| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2018-2019, Bridge Systems BV |
| * Copyright (C) 2018-2019, Bootlin |
| * Copyright (C) 2017, Free Electrons |
| * |
| * This file based on panel-ilitek-ili9881c.c |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/errno.h> |
| #include <linux/fb.h> |
| #include <linux/kernel.h> |
| #include <linux/media-bus-format.h> |
| #include <linux/module.h> |
| |
| #include <linux/gpio/consumer.h> |
| #include <linux/regulator/consumer.h> |
| |
| #include <drm/drm_connector.h> |
| #include <drm/drm_mipi_dsi.h> |
| #include <drm/drm_modes.h> |
| #include <drm/drm_panel.h> |
| #include <drm/drm_print.h> |
| |
| struct rb070d30_panel { |
| struct drm_panel panel; |
| struct mipi_dsi_device *dsi; |
| struct regulator *supply; |
| |
| struct { |
| struct gpio_desc *power; |
| struct gpio_desc *reset; |
| struct gpio_desc *updn; |
| struct gpio_desc *shlr; |
| } gpios; |
| }; |
| |
| static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel) |
| { |
| return container_of(panel, struct rb070d30_panel, panel); |
| } |
| |
| static int rb070d30_panel_prepare(struct drm_panel *panel) |
| { |
| struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
| int ret; |
| |
| ret = regulator_enable(ctx->supply); |
| if (ret < 0) { |
| DRM_DEV_ERROR(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret); |
| return ret; |
| } |
| |
| msleep(20); |
| gpiod_set_value(ctx->gpios.power, 1); |
| msleep(20); |
| gpiod_set_value(ctx->gpios.reset, 1); |
| msleep(20); |
| return 0; |
| } |
| |
| static int rb070d30_panel_unprepare(struct drm_panel *panel) |
| { |
| struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
| |
| gpiod_set_value(ctx->gpios.reset, 0); |
| gpiod_set_value(ctx->gpios.power, 0); |
| regulator_disable(ctx->supply); |
| |
| return 0; |
| } |
| |
| static int rb070d30_panel_enable(struct drm_panel *panel) |
| { |
| struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
| int ret; |
| |
| ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int rb070d30_panel_disable(struct drm_panel *panel) |
| { |
| struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
| |
| return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); |
| } |
| |
| /* Default timings */ |
| static const struct drm_display_mode default_mode = { |
| .clock = 51206, |
| .hdisplay = 1024, |
| .hsync_start = 1024 + 160, |
| .hsync_end = 1024 + 160 + 80, |
| .htotal = 1024 + 160 + 80 + 80, |
| .vdisplay = 600, |
| .vsync_start = 600 + 12, |
| .vsync_end = 600 + 12 + 10, |
| .vtotal = 600 + 12 + 10 + 13, |
| .vrefresh = 60, |
| |
| .width_mm = 154, |
| .height_mm = 85, |
| }; |
| |
| static int rb070d30_panel_get_modes(struct drm_panel *panel, |
| struct drm_connector *connector) |
| { |
| struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
| struct drm_display_mode *mode; |
| static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
| |
| mode = drm_mode_duplicate(connector->dev, &default_mode); |
| if (!mode) { |
| DRM_DEV_ERROR(&ctx->dsi->dev, |
| "Failed to add mode " DRM_MODE_FMT "\n", |
| DRM_MODE_ARG(&default_mode)); |
| return -EINVAL; |
| } |
| |
| drm_mode_set_name(mode); |
| |
| mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
| drm_mode_probed_add(connector, mode); |
| |
| connector->display_info.bpc = 8; |
| connector->display_info.width_mm = mode->width_mm; |
| connector->display_info.height_mm = mode->height_mm; |
| drm_display_info_set_bus_formats(&connector->display_info, |
| &bus_format, 1); |
| |
| return 1; |
| } |
| |
| static const struct drm_panel_funcs rb070d30_panel_funcs = { |
| .get_modes = rb070d30_panel_get_modes, |
| .prepare = rb070d30_panel_prepare, |
| .enable = rb070d30_panel_enable, |
| .disable = rb070d30_panel_disable, |
| .unprepare = rb070d30_panel_unprepare, |
| }; |
| |
| static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) |
| { |
| struct rb070d30_panel *ctx; |
| int ret; |
| |
| ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd"); |
| if (IS_ERR(ctx->supply)) |
| return PTR_ERR(ctx->supply); |
| |
| mipi_dsi_set_drvdata(dsi, ctx); |
| ctx->dsi = dsi; |
| |
| drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs, |
| DRM_MODE_CONNECTOR_DSI); |
| |
| ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->gpios.reset)) { |
| DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n"); |
| return PTR_ERR(ctx->gpios.reset); |
| } |
| |
| ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->gpios.power)) { |
| DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n"); |
| return PTR_ERR(ctx->gpios.power); |
| } |
| |
| /* |
| * We don't change the state of that GPIO later on but we need |
| * to force it into a low state. |
| */ |
| ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->gpios.updn)) { |
| DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n"); |
| return PTR_ERR(ctx->gpios.updn); |
| } |
| |
| /* |
| * We don't change the state of that GPIO later on but we need |
| * to force it into a low state. |
| */ |
| ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW); |
| if (IS_ERR(ctx->gpios.shlr)) { |
| DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n"); |
| return PTR_ERR(ctx->gpios.shlr); |
| } |
| |
| ret = drm_panel_of_backlight(&ctx->panel); |
| if (ret) |
| return ret; |
| |
| ret = drm_panel_add(&ctx->panel); |
| if (ret < 0) |
| return ret; |
| |
| dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; |
| dsi->format = MIPI_DSI_FMT_RGB888; |
| dsi->lanes = 4; |
| |
| return mipi_dsi_attach(dsi); |
| } |
| |
| static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi) |
| { |
| struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi); |
| |
| mipi_dsi_detach(dsi); |
| drm_panel_remove(&ctx->panel); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id rb070d30_panel_of_match[] = { |
| { .compatible = "ronbo,rb070d30" }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match); |
| |
| static struct mipi_dsi_driver rb070d30_panel_driver = { |
| .probe = rb070d30_panel_dsi_probe, |
| .remove = rb070d30_panel_dsi_remove, |
| .driver = { |
| .name = "panel-ronbo-rb070d30", |
| .of_match_table = rb070d30_panel_of_match, |
| }, |
| }; |
| module_mipi_dsi_driver(rb070d30_panel_driver); |
| |
| MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>"); |
| MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>"); |
| MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver"); |
| MODULE_LICENSE("GPL"); |