[Nouveau] [PATCH] display: allow up to 16k width/height for fermi+

[Ben Skeggs]

On 19 September 2015 at 03:24, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Fri, Sep 18, 2015 at 9:41 AM, Ben Skeggs <skeggsb at gmail.com> wrote:
>> On 18 September 2015 at 12:31, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
>>> ---
>>>
>>> mrnuke on IRC reported that 3x 4K monitors (11520 width total) got
>>> rejected for some reason. I'm guessing it's this since a single giant
>>> FB has to be used.
>>>
>>> Not sure if the hardware will actually support it, but... who knows.
>> After looking at the EVO headers, I believe this should be fine.  Did
>> the patch get tested to confirm?
>
> Not yet. Although in the meanwhile I realized that I don't actually
> need 3x 4K monitors... I can just run this patch and do something like
> xrandr --fb 16384x16384. But unfortunately there's no monitor
> connected in my setup where I can reload nouveau easily, and I reboot
> rarely where I do have monitors connected.
Doh!  True :)

>
>>
>> I'd also make the subject "kms" rather than "display".
>>
>> Ben.
>>
>>>
>>>  drm/nouveau/nouveau_display.c | 6 +++++-
>>>  1 file changed, 5 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drm/nouveau/nouveau_display.c b/drm/nouveau/nouveau_display.c
>>> index 8d0e60d..d3d6438 100644
>>> --- a/drm/nouveau/nouveau_display.c
>>> +++ b/drm/nouveau/nouveau_display.c
>>> @@ -469,9 +469,13 @@ nouveau_display_create(struct drm_device *dev)
>>>         if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) {
>>>                 dev->mode_config.max_width = 4096;
>>>                 dev->mode_config.max_height = 4096;
>>> -       } else {
>>> +       } else
>>> +       if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI) {
>>>                 dev->mode_config.max_width = 8192;
>>>                 dev->mode_config.max_height = 8192;
>>> +       } else {
>>> +               dev->mode_config.max_width = 16384;
>>> +               dev->mode_config.max_height = 16384;
>>>         }
>>>
>>>         dev->mode_config.preferred_depth = 24;
>>> --
>>> 2.4.6
>>>
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