linux-kernel - Re: [PATCH] drm/panel: Add panel-edp: add lcd innolux,n140hca-eac

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Date:   Fri, 18 Feb 2022 17:01:17 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Rex Nie <rexnie3@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, thierry.reding@...il.com,
        sam@...nborg.org, airlied@...ux.ie, daniel@...ll.ch,
        robh+dt@...nel.org, spanda@...eaurora.org, dianders@...omium.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/panel: Add panel-edp: add lcd innolux,n140hca-eac

On Fri, Feb 18, 2022 at 2:36 PM Rex Nie <rexnie3@...il.com> wrote:
>
> innolux,n140hca-eac is a eDP-based LCD panel. This panel has 1920x1080
> resolution in 14-inch TFT panel.
>
> Signed-off-by: Rex Nie <rexnie3@...il.com>
> ---
>  .../display/panel/innolux,n140hca-eac.yaml    | 43 +++++++++++++++++++
>  drivers/gpu/drm/panel/panel-edp.c             | 26 +++++++++++
>  2 files changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/innolux,n140hca-eac.yaml
>
Hi Rex,

Please split yaml and driver into different patches.
You don't need to create a new binding for innolux,n140hca-eac.yaml.
You can add the compatible into panel-simple.yaml. Check
innolux,n125hce-gn1 for example.

> diff --git a/Documentation/devicetree/bindings/display/panel/innolux,n140hca-eac.yaml b/Documentation/devicetree/bindings/display/panel/innolux,n140hca-eac.yaml
> new file mode 100644
> index 000000000000..5493e383c97c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/innolux,n140hca-eac.yaml
> @@ -0,0 +1,43 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/innolux,n140hca-eac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Innolux N140HCA-EAC 14 inch eDP 1080p display panel
> +
> +maintainers:
> +  - Sandeep Panda <spanda@...eaurora.org>
> +  - Douglas Anderson <dianders@...omium.org>
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    const: innolux,n140hca-eac
> +
> +  enable-gpios: true
> +  power-supply: true
> +  backlight: true
> +  no-hpd: true
> +
> +required:
> +  - compatible
> +  - power-supply
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    panel_edp: panel-edp {
> +        compatible = "innolux,n140hca-eac";
> +        enable-gpios = <&pio 96 GPIO_ACTIVE_HIGH>;
> +        power-supply = <&pp3300_disp_x>;
> +        backlight = <&backlight_lcd0>;
> +        no-hpd;
> +    };
> +
> +...
> diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
> index f7bfcf63d48e..f5f9c9cb26ba 100644
> --- a/drivers/gpu/drm/panel/panel-edp.c
> +++ b/drivers/gpu/drm/panel/panel-edp.c
> @@ -1330,6 +1330,29 @@ static const struct panel_desc innolux_n125hce_gn1 = {
>         },
>  };
>
> +static const struct display_timing innolux_n140hca_eac_timing = {
> +       .pixelclock = { 72600000, 76420000, 80240000 },
> +       .hactive = { 1920, 1920, 1920 },
> +       .hfront_porch = { 80, 80, 80 },
> +       .hback_porch = { 190, 190, 190 },
> +       .hsync_len = { 60, 60, 60 },
> +       .vactive = { 1080, 1080, 1080 },
> +       .vfront_porch = { 6, 6, 6 },
> +       .vback_porch = { 38, 38, 38 },
> +       .vsync_len = { 8, 8, 8 },
> +       .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW,
> +};
> +
> +static const struct panel_desc innolux_n140hca_eac = {
> +       .timings = &innolux_n140hca_eac_timing,
> +       .num_timings = 1,
> +       .bpc = 6,
> +       .size = {
> +               .width = 309,
> +               .height = 174,
> +       },
> +};
> +
>  static const struct drm_display_mode innolux_p120zdg_bf1_mode = {
>         .clock = 206016,
>         .hdisplay = 2160,
> @@ -1750,6 +1773,9 @@ static const struct of_device_id platform_of_match[] = {
>         }, {
>                 .compatible = "innolux,n125hce-gn1",
>                 .data = &innolux_n125hce_gn1,
> +       }, {
> +               .compatible = "innolux,n140hca-eac",
> +               .data = &innolux_n140hca_eac,
>         }, {
>                 .compatible = "innolux,p120zdg-bf1",
>                 .data = &innolux_p120zdg_bf1,
> --
> 2.25.1
>