[PATCH 1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[PATCH 1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[Linus Walleij]

This adds device tree bindings for the Samsung LMS397KF04
RGB DPI display panel.

Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../display/panel/samsung,lms397kf04.yaml     | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml b/Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
new file mode 100644
index 000000000000..4cb75a5f2e3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/samsung,lms397kf04.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung LMS397KF04 display panel
+
+description: The datasheet claims this is based around a display controller
+  named DB7430 with a separate backlight controller.
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: samsung,lms397kf04
+
+  reg: true
+
+  reset-gpios: true
+
+  vci-supply:
+    description: regulator that supplies the VCI analog voltage
+      usually around 3.0 V
+
+  vccio-supply:
+    description: regulator that supplies the VCCIO voltage usually
+      around 1.8 V
+
+  backlight: true
+
+  spi-max-frequency:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: inherited as a SPI client node, the datasheet specifies
+      maximum 300 ns minimum cycle which gives around 3 MHz max frequency
+    maximum: 3000000
+
+  port: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      panel@0 {
+        compatible = "samsung,lms397kf04";
+        spi-max-frequency = <3000000>;
+        reg = <0>;
+        vci-supply = <&lcd_3v0_reg>;
+        vccio-supply = <&lcd_1v8_reg>;
+        reset-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+        backlight = <&ktd259>;
+
+        port {
+          panel_in: endpoint {
+            remote-endpoint = <&display_out>;
+          };
+        };
+      };
+    };
+
+...
-- 
2.29.2

Re: [PATCH 1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[Rob Herring]

On Tue, 06 Apr 2021 01:47:12 +0200, Linus Walleij wrote:
> This adds device tree bindings for the Samsung LMS397KF04
> RGB DPI display panel.
> 
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  .../display/panel/samsung,lms397kf04.yaml     | 74 +++++++++++++++++++
>  1 file changed, 74 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH 1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[Linus Walleij]

On Tue, Apr 6, 2021 at 1:47 AM Linus Walleij <linus.walleij@linaro.org> wrote:

> This adds device tree bindings for the Samsung LMS397KF04
> RGB DPI display panel.
>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Someone on DRM misc up to review and/or apply these two
patches?

Doug? I bet you have some patch(es) you can toss back at me to
review in return.

Yours,
Linus Walleij

Re: [1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[Doug Anderson]

Hi,

On Thu, Apr 29, 2021 at 8:39 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> This adds device tree bindings for the Samsung LMS397KF04
> RGB DPI display panel.
>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  .../display/panel/samsung,lms397kf04.yaml     | 74 +++++++++++++++++++
>  1 file changed, 74 insertions(+)

Probably not needed since you have Rob Herring's review, but:

Reviewed-by: Douglas Anderson <dianders@chromium.org>

Re: [PATCH 1/2] drm/panel: Add DT bindings for Samsung LMS397KF04

[Doug Anderson]

Hi,

On Thu, Apr 29, 2021 at 7:34 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> On Tue, Apr 6, 2021 at 1:47 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> > This adds device tree bindings for the Samsung LMS397KF04
> > RGB DPI display panel.
> >
> > Cc: devicetree@vger.kernel.org
> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
>
> Someone on DRM misc up to review and/or apply these two
> patches?
>
> Doug? I bet you have some patch(es) you can toss back at me to
> review in return.

I know next to nothing about MIPI panels, but I gave it my best shot.
Please take my comments with a grain of salt since I'm still a bit
noobie.

I think I already probably owed you a review anyway for previous
reviews you did for me. I do have my big 20-part series out there and
I certainly won't object to more review but most of the patches are
close to having enough review at the moment. For some of the simple
(dare I say "trivial"?) patches Bjorn was nice enough to provide
review. For the panel patches I got an extra review from Sean Paul. I
think there are only one or two patches in the series that have no
review at the moment because I had to spin them for Bjorn's feedback
and he hasn't gotten back to it yet.

-Doug