[PATCH] drm/mgag200: Increase bandwidth for G200se A rev1

[Thomas Zimmermann]

Hi

Am 26.07.23 um 12:11 schrieb Roger Sewell:
> Jocelyn,
> 
>>> How can I check for sure whether I am using 24 or 32 bits per pixel
>>> ?
>>
>> The easiest solution if you already rebuilt your kernel is to print
>> the variable bpp here:
>>
>> https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/mgag200/mgag200_mode.c#L326
>>
>> pr_info("mgag200 bpp %d\n", bpp);
> 
> Did that, and I get "mgag200 bpp 32".
> 
>> Also if you can run Wayland at 1440x900 at 60, that would mean the
>> hardware is indeed able to handle it in 32bit.
> 
> I can indeed run Wayland at 1440x900 at 60.
> 
> So I think I'm right in saying that my graphics chip can handle
> 1440x900 at 60 with 32 bits per pixel.

Of course. You modified that limit, so the pixel rate remains below.

Best regards
Thomas

> 
> However, while searching /var/log/messages for the bpp output above, I
> also found these two lines:
> 
> /usr/libexec/gdm-x-session[2366]: (==) modeset(0): Depth 24, (==) framebuffer bpp 32
> /usr/libexec/gdm-x-session[2366]: (==) modeset(0): RGB weight 888
> 
> in case it makes a difference.
> 
> Thanks,
> Roger.

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
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