From: Teguh Sobirin <[email protected]> This is used by the AYN Thor for the bottom panel.
Signed-off-by: Teguh Sobirin <[email protected]> Co-authored-by: Aaron Kling <[email protected]> Signed-off-by: Aaron Kling <[email protected]> --- drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c | 296 ++++++++++++++++++++++ 3 files changed, 308 insertions(+) diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 307152ad77591af513086121813e6d52f9f5ed62..9791bf9850c3c29481afe46176aa474cf20ee0be 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -105,6 +105,17 @@ config DRM_PANEL_BOE_TV101WUM_LL2 Say Y here if you want to support for BOE TV101WUM-LL2 WUXGA PANEL DSI Video Mode panel +config DRM_PANEL_CHIPWEALTH_CH13726A + tristate "CHIPWEALTH CH13726A-based DSI panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + select DRM_DISPLAY_DP_HELPER + select DRM_DISPLAY_HELPER + help + Say Y here if you want to enable support for ChipWealth + CH13726A-based display panels. + config DRM_PANEL_EBBG_FT8719 tristate "EBBG FT8719 panel driver" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index aeffaa95666d6d447f675bf4e8e7d28ee7c1351a..8ec0a978221016d1e34bf05c64f58232d0a2dec3 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_DRM_PANEL_BOE_TD4320) += panel-boe-td4320.o obj-$(CONFIG_DRM_PANEL_BOE_TH101MB31UIG002_28A) += panel-boe-th101mb31ig002-28a.o obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_LL2) += panel-boe-tv101wum-ll2.o obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o +obj-$(CONFIG_DRM_PANEL_CHIPWEALTH_CH13726A) += panel-chipwealth-ch13726a.o obj-$(CONFIG_DRM_PANEL_DSI_CM) += panel-dsi-cm.o obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o diff --git a/drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c b/drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c new file mode 100644 index 0000000000000000000000000000000000000000..89961a5a697f0bbe3f6376ddf255a1f7e1461380 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c @@ -0,0 +1,296 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ChipWealth CH13726A MIPI-DSI panel driver + * Copyright (c) 2024, Teguh Sobirin <[email protected]>. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> + +struct ch13726a_panel { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + struct regulator_bulk_data supplies[4]; + struct gpio_desc *reset_gpio; + const struct drm_display_mode *display_mode; + enum drm_panel_orientation orientation; + bool prepared; +}; + +static inline struct ch13726a_panel *to_ch13726a_panel(struct drm_panel *panel) +{ + return container_of(panel, struct ch13726a_panel, panel); +} + +static void ch13726a_reset(struct ch13726a_panel *ctx) +{ + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + usleep_range(10000, 11000); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + usleep_range(10000, 11000); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + usleep_range(10000, 11000); +} + +static int ch13726a_on(struct ch13726a_panel *ctx) +{ + struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi }; + + ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x50); + mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00); + + mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); + + mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); + + return dsi_ctx.accum_err; +} + +static int ch13726a_disable(struct drm_panel *panel) +{ + struct ch13726a_panel *ctx = to_ch13726a_panel(panel); + struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi }; + + ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); + mipi_dsi_msleep(&dsi_ctx, 50); + mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); + + return dsi_ctx.accum_err; +} + +static int ch13726a_prepare(struct drm_panel *panel) +{ + struct ch13726a_panel *ctx = to_ch13726a_panel(panel); + struct device *dev = &ctx->dsi->dev; + int ret; + + if (ctx->prepared) + return 0; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators: %d\n", ret); + return ret; + } + + ch13726a_reset(ctx); + + ret = ch13726a_on(ctx); + if (ret < 0) { + dev_err(dev, "Failed to initialize panel: %d\n", ret); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + return ret; + } + + msleep(28); + + ctx->prepared = true; + + return 0; +} + +static int ch13726a_unprepare(struct drm_panel *panel) +{ + struct ch13726a_panel *ctx = to_ch13726a_panel(panel); + + if (!ctx->prepared) + return 0; + + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + + ctx->prepared = false; + return 0; +} + +static const struct drm_display_mode thor_bottom_display_mode = { + .clock = (1080 + 28 + 4 + 36) * (1240 + 16 + 4 + 8) * 60 / 1000, + .hdisplay = 1080, + .hsync_start = 1080 + 28, + .hsync_end = 1080 + 28 + 4, + .htotal = 1080 + 28 + 4 + 36, + .vdisplay = 1240, + .vsync_start = 1240 + 16, + .vsync_end = 1240 + 16 + 4, + .vtotal = 1240 + 16 + 4 + 8, + .width_mm = 65, + .height_mm = 75, +}; + +static int ch13726a_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct ch13726a_panel *ctx = to_ch13726a_panel(panel); + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(connector->dev, ctx->display_mode); + if (!mode) + return -ENOMEM; + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + connector->display_info.width_mm = mode->width_mm; + connector->display_info.height_mm = mode->height_mm; + drm_mode_probed_add(connector, mode); + + return 1; +} + +static enum drm_panel_orientation ch13726a_get_orientation(struct drm_panel *panel) +{ + struct ch13726a_panel *ctx = to_ch13726a_panel(panel); + + return ctx->orientation; +} + +static const struct drm_panel_funcs ch13726a_panel_funcs = { + .prepare = ch13726a_prepare, + .unprepare = ch13726a_unprepare, + .disable = ch13726a_disable, + .get_modes = ch13726a_get_modes, + .get_orientation = ch13726a_get_orientation, +}; + +static int ch13726a_bl_update_status(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness = backlight_get_brightness(bl); + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return 0; +} + +static const struct backlight_ops ch13726a_bl_ops = { + .update_status = ch13726a_bl_update_status, +}; + +static struct backlight_device * +ch13726a_create_backlight(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = 255, + .max_brightness = 255, + }; + + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, + &ch13726a_bl_ops, &props); +} + +static int ch13726a_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct ch13726a_panel *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->display_mode = of_device_get_match_data(dev); + + ctx->supplies[0].supply = "vdd1v2"; + ctx->supplies[1].supply = "vddio"; + ctx->supplies[2].supply = "vdd"; + ctx->supplies[3].supply = "avdd"; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), + ctx->supplies); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to get regulators\n"); + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), + "Failed to get reset-gpios\n"); + + ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation); + if (ret < 0) { + dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret); + return ret; + } + + ctx->dsi = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | + MIPI_DSI_CLOCK_NON_CONTINUOUS; + + drm_panel_init(&ctx->panel, dev, &ch13726a_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + ctx->panel.prepare_prev_first = true; + + ctx->panel.backlight = ch13726a_create_backlight(dsi); + if (IS_ERR(ctx->panel.backlight)) + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), + "Failed to create backlight\n"); + + drm_panel_add(&ctx->panel); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + dev_err(dev, "Failed to attach to DSI host: %d\n", ret); + drm_panel_remove(&ctx->panel); + return ret; + } + + return 0; +} + +static void ch13726a_remove(struct mipi_dsi_device *dsi) +{ + struct ch13726a_panel *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + ret = mipi_dsi_detach(dsi); + if (ret < 0) + dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); + + drm_panel_remove(&ctx->panel); +} + +static const struct of_device_id ch13726a_of_match[] = { + { .compatible = "ayntec,thor-panel-bottom", .data = &thor_bottom_display_mode }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ch13726a_of_match); + +static struct mipi_dsi_driver ch13726a_driver = { + .probe = ch13726a_probe, + .remove = ch13726a_remove, + .driver = { + .name = "panel-ch13726a-amoled", + .of_match_table = ch13726a_of_match, + }, +}; +module_mipi_dsi_driver(ch13726a_driver); + +MODULE_DESCRIPTION("DRM driver for CH13726A DSI panels"); +MODULE_LICENSE("GPL"); -- 2.52.0
