[PATCH 2/2] drm/panel: Add panel driver for Chipone ICNA35XX based panels

[Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@kernel.org>]

From: Teguh Sobirin <teguh@sobir.in>

This adds support for the ICNA3512 and ICNA3520 DDICs used in the AYN
Odin 2 Portal and for both the AYN Odin 3 and the AYN Thor top panel
respectively.

Signed-off-by: Teguh Sobirin <teguh@sobir.in>
Co-developed-by: Aaron Kling <webgeek1234@gmail.com>
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 drivers/gpu/drm/panel/Kconfig                  |  11 +
 drivers/gpu/drm/panel/Makefile                 |   1 +
 drivers/gpu/drm/panel/panel-chipone-icna35xx.c | 618 +++++++++++++++++++++++++
 3 files changed, 630 insertions(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7450b27622a233..1368b5a0b6c912 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_CHIPONE_ICNA35XX
+	tristate "Chipone ICNA35XX panel driver"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_DISPLAY_HELPER
+	help
+	  Say Y here if you want to enable support for the panels built
+	  around the Chipone ICNA3512 and ICNA3520 display controllers,
+	  such as some Tianma panels used in AYN Odin2 Portal and Thor.
+
 config DRM_PANEL_CHIPWEALTH_CH13726A
 	tristate "CHIPWEALTH CH13726A-based DSI panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index c2c5cf81711633..d39a8f82fa8c06 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-$(CONFIG_DRM_PANEL_CHIPONE_ICNA35XX) += panel-chipone-icna35xx.o
 obj-$(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
diff --git a/drivers/gpu/drm/panel/panel-chipone-icna35xx.c b/drivers/gpu/drm/panel/panel-chipone-icna35xx.c
new file mode 100644
index 00000000000000..1be903270db8e2
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-chipone-icna35xx.c
@@ -0,0 +1,618 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Chipone ICNA35XX Driver IC panels driver
+ *
+ * Copyright (c) 2025 Teguh Sobirin <teguh@sobir.in>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct panel_info {
+	struct drm_panel panel;
+	struct drm_connector *connector;
+	struct mipi_dsi_device *dsi;
+	struct panel_desc *desc;
+	enum drm_panel_orientation orientation;
+
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data *supplies;
+};
+
+struct panel_desc {
+	unsigned int width_mm;
+	unsigned int height_mm;
+
+	unsigned int bpc;
+	unsigned int lanes;
+	unsigned long mode_flags;
+	enum mipi_dsi_pixel_format format;
+
+	const struct drm_display_mode *modes;
+	unsigned int num_modes;
+	int (*init_sequence)(struct panel_info *pinfo);
+
+	struct drm_dsc_config dsc;
+};
+
+static const struct regulator_bulk_data panel_supplies[] = {
+	{ .supply = "vdd" },
+	{ .supply = "vddio" },
+	{ .supply = "vci" },
+	{ .supply = "disp" },
+	{ .supply = "blvdd" },
+};
+
+static inline struct panel_info *to_panel_info(struct drm_panel *panel)
+{
+	return container_of(panel, struct panel_info, panel);
+}
+
+static int icna35xx_get_current_mode(struct panel_info *pinfo)
+{
+	struct drm_connector *connector = pinfo->connector;
+	struct drm_crtc_state *crtc_state;
+	int i;
+
+	/* Return the default (first) mode if no info available yet */
+	if (!connector->state || !connector->state->crtc)
+		return 0;
+
+	crtc_state = connector->state->crtc->state;
+
+	for (i = 0; i < pinfo->desc->num_modes; i++) {
+		if (drm_mode_match(&crtc_state->mode,
+				   &pinfo->desc->modes[i],
+				   DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK))
+			return i;
+	}
+
+	return 0;
+}
+
+static int icna3512_init_sequence(struct panel_info *pinfo)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = pinfo->dsi };
+	struct drm_dsc_picture_parameter_set pps;
+
+	int cur_mode = icna35xx_get_current_mode(pinfo);
+	int cur_vrefresh = drm_mode_vrefresh(&pinfo->desc->modes[cur_mode]);
+
+	pinfo->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9C, 0xA5, 0xA5);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xFD, 0x5A, 0x5A);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x53, 0xE0);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x0F);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xCE, 0x22);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x01);
+	if (cur_vrefresh == 165) {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x20);
+	} else if (cur_vrefresh == 144) {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xE0, 0xA0, 0x10, 0xC8, 0x00, 0x02, 0x83,
+			0x00, 0x10, 0x14, 0x00, 0x00, 0xC3, 0x00, 0x10,
+			0x14, 0x00, 0x00, 0xE0, 0x00, 0x10, 0x14, 0x00,
+			0x00, 0xE0, 0xA0, 0x10, 0xC8, 0x22, 0x18, 0x18,
+			0x18, 0x18, 0x18);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x07);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB5,
+			0x04, 0x0A, 0x08, 0x0A, 0x04, 0x00, 0xC4);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xD9,
+			0x66, 0xE4, 0xE4, 0x66, 0xE4, 0xE4, 0x00, 0xC4,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xCE,
+			0x01, 0x01, 0x01, 0x01, 0x04, 0x07, 0xA4);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x30);
+	} else if (cur_vrefresh == 120) {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xE0, 0xA0, 0x10, 0xC8, 0x00, 0x02, 0x83,
+			0x00, 0x10, 0x14, 0x00, 0x00, 0xC3, 0x00, 0x10,
+			0x14, 0x00, 0x00, 0xE0, 0x10, 0x10, 0x9C, 0x00,
+			0x00, 0xE0, 0xA0, 0x10, 0xC8, 0x22, 0x18, 0x18,
+			0x18, 0x18, 0x18);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x07);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB5,
+			0x04, 0x0C, 0x08, 0x0C, 0x04, 0x00, 0xC4);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xD9,
+			0x88, 0x40, 0x40, 0x88, 0x40, 0x40, 0x00, 0xEB,
+			0x11, 0xFF);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xCE,
+			0x01, 0x01, 0x01, 0x01, 0x04, 0x09, 0x2C);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x30);
+	} else if (cur_vrefresh == 90) {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xE0, 0x40, 0x10, 0xA8, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x07);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB2,
+			0x04, 0x10, 0x08, 0x0C, 0x04, 0x00, 0xC4);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xD3,
+			0x55, 0x80, 0x80, 0x55, 0x80, 0xB0, 0x00, 0x9C,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xCB,
+			0x01, 0x01, 0x01, 0x01, 0x04, 0x06, 0x1C);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x00);
+	} else {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xE0, 0xA0, 0x10, 0xC8, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x07);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB2,
+			0x04, 0x18, 0x08, 0x0C, 0x02, 0x00, 0xC4);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xD3,
+			0x88, 0x4A, 0x4A, 0x88, 0x4A, 0x4A, 0x00, 0xEB,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xCB,
+			0x01, 0x01, 0x01, 0x01, 0x04, 0x2C);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x00);
+	}
+
+	drm_dsc_pps_payload_pack(&pps, &pinfo->desc->dsc);
+	mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
+
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+	return dsi_ctx.accum_err;
+}
+
+static int icna3520_init_sequence(struct panel_info *pinfo)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = pinfo->dsi };
+	struct drm_dsc_picture_parameter_set pps;
+
+	int cur_mode = icna35xx_get_current_mode(pinfo);
+	int cur_vrefresh = drm_mode_vrefresh(&pinfo->desc->modes[cur_mode]);
+
+	pinfo->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9C, 0xA5, 0xA5);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xFD, 0x5A, 0x5A);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x53, 0xE0);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);
+
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	if (cur_vrefresh == 120) {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xD8, 0x00, 0x1C, 0x00, 0x4C);
+	} else {
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x10);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x00);
+		mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB3,
+			0x00, 0xDB, 0x00, 0x1C, 0x00, 0x1C, 0x00, 0x00,
+			0xDB, 0x00, 0x1C, 0x07, 0xD6, 0x00);
+	}
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x01);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB2, 0x00);
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x9F, 0x0D);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB2, 0x27);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB6, 0x03);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xBB, 0x01);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xB2, 0x24);
+
+	drm_dsc_pps_payload_pack(&pps, &pinfo->desc->dsc);
+	mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
+
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+	return dsi_ctx.accum_err;
+}
+
+static const struct drm_display_mode odin2portal_modes[] = {
+	{
+		/* 165Hz */
+		.clock = (1080 + 98 + 1 + 23) * (1920 + 20 + 1 + 15) * 165 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 98,
+		.hsync_end = 1080 + 98 + 1,
+		.htotal = 1080 + 98 + 1 + 23,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 20,
+		.vsync_end = 1920 + 20 + 1,
+		.vtotal = 1920 + 20 + 1 + 15,
+	},
+	{
+		/* 144Hz */
+		.clock = (1080 + 156 + 1 + 23) * (1920 + 20 + 1 + 15) * 144 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 156,
+		.hsync_end = 1080 + 156 + 1,
+		.htotal = 1080 + 156 + 1 + 23,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 20,
+		.vsync_end = 1920 + 20 + 1,
+		.vtotal = 1920 + 20 + 1 + 15,
+	},
+	{
+		/* 120Hz */
+		.clock = (1080 + 156 + 1 + 23) * (1920 + 412 + 1 + 15) * 120 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 156,
+		.hsync_end = 1080 + 156 + 1,
+		.htotal = 1080 + 156 + 1 + 23,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 412,
+		.vsync_end = 1920 + 412 + 1,
+		.vtotal = 1920 + 412 + 1 + 15,
+	},
+	{
+		/* 90Hz */
+		.clock = (1080 + 156 + 1 + 23) * (1920 + 1192 + 1 + 15) * 90 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 156,
+		.hsync_end = 1080 + 156 + 1,
+		.htotal = 1080 + 156 + 1 + 23,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 1192,
+		.vsync_end = 1920 + 1192 + 1,
+		.vtotal = 1920 + 1192 + 1 + 15,
+	},
+	{
+		/* 60Hz */
+		.clock = (1080 + 156 + 1 + 23) * (1920 + 2760 + 1 + 15) * 60 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 156,
+		.hsync_end = 1080 + 156 + 1,
+		.htotal = 1080 + 156 + 1 + 23,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 2760,
+		.vsync_end = 1920 + 2760 + 1,
+		.vtotal = 1920 + 2760 + 1 + 15,
+	}
+};
+
+static const struct drm_display_mode thor_top_modes[] = {
+	{
+		/* 120Hz */
+		.clock = (1080 + 24 + 1 + 24) * (1920 + 28 + 1 + 28) * 120 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 24,
+		.hsync_end = 1080 + 24 + 1,
+		.htotal = 1080 + 24 + 1 + 24,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 28,
+		.vsync_end = 1920 + 28 + 1,
+		.vtotal = 1920 + 28 + 1 + 28,
+	},
+	{
+		/* 60Hz */
+		.clock = (1080 + 24 + 1 + 24) * (1920 + 2006 + 1 + 28) * 60 / 1000,
+		.hdisplay = 1080,
+		.hsync_start = 1080 + 24,
+		.hsync_end = 1080 + 24 + 1,
+		.htotal = 1080 + 24 + 1 + 24,
+		.vdisplay = 1920,
+		.vsync_start = 1920 + 2006,
+		.vsync_end = 1920 + 2006 + 1,
+		.vtotal = 1920 + 2006 + 1 + 28,
+	}
+};
+
+static struct panel_desc odin2portal_desc = {
+	.modes = odin2portal_modes,
+	.num_modes = ARRAY_SIZE(odin2portal_modes),
+	.width_mm = 160,
+	.height_mm = 89,
+	.bpc = 8,
+	.lanes = 4,
+	.format = MIPI_DSI_FMT_RGB888,
+	.mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+			MIPI_DSI_MODE_LPM,
+	.init_sequence = icna3512_init_sequence,
+	.dsc = {
+		.dsc_version_major = 0x1,
+		.dsc_version_minor = 0x1,
+		.slice_height = 20,
+		.slice_width = 540,
+		.slice_count = 2,
+		.bits_per_component = 8,
+		.bits_per_pixel = 8 << 4,
+		.block_pred_enable = true,
+	},
+};
+
+static struct panel_desc thor_top_desc = {
+	.modes = thor_top_modes,
+	.num_modes = ARRAY_SIZE(thor_top_modes),
+	.width_mm = 136,
+	.height_mm = 68,
+	.bpc = 8,
+	.lanes = 4,
+	.format = MIPI_DSI_FMT_RGB888,
+	.mode_flags =  MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS |
+			MIPI_DSI_MODE_LPM,
+	.init_sequence = icna3520_init_sequence,
+	.dsc = {
+		.dsc_version_major = 0x1,
+		.dsc_version_minor = 0x1,
+		.slice_height = 12,
+		.slice_width = 540,
+		.slice_count = 2,
+		.bits_per_component = 8,
+		.bits_per_pixel = 8 << 4,
+		.block_pred_enable = true,
+	},
+};
+
+static void icna35xx_reset(struct panel_info *pinfo)
+{
+	gpiod_set_value_cansleep(pinfo->reset_gpio, 0);
+	usleep_range(20000, 21000);
+	gpiod_set_value_cansleep(pinfo->reset_gpio, 1);
+	usleep_range(20000, 21000);
+	gpiod_set_value_cansleep(pinfo->reset_gpio, 0);
+	usleep_range(20000, 21000);
+}
+
+static int icna35xx_prepare(struct drm_panel *panel)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(panel_supplies), pinfo->supplies);
+	if (ret < 0) {
+		dev_err(panel->dev, "failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
+	icna35xx_reset(pinfo);
+
+	ret = pinfo->desc->init_sequence(pinfo);
+	if (ret < 0) {
+		regulator_bulk_disable(ARRAY_SIZE(panel_supplies), pinfo->supplies);
+		dev_err(panel->dev, "failed to initialize panel: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int icna35xx_disable(struct drm_panel *panel)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = pinfo->dsi };
+
+	pinfo->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);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	return dsi_ctx.accum_err;
+}
+
+static int icna35xx_unprepare(struct drm_panel *panel)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+
+	gpiod_set_value_cansleep(pinfo->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(panel_supplies), pinfo->supplies);
+
+	return 0;
+}
+
+static void icna35xx_remove(struct mipi_dsi_device *dsi)
+{
+	struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi);
+	int ret;
+
+	ret = mipi_dsi_detach(pinfo->dsi);
+	if (ret < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
+
+	drm_panel_remove(&pinfo->panel);
+}
+
+static int icna35xx_get_modes(struct drm_panel *panel,
+			       struct drm_connector *connector)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+	int i;
+
+	for (i = 0; i < pinfo->desc->num_modes; i++) {
+		const struct drm_display_mode *m = &pinfo->desc->modes[i];
+		struct drm_display_mode *mode;
+
+		mode = drm_mode_duplicate(connector->dev, m);
+		if (!mode) {
+			dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+				m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
+			return -ENOMEM;
+		}
+
+		mode->type = DRM_MODE_TYPE_DRIVER;
+		if (i == 0)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_set_name(mode);
+		drm_mode_probed_add(connector, mode);
+	}
+
+	connector->display_info.width_mm = pinfo->desc->width_mm;
+	connector->display_info.height_mm = pinfo->desc->height_mm;
+	connector->display_info.bpc = pinfo->desc->bpc;
+	pinfo->connector = connector;
+
+	return pinfo->desc->num_modes;
+}
+
+static enum drm_panel_orientation icna35xx_get_orientation(struct drm_panel *panel)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+
+	return pinfo->orientation;
+}
+
+static const struct drm_panel_funcs icna35xx_panel_funcs = {
+	.disable = icna35xx_disable,
+	.prepare = icna35xx_prepare,
+	.unprepare = icna35xx_unprepare,
+	.get_modes = icna35xx_get_modes,
+	.get_orientation = icna35xx_get_orientation,
+};
+
+static int icna35xx_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_large(dsi, brightness);
+	if (ret < 0)
+		return ret;
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return 0;
+}
+
+static int icna35xx_bl_get_brightness(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness;
+	int ret;
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
+	if (ret < 0)
+		return ret;
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return brightness;
+}
+
+static const struct backlight_ops icna35xx_bl_ops = {
+	.update_status = icna35xx_bl_update_status,
+	.get_brightness = icna35xx_bl_get_brightness,
+};
+
+static struct backlight_device *icna35xx_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 4096,
+		.max_brightness = 4096,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+					      &icna35xx_bl_ops, &props);
+}
+
+static int icna35xx_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct panel_info *pinfo;
+	int ret;
+
+	pinfo = devm_drm_panel_alloc(dev, __typeof(*pinfo), panel,
+				     &icna35xx_panel_funcs,
+				     DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(pinfo))
+		return PTR_ERR(pinfo);
+
+	ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(panel_supplies),
+	panel_supplies, &pinfo->supplies);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+	pinfo->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(pinfo->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(pinfo->reset_gpio), "failed to get reset gpio\n");
+
+	pinfo->desc = (struct panel_desc *)of_device_get_match_data(dev);
+	if (!pinfo->desc)
+		return -ENODEV;
+
+	pinfo->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, pinfo);
+
+	ret = of_drm_get_panel_orientation(dev->of_node, &pinfo->orientation);
+	if (ret < 0) {
+		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
+		return ret;
+	}
+
+	pinfo->panel.prepare_prev_first = true;
+
+	pinfo->panel.backlight = icna35xx_create_backlight(dsi);
+	if (IS_ERR(pinfo->panel.backlight))
+		return dev_err_probe(dev, PTR_ERR(pinfo->panel.backlight),
+				     "Failed to create backlight\n");
+
+	drm_panel_add(&pinfo->panel);
+
+	pinfo->dsi->lanes = pinfo->desc->lanes;
+	pinfo->dsi->format = pinfo->desc->format;
+	pinfo->dsi->mode_flags = pinfo->desc->mode_flags;
+	pinfo->dsi->dsc = &pinfo->desc->dsc;
+
+	ret = mipi_dsi_attach(pinfo->dsi);
+	if (ret < 0) {
+		dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+		drm_panel_remove(&pinfo->panel);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id icna35xx_of_match[] = {
+	{ .compatible = "ayntec,odin2portal-panel", .data = &odin2portal_desc },
+	{ .compatible = "ayntec,odin3-panel", .data = &thor_top_desc },
+	{ .compatible = "ayntec,thor-panel-top", .data = &thor_top_desc },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, icna35xx_of_match);
+
+static struct mipi_dsi_driver icna35xx_driver = {
+	.probe = icna35xx_probe,
+	.remove = icna35xx_remove,
+	.driver = {
+		.name = "panel-chipone-icna35xx",
+		.of_match_table = icna35xx_of_match,
+	},
+};
+module_mipi_dsi_driver(icna35xx_driver);
+
+MODULE_AUTHOR("Teguh Sobirin <teguh@sobir.in>");
+MODULE_DESCRIPTION("DRM driver for Chipone ICNA35XX based MIPI DSI panels");
+MODULE_LICENSE("GPL");

-- 
2.53.0