linux-kernel - Re: [PATCH] drm/st7735r: Fix module autoloading for Okaya RH128128T

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Date:   Fri, 20 May 2022 10:33:37 -0500
From:   David Lechner <david@...hnology.com>
To:     Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sam Ravnborg <sam@...nborg.org>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/st7735r: Fix module autoloading for Okaya RH128128T

On 5/20/22 4:16 AM, Javier Martinez Canillas wrote:
> The SPI core always reports a "MODALIAS=spi:<foo>", even if the device was
> registered via OF. This means that the st7735r.ko module won't autoload if
> a DT has a node with a compatible "okaya,rh128128t" string.
> 
> In that case, kmod expects a "MODALIAS=of:N*T*Cokaya,rh128128t" uevent but
> instead will get a "MODALIAS=spi:rh128128t", which is not present in the
> list of aliases:
> 
>    $ modinfo drivers/gpu/drm/tiny/st7735r.ko | grep alias
>    alias:          of:N*T*Cokaya,rh128128tC*
>    alias:          of:N*T*Cokaya,rh128128t
>    alias:          of:N*T*Cjianda,jd-t18003-t01C*
>    alias:          of:N*T*Cjianda,jd-t18003-t01
>    alias:          spi:jd-t18003-t01
> 
> To workaround this issue, add in the SPI table an entry for that device.
> 
> Fixes: d1d511d516f7 ("drm: tiny: st7735r: Add support for Okaya RH128128T")
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
> ---

Acked-by: David Lechner <david@...hnology.com>