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SubjectRe: [PATCH 11/60] drm/gud: Add support for the nomodeset kernel parameter
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Hello Noralf,

On 12/15/21 22:37, Noralf Trønnes wrote:
>
>
> Den 15.12.2021 01.59, skrev Javier Martinez Canillas:
>> According to disable Documentation/admin-guide/kernel-parameters.txt, this
>> parameter can be used to disable kernel modesetting.
>>
>> DRM drivers will not perform display-mode changes or accelerated rendering
>> and only the systewm system framebuffer will be available if it was set-up.
>>
>> But only a few DRM drivers currently check for nomodeset, make this driver
>> to also support the command line parameter.
>>
>> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
>> ---
>>
>
> I don't understand why this is applicable to USB drivers, there's no way
> the firmware can setup a framebuffer and continue pushing pixels over
> USB when Linux has been given control over the USB bus?
>
> The same argument goes for the SPI drivers in drm/tiny/ as well.
>

That's a very good point. I included these mostly for consistency but if it's
OK for the KMS drivers to just ignore the "nomodeset" parameter, I could drop
all that are not for devices in the PCI or platform buses.

Best regards,
--
Javier Martinez Canillas
Linux Engineering
Red Hat

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