[PATCH v4 0/2] drm/panel: Add panel driver for Chipone ICNA35XX based panels

[PATCH v4 0/2] drm/panel: Add panel driver for Chipone ICNA35XX based panels

[Aaron Kling via B4 Relay]

This driver is based on the one by Teguh Sobirin [0].
    
Due to [1], the AYN vendor description patch has been folded into the
AYN QCS8550 dt series. Which means this series depends on said series
and it must be picked up before this.

[0] https://github.com/AYNTechnologies/linux/commit/4c5e76e974db7cca853619ca138eecd8f004622f
[1] https://lore.kernel.org/linux-arm-msm/c7fb3f89-6574-4761-9ef2-2fdf6d4801b5@kernel.org

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
Changes in v4:
- Drop all but one mode per variant, to avoid manual lookup of requested
  refresh rate
- Use more devm, eliminating the need for a remove function
- Don't lose lpm mode in brightness handling if an error happens
- Link to v3: https://lore.kernel.org/r/20260514-icna35xx-v3-0-c304f04c32c4@gmail.com

Changes in v3:
- Rename binding in patch 1 to icna3512 to match a compatible being used
- Edit commit messages in both patches 1 and 2 to better clarify the
  supported hardware and differences
- Link to v2: https://lore.kernel.org/r/20260514-icna35xx-v2-0-45acd1dfa566@gmail.com

Changes in v2:
- Fix lint warning in patch 1
- Add ayaneo,pocketds-panel-top compatible to patches 1 and 2, it uses the
  same init sequence as the odin 2 portal panel.
- Link to v1: https://lore.kernel.org/r/20260509-icna35xx-v1-0-688d3d4e10f9@gmail.com

---
Aaron Kling (1):
      dt-bindings: display: panel: Add Chipone ICNA3512 OLED driver bindings

Teguh Sobirin (1):
      drm/panel: Add panel driver for Chipone ICNA35XX based panels

 .../bindings/display/panel/chipone,icna3512.yaml   |  79 ++++
 drivers/gpu/drm/panel/Kconfig                      |  11 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-chipone-icna35xx.c     | 422 +++++++++++++++++++++
 4 files changed, 513 insertions(+)
---
base-commit: 6e845bcb78c95af935094040bd4edc3c2b6dd784
change-id: 20260220-icna35xx-ec9afa13e1aa
prerequisite-change-id: 20260217-ayn-qcs8550-16c07b63de26:v8
prerequisite-patch-id: 2b010637c46f5ea0e19a2fa87cc5ccb19bfd9204
prerequisite-patch-id: d0c633dc17f0aba726a8e8d21fee52b944bf67ff
prerequisite-patch-id: 11f4208bd788df984cec7404088c7d071ec49dfc
prerequisite-patch-id: 76b61799dba520fc7fa3ff39b044e24103337af3
prerequisite-patch-id: 3844bef2eda3cf59031b1d131eb6ba9295629bb4
prerequisite-patch-id: 3331648bc6f4ac3bb156f0525aa1ede92bfc57f1

Best regards,
-- 
Aaron Kling <webgeek1234@gmail.com>

[PATCH v4 1/2] dt-bindings: display: panel: Add Chipone ICNA3512 OLED driver bindings

[Aaron Kling via B4 Relay]

From: Aaron Kling <webgeek1234@gmail.com>

The Chipone ICNA3512 and ICNA3520 DDICs are high refresh, low power
MIPI-DSI drivers for OLED panels. The icna3512 is used by the Ayn Odin 2
Portal and the Ayaneo Pocket DS top panel while the icna3520 is used by
the Ayn Thor top panel and the Ayn Odin 3.

These ddic's are generally compatible, but some MIPI vendor commands
differ between them, so they are not fully fallback compatible.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
 .../bindings/display/panel/chipone,icna3512.yaml   | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml b/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml
new file mode 100644
index 00000000000000..90e69f30cd91ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/chipone,icna3512.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Chipone ICNA3512 and ICNA3520 display drivers
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+
+description:
+  The Chipone ICNA3512 and ICNA3520 are DDICs connected
+  using a MIPI-DSI video interface.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - ayaneo,pocketds-panel-top
+              - ayntec,odin2portal-panel
+          - const: chipone,icna3512
+
+      - items:
+          - enum:
+              - ayntec,odin3-panel
+              - ayntec,thor-panel-top
+          - const: chipone,icna3520
+
+  reg:
+    maxItems: 1
+    description: DSI virtual channel
+
+  vdd-supply: true
+  vddio-supply: true
+  vci-supply: true
+  disp-supply: true
+  blvdd-supply: true
+
+  port: true
+  reset-gpios: true
+  rotation: true
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+  - vddio-supply
+  - vci-supply
+  - disp-supply
+  - blvdd-supply
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "ayntec,odin2portal-panel", "chipone,icna3512";
+            reg = <0>;
+            vdd-supply = <&vreg_l11b_1p2>;
+            vddio-supply = <&vreg_l12b_1p8>;
+            vci-supply = <&vreg_l13b_3p0>;
+            disp-supply = <&vdd_disp_2v8>;
+            blvdd-supply = <&vdd_bl_5v0>;
+            reset-gpios = <&tlmm 133 GPIO_ACTIVE_LOW>;
+        };
+    };
+
+...

-- 
2.53.0

[PATCH v4 2/2] drm/panel: Add panel driver for Chipone ICNA35XX based panels

[Aaron Kling via B4 Relay]

From: Teguh Sobirin <teguh@sobir.in>

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

These all have unique compatibles because the panels themselves are
likely unique hardware with only the ddic's and thus api and driver
handling shared.

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 | 422 +++++++++++++++++++++++++
 3 files changed, 434 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..86d096455caa1c
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-chipone-icna35xx.c
@@ -0,0 +1,422 @@
+// 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>
+#include <drm/drm_probe_helper.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 icna3512_init_sequence(struct panel_info *pinfo)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = pinfo->dsi };
+	struct drm_dsc_picture_parameter_set pps;
+
+	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);
+
+	/* 165 hz */
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x48, 0x20);
+
+	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;
+
+	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);
+
+	/* 120 hz */
+	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);
+
+	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,
+	}
+};
+
+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,
+	}
+};
+
+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 int icna35xx_get_modes(struct drm_panel *panel,
+			       struct drm_connector *connector)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+
+	return drm_connector_helper_get_modes_fixed(connector, pinfo->desc->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);
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return ret;
+}
+
+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);
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return ret < 0 ? ret : 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");
+
+	ret = devm_drm_panel_add(dev, &pinfo->panel);
+	if (ret)
+		return ret;
+
+	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;
+
+	return devm_mipi_dsi_attach(dev, dsi);
+}
+
+static const struct of_device_id icna35xx_of_match[] = {
+	{ .compatible = "ayaneo,pocketds-panel-top", .data = &odin2portal_desc },
+	{ .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,
+	.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

Re: [PATCH v4 1/2] dt-bindings: display: panel: Add Chipone ICNA3512 OLED driver bindings

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] The vendor prefix 'ayntec' is used in compatible strings but is not documented in vendor-prefixes.yaml, which will cause dt_binding_check to fail.
--

commit 5d6611d7262ab82a8a3721761623b1f394d6e2ec
Author: Aaron Kling <webgeek1234@gmail.com>

dt-bindings: display: panel: Add Chipone ICNA3512 OLED driver bindings

This commit adds device tree bindings for the Chipone ICNA3512 and ICNA3520
MIPI-DSI OLED panel drivers.

> diff --git a/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml b/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml
> new file mode 100644
> index 0000000000000..90e69f30cd91c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/chipone,icna3512.yaml

[ ... ]

> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - ayaneo,pocketds-panel-top
> +              - ayntec,odin2portal-panel

[Severity: Low]
Does this new vendor prefix need to be added to vendor-prefixes.yaml?

Device tree schema validation verifies all compatible strings against the
known list of vendor prefixes. Since 'ayntec' isn't currently documented
there, will this cause dt_binding_check to report errors when validating
this schema?

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260607-icna35xx-v4-0-64de514add34@gmail.com?part=1

Re: [PATCH v4 2/2] drm/panel: Add panel driver for Chipone ICNA35XX based panels

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 5 potential issue(s) to consider:
- [High] Hardware back-powering due to incorrect reset GPIO initialization and error handling.
- [High] Backlight sysfs callbacks send MIPI DCS commands to an unpowered panel.
- [High] Data race on `dsi->mode_flags` corrupts hardware state configuration.
- [Medium] Shared static data mutation in DSI DSC configuration.
- [Low] Missing Kconfig Dependency for DRM_DISPLAY_DSC_HELPER causes a build failure.
--

commit cb6f31a048e6cc4b007cabd737760b76820c7eb7
Author: Teguh Sobirin <teguh@sobir.in>

drm/panel: Add panel driver for Chipone ICNA35XX based panels

This commit adds support for the ICNA3512 and ICNA3520 display controllers
used in the AYN Odin 2 Portal, Ayaneo Pocket DS, AYN Odin 3, and Thor top
panels. It introduces unique compatibles for each panel while sharing the
common DDIC driver handling.

> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 7450b27622a23..1368b5a0b6c91 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

[Severity: Low]
Will this cause a build failure if DRM_DISPLAY_DSC_HELPER isn't enabled
elsewhere?

The panel driver unconditionally calls drm_dsc_pps_payload_pack() in its
initialization sequence, such as in icna3512_init_sequence().

Without explicitly selecting the DSC helper here, building the kernel with
this panel driver could result in an undefined reference linker error.
Should we add a select for DRM_DISPLAY_DSC_HELPER?

> diff --git a/drivers/gpu/drm/panel/panel-chipone-icna35xx.c b/drivers/gpu/drm/panel/panel-chipone-icna35xx.c
> new file mode 100644
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-chipone-icna35xx.c
[ ... ]
> +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);

[Severity: High]
Does this error path need to assert the reset GPIO before disabling the
regulators?

If the initialization sequence fails, the regulators are turned off while the
reset GPIO remains deasserted. Leaving the unpowered panel driven by the GPIO
signal could cause hardware back-powering issues.

[ ... ]
> +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;

[Severity: High]
Can this non-atomic modification to dsi->mode_flags race with the backlight
sysfs callbacks?

Since icna35xx_bl_update_status() also dynamically toggles MIPI_DSI_MODE_LPM
using non-atomic bitwise operations, a data race could occur if backlight
sysfs callbacks execute concurrently with DRM atomic modeset operations.

Could this silently corrupt the DSI host configuration by leaving the mode
flags in the wrong state? Is locking needed to serialize access to these
flags?

[ ... ]
> +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);

[Severity: High]
Could this dispatch MIPI DCS commands to an unpowered panel?

Because the backlight device is registered manually, it remains accessible to
userspace even when the panel is unprepared and suspended. If userspace
writes to the sysfs brightness attribute at that time, it might trigger bus
timeouts or host controller crashes.

Should this callback, along with icna35xx_bl_get_brightness(), verify the
panel's power state before sending DCS transactions?

[ ... ]
> +static int icna35xx_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct device *dev = &dsi->dev;
> +	struct panel_info *pinfo;
> +	int ret;
[ ... ]
> +	pinfo->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);

[Severity: High]
Could requesting this GPIO with GPIOD_OUT_LOW cause back-powering during
probe?

For a typical active-low reset pin, this logically deasserts it, potentially
driving a high voltage into the panel IC immediately during probe while its
regulators are still turned off.

Should it be initialized to a safe asserted state like GPIOD_OUT_HIGH
instead?

[ ... ]
> +	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;

[Severity: Medium]
Since DSI host drivers dynamically compute and write DSC parameters into
dsi->dsc, will assigning this to the statically allocated pinfo->desc->dsc
mutate global data?

This could lead to state leakage across driver unbind and rebind cycles, or
cause race conditions if multiple panels of the same type are instantiated.
Should the driver allocate a per-instance struct drm_dsc_config instead?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260607-icna35xx-v4-0-64de514add34@gmail.com?part=2