drm/panel: add BOE tv101wum-ll2 panel driver

Add support for the 1200x1920 BOE TV101WUM-LL2 DSI Display Panel found
in the Lenovo Smart Tab M10 tablet. The controller is unknown.

Reviewed-by: Douglas Anderson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/panel/Kconfig

···
 	  Say Y here if you want to support for BOE TV101WUM and AUO KD101N80
 	  45NA WUXGA PANEL DSI Video Mode panel
 
+config DRM_PANEL_BOE_TV101WUM_LL2
+	tristate "BOE TV101WUM LL2 1200x1920 panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to support for BOE TV101WUM-LL2
+	  WUXGA PANEL DSI Video Mode panel
+
 config DRM_PANEL_EBBG_FT8719
 	tristate "EBBG FT8719 panel driver"
 	depends on OF

drivers/gpu/drm/panel/Makefile

···
 obj-$(CONFIG_DRM_PANEL_BOE_BF060Y8M_AJ0) += panel-boe-bf060y8m-aj0.o
 obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.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_DSI_CM) += panel-dsi-cm.o
 obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o

drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+//   Copyright (c) 2013, The Linux Foundation. All rights reserved.
+//   Copyright (c) 2024, Neil Armstrong <[e-mail]>
+
+#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 <drm/drm_probe_helper.h>
+
+struct boe_tv101wum_ll2 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data *supplies;
+};
+
+static const struct regulator_bulk_data boe_tv101wum_ll2_supplies[] = {
+	{ .supply = "vsp" },
+	{ .supply = "vsn" },
+};
+
+static inline struct boe_tv101wum_ll2 *to_boe_tv101wum_ll2(struct drm_panel *panel)
+{
+	return container_of(panel, struct boe_tv101wum_ll2, panel);
+}
+
+static void boe_tv101wum_ll2_reset(struct boe_tv101wum_ll2 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(5000, 6000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(5000, 6000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+
+	msleep(120);
+}
+
+static int boe_tv101wum_ll2_on(struct boe_tv101wum_ll2 *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x50, 0x5a, 0x0e);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x80, 0xff, 0x81, 0x68, 0x6c, 0x22,
+				     0x6d, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x50, 0x5a, 0x23);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x90, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x94, 0x2c, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x50, 0x5a, 0x19);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xa2, 0x38);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x50, 0x5a, 0x0c);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x80, 0xfd);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x50, 0x00);
+
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	return dsi_ctx.accum_err;
+}
+
+static void boe_tv101wum_ll2_off(struct boe_tv101wum_ll2 *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 70);
+
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x04, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x05, 0x5a);
+
+	mipi_dsi_msleep(&dsi_ctx, 150);
+}
+
+static int boe_tv101wum_ll2_prepare(struct drm_panel *panel)
+{
+	struct boe_tv101wum_ll2 *ctx = to_boe_tv101wum_ll2(panel);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(boe_tv101wum_ll2_supplies),
+				    ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	boe_tv101wum_ll2_reset(ctx);
+
+	ret = boe_tv101wum_ll2_on(ctx);
+	if (ret < 0) {
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(boe_tv101wum_ll2_supplies),
+				       ctx->supplies);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int boe_tv101wum_ll2_unprepare(struct drm_panel *panel)
+{
+	struct boe_tv101wum_ll2 *ctx = to_boe_tv101wum_ll2(panel);
+
+	/* Ignore errors on failure, in any case set gpio and disable regulators */
+	boe_tv101wum_ll2_off(ctx);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+	regulator_bulk_disable(ARRAY_SIZE(boe_tv101wum_ll2_supplies),
+			       ctx->supplies);
+
+	return 0;
+}
+
+static const struct drm_display_mode boe_tv101wum_ll2_mode = {
+	.clock = (1200 + 27 + 8 + 12) * (1920 + 155 + 8 + 32) * 60 / 1000,
+	.hdisplay = 1200,
+	.hsync_start = 1200 + 27,
+	.hsync_end = 1200 + 27 + 8,
+	.htotal = 1200 + 27 + 8 + 12,
+	.vdisplay = 1920,
+	.vsync_start = 1920 + 155,
+	.vsync_end = 1920 + 155 + 8,
+	.vtotal = 1920 + 155 + 8 + 32,
+	.width_mm = 136,
+	.height_mm = 217,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int boe_tv101wum_ll2_get_modes(struct drm_panel *panel,
+				      struct drm_connector *connector)
+{
+	/* We do not set display_info.bpc since unset value is bpc=8 by default */
+	return drm_connector_helper_get_modes_fixed(connector, &boe_tv101wum_ll2_mode);
+}
+
+static const struct drm_panel_funcs boe_tv101wum_ll2_panel_funcs = {
+	.prepare = boe_tv101wum_ll2_prepare,
+	.unprepare = boe_tv101wum_ll2_unprepare,
+	.get_modes = boe_tv101wum_ll2_get_modes,
+};
+
+static int boe_tv101wum_ll2_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct boe_tv101wum_ll2 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ret = devm_regulator_bulk_get_const(&dsi->dev,
+					ARRAY_SIZE(boe_tv101wum_ll2_supplies),
+					boe_tv101wum_ll2_supplies,
+					&ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	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");
+
+	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_MODE_VIDEO_BURST |
+			  MIPI_DSI_MODE_VIDEO_HSE;
+
+	drm_panel_init(&ctx->panel, dev, &boe_tv101wum_ll2_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
+
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get backlight\n");
+
+	drm_panel_add(&ctx->panel);
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+	}
+
+	return 0;
+}
+
+static void boe_tv101wum_ll2_remove(struct mipi_dsi_device *dsi)
+{
+	struct boe_tv101wum_ll2 *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 boe_tv101wum_ll2_of_match[] = {
+	{ .compatible = "boe,tv101wum-ll2" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, boe_tv101wum_ll2_of_match);
+
+static struct mipi_dsi_driver boe_tv101wum_ll2_driver = {
+	.probe = boe_tv101wum_ll2_probe,
+	.remove = boe_tv101wum_ll2_remove,
+	.driver = {
+		.name = "panel-boe-tv101wum_ll2",
+		.of_match_table = boe_tv101wum_ll2_of_match,
+	},
+};
+module_mipi_dsi_driver(boe_tv101wum_ll2_driver);
+
+MODULE_DESCRIPTION("DRM driver for BOE TV101WUM-LL2 Panel");
+MODULE_LICENSE("GPL");