diff options
Diffstat (limited to 'drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c | 816 |
1 files changed, 0 insertions, 816 deletions
diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c deleted file mode 100644 index aa95b85a2964..000000000000 --- a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c +++ /dev/null @@ -1,816 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * RZ/G2L MIPI DSI Encoder Driver - * - * Copyright (C) 2022 Renesas Electronics Corporation - */ -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/iopoll.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_graph.h> -#include <linux/platform_device.h> -#include <linux/pm_runtime.h> -#include <linux/reset.h> -#include <linux/slab.h> - -#include <drm/drm_atomic.h> -#include <drm/drm_atomic_helper.h> -#include <drm/drm_bridge.h> -#include <drm/drm_mipi_dsi.h> -#include <drm/drm_of.h> -#include <drm/drm_panel.h> -#include <drm/drm_probe_helper.h> - -#include "rzg2l_mipi_dsi_regs.h" - -struct rzg2l_mipi_dsi { - struct device *dev; - void __iomem *mmio; - - struct reset_control *rstc; - struct reset_control *arstc; - struct reset_control *prstc; - - struct mipi_dsi_host host; - struct drm_bridge bridge; - struct drm_bridge *next_bridge; - - struct clk *vclk; - - enum mipi_dsi_pixel_format format; - unsigned int num_data_lanes; - unsigned int lanes; - unsigned long mode_flags; -}; - -static inline struct rzg2l_mipi_dsi * -bridge_to_rzg2l_mipi_dsi(struct drm_bridge *bridge) -{ - return container_of(bridge, struct rzg2l_mipi_dsi, bridge); -} - -static inline struct rzg2l_mipi_dsi * -host_to_rzg2l_mipi_dsi(struct mipi_dsi_host *host) -{ - return container_of(host, struct rzg2l_mipi_dsi, host); -} - -struct rzg2l_mipi_dsi_timings { - unsigned long hsfreq_max; - u32 t_init; - u32 tclk_prepare; - u32 ths_prepare; - u32 tclk_zero; - u32 tclk_pre; - u32 tclk_post; - u32 tclk_trail; - u32 ths_zero; - u32 ths_trail; - u32 ths_exit; - u32 tlpx; -}; - -static const struct rzg2l_mipi_dsi_timings rzg2l_mipi_dsi_global_timings[] = { - { - .hsfreq_max = 80000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 13, - .tclk_zero = 33, - .tclk_pre = 24, - .tclk_post = 94, - .tclk_trail = 10, - .ths_zero = 23, - .ths_trail = 17, - .ths_exit = 13, - .tlpx = 6, - }, - { - .hsfreq_max = 125000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 12, - .tclk_zero = 33, - .tclk_pre = 15, - .tclk_post = 94, - .tclk_trail = 10, - .ths_zero = 23, - .ths_trail = 17, - .ths_exit = 13, - .tlpx = 6, - }, - { - .hsfreq_max = 250000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 12, - .tclk_zero = 33, - .tclk_pre = 13, - .tclk_post = 94, - .tclk_trail = 10, - .ths_zero = 23, - .ths_trail = 16, - .ths_exit = 13, - .tlpx = 6, - }, - { - .hsfreq_max = 360000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 10, - .tclk_zero = 33, - .tclk_pre = 4, - .tclk_post = 35, - .tclk_trail = 7, - .ths_zero = 16, - .ths_trail = 9, - .ths_exit = 13, - .tlpx = 6, - }, - { - .hsfreq_max = 720000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 9, - .tclk_zero = 33, - .tclk_pre = 4, - .tclk_post = 35, - .tclk_trail = 7, - .ths_zero = 16, - .ths_trail = 9, - .ths_exit = 13, - .tlpx = 6, - }, - { - .hsfreq_max = 1500000, - .t_init = 79801, - .tclk_prepare = 8, - .ths_prepare = 9, - .tclk_zero = 33, - .tclk_pre = 4, - .tclk_post = 35, - .tclk_trail = 7, - .ths_zero = 16, - .ths_trail = 9, - .ths_exit = 13, - .tlpx = 6, - }, -}; - -static void rzg2l_mipi_dsi_phy_write(struct rzg2l_mipi_dsi *dsi, u32 reg, u32 data) -{ - iowrite32(data, dsi->mmio + reg); -} - -static void rzg2l_mipi_dsi_link_write(struct rzg2l_mipi_dsi *dsi, u32 reg, u32 data) -{ - iowrite32(data, dsi->mmio + LINK_REG_OFFSET + reg); -} - -static u32 rzg2l_mipi_dsi_phy_read(struct rzg2l_mipi_dsi *dsi, u32 reg) -{ - return ioread32(dsi->mmio + reg); -} - -static u32 rzg2l_mipi_dsi_link_read(struct rzg2l_mipi_dsi *dsi, u32 reg) -{ - return ioread32(dsi->mmio + LINK_REG_OFFSET + reg); -} - -/* ----------------------------------------------------------------------------- - * Hardware Setup - */ - -static int rzg2l_mipi_dsi_dphy_init(struct rzg2l_mipi_dsi *dsi, - unsigned long hsfreq) -{ - const struct rzg2l_mipi_dsi_timings *dphy_timings; - unsigned int i; - u32 dphyctrl0; - u32 dphytim0; - u32 dphytim1; - u32 dphytim2; - u32 dphytim3; - int ret; - - /* All DSI global operation timings are set with recommended setting */ - for (i = 0; i < ARRAY_SIZE(rzg2l_mipi_dsi_global_timings); ++i) { - dphy_timings = &rzg2l_mipi_dsi_global_timings[i]; - if (hsfreq <= dphy_timings->hsfreq_max) - break; - } - - /* Initializing DPHY before accessing LINK */ - dphyctrl0 = DSIDPHYCTRL0_CAL_EN_HSRX_OFS | DSIDPHYCTRL0_CMN_MASTER_EN | - DSIDPHYCTRL0_RE_VDD_DETVCCQLV18 | DSIDPHYCTRL0_EN_BGR; - - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYCTRL0, dphyctrl0); - usleep_range(20, 30); - - dphyctrl0 |= DSIDPHYCTRL0_EN_LDO1200; - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYCTRL0, dphyctrl0); - usleep_range(10, 20); - - dphytim0 = DSIDPHYTIM0_TCLK_MISS(0) | - DSIDPHYTIM0_T_INIT(dphy_timings->t_init); - dphytim1 = DSIDPHYTIM1_THS_PREPARE(dphy_timings->ths_prepare) | - DSIDPHYTIM1_TCLK_PREPARE(dphy_timings->tclk_prepare) | - DSIDPHYTIM1_THS_SETTLE(0) | - DSIDPHYTIM1_TCLK_SETTLE(0); - dphytim2 = DSIDPHYTIM2_TCLK_TRAIL(dphy_timings->tclk_trail) | - DSIDPHYTIM2_TCLK_POST(dphy_timings->tclk_post) | - DSIDPHYTIM2_TCLK_PRE(dphy_timings->tclk_pre) | - DSIDPHYTIM2_TCLK_ZERO(dphy_timings->tclk_zero); - dphytim3 = DSIDPHYTIM3_TLPX(dphy_timings->tlpx) | - DSIDPHYTIM3_THS_EXIT(dphy_timings->ths_exit) | - DSIDPHYTIM3_THS_TRAIL(dphy_timings->ths_trail) | - DSIDPHYTIM3_THS_ZERO(dphy_timings->ths_zero); - - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYTIM0, dphytim0); - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYTIM1, dphytim1); - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYTIM2, dphytim2); - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYTIM3, dphytim3); - - ret = reset_control_deassert(dsi->rstc); - if (ret < 0) - return ret; - - udelay(1); - - return 0; -} - -static void rzg2l_mipi_dsi_dphy_exit(struct rzg2l_mipi_dsi *dsi) -{ - u32 dphyctrl0; - - dphyctrl0 = rzg2l_mipi_dsi_phy_read(dsi, DSIDPHYCTRL0); - - dphyctrl0 &= ~(DSIDPHYCTRL0_EN_LDO1200 | DSIDPHYCTRL0_EN_BGR); - rzg2l_mipi_dsi_phy_write(dsi, DSIDPHYCTRL0, dphyctrl0); - - reset_control_assert(dsi->rstc); -} - -static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi, - const struct drm_display_mode *mode) -{ - unsigned long hsfreq; - unsigned int bpp; - u32 txsetr; - u32 clstptsetr; - u32 lptrnstsetr; - u32 clkkpt; - u32 clkbfht; - u32 clkstpt; - u32 golpbkt; - int ret; - - /* - * Relationship between hsclk and vclk must follow - * vclk * bpp = hsclk * 8 * lanes - * where vclk: video clock (Hz) - * bpp: video pixel bit depth - * hsclk: DSI HS Byte clock frequency (Hz) - * lanes: number of data lanes - * - * hsclk(bit) = hsclk(byte) * 8 - */ - bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); - hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes); - - ret = pm_runtime_resume_and_get(dsi->dev); - if (ret < 0) - return ret; - - clk_set_rate(dsi->vclk, mode->clock * 1000); - - ret = rzg2l_mipi_dsi_dphy_init(dsi, hsfreq); - if (ret < 0) - goto err_phy; - - /* Enable Data lanes and Clock lanes */ - txsetr = TXSETR_DLEN | TXSETR_NUMLANEUSE(dsi->lanes - 1) | TXSETR_CLEN; - rzg2l_mipi_dsi_link_write(dsi, TXSETR, txsetr); - - /* - * Global timings characteristic depends on high speed Clock Frequency - * Currently MIPI DSI-IF just supports maximum FHD@60 with: - * - videoclock = 148.5 (MHz) - * - bpp: maximum 24bpp - * - data lanes: maximum 4 lanes - * Therefore maximum hsclk will be 891 Mbps. - */ - if (hsfreq > 445500) { - clkkpt = 12; - clkbfht = 15; - clkstpt = 48; - golpbkt = 75; - } else if (hsfreq > 250000) { - clkkpt = 7; - clkbfht = 8; - clkstpt = 27; - golpbkt = 40; - } else { - clkkpt = 8; - clkbfht = 6; - clkstpt = 24; - golpbkt = 29; - } - - clstptsetr = CLSTPTSETR_CLKKPT(clkkpt) | CLSTPTSETR_CLKBFHT(clkbfht) | - CLSTPTSETR_CLKSTPT(clkstpt); - rzg2l_mipi_dsi_link_write(dsi, CLSTPTSETR, clstptsetr); - - lptrnstsetr = LPTRNSTSETR_GOLPBKT(golpbkt); - rzg2l_mipi_dsi_link_write(dsi, LPTRNSTSETR, lptrnstsetr); - - return 0; - -err_phy: - rzg2l_mipi_dsi_dphy_exit(dsi); - pm_runtime_put(dsi->dev); - - return ret; -} - -static void rzg2l_mipi_dsi_stop(struct rzg2l_mipi_dsi *dsi) -{ - rzg2l_mipi_dsi_dphy_exit(dsi); - pm_runtime_put(dsi->dev); -} - -static void rzg2l_mipi_dsi_set_display_timing(struct rzg2l_mipi_dsi *dsi, - const struct drm_display_mode *mode) -{ - u32 vich1ppsetr; - u32 vich1vssetr; - u32 vich1vpsetr; - u32 vich1hssetr; - u32 vich1hpsetr; - int dsi_format; - u32 delay[2]; - u8 index; - - /* Configuration for Pixel Packet */ - dsi_format = mipi_dsi_pixel_format_to_bpp(dsi->format); - switch (dsi_format) { - case 24: - vich1ppsetr = VICH1PPSETR_DT_RGB24; - break; - case 18: - vich1ppsetr = VICH1PPSETR_DT_RGB18; - break; - } - - if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) && - !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)) - vich1ppsetr |= VICH1PPSETR_TXESYNC_PULSE; - - rzg2l_mipi_dsi_link_write(dsi, VICH1PPSETR, vich1ppsetr); - - /* Configuration for Video Parameters */ - vich1vssetr = VICH1VSSETR_VACTIVE(mode->vdisplay) | - VICH1VSSETR_VSA(mode->vsync_end - mode->vsync_start); - vich1vssetr |= (mode->flags & DRM_MODE_FLAG_PVSYNC) ? - VICH1VSSETR_VSPOL_HIGH : VICH1VSSETR_VSPOL_LOW; - - vich1vpsetr = VICH1VPSETR_VFP(mode->vsync_start - mode->vdisplay) | - VICH1VPSETR_VBP(mode->vtotal - mode->vsync_end); - - vich1hssetr = VICH1HSSETR_HACTIVE(mode->hdisplay) | - VICH1HSSETR_HSA(mode->hsync_end - mode->hsync_start); - vich1hssetr |= (mode->flags & DRM_MODE_FLAG_PHSYNC) ? - VICH1HSSETR_HSPOL_HIGH : VICH1HSSETR_HSPOL_LOW; - - vich1hpsetr = VICH1HPSETR_HFP(mode->hsync_start - mode->hdisplay) | - VICH1HPSETR_HBP(mode->htotal - mode->hsync_end); - - rzg2l_mipi_dsi_link_write(dsi, VICH1VSSETR, vich1vssetr); - rzg2l_mipi_dsi_link_write(dsi, VICH1VPSETR, vich1vpsetr); - rzg2l_mipi_dsi_link_write(dsi, VICH1HSSETR, vich1hssetr); - rzg2l_mipi_dsi_link_write(dsi, VICH1HPSETR, vich1hpsetr); - - /* - * Configuration for Delay Value - * Delay value based on 2 ranges of video clock. - * 74.25MHz is videoclock of HD@60p or FHD@30p - */ - if (mode->clock > 74250) { - delay[0] = 231; - delay[1] = 216; - } else { - delay[0] = 220; - delay[1] = 212; - } - - if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) - index = 0; - else - index = 1; - - rzg2l_mipi_dsi_link_write(dsi, VICH1SET1R, - VICH1SET1R_DLY(delay[index])); -} - -static int rzg2l_mipi_dsi_start_hs_clock(struct rzg2l_mipi_dsi *dsi) -{ - bool is_clk_cont; - u32 hsclksetr; - u32 status; - int ret; - - is_clk_cont = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS); - - /* Start HS clock */ - hsclksetr = HSCLKSETR_HSCLKRUN_HS | (is_clk_cont ? - HSCLKSETR_HSCLKMODE_CONT : - HSCLKSETR_HSCLKMODE_NON_CONT); - rzg2l_mipi_dsi_link_write(dsi, HSCLKSETR, hsclksetr); - - if (is_clk_cont) { - ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status, - status & PLSR_CLLP2HS, - 2000, 20000, false, dsi, PLSR); - if (ret < 0) { - dev_err(dsi->dev, "failed to start HS clock\n"); - return ret; - } - } - - dev_dbg(dsi->dev, "Start High Speed Clock with %s clock mode", - is_clk_cont ? "continuous" : "non-continuous"); - - return 0; -} - -static int rzg2l_mipi_dsi_stop_hs_clock(struct rzg2l_mipi_dsi *dsi) -{ - bool is_clk_cont; - u32 status; - int ret; - - is_clk_cont = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS); - - /* Stop HS clock */ - rzg2l_mipi_dsi_link_write(dsi, HSCLKSETR, - is_clk_cont ? HSCLKSETR_HSCLKMODE_CONT : - HSCLKSETR_HSCLKMODE_NON_CONT); - - if (is_clk_cont) { - ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status, - status & PLSR_CLHS2LP, - 2000, 20000, false, dsi, PLSR); - if (ret < 0) { - dev_err(dsi->dev, "failed to stop HS clock\n"); - return ret; - } - } - - return 0; -} - -static int rzg2l_mipi_dsi_start_video(struct rzg2l_mipi_dsi *dsi) -{ - u32 vich1set0r; - u32 status; - int ret; - - /* Configuration for Blanking sequence and start video input*/ - vich1set0r = VICH1SET0R_HFPNOLP | VICH1SET0R_HBPNOLP | - VICH1SET0R_HSANOLP | VICH1SET0R_VSTART; - rzg2l_mipi_dsi_link_write(dsi, VICH1SET0R, vich1set0r); - - ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status, - status & VICH1SR_VIRDY, - 2000, 20000, false, dsi, VICH1SR); - if (ret < 0) - dev_err(dsi->dev, "Failed to start video signal input\n"); - - return ret; -} - -static int rzg2l_mipi_dsi_stop_video(struct rzg2l_mipi_dsi *dsi) -{ - u32 status; - int ret; - - rzg2l_mipi_dsi_link_write(dsi, VICH1SET0R, VICH1SET0R_VSTPAFT); - ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status, - (status & VICH1SR_STOP) && (!(status & VICH1SR_RUNNING)), - 2000, 20000, false, dsi, VICH1SR); - if (ret < 0) - goto err; - - ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status, - !(status & LINKSR_HSBUSY), - 2000, 20000, false, dsi, LINKSR); - if (ret < 0) - goto err; - - return 0; - -err: - dev_err(dsi->dev, "Failed to stop video signal input\n"); - return ret; -} - -/* ----------------------------------------------------------------------------- - * Bridge - */ - -static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge, - enum drm_bridge_attach_flags flags) -{ - struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge); - - return drm_bridge_attach(bridge->encoder, dsi->next_bridge, bridge, - flags); -} - -static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge, - struct drm_bridge_state *old_bridge_state) -{ - struct drm_atomic_state *state = old_bridge_state->base.state; - struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge); - const struct drm_display_mode *mode; - struct drm_connector *connector; - struct drm_crtc *crtc; - int ret; - - connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); - crtc = drm_atomic_get_new_connector_state(state, connector)->crtc; - mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode; - - ret = rzg2l_mipi_dsi_startup(dsi, mode); - if (ret < 0) - return; - - rzg2l_mipi_dsi_set_display_timing(dsi, mode); - - ret = rzg2l_mipi_dsi_start_hs_clock(dsi); - if (ret < 0) - goto err_stop; - - ret = rzg2l_mipi_dsi_start_video(dsi); - if (ret < 0) - goto err_stop_clock; - - return; - -err_stop_clock: - rzg2l_mipi_dsi_stop_hs_clock(dsi); -err_stop: - rzg2l_mipi_dsi_stop(dsi); -} - -static void rzg2l_mipi_dsi_atomic_disable(struct drm_bridge *bridge, - struct drm_bridge_state *old_bridge_state) -{ - struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge); - - rzg2l_mipi_dsi_stop_video(dsi); - rzg2l_mipi_dsi_stop_hs_clock(dsi); - rzg2l_mipi_dsi_stop(dsi); -} - -static enum drm_mode_status -rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge, - const struct drm_display_info *info, - const struct drm_display_mode *mode) -{ - if (mode->clock > 148500) - return MODE_CLOCK_HIGH; - - return MODE_OK; -} - -static const struct drm_bridge_funcs rzg2l_mipi_dsi_bridge_ops = { - .attach = rzg2l_mipi_dsi_attach, - .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, - .atomic_reset = drm_atomic_helper_bridge_reset, - .atomic_enable = rzg2l_mipi_dsi_atomic_enable, - .atomic_disable = rzg2l_mipi_dsi_atomic_disable, - .mode_valid = rzg2l_mipi_dsi_bridge_mode_valid, -}; - -/* ----------------------------------------------------------------------------- - * Host setting - */ - -static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host, - struct mipi_dsi_device *device) -{ - struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host); - int ret; - - if (device->lanes > dsi->num_data_lanes) { - dev_err(dsi->dev, - "Number of lines of device (%u) exceeds host (%u)\n", - device->lanes, dsi->num_data_lanes); - return -EINVAL; - } - - switch (mipi_dsi_pixel_format_to_bpp(device->format)) { - case 24: - case 18: - break; - default: - dev_err(dsi->dev, "Unsupported format 0x%04x\n", device->format); - return -EINVAL; - } - - dsi->lanes = device->lanes; - dsi->format = device->format; - dsi->mode_flags = device->mode_flags; - - dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, - 1, 0); - if (IS_ERR(dsi->next_bridge)) { - ret = PTR_ERR(dsi->next_bridge); - dev_err(dsi->dev, "failed to get next bridge: %d\n", ret); - return ret; - } - - drm_bridge_add(&dsi->bridge); - - return 0; -} - -static int rzg2l_mipi_dsi_host_detach(struct mipi_dsi_host *host, - struct mipi_dsi_device *device) -{ - struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host); - - drm_bridge_remove(&dsi->bridge); - - return 0; -} - -static const struct mipi_dsi_host_ops rzg2l_mipi_dsi_host_ops = { - .attach = rzg2l_mipi_dsi_host_attach, - .detach = rzg2l_mipi_dsi_host_detach, -}; - -/* ----------------------------------------------------------------------------- - * Power Management - */ - -static int __maybe_unused rzg2l_mipi_pm_runtime_suspend(struct device *dev) -{ - struct rzg2l_mipi_dsi *dsi = dev_get_drvdata(dev); - - reset_control_assert(dsi->prstc); - reset_control_assert(dsi->arstc); - - return 0; -} - -static int __maybe_unused rzg2l_mipi_pm_runtime_resume(struct device *dev) -{ - struct rzg2l_mipi_dsi *dsi = dev_get_drvdata(dev); - int ret; - - ret = reset_control_deassert(dsi->arstc); - if (ret < 0) - return ret; - - ret = reset_control_deassert(dsi->prstc); - if (ret < 0) - reset_control_assert(dsi->arstc); - - return ret; -} - -static const struct dev_pm_ops rzg2l_mipi_pm_ops = { - SET_RUNTIME_PM_OPS(rzg2l_mipi_pm_runtime_suspend, rzg2l_mipi_pm_runtime_resume, NULL) -}; - -/* ----------------------------------------------------------------------------- - * Probe & Remove - */ - -static int rzg2l_mipi_dsi_probe(struct platform_device *pdev) -{ - unsigned int num_data_lanes; - struct rzg2l_mipi_dsi *dsi; - u32 txsetr; - int ret; - - dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL); - if (!dsi) - return -ENOMEM; - - platform_set_drvdata(pdev, dsi); - dsi->dev = &pdev->dev; - - ret = drm_of_get_data_lanes_count_ep(dsi->dev->of_node, 1, 0, 1, 4); - if (ret < 0) - return dev_err_probe(dsi->dev, ret, - "missing or invalid data-lanes property\n"); - - num_data_lanes = ret; - - dsi->mmio = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(dsi->mmio)) - return PTR_ERR(dsi->mmio); - - dsi->vclk = devm_clk_get(dsi->dev, "vclk"); - if (IS_ERR(dsi->vclk)) - return PTR_ERR(dsi->vclk); - - dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst"); - if (IS_ERR(dsi->rstc)) - return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc), - "failed to get rst\n"); - - dsi->arstc = devm_reset_control_get_exclusive(dsi->dev, "arst"); - if (IS_ERR(dsi->arstc)) - return dev_err_probe(&pdev->dev, PTR_ERR(dsi->arstc), - "failed to get arst\n"); - - dsi->prstc = devm_reset_control_get_exclusive(dsi->dev, "prst"); - if (IS_ERR(dsi->prstc)) - return dev_err_probe(dsi->dev, PTR_ERR(dsi->prstc), - "failed to get prst\n"); - - platform_set_drvdata(pdev, dsi); - - pm_runtime_enable(dsi->dev); - - ret = pm_runtime_resume_and_get(dsi->dev); - if (ret < 0) - goto err_pm_disable; - - /* - * TXSETR register can be read only after DPHY init. But during probe - * mode->clock and format are not available. So initialize DPHY with - * timing parameters for 80Mbps. - */ - ret = rzg2l_mipi_dsi_dphy_init(dsi, 80000); - if (ret < 0) - goto err_phy; - - txsetr = rzg2l_mipi_dsi_link_read(dsi, TXSETR); - dsi->num_data_lanes = min(((txsetr >> 16) & 3) + 1, num_data_lanes); - rzg2l_mipi_dsi_dphy_exit(dsi); - pm_runtime_put(dsi->dev); - - /* Initialize the DRM bridge. */ - dsi->bridge.funcs = &rzg2l_mipi_dsi_bridge_ops; - dsi->bridge.of_node = dsi->dev->of_node; - - /* Init host device */ - dsi->host.dev = dsi->dev; - dsi->host.ops = &rzg2l_mipi_dsi_host_ops; - ret = mipi_dsi_host_register(&dsi->host); - if (ret < 0) - goto err_pm_disable; - - return 0; - -err_phy: - rzg2l_mipi_dsi_dphy_exit(dsi); - pm_runtime_put(dsi->dev); -err_pm_disable: - pm_runtime_disable(dsi->dev); - return ret; -} - -static int rzg2l_mipi_dsi_remove(struct platform_device *pdev) -{ - struct rzg2l_mipi_dsi *dsi = platform_get_drvdata(pdev); - - mipi_dsi_host_unregister(&dsi->host); - pm_runtime_disable(&pdev->dev); - - return 0; -} - -static const struct of_device_id rzg2l_mipi_dsi_of_table[] = { - { .compatible = "renesas,rzg2l-mipi-dsi" }, - { /* sentinel */ } -}; - -MODULE_DEVICE_TABLE(of, rzg2l_mipi_dsi_of_table); - -static struct platform_driver rzg2l_mipi_dsi_platform_driver = { - .probe = rzg2l_mipi_dsi_probe, - .remove = rzg2l_mipi_dsi_remove, - .driver = { - .name = "rzg2l-mipi-dsi", - .pm = &rzg2l_mipi_pm_ops, - .of_match_table = rzg2l_mipi_dsi_of_table, - }, -}; - -module_platform_driver(rzg2l_mipi_dsi_platform_driver); - -MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>"); -MODULE_DESCRIPTION("Renesas RZ/G2L MIPI DSI Encoder Driver"); -MODULE_LICENSE("GPL"); |