drm: panel: add Khadas TS050 panel driver

This add support for the Khadas TS050 1080x1920 5" LCD DSI panel designed to work
with the Khadas Edge-V, Captain, VIM3 and VIM3L Single Board Computers.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

The init values was taken from the vendor source tree, comments were added to the
know values but most of the init table is undocumented.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
[narmstrong: call drm_panel_remove if mipi_dsi_attach fails]
Link: https://patchwork.freedesktop.org/patch/msgid/20201204081949.38418-3-narmstrong@baylibre.com

1 files changed, 870 insertions, 0 deletions

diff --git a/drivers/gpu/drm/panel/panel-khadas-ts050.c b/drivers/gpu/drm/panel/panel-khadas-ts050.c
new file mode 100644
index 000000000000..87aa2cc8ec2a
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-khadas-ts050.c
@@ -0,0 +1,870 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct khadas_ts050_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct regulator *supply;
+	struct gpio_desc *reset_gpio;
+	struct gpio_desc *enable_gpio;
+
+	bool prepared;
+	bool enabled;
+};
+
+struct khadas_ts050_panel_cmd {
+	u8 cmd;
+	u8 data;
+};
+
+/* Only the CMD1 User Command set is documented */
+static const struct khadas_ts050_panel_cmd init_code[] = {
+	/* Select Unknown CMD Page (Undocumented) */
+	{0xff, 0xee},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x1f, 0x45},
+	{0x24, 0x4f},
+	{0x38, 0xc8},
+	{0x39, 0x27},
+	{0x1e, 0x77},
+	{0x1d, 0x0f},
+	{0x7e, 0x71},
+	{0x7c, 0x03},
+	{0xff, 0x00},
+	{0xfb, 0x01},
+	{0x35, 0x01},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x01},
+	{0x01, 0x55},
+	{0x02, 0x40},
+	{0x05, 0x40},
+	{0x06, 0x4a},
+	{0x07, 0x24},
+	{0x08, 0x0c},
+	{0x0b, 0x7d},
+	{0x0c, 0x7d},
+	{0x0e, 0xb0},
+	{0x0f, 0xae},
+	{0x11, 0x10},
+	{0x12, 0x10},
+	{0x13, 0x03},
+	{0x14, 0x4a},
+	{0x15, 0x12},
+	{0x16, 0x12},
+	{0x18, 0x00},
+	{0x19, 0x77},
+	{0x1a, 0x55},
+	{0x1b, 0x13},
+	{0x1c, 0x00},
+	{0x1d, 0x00},
+	{0x1e, 0x13},
+	{0x1f, 0x00},
+	{0x23, 0x00},
+	{0x24, 0x00},
+	{0x25, 0x00},
+	{0x26, 0x00},
+	{0x27, 0x00},
+	{0x28, 0x00},
+	{0x35, 0x00},
+	{0x66, 0x00},
+	{0x58, 0x82},
+	{0x59, 0x02},
+	{0x5a, 0x02},
+	{0x5b, 0x02},
+	{0x5c, 0x82},
+	{0x5d, 0x82},
+	{0x5e, 0x02},
+	{0x5f, 0x02},
+	{0x72, 0x31},
+	/* Select CMD2 Page4 (Undocumented) */
+	{0xff, 0x05},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x01},
+	{0x01, 0x0b},
+	{0x02, 0x0c},
+	{0x03, 0x09},
+	{0x04, 0x0a},
+	{0x05, 0x00},
+	{0x06, 0x0f},
+	{0x07, 0x10},
+	{0x08, 0x00},
+	{0x09, 0x00},
+	{0x0a, 0x00},
+	{0x0b, 0x00},
+	{0x0c, 0x00},
+	{0x0d, 0x13},
+	{0x0e, 0x15},
+	{0x0f, 0x17},
+	{0x10, 0x01},
+	{0x11, 0x0b},
+	{0x12, 0x0c},
+	{0x13, 0x09},
+	{0x14, 0x0a},
+	{0x15, 0x00},
+	{0x16, 0x0f},
+	{0x17, 0x10},
+	{0x18, 0x00},
+	{0x19, 0x00},
+	{0x1a, 0x00},
+	{0x1b, 0x00},
+	{0x1c, 0x00},
+	{0x1d, 0x13},
+	{0x1e, 0x15},
+	{0x1f, 0x17},
+	{0x20, 0x00},
+	{0x21, 0x03},
+	{0x22, 0x01},
+	{0x23, 0x40},
+	{0x24, 0x40},
+	{0x25, 0xed},
+	{0x29, 0x58},
+	{0x2a, 0x12},
+	{0x2b, 0x01},
+	{0x4b, 0x06},
+	{0x4c, 0x11},
+	{0x4d, 0x20},
+	{0x4e, 0x02},
+	{0x4f, 0x02},
+	{0x50, 0x20},
+	{0x51, 0x61},
+	{0x52, 0x01},
+	{0x53, 0x63},
+	{0x54, 0x77},
+	{0x55, 0xed},
+	{0x5b, 0x00},
+	{0x5c, 0x00},
+	{0x5d, 0x00},
+	{0x5e, 0x00},
+	{0x5f, 0x15},
+	{0x60, 0x75},
+	{0x61, 0x00},
+	{0x62, 0x00},
+	{0x63, 0x00},
+	{0x64, 0x00},
+	{0x65, 0x00},
+	{0x66, 0x00},
+	{0x67, 0x00},
+	{0x68, 0x04},
+	{0x69, 0x00},
+	{0x6a, 0x00},
+	{0x6c, 0x40},
+	{0x75, 0x01},
+	{0x76, 0x01},
+	{0x7a, 0x80},
+	{0x7b, 0xa3},
+	{0x7c, 0xd8},
+	{0x7d, 0x60},
+	{0x7f, 0x15},
+	{0x80, 0x81},
+	{0x83, 0x05},
+	{0x93, 0x08},
+	{0x94, 0x10},
+	{0x8a, 0x00},
+	{0x9b, 0x0f},
+	{0xea, 0xff},
+	{0xec, 0x00},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x75, 0x00},
+	{0x76, 0xdf},
+	{0x77, 0x00},
+	{0x78, 0xe4},
+	{0x79, 0x00},
+	{0x7a, 0xed},
+	{0x7b, 0x00},
+	{0x7c, 0xf6},
+	{0x7d, 0x00},
+	{0x7e, 0xff},
+	{0x7f, 0x01},
+	{0x80, 0x07},
+	{0x81, 0x01},
+	{0x82, 0x10},
+	{0x83, 0x01},
+	{0x84, 0x18},
+	{0x85, 0x01},
+	{0x86, 0x20},
+	{0x87, 0x01},
+	{0x88, 0x3d},
+	{0x89, 0x01},
+	{0x8a, 0x56},
+	{0x8b, 0x01},
+	{0x8c, 0x84},
+	{0x8d, 0x01},
+	{0x8e, 0xab},
+	{0x8f, 0x01},
+	{0x90, 0xec},
+	{0x91, 0x02},
+	{0x92, 0x22},
+	{0x93, 0x02},
+	{0x94, 0x23},
+	{0x95, 0x02},
+	{0x96, 0x55},
+	{0x97, 0x02},
+	{0x98, 0x8b},
+	{0x99, 0x02},
+	{0x9a, 0xaf},
+	{0x9b, 0x02},
+	{0x9c, 0xdf},
+	{0x9d, 0x03},
+	{0x9e, 0x01},
+	{0x9f, 0x03},
+	{0xa0, 0x2c},
+	{0xa2, 0x03},
+	{0xa3, 0x39},
+	{0xa4, 0x03},
+	{0xa5, 0x47},
+	{0xa6, 0x03},
+	{0xa7, 0x56},
+	{0xa9, 0x03},
+	{0xaa, 0x66},
+	{0xab, 0x03},
+	{0xac, 0x76},
+	{0xad, 0x03},
+	{0xae, 0x85},
+	{0xaf, 0x03},
+	{0xb0, 0x90},
+	{0xb1, 0x03},
+	{0xb2, 0xcb},
+	{0xb3, 0x00},
+	{0xb4, 0xdf},
+	{0xb5, 0x00},
+	{0xb6, 0xe4},
+	{0xb7, 0x00},
+	{0xb8, 0xed},
+	{0xb9, 0x00},
+	{0xba, 0xf6},
+	{0xbb, 0x00},
+	{0xbc, 0xff},
+	{0xbd, 0x01},
+	{0xbe, 0x07},
+	{0xbf, 0x01},
+	{0xc0, 0x10},
+	{0xc1, 0x01},
+	{0xc2, 0x18},
+	{0xc3, 0x01},
+	{0xc4, 0x20},
+	{0xc5, 0x01},
+	{0xc6, 0x3d},
+	{0xc7, 0x01},
+	{0xc8, 0x56},
+	{0xc9, 0x01},
+	{0xca, 0x84},
+	{0xcb, 0x01},
+	{0xcc, 0xab},
+	{0xcd, 0x01},
+	{0xce, 0xec},
+	{0xcf, 0x02},
+	{0xd0, 0x22},
+	{0xd1, 0x02},
+	{0xd2, 0x23},
+	{0xd3, 0x02},
+	{0xd4, 0x55},
+	{0xd5, 0x02},
+	{0xd6, 0x8b},
+	{0xd7, 0x02},
+	{0xd8, 0xaf},
+	{0xd9, 0x02},
+	{0xda, 0xdf},
+	{0xdb, 0x03},
+	{0xdc, 0x01},
+	{0xdd, 0x03},
+	{0xde, 0x2c},
+	{0xdf, 0x03},
+	{0xe0, 0x39},
+	{0xe1, 0x03},
+	{0xe2, 0x47},
+	{0xe3, 0x03},
+	{0xe4, 0x56},
+	{0xe5, 0x03},
+	{0xe6, 0x66},
+	{0xe7, 0x03},
+	{0xe8, 0x76},
+	{0xe9, 0x03},
+	{0xea, 0x85},
+	{0xeb, 0x03},
+	{0xec, 0x90},
+	{0xed, 0x03},
+	{0xee, 0xcb},
+	{0xef, 0x00},
+	{0xf0, 0xbb},
+	{0xf1, 0x00},
+	{0xf2, 0xc0},
+	{0xf3, 0x00},
+	{0xf4, 0xcc},
+	{0xf5, 0x00},
+	{0xf6, 0xd6},
+	{0xf7, 0x00},
+	{0xf8, 0xe1},
+	{0xf9, 0x00},
+	{0xfa, 0xea},
+	/* Select CMD2 Page2 (Undocumented) */
+	{0xff, 0x02},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	{0x00, 0x00},
+	{0x01, 0xf4},
+	{0x02, 0x00},
+	{0x03, 0xef},
+	{0x04, 0x01},
+	{0x05, 0x07},
+	{0x06, 0x01},
+	{0x07, 0x28},
+	{0x08, 0x01},
+	{0x09, 0x44},
+	{0x0a, 0x01},
+	{0x0b, 0x76},
+	{0x0c, 0x01},
+	{0x0d, 0xa0},
+	{0x0e, 0x01},
+	{0x0f, 0xe7},
+	{0x10, 0x02},
+	{0x11, 0x1f},
+	{0x12, 0x02},
+	{0x13, 0x22},
+	{0x14, 0x02},
+	{0x15, 0x54},
+	{0x16, 0x02},
+	{0x17, 0x8b},
+	{0x18, 0x02},
+	{0x19, 0xaf},
+	{0x1a, 0x02},
+	{0x1b, 0xe0},
+	{0x1c, 0x03},
+	{0x1d, 0x01},
+	{0x1e, 0x03},
+	{0x1f, 0x2d},
+	{0x20, 0x03},
+	{0x21, 0x39},
+	{0x22, 0x03},
+	{0x23, 0x47},
+	{0x24, 0x03},
+	{0x25, 0x57},
+	{0x26, 0x03},
+	{0x27, 0x65},
+	{0x28, 0x03},
+	{0x29, 0x77},
+	{0x2a, 0x03},
+	{0x2b, 0x85},
+	{0x2d, 0x03},
+	{0x2f, 0x8f},
+	{0x30, 0x03},
+	{0x31, 0xcb},
+	{0x32, 0x00},
+	{0x33, 0xbb},
+	{0x34, 0x00},
+	{0x35, 0xc0},
+	{0x36, 0x00},
+	{0x37, 0xcc},
+	{0x38, 0x00},
+	{0x39, 0xd6},
+	{0x3a, 0x00},
+	{0x3b, 0xe1},
+	{0x3d, 0x00},
+	{0x3f, 0xea},
+	{0x40, 0x00},
+	{0x41, 0xf4},
+	{0x42, 0x00},
+	{0x43, 0xfe},
+	{0x44, 0x01},
+	{0x45, 0x07},
+	{0x46, 0x01},
+	{0x47, 0x28},
+	{0x48, 0x01},
+	{0x49, 0x44},
+	{0x4a, 0x01},
+	{0x4b, 0x76},
+	{0x4c, 0x01},
+	{0x4d, 0xa0},
+	{0x4e, 0x01},
+	{0x4f, 0xe7},
+	{0x50, 0x02},
+	{0x51, 0x1f},
+	{0x52, 0x02},
+	{0x53, 0x22},
+	{0x54, 0x02},
+	{0x55, 0x54},
+	{0x56, 0x02},
+	{0x58, 0x8b},
+	{0x59, 0x02},
+	{0x5a, 0xaf},
+	{0x5b, 0x02},
+	{0x5c, 0xe0},
+	{0x5d, 0x03},
+	{0x5e, 0x01},
+	{0x5f, 0x03},
+	{0x60, 0x2d},
+	{0x61, 0x03},
+	{0x62, 0x39},
+	{0x63, 0x03},
+	{0x64, 0x47},
+	{0x65, 0x03},
+	{0x66, 0x57},
+	{0x67, 0x03},
+	{0x68, 0x65},
+	{0x69, 0x03},
+	{0x6a, 0x77},
+	{0x6b, 0x03},
+	{0x6c, 0x85},
+	{0x6d, 0x03},
+	{0x6e, 0x8f},
+	{0x6f, 0x03},
+	{0x70, 0xcb},
+	{0x71, 0x00},
+	{0x72, 0x00},
+	{0x73, 0x00},
+	{0x74, 0x21},
+	{0x75, 0x00},
+	{0x76, 0x4c},
+	{0x77, 0x00},
+	{0x78, 0x6b},
+	{0x79, 0x00},
+	{0x7a, 0x85},
+	{0x7b, 0x00},
+	{0x7c, 0x9a},
+	{0x7d, 0x00},
+	{0x7e, 0xad},
+	{0x7f, 0x00},
+	{0x80, 0xbe},
+	{0x81, 0x00},
+	{0x82, 0xcd},
+	{0x83, 0x01},
+	{0x84, 0x01},
+	{0x85, 0x01},
+	{0x86, 0x29},
+	{0x87, 0x01},
+	{0x88, 0x68},
+	{0x89, 0x01},
+	{0x8a, 0x98},
+	{0x8b, 0x01},
+	{0x8c, 0xe5},
+	{0x8d, 0x02},
+	{0x8e, 0x1e},
+	{0x8f, 0x02},
+	{0x90, 0x30},
+	{0x91, 0x02},
+	{0x92, 0x52},
+	{0x93, 0x02},
+	{0x94, 0x88},
+	{0x95, 0x02},
+	{0x96, 0xaa},
+	{0x97, 0x02},
+	{0x98, 0xd7},
+	{0x99, 0x02},
+	{0x9a, 0xf7},
+	{0x9b, 0x03},
+	{0x9c, 0x21},
+	{0x9d, 0x03},
+	{0x9e, 0x2e},
+	{0x9f, 0x03},
+	{0xa0, 0x3d},
+	{0xa2, 0x03},
+	{0xa3, 0x4c},
+	{0xa4, 0x03},
+	{0xa5, 0x5e},
+	{0xa6, 0x03},
+	{0xa7, 0x71},
+	{0xa9, 0x03},
+	{0xaa, 0x86},
+	{0xab, 0x03},
+	{0xac, 0x94},
+	{0xad, 0x03},
+	{0xae, 0xfa},
+	{0xaf, 0x00},
+	{0xb0, 0x00},
+	{0xb1, 0x00},
+	{0xb2, 0x21},
+	{0xb3, 0x00},
+	{0xb4, 0x4c},
+	{0xb5, 0x00},
+	{0xb6, 0x6b},
+	{0xb7, 0x00},
+	{0xb8, 0x85},
+	{0xb9, 0x00},
+	{0xba, 0x9a},
+	{0xbb, 0x00},
+	{0xbc, 0xad},
+	{0xbd, 0x00},
+	{0xbe, 0xbe},
+	{0xbf, 0x00},
+	{0xc0, 0xcd},
+	{0xc1, 0x01},
+	{0xc2, 0x01},
+	{0xc3, 0x01},
+	{0xc4, 0x29},
+	{0xc5, 0x01},
+	{0xc6, 0x68},
+	{0xc7, 0x01},
+	{0xc8, 0x98},
+	{0xc9, 0x01},
+	{0xca, 0xe5},
+	{0xcb, 0x02},
+	{0xcc, 0x1e},
+	{0xcd, 0x02},
+	{0xce, 0x20},
+	{0xcf, 0x02},
+	{0xd0, 0x52},
+	{0xd1, 0x02},
+	{0xd2, 0x88},
+	{0xd3, 0x02},
+	{0xd4, 0xaa},
+	{0xd5, 0x02},
+	{0xd6, 0xd7},
+	{0xd7, 0x02},
+	{0xd8, 0xf7},
+	{0xd9, 0x03},
+	{0xda, 0x21},
+	{0xdb, 0x03},
+	{0xdc, 0x2e},
+	{0xdd, 0x03},
+	{0xde, 0x3d},
+	{0xdf, 0x03},
+	{0xe0, 0x4c},
+	{0xe1, 0x03},
+	{0xe2, 0x5e},
+	{0xe3, 0x03},
+	{0xe4, 0x71},
+	{0xe5, 0x03},
+	{0xe6, 0x86},
+	{0xe7, 0x03},
+	{0xe8, 0x94},
+	{0xe9, 0x03},
+	{0xea, 0xfa},
+	/* Select CMD2 Page0 (Undocumented) */
+	{0xff, 0x01},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD2 Page1 (Undocumented) */
+	{0xff, 0x02},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD2 Page3 (Undocumented) */
+	{0xff, 0x04},
+	/* Reload CMD1: Don't reload default value to register */
+	{0xfb, 0x01},
+	/* Select CMD1 */
+	{0xff, 0x00},
+	{0xd3, 0x05}, /* RGBMIPICTRL: VSYNC back porch = 5 */
+	{0xd4, 0x04}, /* RGBMIPICTRL: VSYNC front porch = 4 */
+};
+
+static inline
+struct khadas_ts050_panel *to_khadas_ts050_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct khadas_ts050_panel, base);
+}
+
+static int khadas_ts050_panel_prepare(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	unsigned int i;
+	int err;
+
+	if (khadas_ts050->prepared)
+		return 0;
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+
+	err = regulator_enable(khadas_ts050->supply);
+	if (err < 0)
+		return err;
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 1);
+
+	msleep(60);
+
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	usleep_range(10000, 11000);
+
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 0);
+
+	/* Select CMD2 page 4 (Undocumented) */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xff, (u8[]){ 0x05 }, 1);
+
+	/* Reload CMD1: Don't reload default value to register */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xfb, (u8[]){ 0x01 }, 1);
+
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xc5, (u8[]){ 0x01 }, 1);
+
+	msleep(100);
+
+	for (i = 0; i < ARRAY_SIZE(init_code); i++) {
+		err = mipi_dsi_dcs_write(khadas_ts050->link,
+					 init_code[i].cmd,
+					 &init_code[i].data, 1);
+		if (err < 0) {
+			dev_err(panel->dev, "failed write cmds: %d\n", err);
+			goto poweroff;
+		}
+	}
+
+	err = mipi_dsi_dcs_exit_sleep_mode(khadas_ts050->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
+		goto poweroff;
+	}
+
+	msleep(120);
+
+	/* Select CMD1 */
+	mipi_dsi_dcs_write(khadas_ts050->link, 0xff, (u8[]){ 0x00 }, 1);
+
+	err = mipi_dsi_dcs_set_tear_on(khadas_ts050->link,
+				       MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set tear on: %d\n", err);
+		goto poweroff;
+	}
+
+	err = mipi_dsi_dcs_set_display_on(khadas_ts050->link);
+	if (err < 0) {
+		dev_err(panel->dev, "failed to set display on: %d\n", err);
+		goto poweroff;
+	}
+
+	usleep_range(10000, 11000);
+
+	khadas_ts050->prepared = true;
+
+	return 0;
+
+poweroff:
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	regulator_disable(khadas_ts050->supply);
+
+	return err;
+}
+
+static int khadas_ts050_panel_unprepare(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	int err;
+
+	if (!khadas_ts050->prepared)
+		return 0;
+
+	khadas_ts050->prepared = false;
+
+	err = mipi_dsi_dcs_enter_sleep_mode(khadas_ts050->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
+
+	msleep(150);
+
+	gpiod_set_value_cansleep(khadas_ts050->enable_gpio, 0);
+	gpiod_set_value_cansleep(khadas_ts050->reset_gpio, 1);
+
+	err = regulator_disable(khadas_ts050->supply);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int khadas_ts050_panel_enable(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+
+	khadas_ts050->enabled = true;
+
+	return 0;
+}
+
+static int khadas_ts050_panel_disable(struct drm_panel *panel)
+{
+	struct khadas_ts050_panel *khadas_ts050 = to_khadas_ts050_panel(panel);
+	int err;
+
+	if (!khadas_ts050->enabled)
+		return 0;
+
+	err = mipi_dsi_dcs_set_display_off(khadas_ts050->link);
+	if (err < 0)
+		dev_err(panel->dev, "failed to set display off: %d\n", err);
+
+	usleep_range(10000, 11000);
+
+	khadas_ts050->enabled = false;
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.clock = 120000,
+	.hdisplay = 1088,
+	.hsync_start = 1088 + 104,
+	.hsync_end = 1088 + 104 + 4,
+	.htotal = 1088 + 104 + 4 + 127,
+	.vdisplay = 1920,
+	.vsync_start = 1920 + 4,
+	.vsync_end = 1920 + 4 + 2,
+	.vtotal = 1920 + 4 + 2 + 3,
+	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+};
+
+static int khadas_ts050_panel_get_modes(struct drm_panel *panel,
+					struct drm_connector *connector)
+{
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(&default_mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	drm_mode_probed_add(connector, mode);
+
+	connector->display_info.width_mm = 64;
+	connector->display_info.height_mm = 118;
+	connector->display_info.bpc = 8;
+
+	return 1;
+}
+
+static const struct drm_panel_funcs khadas_ts050_panel_funcs = {
+	.prepare = khadas_ts050_panel_prepare,
+	.unprepare = khadas_ts050_panel_unprepare,
+	.enable = khadas_ts050_panel_enable,
+	.disable = khadas_ts050_panel_disable,
+	.get_modes = khadas_ts050_panel_get_modes,
+};
+
+static const struct of_device_id khadas_ts050_of_match[] = {
+	{ .compatible = "khadas,ts050", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, khadas_ts050_of_match);
+
+static int khadas_ts050_panel_add(struct khadas_ts050_panel *khadas_ts050)
+{
+	struct device *dev = &khadas_ts050->link->dev;
+	int err;
+
+	khadas_ts050->supply = devm_regulator_get(dev, "power");
+	if (IS_ERR(khadas_ts050->supply))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->supply),
+				     "failed to get power supply");
+
+	khadas_ts050->reset_gpio = devm_gpiod_get(dev, "reset",
+						  GPIOD_OUT_LOW);
+	if (IS_ERR(khadas_ts050->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->reset_gpio),
+				     "failed to get reset gpio");
+
+	khadas_ts050->enable_gpio = devm_gpiod_get(dev, "enable",
+						   GPIOD_OUT_HIGH);
+	if (IS_ERR(khadas_ts050->enable_gpio))
+		return dev_err_probe(dev, PTR_ERR(khadas_ts050->reset_gpio),
+				     "failed to get enable gpio");
+
+	drm_panel_init(&khadas_ts050->base, &khadas_ts050->link->dev,
+		       &khadas_ts050_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	err = drm_panel_of_backlight(&khadas_ts050->base);
+	if (err)
+		return err;
+
+	drm_panel_add(&khadas_ts050->base);
+
+	return 0;
+}
+
+static int khadas_ts050_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050;
+	int err;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;
+
+	khadas_ts050 = devm_kzalloc(&dsi->dev, sizeof(*khadas_ts050),
+				    GFP_KERNEL);
+	if (!khadas_ts050)
+		return -ENOMEM;
+
+	mipi_dsi_set_drvdata(dsi, khadas_ts050);
+	khadas_ts050->link = dsi;
+
+	err = khadas_ts050_panel_add(khadas_ts050);
+	if (err < 0)
+		return err;
+
+	err = mipi_dsi_attach(dsi);
+	if (err)
+		drm_panel_remove(&khadas_ts050->base);
+
+	return err;
+}
+
+static int khadas_ts050_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050 = mipi_dsi_get_drvdata(dsi);
+	int err;
+
+	err = mipi_dsi_detach(dsi);
+	if (err < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+	drm_panel_remove(&khadas_ts050->base);
+	drm_panel_disable(&khadas_ts050->base);
+	drm_panel_unprepare(&khadas_ts050->base);
+
+	return 0;
+}
+
+static void khadas_ts050_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct khadas_ts050_panel *khadas_ts050 = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_disable(&khadas_ts050->base);
+	drm_panel_unprepare(&khadas_ts050->base);
+}
+
+static struct mipi_dsi_driver khadas_ts050_panel_driver = {
+	.driver = {
+		.name = "panel-khadas-ts050",
+		.of_match_table = khadas_ts050_of_match,
+	},
+	.probe = khadas_ts050_panel_probe,
+	.remove = khadas_ts050_panel_remove,
+	.shutdown = khadas_ts050_panel_shutdown,
+};
+module_mipi_dsi_driver(khadas_ts050_panel_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("Khadas TS050 panel driver");
+MODULE_LICENSE("GPL v2");