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drm/panel: Add panel driver for ChipWealth CH13726A based panels
This is used by the AYN Thor for the bottom panel. Signed-off-by: Teguh Sobirin <teguh@sobir.in> Co-developed-by: Aaron Kling <webgeek1234@gmail.com> Signed-off-by: Aaron Kling <webgeek1234@gmail.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patch.msgid.link/20260426-ch13726a-v7-2-554247c569e5@gmail.com
This commit is contained in:
Teguh Sobirin
Neil Armstrong
parent
889898e011
commit
3ee01b8647
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@ -105,6 +105,17 @@ config DRM_PANEL_BOE_TV101WUM_LL2
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Say Y here if you want to support for BOE TV101WUM-LL2
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WUXGA PANEL DSI Video Mode panel
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config DRM_PANEL_CHIPWEALTH_CH13726A
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tristate "CHIPWEALTH CH13726A-based DSI panel"
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depends on OF
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depends on DRM_MIPI_DSI
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depends on BACKLIGHT_CLASS_DEVICE
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select DRM_DISPLAY_DP_HELPER
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select DRM_DISPLAY_HELPER
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help
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Say Y here if you want to enable support for ChipWealth
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CH13726A-based display panels.
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config DRM_PANEL_EBBG_FT8719
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tristate "EBBG FT8719 panel driver"
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depends on OF
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@ -9,6 +9,7 @@ obj-$(CONFIG_DRM_PANEL_BOE_TD4320) += panel-boe-td4320.o
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obj-$(CONFIG_DRM_PANEL_BOE_TH101MB31UIG002_28A) += panel-boe-th101mb31ig002-28a.o
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obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_LL2) += panel-boe-tv101wum-ll2.o
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obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o
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obj-$(CONFIG_DRM_PANEL_CHIPWEALTH_CH13726A) += panel-chipwealth-ch13726a.o
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obj-$(CONFIG_DRM_PANEL_DSI_CM) += panel-dsi-cm.o
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obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
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obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
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333
drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c
Normal file
333
drivers/gpu/drm/panel/panel-chipwealth-ch13726a.c
Normal file
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@ -0,0 +1,333 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ChipWealth CH13726A MIPI-DSI panel driver
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* Copyright (c) 2024, Teguh Sobirin <teguh@sobir.in>.
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#include <video/mipi_display.h>
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static const struct regulator_bulk_data ch13726a_supplies[] = {
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{ .supply = "vdd1v2", },
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{ .supply = "vddio", },
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{ .supply = "vdd", },
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{ .supply = "avdd", },
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};
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struct ch13726a_panel {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi;
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struct regulator_bulk_data *supplies;
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struct gpio_desc *reset_gpio;
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struct ch13726a_desc *desc;
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enum drm_panel_orientation orientation;
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};
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struct ch13726a_desc {
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unsigned int width_mm;
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unsigned int height_mm;
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unsigned int bpc;
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const struct drm_display_mode *modes;
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unsigned int num_modes;
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};
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static inline struct ch13726a_panel *to_ch13726a_panel(struct drm_panel *panel)
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{
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return container_of(panel, struct ch13726a_panel, panel);
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}
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static void ch13726a_reset(struct ch13726a_panel *ctx)
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{
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(10000, 11000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(10000, 11000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(10000, 11000);
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}
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static int ch13726a_on(struct ch13726a_panel *ctx)
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{
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
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ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x50);
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mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00);
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mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
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mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
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return dsi_ctx.accum_err;
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}
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static int ch13726a_disable(struct drm_panel *panel)
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{
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struct ch13726a_panel *ctx = to_ch13726a_panel(panel);
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struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
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ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
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mipi_dsi_msleep(&dsi_ctx, 50);
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mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
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return dsi_ctx.accum_err;
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}
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static int ch13726a_prepare(struct drm_panel *panel)
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{
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struct ch13726a_panel *ctx = to_ch13726a_panel(panel);
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struct device *dev = &ctx->dsi->dev;
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(ch13726a_supplies), ctx->supplies);
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if (ret < 0) {
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dev_err(dev, "Failed to enable regulators: %d\n", ret);
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return ret;
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}
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ch13726a_reset(ctx);
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ret = ch13726a_on(ctx);
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if (ret < 0) {
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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regulator_bulk_disable(ARRAY_SIZE(ch13726a_supplies), ctx->supplies);
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return ret;
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}
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msleep(28);
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return 0;
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}
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static int ch13726a_unprepare(struct drm_panel *panel)
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{
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struct ch13726a_panel *ctx = to_ch13726a_panel(panel);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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regulator_bulk_disable(ARRAY_SIZE(ch13726a_supplies), ctx->supplies);
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return 0;
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}
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static const struct drm_display_mode thor_bottom_modes[] = {
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{
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/* 120Hz */
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.clock = (1080 + 28 + 4 + 36) * (1240 + 16 + 4 + 8) * 120 / 1000,
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.hdisplay = 1080,
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.hsync_start = 1080 + 28,
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.hsync_end = 1080 + 28 + 4,
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.htotal = 1080 + 28 + 4 + 36,
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.vdisplay = 1240,
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.vsync_start = 1240 + 16,
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.vsync_end = 1240 + 16 + 4,
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.vtotal = 1240 + 16 + 4 + 8,
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},
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{
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/* 60Hz */
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.clock = (1080 + 28 + 4 + 36) * (1240 + 16 + 4 + 8) * 60 / 1000,
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.hdisplay = 1080,
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.hsync_start = 1080 + 28,
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.hsync_end = 1080 + 28 + 4,
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.htotal = 1080 + 28 + 4 + 36,
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.vdisplay = 1240,
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.vsync_start = 1240 + 16,
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.vsync_end = 1240 + 16 + 4,
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.vtotal = 1240 + 16 + 4 + 8,
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}
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};
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static struct ch13726a_desc thor_bottom_desc = {
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.modes = thor_bottom_modes,
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.num_modes = ARRAY_SIZE(thor_bottom_modes),
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.width_mm = 65,
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.height_mm = 75,
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.bpc = 8,
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};
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static int ch13726a_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct ch13726a_panel *ctx = to_ch13726a_panel(panel);
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for (uint8_t i = 0; i < ctx->desc->num_modes; i++) {
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const struct drm_display_mode *m = &ctx->desc->modes[i];
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, m);
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if (!mode) {
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dev_err(&ctx->dsi->dev, "failed to add mode %ux%u@%u\n",
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m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
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return -ENOMEM;
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}
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mode->type = DRM_MODE_TYPE_DRIVER;
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if (i == 0)
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mode->type |= DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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}
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connector->display_info.width_mm = ctx->desc->width_mm;
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connector->display_info.height_mm = ctx->desc->height_mm;
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connector->display_info.bpc = ctx->desc->bpc;
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return ctx->desc->num_modes;
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}
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static enum drm_panel_orientation ch13726a_get_orientation(struct drm_panel *panel)
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{
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struct ch13726a_panel *ctx = to_ch13726a_panel(panel);
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return ctx->orientation;
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}
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static const struct drm_panel_funcs ch13726a_panel_funcs = {
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.prepare = ch13726a_prepare,
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.unprepare = ch13726a_unprepare,
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.disable = ch13726a_disable,
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.get_modes = ch13726a_get_modes,
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.get_orientation = ch13726a_get_orientation,
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};
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static int ch13726a_bl_update_status(struct backlight_device *bl)
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{
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struct mipi_dsi_device *dsi = bl_get_data(bl);
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u16 brightness = backlight_get_brightness(bl);
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int ret;
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
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if (ret < 0)
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return ret;
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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return 0;
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}
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static const struct backlight_ops ch13726a_bl_ops = {
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.update_status = ch13726a_bl_update_status,
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};
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static struct backlight_device *
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ch13726a_create_backlight(struct mipi_dsi_device *dsi)
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{
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struct device *dev = &dsi->dev;
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const struct backlight_properties props = {
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.type = BACKLIGHT_RAW,
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.brightness = 255,
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.max_brightness = 255,
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};
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return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
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&ch13726a_bl_ops, &props);
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}
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static int ch13726a_probe(struct mipi_dsi_device *dsi)
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{
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struct device *dev = &dsi->dev;
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struct ch13726a_panel *ctx;
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int ret;
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ctx = devm_drm_panel_alloc(dev, __typeof(*ctx), panel,
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&ch13726a_panel_funcs,
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DRM_MODE_CONNECTOR_DSI);
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if (IS_ERR(ctx))
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return PTR_ERR(ctx);
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ctx->desc = (struct ch13726a_desc *)of_device_get_match_data(dev);
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if (!ctx->desc)
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return -ENODEV;
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ret = devm_regulator_bulk_get_const(dev,
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ARRAY_SIZE(ch13726a_supplies),
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ch13726a_supplies,
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&ctx->supplies);
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if (ret < 0)
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return dev_err_probe(dev, ret, "Failed to get regulators\n");
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ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(ctx->reset_gpio))
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return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
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"Failed to get reset-gpios\n");
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ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);
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if (ret < 0) {
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dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
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return ret;
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}
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ctx->dsi = dsi;
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mipi_dsi_set_drvdata(dsi, ctx);
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dsi->lanes = 4;
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dsi->format = MIPI_DSI_FMT_RGB888;
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dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
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MIPI_DSI_CLOCK_NON_CONTINUOUS;
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ctx->panel.prepare_prev_first = true;
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ctx->panel.backlight = ch13726a_create_backlight(dsi);
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if (IS_ERR(ctx->panel.backlight))
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return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
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"Failed to create backlight\n");
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drm_panel_add(&ctx->panel);
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ret = mipi_dsi_attach(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
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drm_panel_remove(&ctx->panel);
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return ret;
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}
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return 0;
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}
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static void ch13726a_remove(struct mipi_dsi_device *dsi)
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{
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struct ch13726a_panel *ctx = mipi_dsi_get_drvdata(dsi);
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int ret;
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ret = mipi_dsi_detach(dsi);
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if (ret < 0)
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dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
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drm_panel_remove(&ctx->panel);
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}
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static const struct of_device_id ch13726a_of_match[] = {
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{ .compatible = "ayntec,thor-panel-bottom", .data = &thor_bottom_desc },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, ch13726a_of_match);
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static struct mipi_dsi_driver ch13726a_driver = {
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.probe = ch13726a_probe,
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.remove = ch13726a_remove,
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.driver = {
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.name = "panel-ch13726a-amoled",
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.of_match_table = ch13726a_of_match,
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},
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};
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module_mipi_dsi_driver(ch13726a_driver);
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MODULE_DESCRIPTION("DRM driver for CH13726A DSI panels");
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MODULE_LICENSE("GPL");
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