| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Rockteck jh057n00900 5.5" MIPI-DSI panel driver |
| * |
| * Copyright (C) Purism SPC 2019 |
| */ |
| |
| #include <drm/drm_mipi_dsi.h> |
| #include <drm/drm_modes.h> |
| #include <drm/drm_panel.h> |
| #include <drm/drm_print.h> |
| #include <linux/backlight.h> |
| #include <linux/debugfs.h> |
| #include <linux/delay.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/media-bus-format.h> |
| #include <linux/module.h> |
| #include <linux/regulator/consumer.h> |
| #include <video/display_timing.h> |
| #include <video/mipi_display.h> |
| |
| #define DRV_NAME "panel-rocktech-jh057n00900" |
| |
| /* Manufacturer specific Commands send via DSI */ |
| #define ST7703_CMD_ALL_PIXEL_OFF 0x22 |
| #define ST7703_CMD_ALL_PIXEL_ON 0x23 |
| #define ST7703_CMD_SETDISP 0xB2 |
| #define ST7703_CMD_SETRGBIF 0xB3 |
| #define ST7703_CMD_SETCYC 0xB4 |
| #define ST7703_CMD_SETBGP 0xB5 |
| #define ST7703_CMD_SETVCOM 0xB6 |
| #define ST7703_CMD_SETOTP 0xB7 |
| #define ST7703_CMD_SETPOWER_EXT 0xB8 |
| #define ST7703_CMD_SETEXTC 0xB9 |
| #define ST7703_CMD_SETMIPI 0xBA |
| #define ST7703_CMD_SETVDC 0xBC |
| #define ST7703_CMD_UNKNOWN0 0xBF |
| #define ST7703_CMD_SETSCR 0xC0 |
| #define ST7703_CMD_SETPOWER 0xC1 |
| #define ST7703_CMD_SETPANEL 0xCC |
| #define ST7703_CMD_SETGAMMA 0xE0 |
| #define ST7703_CMD_SETEQ 0xE3 |
| #define ST7703_CMD_SETGIP1 0xE9 |
| #define ST7703_CMD_SETGIP2 0xEA |
| |
| struct jh057n { |
| struct device *dev; |
| struct drm_panel panel; |
| struct gpio_desc *reset_gpio; |
| struct backlight_device *backlight; |
| struct regulator *vcc; |
| struct regulator *iovcc; |
| bool prepared; |
| |
| struct dentry *debugfs; |
| }; |
| |
| static inline struct jh057n *panel_to_jh057n(struct drm_panel *panel) |
| { |
| return container_of(panel, struct jh057n, panel); |
| } |
| |
| #define dsi_generic_write_seq(dsi, seq...) do { \ |
| static const u8 d[] = { seq }; \ |
| int ret; \ |
| ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \ |
| if (ret < 0) \ |
| return ret; \ |
| } while (0) |
| |
| static int jh057n_init_sequence(struct jh057n *ctx) |
| { |
| struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); |
| struct device *dev = ctx->dev; |
| int ret; |
| |
| /* |
| * Init sequence was supplied by the panel vendor. Most of the commands |
| * resemble the ST7703 but the number of parameters often don't match |
| * so it's likely a clone. |
| */ |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETEXTC, |
| 0xF1, 0x12, 0x83); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETRGBIF, |
| 0x10, 0x10, 0x05, 0x05, 0x03, 0xFF, 0x00, 0x00, |
| 0x00, 0x00); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETSCR, |
| 0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70, |
| 0x00); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETVDC, 0x4E); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0B); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETCYC, 0x80); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETDISP, 0xF0, 0x12, 0x30); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETEQ, |
| 0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00, |
| 0x00, 0x00, 0xFF, 0x00, 0xC0, 0x10); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETBGP, 0x08, 0x08); |
| msleep(20); |
| |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETVCOM, 0x3F, 0x3F); |
| dsi_generic_write_seq(dsi, ST7703_CMD_UNKNOWN0, 0x02, 0x11, 0x00); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP1, |
| 0x82, 0x10, 0x06, 0x05, 0x9E, 0x0A, 0xA5, 0x12, |
| 0x31, 0x23, 0x37, 0x83, 0x04, 0xBC, 0x27, 0x38, |
| 0x0C, 0x00, 0x03, 0x00, 0x00, 0x00, 0x0C, 0x00, |
| 0x03, 0x00, 0x00, 0x00, 0x75, 0x75, 0x31, 0x88, |
| 0x88, 0x88, 0x88, 0x88, 0x88, 0x13, 0x88, 0x64, |
| 0x64, 0x20, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, |
| 0x02, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP2, |
| 0x02, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x02, 0x46, 0x02, 0x88, |
| 0x88, 0x88, 0x88, 0x88, 0x88, 0x64, 0x88, 0x13, |
| 0x57, 0x13, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, |
| 0x75, 0x88, 0x23, 0x14, 0x00, 0x00, 0x02, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x0A, |
| 0xA5, 0x00, 0x00, 0x00, 0x00); |
| dsi_generic_write_seq(dsi, ST7703_CMD_SETGAMMA, |
| 0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41, 0x37, |
| 0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10, 0x11, |
| 0x18, 0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41, |
| 0x37, 0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10, |
| 0x11, 0x18); |
| msleep(20); |
| |
| ret = mipi_dsi_dcs_exit_sleep_mode(dsi); |
| if (ret < 0) { |
| DRM_DEV_ERROR(dev, "Failed to exit sleep mode: %d\n", ret); |
| return ret; |
| } |
| /* Panel is operational 120 msec after reset */ |
| msleep(60); |
| ret = mipi_dsi_dcs_set_display_on(dsi); |
| if (ret) |
| return ret; |
| |
| DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n"); |
| return 0; |
| } |
| |
| static int jh057n_enable(struct drm_panel *panel) |
| { |
| struct jh057n *ctx = panel_to_jh057n(panel); |
| int ret; |
| |
| ret = jh057n_init_sequence(ctx); |
| if (ret < 0) { |
| DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n", |
| ret); |
| return ret; |
| } |
| |
| return backlight_enable(ctx->backlight); |
| } |
| |
| static int jh057n_disable(struct drm_panel *panel) |
| { |
| struct jh057n *ctx = panel_to_jh057n(panel); |
| struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); |
| |
| backlight_disable(ctx->backlight); |
| return mipi_dsi_dcs_set_display_off(dsi); |
| } |
| |
| static int jh057n_unprepare(struct drm_panel *panel) |
| { |
| struct jh057n *ctx = panel_to_jh057n(panel); |
| |
| if (!ctx->prepared) |
| return 0; |
| |
| regulator_disable(ctx->iovcc); |
| regulator_disable(ctx->vcc); |
| ctx->prepared = false; |
| |
| return 0; |
| } |
| |
| static int jh057n_prepare(struct drm_panel *panel) |
| { |
| struct jh057n *ctx = panel_to_jh057n(panel); |
| int ret; |
| |
| if (ctx->prepared) |
| return 0; |
| |
| DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n"); |
| ret = regulator_enable(ctx->vcc); |
| if (ret < 0) { |
| DRM_DEV_ERROR(ctx->dev, |
| "Failed to enable vcc supply: %d\n", ret); |
| return ret; |
| } |
| ret = regulator_enable(ctx->iovcc); |
| if (ret < 0) { |
| DRM_DEV_ERROR(ctx->dev, |
| "Failed to enable iovcc supply: %d\n", ret); |
| goto disable_vcc; |
| } |
| |
| gpiod_set_value_cansleep(ctx->reset_gpio, 1); |
| usleep_range(20, 40); |
| gpiod_set_value_cansleep(ctx->reset_gpio, 0); |
| msleep(20); |
| |
| ctx->prepared = true; |
| |
| return 0; |
| |
| disable_vcc: |
| regulator_disable(ctx->vcc); |
| return ret; |
| } |
| |
| static const struct drm_display_mode default_mode = { |
| .hdisplay = 720, |
| .hsync_start = 720 + 90, |
| .hsync_end = 720 + 90 + 20, |
| .htotal = 720 + 90 + 20 + 20, |
| .vdisplay = 1440, |
| .vsync_start = 1440 + 20, |
| .vsync_end = 1440 + 20 + 4, |
| .vtotal = 1440 + 20 + 4 + 12, |
| .vrefresh = 60, |
| .clock = 75276, |
| .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, |
| .width_mm = 65, |
| .height_mm = 130, |
| }; |
| |
| static int jh057n_get_modes(struct drm_panel *panel) |
| { |
| struct jh057n *ctx = panel_to_jh057n(panel); |
| struct drm_display_mode *mode; |
| |
| mode = drm_mode_duplicate(panel->drm, &default_mode); |
| if (!mode) { |
| DRM_DEV_ERROR(ctx->dev, "Failed to add mode %ux%u@%u\n", |
| default_mode.hdisplay, default_mode.vdisplay, |
| default_mode.vrefresh); |
| return -ENOMEM; |
| } |
| |
| drm_mode_set_name(mode); |
| |
| mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
| panel->connector->display_info.width_mm = mode->width_mm; |
| panel->connector->display_info.height_mm = mode->height_mm; |
| drm_mode_probed_add(panel->connector, mode); |
| |
| return 1; |
| } |
| |
| static const struct drm_panel_funcs jh057n_drm_funcs = { |
| .disable = jh057n_disable, |
| .unprepare = jh057n_unprepare, |
| .prepare = jh057n_prepare, |
| .enable = jh057n_enable, |
| .get_modes = jh057n_get_modes, |
| }; |
| |
| static int allpixelson_set(void *data, u64 val) |
| { |
| struct jh057n *ctx = data; |
| struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); |
| |
| DRM_DEV_DEBUG_DRIVER(ctx->dev, "Setting all pixels on\n"); |
| dsi_generic_write_seq(dsi, ST7703_CMD_ALL_PIXEL_ON); |
| msleep(val * 1000); |
| /* Reset the panel to get video back */ |
| drm_panel_disable(&ctx->panel); |
| drm_panel_unprepare(&ctx->panel); |
| drm_panel_prepare(&ctx->panel); |
| drm_panel_enable(&ctx->panel); |
| |
| return 0; |
| } |
| |
| DEFINE_SIMPLE_ATTRIBUTE(allpixelson_fops, NULL, |
| allpixelson_set, "%llu\n"); |
| |
| static void jh057n_debugfs_init(struct jh057n *ctx) |
| { |
| ctx->debugfs = debugfs_create_dir(DRV_NAME, NULL); |
| |
| debugfs_create_file("allpixelson", 0600, ctx->debugfs, ctx, |
| &allpixelson_fops); |
| } |
| |
| static void jh057n_debugfs_remove(struct jh057n *ctx) |
| { |
| debugfs_remove_recursive(ctx->debugfs); |
| ctx->debugfs = NULL; |
| } |
| |
| static int jh057n_probe(struct mipi_dsi_device *dsi) |
| { |
| struct device *dev = &dsi->dev; |
| struct jh057n *ctx; |
| int ret; |
| |
| ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->reset_gpio)) { |
| DRM_DEV_ERROR(dev, "cannot get reset gpio\n"); |
| return PTR_ERR(ctx->reset_gpio); |
| } |
| |
| mipi_dsi_set_drvdata(dsi, ctx); |
| |
| ctx->dev = dev; |
| |
| dsi->lanes = 4; |
| dsi->format = MIPI_DSI_FMT_RGB888; |
| dsi->mode_flags = MIPI_DSI_MODE_VIDEO | |
| MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE; |
| |
| ctx->backlight = devm_of_find_backlight(dev); |
| if (IS_ERR(ctx->backlight)) |
| return PTR_ERR(ctx->backlight); |
| |
| ctx->vcc = devm_regulator_get(dev, "vcc"); |
| if (IS_ERR(ctx->vcc)) { |
| ret = PTR_ERR(ctx->vcc); |
| if (ret != -EPROBE_DEFER) |
| DRM_DEV_ERROR(dev, |
| "Failed to request vcc regulator: %d\n", |
| ret); |
| return ret; |
| } |
| ctx->iovcc = devm_regulator_get(dev, "iovcc"); |
| if (IS_ERR(ctx->iovcc)) { |
| ret = PTR_ERR(ctx->iovcc); |
| if (ret != -EPROBE_DEFER) |
| DRM_DEV_ERROR(dev, |
| "Failed to request iovcc regulator: %d\n", |
| ret); |
| return ret; |
| } |
| |
| drm_panel_init(&ctx->panel, dev, &jh057n_drm_funcs, |
| DRM_MODE_CONNECTOR_DSI); |
| |
| drm_panel_add(&ctx->panel); |
| |
| ret = mipi_dsi_attach(dsi); |
| if (ret < 0) { |
| DRM_DEV_ERROR(dev, |
| "mipi_dsi_attach failed (%d). Is host ready?\n", |
| ret); |
| drm_panel_remove(&ctx->panel); |
| return ret; |
| } |
| |
| DRM_DEV_INFO(dev, "%ux%u@%u %ubpp dsi %udl - ready\n", |
| default_mode.hdisplay, default_mode.vdisplay, |
| default_mode.vrefresh, |
| mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes); |
| |
| jh057n_debugfs_init(ctx); |
| return 0; |
| } |
| |
| static void jh057n_shutdown(struct mipi_dsi_device *dsi) |
| { |
| struct jh057n *ctx = mipi_dsi_get_drvdata(dsi); |
| int ret; |
| |
| ret = drm_panel_unprepare(&ctx->panel); |
| if (ret < 0) |
| DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n", |
| ret); |
| |
| ret = drm_panel_disable(&ctx->panel); |
| if (ret < 0) |
| DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n", |
| ret); |
| } |
| |
| static int jh057n_remove(struct mipi_dsi_device *dsi) |
| { |
| struct jh057n *ctx = mipi_dsi_get_drvdata(dsi); |
| int ret; |
| |
| jh057n_shutdown(dsi); |
| |
| ret = mipi_dsi_detach(dsi); |
| if (ret < 0) |
| DRM_DEV_ERROR(&dsi->dev, "Failed to detach from DSI host: %d\n", |
| ret); |
| |
| drm_panel_remove(&ctx->panel); |
| |
| jh057n_debugfs_remove(ctx); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id jh057n_of_match[] = { |
| { .compatible = "rocktech,jh057n00900" }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, jh057n_of_match); |
| |
| static struct mipi_dsi_driver jh057n_driver = { |
| .probe = jh057n_probe, |
| .remove = jh057n_remove, |
| .shutdown = jh057n_shutdown, |
| .driver = { |
| .name = DRV_NAME, |
| .of_match_table = jh057n_of_match, |
| }, |
| }; |
| module_mipi_dsi_driver(jh057n_driver); |
| |
| MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>"); |
| MODULE_DESCRIPTION("DRM driver for Rocktech JH057N00900 MIPI DSI panel"); |
| MODULE_LICENSE("GPL v2"); |