linux-kernel - Re: [PATCH 2/4] dt-bindings: display: ssd1307fb: Add entry for SINO WEALTH SH1106

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Date:   Fri, 1 Apr 2022 11:32:33 +0200
From:   Javier Martinez Canillas <javier@...hile0.org>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     Javier Martinez Canillas <javierm@...hat.com>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, devicetree@...r.kernel.org,
        Chen-Yu Tsai <wens@...e.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH 2/4] dt-bindings: display: ssd1307fb: Add entry for SINO
 WEALTH SH1106

Hello Chen-Yu,

Thanks a lot for your patch.

On Wed, Mar 30, 2022 at 9:09 PM Chen-Yu Tsai <wens@...nel.org> wrote:
>
> From: Chen-Yu Tsai <wens@...e.org>
>
> The SINO WEALTH SH1106 is an OLED display driver that is somewhat
> compatible with the SSD1306. It supports a slightly wider display,
> at 132 instead of 128 pixels. The basic commands are the same, but
> the SH1106 doesn't support the horizontal or vertical address modes.
>
> Add a compatible string for it.
>
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>  Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
> index 9baafd0c42dd..1ac016a2d847 100644
> --- a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
> +++ b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
> @@ -13,6 +13,7 @@ maintainers:
>  properties:
>    compatible:
>      enum:
> +      - sinowealth,sh1106-i2c

I like that you didn't include a "fb" suffix for this, the existing
ones are cargo culting from the previous fbdev driver to make existing
DTBs compatible with the DRM driver.

I've been thinking if I should post a patch to compatible strings
without the "fb" and mark the current ones as deprecated...

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

Best regards,
Javier