) (x) #define VID_HSIZE1 0xc0 #define HBP_LEN(x) ((x) << 16) #define HSA_LEN(x) (x) #define VID_HSIZE2 0xc4 #define HFP_LEN(x) ((x) << 16) #define HACT_LEN(x) (x) #define VID_BLKSIZE1 0xcc #define BLK_EOL_PKT_LEN(x) ((x) << 15) #define BLK_LINE_EVENT_PKT_LEN(x) (x) #define VID_BLKSIZE2 0xd0 #define BLK_LINE_PULSE_PKT_LEN(x) (x) #define VID_PKT_TIME 0xd8 #define BLK_EOL_DURATION(x) (x) #define VID_DPHY_TIME 0xdc #define REG_WAKEUP_TIME(x) ((x) << 17) #define REG_LINE_DURATION(x) (x) #define VID_ERR_COLOR1 0xe0 #define COL_GREEN(x) ((x) << 12) #define COL_RED(x) (x) #define VID_ERR_COLOR2 0xe4 #define PAD_VAL(x) ((x) << 12) #define COL_BLUE(x) (x) #define VID_VPOS 0xe8 #define LINE_VAL(val) (((val) & GENMASK(14, 2)) >> 2) #define LINE_POS(val) ((val) & GENMASK(1, 0)) #define VID_HPOS 0xec #define HORIZ_VAL(val) (((val) & GENMASK(17, 3)) >> 3) #define HORIZ_POS(val) ((val) & GENMASK(2, 0)) #define VID_MODE_STS 0xf0 #define VID_MODE_STS_CTL 0x140 #define VID_MODE_STS_CLR 0x160 #define VID_MODE_STS_FLAG 0x180 #define VSG_RECOVERY BIT(10) #define ERR_VRS_WRONG_LEN BIT(9) #define ERR_LONG_READ BIT(8) #define ERR_LINE_WRITE BIT(7) #define ERR_BURST_WRITE BIT(6) #define ERR_SMALL_HEIGHT BIT(5) #define ERR_SMALL_LEN BIT(4) #define ERR_MISSING_VSYNC BIT(3) #define ERR_MISSING_HSYNC BIT(2) #define ERR_MISSING_DATA BIT(1) #define VSG_RUNNING BIT(0) #define VID_VCA_SETTING1 0xf4 #define BURST_LP BIT(16) #define MAX_BURST_LIMIT(x) (x) #define VID_VCA_SETTING2 0xf8 #define MAX_LINE_LIMIT(x) ((x) << 16) #define EXACT_BURST_LIMIT(x) (x) #define TVG_CTL 0xfc #define TVG_STRIPE_SIZE(x) ((x) << 5) #define TVG_MODE_MASK GENMASK(4, 3) #define TVG_MODE_SINGLE_COLOR (0 << 3) #define TVG_MODE_VSTRIPES (2 << 3) #define TVG_MODE_HSTRIPES (3 << 3) #define TVG_STOPMODE_MASK GENMASK(2, 1) #define TVG_STOPMODE_EOF (0 << 1) #define TVG_STOPMODE_EOL (1 << 1) #define TVG_STOPMODE_NOW (2 << 1) #define TVG_RUN BIT(0) #define TVG_IMG_SIZE 0x100 #define TVG_NBLINES(x) ((x) << 16) #define TVG_LINE_SIZE(x) (x) #define TVG_COLOR1 0x104 #define TVG_COL1_GREEN(x) ((x) << 12) #define TVG_COL1_RED(x) (x) #define TVG_COLOR1_BIS 0x108 #define TVG_COL1_BLUE(x) (x) #define TVG_COLOR2 0x10c #define TVG_COL2_GREEN(x) ((x) << 12) #define TVG_COL2_RED(x) (x) #define TVG_COLOR2_BIS 0x110 #define TVG_COL2_BLUE(x) (x) #define TVG_STS 0x114 #define TVG_STS_CTL 0x144 #define TVG_STS_CLR 0x164 #define TVG_STS_FLAG 0x184 #define TVG_STS_RUNNING BIT(0) #define STS_CTL_EDGE(e) ((e) << 16) #define DPHY_LANES_MAP 0x198 #define DAT_REMAP_CFG(b, l) ((l) << ((b) * 8)) #define DPI_IRQ_EN 0x1a0 #define DPI_IRQ_CLR 0x1a4 #define DPI_IRQ_STS 0x1a8 #define PIXEL_BUF_OVERFLOW BIT(0) #define DPI_CFG 0x1ac #define DPI_CFG_FIFO_DEPTH(x) ((x) >> 16) #define DPI_CFG_FIFO_LEVEL(x) ((x) & GENMASK(15, 0)) #define TEST_GENERIC 0x1f0 #define TEST_STATUS(x) ((x) >> 16) #define TEST_CTRL(x) (x) #define ID_REG 0x1fc #define REV_VENDOR_ID(x) (((x) & GENMASK(31, 20)) >> 20) #define REV_PRODUCT_ID(x) (((x) & GENMASK(19, 12)) >> 12) #define REV_HW(x) (((x) & GENMASK(11, 8)) >> 8) #define REV_MAJOR(x) (((x) & GENMASK(7, 4)) >> 4) #define REV_MINOR(x) ((x) & GENMASK(3, 0)) #define DSI_OUTPUT_PORT 0 #define DSI_INPUT_PORT(inputid) (1 + (inputid)) #define DSI_HBP_FRAME_OVERHEAD 12 #define DSI_HSA_FRAME_OVERHEAD 14 #define DSI_HFP_FRAME_OVERHEAD 6 #define DSI_HSS_VSS_VSE_FRAME_OVERHEAD 4 #define DSI_BLANKING_FRAME_OVERHEAD 6 #define DSI_NULL_FRAME_OVERHEAD 6 #define DSI_EOT_PKT_SIZE 4 struct cdns_dsi_output { struct mipi_dsi_device *dev; struct drm_panel *panel; struct drm_bridge *bridge; union phy_configure_opts phy_opts; }; enum cdns_dsi_input_id { CDNS_SDI_INPUT, CDNS_DPI_INPUT, CDNS_DSC_INPUT, }; struct cdns_dsi_cfg { unsigned int hfp; unsigned int hsa; unsigned int hbp; unsigned int hact; unsigned int htotal; }; struct cdns_dsi_input { enum cdns_dsi_input_id id; struct drm_bridge bridge; }; struct cdns_dsi { struct mipi_dsi_host base; void __iomem *regs; struct cdns_dsi_input input; struct cdns_dsi_output output; unsigned int direct_cmd_fifo_depth; unsigned int rx_fifo_depth; struct completion direct_cmd_comp; struct clk *dsi_p_clk; struct reset_control *dsi_p_rst; struct clk *dsi_sys_clk; bool link_initialized; bool phy_initialized; struct phy *dphy; }; static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input) { return container_of(input, struct cdns_dsi, input); } static inline struct cdns_dsi *to_cdns_dsi(struct mipi_dsi_host *host) { return container_of(host, struct cdns_dsi, base); } static inline struct cdns_dsi_input * bridge_to_cdns_dsi_input(struct drm_bridge *bridge) { return container_of(bridge, struct cdns_dsi_input, bridge); } static unsigned int mode_to_dpi_hfp(const struct drm_display_mode *mode, bool mode_valid_check) { if (mode_valid_check) return mode->hsync_start - mode->hdisplay; return mode->crtc_hsync_start - mode->crtc_hdisplay; } static unsigned int dpi_to_dsi_timing(unsigned int dpi_timing, unsigned int dpi_bpp, unsigned int dsi_pkt_overhead) { unsigned int dsi_timing = DIV_ROUND_UP(dpi_timing * dpi_bpp, 8); if (dsi_timing < dsi_pkt_overhead) dsi_timing = 0; else dsi_timing -= dsi_pkt_overhead; return dsi_timing; } static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi, const struct drm_display_mode *mode, struct cdns_dsi_cfg *dsi_cfg, bool mode_valid_check) { struct cdns_dsi_output *output = &dsi->output; unsigned int tmp; bool sync_pulse = false; int bpp; memset(dsi_cfg, 0, sizeof(*dsi_cfg)); if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) sync_pulse = true; bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format); if (mode_valid_check) tmp = mode->htotal - (sync_pulse ? mode->hsync_end : mode->hsync_start); else tmp = mode->crtc_htotal - (sync_pulse ? mode->crtc_hsync_end : mode->crtc_hsync_start); dsi_cfg->hbp = dpi_to_dsi_timing(tmp, bpp, DSI_HBP_FRAME_OVERHEAD); if (sync_pulse) { if (mode_valid_check) tmp = mode->hsync_end - mode->hsync_start; else tmp = mode->crtc_hsync_end - mode->crtc_hsync_start; dsi_cfg->hsa = dpi_to_dsi_timing(tmp, bpp, DSI_HSA_FRAME_OVERHEAD); } dsi_cfg->hact = dpi_to_dsi_timing(mode_valid_check ? mode->hdisplay : mode->crtc_hdisplay, bpp, 0); dsi_cfg->hfp = dpi_to_dsi_timing(mode_to_dpi_hfp(mode, mode_valid_check), bpp, DSI_HFP_FRAME_OVERHEAD); return 0; } static int cdns_dsi_adjust_phy_config(struct cdns_dsi *dsi, struct cdns_dsi_cfg *dsi_cfg, struct phy_configure_opts_mipi_dphy *phy_cfg, const struct drm_display_mode *mode, bool mode_valid_check) { struct cdns_dsi_output *output = &dsi->output; unsigned long long dlane_bps; unsigned long adj_dsi_htotal; unsigned long dsi_htotal; unsigned long dpi_htotal; unsigned long dpi_hz; unsigned int dsi_hfp_ext; unsigned int lanes = output->dev->lanes; dsi_htotal = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD; if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) dsi_htotal += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD; dsi_htotal += dsi_cfg->hact; dsi_htotal += dsi_cfg->hfp + DSI_HFP_FRAME_OVERHEAD; /* * Make sure DSI htotal is aligned on a lane boundary when calculating * the expected data rate. This is done by extending HFP in case of * misalignment. */ adj_dsi_htotal = dsi_htotal; if (dsi_htotal % lanes) adj_dsi_htotal += lanes - (dsi_htotal % lanes); dpi_hz = (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000; dlane_bps = (unsigned long long)dpi_hz * adj_dsi_htotal; /* data rate in bytes/sec is not an integer, refuse the mode. */ dpi_htotal = mode_valid_check ? mode->htotal : mode->crtc_htotal; if (do_div(dlane_bps, lanes * dpi_htotal)) return -EINVAL; /* data rate was in bytes/sec, convert to bits/sec. */ phy_cfg->hs_clk_rate = dlane_bps * 8; dsi_hfp_ext = adj_dsi_htotal - dsi_htotal; dsi_cfg->hfp += dsi_hfp_ext; dsi_cfg->htotal = dsi_htotal + dsi_hfp_ext; return 0; } static int cdns_dsi_check_conf(struct cdns_dsi *dsi, const struct drm_display_mode *mode, struct cdns_dsi_cfg *dsi_cfg, bool mode_valid_check) { struct cdns_dsi_output *output = &dsi->output; struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy; unsigned long dsi_hss_hsa_hse_hbp; unsigned int nlanes = output->dev->lanes; int ret; ret = cdns_dsi_mode2cfg(dsi, mode, dsi_cfg, mode_valid_check); if (ret) return ret; phy_mipi_dphy_get_default_config(mode->crtc_clock * 1000, mipi_dsi_pixel_format_to_bpp(output->dev->format), nlanes, phy_cfg); ret = cdns_dsi_adjust_phy_config(dsi, dsi_cfg, phy_cfg, mode, mode_valid_check); if (ret) return ret; ret = phy_validate(dsi->dphy, PHY_MODE_MIPI_DPHY, 0, &output->phy_opts); if (ret) return ret; dsi_hss_hsa_hse_hbp = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD; if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) dsi_hss_hsa_hse_hbp += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD; /* * Make sure DPI(HFP) > DSI(HSS+HSA+HSE+HBP) to guarantee that the FIFO * is empty before we start a receiving a new line on the DPI * interface. */ if ((u64)phy_cfg->hs_clk_rate * mode_to_dpi_hfp(mode, mode_valid_check) * nlanes < (u64)dsi_hss_hsa_hse_hbp * (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000) return -EINVAL; return 0; } static int cdns_dsi_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); struct cdns_dsi_output *output = &dsi->output; if (!drm_core_check_feature(bridge->dev, DRIVER_ATOMIC)) { dev_err(dsi->base.dev, "cdns-dsi driver is only compatible with DRM devices supporting atomic updates"); return -ENOTSUPP; } return drm_bridge_attach(bridge->encoder, output->bridge, bridge, flags); } static enum drm_mode_status cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info, const struct drm_display_mode *mode) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); struct cdns_dsi_output *output = &dsi->output; struct cdns_dsi_cfg dsi_cfg; int bpp, ret; /* * VFP_DSI should be less than VFP_DPI and VFP_DSI should be at * least 1. */ if (mode->vtotal - mode->vsync_end < 2) return MODE_V_ILLEGAL; /* VSA_DSI = VSA_DPI and must be at least 2. */ if (mode->vsync_end - mode->vsync_start < 2) return MODE_V_ILLEGAL; /* HACT must be 32-bits aligned. */ bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format); if ((mode->hdisplay * bpp) % 32) return MODE_H_ILLEGAL; ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, true); if (ret) return MODE_BAD; return MODE_OK; } static void cdns_dsi_bridge_disable(struct drm_bridge *bridge) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); u32 val; val = readl(dsi->regs + MCTL_MAIN_DATA_CTL); val &= ~(IF_VID_SELECT_MASK | IF_VID_MODE | VID_EN | HOST_EOT_GEN | DISP_EOT_GEN); writel(val, dsi->regs + MCTL_MAIN_DATA_CTL); val = readl(dsi->regs + MCTL_MAIN_EN) & ~IF_EN(input->id); writel(val, dsi->regs + MCTL_MAIN_EN); pm_runtime_put(dsi->base.dev); } static void cdns_dsi_bridge_post_disable(struct drm_bridge *bridge) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); pm_runtime_put(dsi->base.dev); } static void cdns_dsi_hs_init(struct cdns_dsi *dsi) { struct cdns_dsi_output *output = &dsi->output; u32 status; if (dsi->phy_initialized) return; /* * Power all internal DPHY blocks down and maintain their reset line * asserted before changing the DPHY config. */ writel(DPHY_CMN_PSO | DPHY_PLL_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN | DPHY_PLL_PDN, dsi->regs + MCTL_DPHY_CFG0); phy_init(dsi->dphy); phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY); phy_configure(dsi->dphy, &output->phy_opts); phy_power_on(dsi->dphy); /* Activate the PLL and wait until it's locked. */ writel(PLL_LOCKED, dsi->regs + MCTL_MAIN_STS_CLR); writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN, dsi->regs + MCTL_DPHY_CFG0); WARN_ON_ONCE(readl_poll_timeout(dsi->regs + MCTL_MAIN_STS, status, status & PLL_LOCKED, 100, 100)); /* De-assert data and clock reset lines. */ writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN | DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB, dsi->regs + MCTL_DPHY_CFG0); dsi->phy_initialized = true; } static void cdns_dsi_init_link(struct cdns_dsi *dsi) { struct cdns_dsi_output *output = &dsi->output; unsigned long sysclk_period, ulpout; u32 val; int i; if (dsi->link_initialized) return; val = 0; for (i = 1; i < output->dev->lanes; i++) val |= DATA_LANE_EN(i); if (!(output->dev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) val |= CLK_CONTINUOUS; writel(val, dsi->regs + MCTL_MAIN_PHY_CTL); /* ULPOUT should be set to 1ms and is expressed in sysclk cycles. */ sysclk_period = NSEC_PER_SEC / clk_get_rate(dsi->dsi_sys_clk); ulpout = DIV_ROUND_UP(NSEC_PER_MSEC, sysclk_period); writel(CLK_LANE_ULPOUT_TIME(ulpout) | DATA_LANE_ULPOUT_TIME(ulpout), dsi->regs + MCTL_ULPOUT_TIME); writel(LINK_EN, dsi->regs + MCTL_MAIN_DATA_CTL); val = CLK_LANE_EN | PLL_START; for (i = 0; i < output->dev->lanes; i++) val |= DATA_LANE_START(i); writel(val, dsi->regs + MCTL_MAIN_EN); dsi->link_initialized = true; } static void cdns_dsi_bridge_enable(struct drm_bridge *bridge) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); struct cdns_dsi_output *output = &dsi->output; struct drm_display_mode *mode; struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy; unsigned long tx_byte_period; struct cdns_dsi_cfg dsi_cfg; u32 tmp, reg_wakeup, div; int nlanes; if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0)) return; mode = &bridge->encoder->crtc->state->adjusted_mode; nlanes = output->dev->lanes; WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false)); cdns_dsi_hs_init(dsi); cdns_dsi_init_link(dsi); writel(HBP_LEN(dsi_cfg.hbp) | HSA_LEN(dsi_cfg.hsa), dsi->regs + VID_HSIZE1); writel(HFP_LEN(dsi_cfg.hfp) | HACT_LEN(dsi_cfg.hact), dsi->regs + VID_HSIZE2); writel(VBP_LEN(mode->crtc_vtotal - mode->crtc_vsync_end - 1) | VFP_LEN(mode->crtc_vsync_start - mode->crtc_vdisplay) | VSA_LEN(mode->crtc_vsync_end - mode->crtc_vsync_start + 1), dsi->regs + VID_VSIZE1); writel(mode->crtc_vdisplay, dsi->regs + VID_VSIZE2); tmp = dsi_cfg.htotal - (dsi_cfg.hsa + DSI_BLANKING_FRAME_OVERHEAD + DSI_HSA_FRAME_OVERHEAD); writel(BLK_LINE_PULSE_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE2); if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD), dsi->regs + VID_VCA_SETTING2); tmp = dsi_cfg.htotal - (DSI_HSS_VSS_VSE_FRAME_OVERHEAD + DSI_BLANKING_FRAME_OVERHEAD); writel(BLK_LINE_EVENT_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE1); if (!(output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)) writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD), dsi->regs + VID_VCA_SETTING2); tmp = DIV_ROUND_UP(dsi_cfg.htotal, nlanes) - DIV_ROUND_UP(dsi_cfg.hsa, nlanes); if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes); tx_byte_period = DIV_ROUND_DOWN_ULL((u64)NSEC_PER_SEC * 8, phy_cfg->hs_clk_rate); reg_wakeup = (phy_cfg->hs_prepare + phy_cfg->hs_zero) / tx_byte_period; writel(REG_WAKEUP_TIME(reg_wakeup) | REG_LINE_DURATION(tmp), dsi->regs + VID_DPHY_TIME); /* * HSTX and LPRX timeouts are both expressed in TX byte clk cycles and * both should be set to at least the time it takes to transmit a * frame. */ tmp = NSEC_PER_SEC / drm_mode_vrefresh(mode); tmp /= tx_byte_period; for (div = 0; div <= CLK_DIV_MAX; div++) { if (tmp <= HSTX_TIMEOUT_MAX) break; tmp >>= 1; } if (tmp > HSTX_TIMEOUT_MAX) tmp = HSTX_TIMEOUT_MAX; writel(CLK_DIV(div) | HSTX_TIMEOUT(tmp), dsi->regs + MCTL_DPHY_TIMEOUT1); writel(LPRX_TIMEOUT(tmp), dsi->regs + MCTL_DPHY_TIMEOUT2); if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO) { switch (output->dev->format) { case MIPI_DSI_FMT_RGB888: tmp = VID_PIXEL_MODE_RGB888 | VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_24); break; case MIPI_DSI_FMT_RGB666: tmp = VID_PIXEL_MODE_RGB666 | VID_DATATYPE(MIPI_DSI_PIXEL_STREAM_3BYTE_18); break; case MIPI_DSI_FMT_RGB666_PACKED: tmp = VID_PIXEL_MODE_RGB666_PACKED | VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_18); break; case MIPI_DSI_FMT_RGB565: tmp = VID_PIXEL_MODE_RGB565 | VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_16); break; default: dev_err(dsi->base.dev, "Unsupported DSI format\n"); return; } if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) tmp |= SYNC_PULSE_ACTIVE | SYNC_PULSE_HORIZONTAL; tmp |= REG_BLKLINE_MODE(REG_BLK_MODE_BLANKING_PKT) | REG_BLKEOL_MODE(REG_BLK_MODE_BLANKING_PKT) | RECOVERY_MODE(RECOVERY_MODE_NEXT_HSYNC) | VID_IGNORE_MISS_VSYNC; writel(tmp, dsi->regs + VID_MAIN_CTL); } tmp = readl(dsi->regs + MCTL_MAIN_DATA_CTL); tmp &= ~(IF_VID_SELECT_MASK | HOST_EOT_GEN | IF_VID_MODE); if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)) tmp |= HOST_EOT_GEN; if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO) tmp |= IF_VID_MODE | IF_VID_SELECT(input->id) | VID_EN; writel(tmp, dsi->regs + MCTL_MAIN_DATA_CTL); tmp = readl(dsi->regs + MCTL_MAIN_EN) | IF_EN(input->id); writel(tmp, dsi->regs + MCTL_MAIN_EN); } static void cdns_dsi_bridge_pre_enable(struct drm_bridge *bridge) { struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0)) return; cdns_dsi_init_link(dsi); cdns_dsi_hs_init(dsi); } static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = { .attach = cdns_dsi_bridge_attach, .mode_valid = cdns_dsi_bridge_mode_valid, .disable = cdns_dsi_bridge_disable, .pre_enable = cdns_dsi_bridge_pre_enable, .enable = cdns_dsi_bridge_enable, .post_disable = cdns_dsi_bridge_post_disable, }; static int cdns_dsi_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *dev) { struct cdns_dsi *dsi = to_cdns_dsi(host); struct cdns_dsi_output *output = &dsi->output; struct cdns_dsi_input *input = &dsi->input; struct drm_bridge *bridge; struct drm_panel *panel; struct device_node *np; int ret; /* * We currently do not support connecting several DSI devices to the * same host. In order to support that we'd need the DRM bridge * framework to allow dynamic reconfiguration of the bridge chain. */ if (output->dev) return -EBUSY; /* We do not support burst mode yet. */ if (dev->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) return -ENOTSUPP; /* * The host <-> device link might be described using an OF-graph * representation, in this case we extract the device of_node from * this representation, otherwise we use dsidev->dev.of_node which * should have been filled by the core. */ np = of_graph_get_remote_node(dsi->base.dev->of_node, DSI_OUTPUT_PORT, dev->channel); if (!np) np = of_node_get(dev->dev.of_node); panel = of_drm_find_panel(np); if (!IS_ERR(panel)) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_DSI); } else { bridge = of_drm_find_bridge(dev->dev.of_node); if (!bridge) bridge = ERR_PTR(-EINVAL); } of_node_put(np); if (IS_ERR(bridge)) { ret = PTR_ERR(bridge); dev_err(host->dev, "failed to add DSI device %s (err = %d)", dev->name, ret); return ret; } output->dev = dev; output->bridge = bridge; output->panel = panel; /* * The DSI output has been properly configured, we can now safely * register the input to the bridge framework so that it can take place * in a display pipeline. */ drm_bridge_add(&input->bridge); return 0; } static int cdns_dsi_detach(struct mipi_dsi_host *host, struct mipi_dsi_device *dev) { struct cdns_dsi *dsi = to_cdns_dsi(host); struct cdns_dsi_output *output = &dsi->output; struct cdns_dsi_input *input = &dsi->input; drm_bridge_remove(&input->bridge); if (output->panel) drm_panel_bridge_remove(output->bridge); return 0; } static irqreturn_t cdns_dsi_interrupt(int irq, void *data) { struct cdns_dsi *dsi = data; irqreturn_t ret = IRQ_NONE; u32 flag, ctl; flag = readl(dsi->regs + DIRECT_CMD_STS_FLAG); if (flag) { ctl = readl(dsi->regs + DIRECT_CMD_STS_CTL); ctl &= ~flag; writel(ctl, dsi->regs + DIRECT_CMD_STS_CTL); complete(&dsi->direct_cmd_comp); ret = IRQ_HANDLED; } return ret; } static ssize_t cdns_dsi_transfer(struct mipi_dsi_host *host, const struct mipi_dsi_msg *msg) { struct cdns_dsi *dsi = to_cdns_dsi(host); u32 cmd, sts, val, wait = WRITE_COMPLETED, ctl = 0; struct mipi_dsi_packet packet; int ret, i, tx_len, rx_len; ret = pm_runtime_resume_and_get(host->dev); if (ret < 0) return ret; cdns_dsi_init_link(dsi); ret = mipi_dsi_create_packet(&packet, msg); if (ret) goto out; tx_len = msg->tx_buf ? msg->tx_len : 0; rx_len = msg->rx_buf ? msg->rx_len : 0; /* For read operations, the maximum TX len is 2. */ if (rx_len && tx_len > 2) { ret = -ENOTSUPP; goto out; } /* TX len is limited by the CMD FIFO depth. */ if (tx_len > dsi->direct_cmd_fifo_depth) { ret = -ENOTSUPP; goto out; } /* RX len is limited by the RX FIFO depth. */ if (rx_len > dsi->rx_fifo_depth) { ret = -ENOTSUPP; goto out; } cmd = CMD_SIZE(tx_len) | CMD_VCHAN_ID(msg->channel) | CMD_DATATYPE(msg->type); if (msg->flags & MIPI_DSI_MSG_USE_LPM) cmd |= CMD_LP_EN; if (mipi_dsi_packet_format_is_long(msg->type)) cmd |= CMD_LONG; if (rx_len) { cmd |= READ_CMD; wait = READ_COMPLETED_WITH_ERR | READ_COMPLETED; ctl = READ_EN | BTA_EN; } else if (msg->flags & MIPI_DSI_MSG_REQ_ACK) { cmd |= BTA_REQ; wait = ACK_WITH_ERR_RCVD | ACK_RCVD; ctl = BTA_EN; } writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) | ctl, dsi->regs + MCTL_MAIN_DATA_CTL); writel(cmd, dsi->regs + DIRECT_CMD_MAIN_SETTINGS); for (i = 0; i < tx_len; i += 4) { const u8 *buf = msg->tx_buf; int j; val = 0; for (j = 0; j < 4 && j + i < tx_len; j++) val |= (u32)buf[i + j] << (8 * j); writel(val, dsi->regs + DIRECT_CMD_WRDATA); } /* Clear status flags before sending the command. */ writel(wait, dsi->regs + DIRECT_CMD_STS_CLR); writel(wait, dsi->regs + DIRECT_CMD_STS_CTL); reinit_completion(&dsi->direct_cmd_comp); writel(0, dsi->regs + DIRECT_CMD_SEND); wait_for_completion_timeout(&dsi->direct_cmd_comp, msecs_to_jiffies(1000)); sts = readl(dsi->regs + DIRECT_CMD_STS); writel(wait, dsi->regs + DIRECT_CMD_STS_CLR); writel(0, dsi->regs + DIRECT_CMD_STS_CTL); writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) & ~ctl, dsi->regs + MCTL_MAIN_DATA_CTL); /* We did not receive the events we were waiting for. */ if (!(sts & wait)) { ret = -ETIMEDOUT; goto out; } /* 'READ' or 'WRITE with ACK' failed. */ if (sts & (READ_COMPLETED_WITH_ERR | ACK_WITH_ERR_RCVD)) { ret = -EIO; goto out; } for (i = 0; i < rx_len; i += 4) { u8 *buf = msg->rx_buf; int j; val = readl(dsi->regs + DIRECT_CMD_RDDATA); for (j = 0; j < 4 && j + i < rx_len; j++) buf[i + j] = val >> (8 * j); } out: pm_runtime_put(host->dev); return ret; } static const struct mipi_dsi_host_ops cdns_dsi_ops = { .attach = cdns_dsi_attach, .detach = cdns_dsi_detach, .transfer = cdns_dsi_transfer, }; static int __maybe_unused cdns_dsi_resume(struct device *dev) { struct cdns_dsi *dsi = dev_get_drvdata(dev); reset_control_deassert(dsi->dsi_p_rst); clk_prepare_enable(dsi->dsi_p_clk); clk_prepare_enable(dsi->dsi_sys_clk); return 0; } static int __maybe_unused cdns_dsi_suspend(struct device *dev) { struct cdns_dsi *dsi = dev_get_drvdata(dev); clk_disable_unprepare(dsi->dsi_sys_clk); clk_disable_unprepare(dsi->dsi_p_clk); reset_control_assert(dsi->dsi_p_rst); dsi->link_initialized = false; return 0; } static UNIVERSAL_DEV_PM_OPS(cdns_dsi_pm_ops, cdns_dsi_suspend, cdns_dsi_resume, NULL); static int cdns_dsi_drm_probe(struct platform_device *pdev) { struct cdns_dsi *dsi; struct cdns_dsi_input *input; int ret, irq; u32 val; dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL); if (!dsi) return -ENOMEM; platform_set_drvdata(pdev, dsi); input = &dsi->input; dsi->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(dsi->regs)) return PTR_ERR(dsi->regs); dsi->dsi_p_clk = devm_clk_get(&pdev->dev, "dsi_p_clk"); if (IS_ERR(dsi->dsi_p_clk)) return PTR_ERR(dsi->dsi_p_clk); dsi->dsi_p_rst = devm_reset_control_get_optional_exclusive(&pdev->dev, "dsi_p_rst"); if (IS_ERR(dsi->dsi_p_rst)) return PTR_ERR(dsi->dsi_p_rst); dsi->dsi_sys_clk = devm_clk_get(&pdev->dev, "dsi_sys_clk"); if (IS_ERR(dsi->dsi_sys_clk)) return PTR_ERR(dsi->dsi_sys_clk); irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; dsi->dphy = devm_phy_get(&pdev->dev, "dphy"); if (IS_ERR(dsi->dphy)) return PTR_ERR(dsi->dphy); ret = clk_prepare_enable(dsi->dsi_p_clk); if (ret) return ret; val = readl(dsi->regs + ID_REG); if (REV_VENDOR_ID(val) != 0xcad) { dev_err(&pdev->dev, "invalid vendor id\n"); ret = -EINVAL; goto err_disable_pclk; } val = readl(dsi->regs + IP_CONF); dsi->direct_cmd_fifo_depth = 1 << (DIRCMD_FIFO_DEPTH(val) + 2); dsi->rx_fifo_depth = RX_FIFO_DEPTH(val); init_completion(&dsi->direct_cmd_comp); writel(0, dsi->regs + MCTL_MAIN_DATA_CTL); writel(0, dsi->regs + MCTL_MAIN_EN); writel(0, dsi->regs + MCTL_MAIN_PHY_CTL); /* * We only support the DPI input, so force input->id to * CDNS_DPI_INPUT. */ input->id = CDNS_DPI_INPUT; input->bridge.funcs = &cdns_dsi_bridge_funcs; input->bridge.of_node = pdev->dev.of_node; /* Mask all interrupts before registering the IRQ handler. */ writel(0, dsi->regs + MCTL_MAIN_STS_CTL); writel(0, dsi->regs + MCTL_DPHY_ERR_CTL1); writel(0, dsi->regs + CMD_MODE_STS_CTL); writel(0, dsi->regs + DIRECT_CMD_STS_CTL); writel(0, dsi->regs + DIRECT_CMD_RD_STS_CTL); writel(0, dsi->regs + VID_MODE_STS_CTL); writel(0, dsi->regs + TVG_STS_CTL); writel(0, dsi->regs + DPI_IRQ_EN); ret = devm_request_irq(&pdev->dev, irq, cdns_dsi_interrupt, 0, dev_name(&pdev->dev), dsi); if (ret) goto err_disable_pclk; pm_runtime_enable(&pdev->dev); dsi->base.dev = &pdev->dev; dsi->base.ops = &cdns_dsi_ops; ret = mipi_dsi_host_register(&dsi->base); if (ret) goto err_disable_runtime_pm; clk_disable_unprepare(dsi->dsi_p_clk); return 0; err_disable_runtime_pm: pm_runtime_disable(&pdev->dev); err_disable_pclk: clk_disable_unprepare(dsi->dsi_p_clk); return ret; } static int cdns_dsi_drm_remove(struct platform_device *pdev) { struct cdns_dsi *dsi = platform_get_drvdata(pdev); mipi_dsi_host_unregister(&dsi->base); pm_runtime_disable(&pdev->dev); return 0; } static const struct of_device_id cdns_dsi_of_match[] = { { .compatible = "cdns,dsi" }, { }, }; MODULE_DEVICE_TABLE(of, cdns_dsi_of_match); static struct platform_driver cdns_dsi_platform_driver = { .probe = cdns_dsi_drm_probe, .remove = cdns_dsi_drm_remove, .driver = { .name = "cdns-dsi", .of_match_table = cdns_dsi_of_match, .pm = &cdns_dsi_pm_ops, }, }; module_platform_driver(cdns_dsi_platform_driver); MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>"); MODULE_DESCRIPTION("Cadence DSI driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:cdns-dsi");
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