[PATCH v5 0/3] Support 64 bpp half float formats

[Maarten Lankhorst]

Op 13-02-2019 om 16:53 schreef Ville Syrjälä:
> On Fri, Feb 08, 2019 at 01:49:40PM -0800, Kevin Strasser wrote:
>> This series defines new formats and adds implementation to the i915 driver.
>> Since posting v1 I have removed the pixel normalize property, as it's not needed
>> for basic functionality. Also, I have been working on adding support to
>> userspace, but we can't land any patches until drm_fourcc.h has been updated
>> here.
>>
>> I have submitted a series to Mesa to make use of the RGBA ordered formats:
>>   https://patchwork.freedesktop.org/series/54759/
>>
>> My igt branch is reworked to drop usage of pixel normalize and includes use
>> of f16c intrinsics to speed up conversion:
>>   https://gitlab.freedesktop.org/strassek/igt-gpu-tools/commits/fp16
> Was that posted to the ml? I can't seem to find it.
>
> Anyways, a quick look at the web thing tells me this predates
> Maarten's cairo float stuff. I believe that has now landed so you
> should probably switch to using that instead of rendering at 8bpc.

Yes, it's now in upstream igt. :)

RGB96F is just a float[3] = { r, g, b }; RGBA128F is the same with the alpha channel at the end,

should be possible to convert to half float with the right changes to the conversion function.

~Maarten