drm/panel: Add driver for the AUO A030JTN01 TFT LCD

Add driver for the AUO A030JTN01 panel, which is a 320x480 3.0" 4:3 24-bit TFT LCD panel with non-square pixels and a delta-RGB 8-bit interface.

---
 drivers/gpu/drm/panel/Kconfig               |   8 +
 drivers/gpu/drm/panel/Makefile              |   1 +
 drivers/gpu/drm/panel/panel-auo-a030jtn01.c | 295 ++++++++++++++++++++
 3 files changed, 304 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-auo-a030jtn01.c

index a582ddd583c2..3db85c68d182 100644
@@ -8,6 +8,14 @@ config DRM_PANEL
 menu "Display Panels"
 	depends on DRM && DRM_PANEL
 
+config DRM_PANEL_AUO_A030JTN01
+	tristate "AUO A030JTN01"
+	depends on OF && SPI
+	select REGMAP_SPI
+	help
+	  Say Y here to enable support for the AUO A030JTN01 320x480 3.0" panel
+	  as found in the YLM RS-97 handheld gaming console.
+
 config DRM_PANEL_ABT_Y030XX067A
 	tristate "ABT Y030XX067A 320x480 LCD panel"
 	depends on OF && SPI

index 34e717382dbb..f425599c2717 100644
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_DRM_PANEL_AUO_A030JTN01) += panel-auo-a030jtn01.o
 obj-$(CONFIG_DRM_PANEL_ABT_Y030XX067A) += panel-abt-y030xx067a.o
 obj-$(CONFIG_DRM_PANEL_ARM_VERSATILE) += panel-arm-versatile.o
 obj-$(CONFIG_DRM_PANEL_ASUS_Z00T_TM5P5_NT35596) += panel-asus-z00t-tm5p5-n35596.o

2.35.1

Add binding for the AUO A030JTN01 panel, which is a 320x480 3.0" 4:3 24-bit TFT LCD panel with non-square pixels and a delta-RGB 8-bit interface.

---
 .../bindings/display/panel/auo,a030jtn01.yaml | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/auo,a030jtn01.yaml

new file mode 100644
index 000000000000..fb2aef0061e7
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/auo,a030jtn01.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AUO A030JTN01 3.0" (320x480 pixels) 24-bit TFT LCD panel
+
+description: |
+  The panel must obey the rules for a SPI slave device as specified in
+  spi/spi-controller.yaml
+
+maintainers:
+  - Paul Cercueil <[email protected]>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: auo,a030jtn01
+
+  backlight: true
+  port: true
+  power-supply: true
+  reg: true
+  reset-gpios: true
+
+required:
+  - compatible
+  - reg
+  - power-supply
+  - reset-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    panel@0 {
+      compatible = "auo,a030jtn01";
+      reg = <0>;
+
+      spi-max-frequency = <10000000>;
+
+      reset-gpios = <&gpe 4 GPIO_ACTIVE_LOW>;
+      power-supply = <&lcd_power>;
+
+      backlight = <&backlight>;
+
+      port {
+        panel_input: endpoint {
+          remote-endpoint = <&panel_output>;
+        };
+      };
+    };

2.35.1

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check' on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dts:22.11-21: Warning (reg_format): /example-0/panel@0:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1) Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: Warning (pci_device_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: Warning (pci_device_bus_num): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: Warning (simple_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: Warning (i2c_bus_reg): Failed prerequisite 'reg_format' Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: Warning (spi_bus_reg): Failed prerequisite 'reg_format' /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/panel/auo,a030jtn01.example.dtb: panel@0: Unevaluated properties are not allowed ('spi-max-frequency' was unexpected)
From schema: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/display/panel/auo,a030jtn01.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/[email protected]

The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.

You need a minimal spi bus node in your example.