16 bpc fixed point (RGBA16) framebuffer support for core and AMD.

[Mario Kleiner]

On Mon, Mar 22, 2021 at 4:52 PM Ville Syrjälä
<ville.syrjala at linux.intel.com> wrote:
>
> On Fri, Mar 19, 2021 at 10:03:12PM +0100, Mario Kleiner wrote:
> > Hi,
> >
> > this patch series adds the fourcc's for 16 bit fixed point unorm
> > framebuffers to the core, and then an implementation for AMD gpu's
> > with DisplayCore.
> >
> > This is intended to allow for pageflipping to, and direct scanout of,
> > Vulkan swapchain images in the format VK_FORMAT_R16G16B16A16_UNORM.
> > I have patched AMD's GPUOpen amdvlk OSS driver to enable this format
> > for swapchains, mapping to DRM_FORMAT_XBGR16161616:
> > Link: https://github.com/kleinerm/pal/commit/a25d4802074b13a8d5f7edc96ae45469ecbac3c4
>
> We should also add support for these formats into igt.a Should
> be semi-easy by just adding the suitable float<->uint16
> conversion stuff.
>

Hi Ville,

Could you point me to a specific test case / file that I should look
at for adding this?

thanks,
-mario

> --
> Ville Syrjälä
> Intel