From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Mark Brown <broonie@kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: dri-devel@lists.freedesktop.org,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>, Mark Rutland <mark.rutland@arm.com>,
        Rob Herring <robh+dt@kernel.org>, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        Boris Brezillon <boris.brezillon@free-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Subject: [PATCH 15/18] drm/panel: Add Huarui LHR050H41 panel driver
Date: Thu, 13 Jul 2017 16:13:10 +0200
Message-Id: <78212e5adad59f09db9ff87b4430b97494f4d874.1499955058.git-series.maxime.ripard@free-electrons.com>
In-Reply-To: <cover.a5e7407c191c66e264164d017f64582039c56acb.1499955058.git-series.maxime.ripard@free-electrons.com>
References: <cover.a5e7407c191c66e264164d017f64582039c56acb.1499955058.git-series.maxime.ripard@free-electrons.com>
In-Reply-To: <cover.a5e7407c191c66e264164d017f64582039c56acb.1499955058.git-series.maxime.ripard@free-electrons.com>
References: <cover.a5e7407c191c66e264164d017f64582039c56acb.1499955058.git-series.maxime.ripard@free-electrons.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 16037
Lines: 494

The LHR050H41 panel is the panel shipped with the BananaPi M2-Magic. Add a
driver for it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 drivers/gpu/drm/panel/Kconfig                  |   9 +-
 drivers/gpu/drm/panel/Makefile                 |   1 +-
 drivers/gpu/drm/panel/panel-huarui-lhr050h41.c | 444 ++++++++++++++++++-
 3 files changed, 454 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-huarui-lhr050h41.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index d84a031fae24..eaa6e102775a 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -28,6 +28,15 @@ config DRM_PANEL_SIMPLE
 	  that it can be automatically turned off when the panel goes into a
 	  low power state.
 
+config DRM_PANEL_HUARUI_LHR050H41
+	tristate "Huarui LHR050H41 panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y if you want to enable support for the Huarui Lighting
+	  LHR05041 DSI panel. The panel has a 1280x720 resolution.
+
 config DRM_PANEL_INNOLUX_P079ZCA
 	tristate "Innolux P079ZCA panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 9f6610d08b00..58de7a853898 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -1,5 +1,6 @@
 obj-$(CONFIG_DRM_PANEL_LVDS) += panel-lvds.o
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_HUARUI_LHR050H41) += panel-huarui-lhr050h41.o
 obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
 obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
diff --git a/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c b/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c
new file mode 100644
index 000000000000..eb675eb9ee7d
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-huarui-lhr050h41.c
@@ -0,0 +1,444 @@
+#include <linux/backlight.h>
+#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/module.h>
+
+#include <linux/gpio/consumer.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#include <video/mipi_display.h>
+
+struct lhr050h41 {
+	struct drm_panel	panel;
+	struct mipi_dsi_device	*dsi;
+
+	struct backlight_device *backlight;
+	struct gpio_desc	*power;
+	struct gpio_desc	*reset;
+};
+
+static inline struct lhr050h41 *panel_to_lhr050h41(struct drm_panel *panel)
+{
+	return container_of(panel, struct lhr050h41, panel);
+}
+
+static int lhr050h41_switch_page(struct lhr050h41 *ctx, u8 page)
+{
+	u8 buf[4] = { 0xff, 0x98, 0x81, page };
+
+	return mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+}
+
+static int lhr050h41_send_cmd_data(struct lhr050h41 *ctx, u8 cmd, u8 data)
+{
+	u8 buf[2] = { cmd, data };
+
+	return mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
+}
+
+static int lhr050h41_send_init_sequence(struct lhr050h41 *ctx)
+{
+	lhr050h41_switch_page(ctx, 3);
+
+	lhr050h41_send_cmd_data(ctx, 0x01, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x02, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x03, 0x73);
+	lhr050h41_send_cmd_data(ctx, 0x04, 0x03);
+	lhr050h41_send_cmd_data(ctx, 0x05, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x06, 0x06);
+	lhr050h41_send_cmd_data(ctx, 0x07, 0x06);
+	lhr050h41_send_cmd_data(ctx, 0x08, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x09, 0x18);
+	lhr050h41_send_cmd_data(ctx, 0x0a, 0x04);
+	lhr050h41_send_cmd_data(ctx, 0x0b, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x0c, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x0d, 0x03);
+	lhr050h41_send_cmd_data(ctx, 0x0e, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x0f, 0x25);
+	lhr050h41_send_cmd_data(ctx, 0x10, 0x25);
+	lhr050h41_send_cmd_data(ctx, 0x11, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x12, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x13, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x14, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x15, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x16, 0x0C);
+	lhr050h41_send_cmd_data(ctx, 0x17, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x18, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x19, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x1a, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x1b, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x1c, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x1d, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x1e, 0xC0);
+	lhr050h41_send_cmd_data(ctx, 0x1f, 0x80);
+	lhr050h41_send_cmd_data(ctx, 0x20, 0x04);
+	lhr050h41_send_cmd_data(ctx, 0x21, 0x01);
+	lhr050h41_send_cmd_data(ctx, 0x22, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x23, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x24, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x25, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x26, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x27, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x28, 0x33);
+	lhr050h41_send_cmd_data(ctx, 0x29, 0x03);
+	lhr050h41_send_cmd_data(ctx, 0x2a, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x2b, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x2c, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x2d, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x2e, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x2f, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x30, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x31, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x32, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x33, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x34, 0x04);
+	lhr050h41_send_cmd_data(ctx, 0x35, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x36, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x37, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x38, 0x3C);
+	lhr050h41_send_cmd_data(ctx, 0x39, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3a, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3b, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3c, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3d, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3e, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x3f, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x40, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x41, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x42, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x43, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x44, 0x00);
+
+	lhr050h41_send_cmd_data(ctx, 0x50, 0x01);
+	lhr050h41_send_cmd_data(ctx, 0x51, 0x23);
+	lhr050h41_send_cmd_data(ctx, 0x52, 0x45);
+	lhr050h41_send_cmd_data(ctx, 0x53, 0x67);
+	lhr050h41_send_cmd_data(ctx, 0x54, 0x89);
+	lhr050h41_send_cmd_data(ctx, 0x55, 0xab);
+	lhr050h41_send_cmd_data(ctx, 0x56, 0x01);
+	lhr050h41_send_cmd_data(ctx, 0x57, 0x23);
+	lhr050h41_send_cmd_data(ctx, 0x58, 0x45);
+	lhr050h41_send_cmd_data(ctx, 0x59, 0x67);
+	lhr050h41_send_cmd_data(ctx, 0x5a, 0x89);
+	lhr050h41_send_cmd_data(ctx, 0x5b, 0xab);
+	lhr050h41_send_cmd_data(ctx, 0x5c, 0xcd);
+	lhr050h41_send_cmd_data(ctx, 0x5d, 0xef);
+
+	lhr050h41_send_cmd_data(ctx, 0x5e, 0x11);
+	lhr050h41_send_cmd_data(ctx, 0x5f, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x60, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x61, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x62, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x63, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x64, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x65, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x66, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x67, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x68, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x69, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x6a, 0x0C);
+	lhr050h41_send_cmd_data(ctx, 0x6b, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x6c, 0x0F);
+	lhr050h41_send_cmd_data(ctx, 0x6d, 0x0E);
+	lhr050h41_send_cmd_data(ctx, 0x6e, 0x0D);
+	lhr050h41_send_cmd_data(ctx, 0x6f, 0x06);
+	lhr050h41_send_cmd_data(ctx, 0x70, 0x07);
+	lhr050h41_send_cmd_data(ctx, 0x71, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x72, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x73, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x74, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x75, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x76, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x77, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x78, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x79, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7a, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7b, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7c, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7d, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7e, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x7f, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x80, 0x0C);
+	lhr050h41_send_cmd_data(ctx, 0x81, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x82, 0x0F);
+	lhr050h41_send_cmd_data(ctx, 0x83, 0x0E);
+	lhr050h41_send_cmd_data(ctx, 0x84, 0x0D);
+	lhr050h41_send_cmd_data(ctx, 0x85, 0x06);
+	lhr050h41_send_cmd_data(ctx, 0x86, 0x07);
+	lhr050h41_send_cmd_data(ctx, 0x87, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x88, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x89, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x8A, 0x02);
+
+	lhr050h41_switch_page(ctx, 4);
+	lhr050h41_send_cmd_data(ctx, 0x6C, 0x15);
+	lhr050h41_send_cmd_data(ctx, 0x6E, 0x22);
+	lhr050h41_send_cmd_data(ctx, 0x6F, 0x33);
+	lhr050h41_send_cmd_data(ctx, 0x3A, 0xA4);
+	lhr050h41_send_cmd_data(ctx, 0x8D, 0x0D);
+	lhr050h41_send_cmd_data(ctx, 0x87, 0xBA);
+	lhr050h41_send_cmd_data(ctx, 0x26, 0x76);
+	lhr050h41_send_cmd_data(ctx, 0xB2, 0xD1);
+
+	lhr050h41_switch_page(ctx, 1);
+	lhr050h41_send_cmd_data(ctx, 0x22, 0x0A);
+	lhr050h41_send_cmd_data(ctx, 0x53, 0xDC);
+	lhr050h41_send_cmd_data(ctx, 0x55, 0xA7);
+	lhr050h41_send_cmd_data(ctx, 0x50, 0x78);
+	lhr050h41_send_cmd_data(ctx, 0x51, 0x78);
+	lhr050h41_send_cmd_data(ctx, 0x31, 0x02);
+	lhr050h41_send_cmd_data(ctx, 0x60, 0x14);
+	lhr050h41_send_cmd_data(ctx, 0xA0, 0x2A);
+	lhr050h41_send_cmd_data(ctx, 0xA1, 0x39);
+	lhr050h41_send_cmd_data(ctx, 0xA2, 0x46);
+	lhr050h41_send_cmd_data(ctx, 0xA3, 0x0e);
+	lhr050h41_send_cmd_data(ctx, 0xA4, 0x12);
+	lhr050h41_send_cmd_data(ctx, 0xA5, 0x25);
+	lhr050h41_send_cmd_data(ctx, 0xA6, 0x19);
+	lhr050h41_send_cmd_data(ctx, 0xA7, 0x1d);
+	lhr050h41_send_cmd_data(ctx, 0xA8, 0xa6);
+	lhr050h41_send_cmd_data(ctx, 0xA9, 0x1C);
+	lhr050h41_send_cmd_data(ctx, 0xAA, 0x29);
+	lhr050h41_send_cmd_data(ctx, 0xAB, 0x85);
+	lhr050h41_send_cmd_data(ctx, 0xAC, 0x1C);
+	lhr050h41_send_cmd_data(ctx, 0xAD, 0x1B);
+	lhr050h41_send_cmd_data(ctx, 0xAE, 0x51);
+	lhr050h41_send_cmd_data(ctx, 0xAF, 0x22);
+	lhr050h41_send_cmd_data(ctx, 0xB0, 0x2d);
+	lhr050h41_send_cmd_data(ctx, 0xB1, 0x4f);
+	lhr050h41_send_cmd_data(ctx, 0xB2, 0x59);
+	lhr050h41_send_cmd_data(ctx, 0xB3, 0x3F);
+	lhr050h41_send_cmd_data(ctx, 0xC0, 0x2A);
+	lhr050h41_send_cmd_data(ctx, 0xC1, 0x3a);
+	lhr050h41_send_cmd_data(ctx, 0xC2, 0x45);
+	lhr050h41_send_cmd_data(ctx, 0xC3, 0x0e);
+	lhr050h41_send_cmd_data(ctx, 0xC4, 0x11);
+	lhr050h41_send_cmd_data(ctx, 0xC5, 0x24);
+	lhr050h41_send_cmd_data(ctx, 0xC6, 0x1a);
+	lhr050h41_send_cmd_data(ctx, 0xC7, 0x1c);
+	lhr050h41_send_cmd_data(ctx, 0xC8, 0xaa);
+	lhr050h41_send_cmd_data(ctx, 0xC9, 0x1C);
+	lhr050h41_send_cmd_data(ctx, 0xCA, 0x29);
+	lhr050h41_send_cmd_data(ctx, 0xCB, 0x96);
+	lhr050h41_send_cmd_data(ctx, 0xCC, 0x1C);
+	lhr050h41_send_cmd_data(ctx, 0xCD, 0x1B);
+	lhr050h41_send_cmd_data(ctx, 0xCE, 0x51);
+	lhr050h41_send_cmd_data(ctx, 0xCF, 0x22);
+	lhr050h41_send_cmd_data(ctx, 0xD0, 0x2b);
+	lhr050h41_send_cmd_data(ctx, 0xD1, 0x4b);
+	lhr050h41_send_cmd_data(ctx, 0xD2, 0x59);
+	lhr050h41_send_cmd_data(ctx, 0xD3, 0x3F);
+
+	lhr050h41_switch_page(ctx, 0);
+	lhr050h41_send_cmd_data(ctx, 0x35, 0x00);
+	lhr050h41_send_cmd_data(ctx, 0x11, 0x00);
+
+	mdelay(120);
+
+	lhr050h41_send_cmd_data(ctx, 0x29, 0x00);
+
+	mdelay(20);
+
+	return 0;
+}
+
+static int lhr050h41_prepare(struct drm_panel *panel)
+{
+	struct lhr050h41 *ctx = panel_to_lhr050h41(panel);
+
+	/* Power the panel */
+	gpiod_set_value(ctx->power, 1);
+	mdelay(5);
+
+	/* And reset it */
+	gpiod_set_value(ctx->reset, 1);
+	mdelay(20);
+
+	gpiod_set_value(ctx->reset, 0);
+	mdelay(20);
+
+	lhr050h41_send_init_sequence(ctx);
+
+	return 0;
+}
+
+static void lhr050h41_enable_bl(struct lhr050h41 *ctx, bool enable)
+{
+	if (!ctx->backlight)
+		return;
+
+	if (enable) {
+		ctx->backlight->props.state &= ~BL_CORE_FBBLANK;
+		ctx->backlight->props.power = FB_BLANK_UNBLANK;
+	} else {
+		ctx->backlight->props.power = FB_BLANK_POWERDOWN;
+		ctx->backlight->props.state |= BL_CORE_FBBLANK;
+	}
+
+	backlight_update_status(ctx->backlight);
+}
+
+static int lhr050h41_enable(struct drm_panel *panel)
+{
+	struct lhr050h41 *ctx = panel_to_lhr050h41(panel);
+
+	lhr050h41_enable_bl(ctx, true);
+
+	return 0;
+}
+
+static int lhr050h41_disable(struct drm_panel *panel)
+{
+	struct lhr050h41 *ctx = panel_to_lhr050h41(panel);
+
+	lhr050h41_enable_bl(ctx, false);
+
+	return mipi_dsi_dcs_set_display_off(ctx->dsi);
+}
+
+static int lhr050h41_unprepare(struct drm_panel *panel)
+{
+	struct lhr050h41 *ctx = panel_to_lhr050h41(panel);
+
+	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
+	gpiod_set_value(ctx->power, 0);
+	gpiod_set_value(ctx->reset, 1);
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock		= 62000,
+	.vrefresh	= 60,
+
+	.hdisplay	= 720,
+	.hsync_start	= 720 + 10,
+	.hsync_end	= 720 + 10 + 20,
+	.htotal		= 720 + 10 + 20 + 30,
+
+	.vdisplay	= 1280,
+	.vsync_start	= 1280 + 10,
+	.vsync_end	= 1280 + 10 + 10,
+	.vtotal		= 1280 + 10 + 10 + 20,
+};
+
+static int lhr050h41_get_modes(struct drm_panel *panel)
+{
+	struct drm_connector *connector = panel->connector;
+	struct lhr050h41 *ctx = panel_to_lhr050h41(panel);
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(panel->drm, &default_mode);
+	if (!mode) {
+		dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%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;
+	drm_mode_probed_add(connector, mode);
+
+	panel->connector->display_info.width_mm = 62;
+	panel->connector->display_info.height_mm = 110;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs lhr050h41_funcs = {
+	.prepare	= lhr050h41_prepare,
+	.unprepare	= lhr050h41_unprepare,
+	.enable		= lhr050h41_enable,
+	.disable	= lhr050h41_disable,
+	.get_modes	= lhr050h41_get_modes,
+};
+
+static int lhr050h41_dsi_probe(struct mipi_dsi_device *dsi)
+{
+	struct device_node *np;
+	struct lhr050h41 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+	mipi_dsi_set_drvdata(dsi, ctx);
+	ctx->dsi = dsi;
+
+	drm_panel_init(&ctx->panel);
+	ctx->panel.dev = &dsi->dev;
+	ctx->panel.funcs = &lhr050h41_funcs;
+
+	ctx->power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->power)) {
+		dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
+		return PTR_ERR(ctx->power);
+	}
+
+	ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset)) {
+		dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+		return PTR_ERR(ctx->reset);
+	}
+
+	np = of_parse_phandle(dsi->dev.of_node, "backlight", 0);
+	if (np) {
+		ctx->backlight = of_find_backlight_by_node(np);
+		of_node_put(np);
+
+		if (!ctx->backlight)
+			return -EPROBE_DEFER;
+	}
+
+	ret = drm_panel_add(&ctx->panel);
+	if (ret < 0)
+		return ret;
+
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->lanes = 4;
+
+	return mipi_dsi_attach(dsi);
+}
+
+static int lhr050h41_dsi_remove(struct mipi_dsi_device *dsi)
+{
+	struct lhr050h41 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	mipi_dsi_detach(dsi);
+	drm_panel_remove(&ctx->panel);
+
+	if (ctx->backlight)
+		put_device(&ctx->backlight->dev);
+
+	return 0;
+}
+
+static const struct of_device_id lhr050h41_of_match[] = {
+	{ .compatible = "huarui,lhr050h41" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, lhr050h41_of_match);
+
+static struct mipi_dsi_driver lhr050h41_dsi_driver = {
+	.probe		= lhr050h41_dsi_probe,
+	.remove		= lhr050h41_dsi_remove,
+	.driver = {
+		.name		= "lhr050h41-dsi",
+		.of_match_table	= lhr050h41_of_match,
+	},
+};
+module_mipi_dsi_driver(lhr050h41_dsi_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Huarui LHR050H41 LCD Driver");
+MODULE_LICENSE("GPL v2");
-- 
git-series 0.9.1