[PATCH 0/6] drm: tackle byteorder issues, take two

[Daniel Stone]

Hi,

On 24 April 2017 at 15:26, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
> On Mon, Apr 24, 2017 at 04:54:25PM +0900, Michel Dänzer wrote:
>> On 24/04/17 04:36 PM, Gerd Hoffmann wrote:
>> > When running in opengl mode there will be a hardware-specific mesa
>> > driver in userspace, which will either know what the gpu view is (for
>> > example because there is only one way to implement this in hardware) or
>> > it can use hardware-specific ioctls to ask the kernel driver what the
>> > gpu view is.
>>
>> Not sure this can be hidden in the OpenGL driver. How would e.g. a
>> Wayland compositor or the Xorg modesetting driver know which OpenGL
>> format corresponds to a given DRM_FORMAT?
>
> How are GL formats defined? /me needs to go read the spec again.

They aren't, per se. Only relative to 'native formats', which for this
discussion is the set of GBM formats, which is in turn just
drm_fourcc.h.

Cheers,
Daniel