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

["Ville Syrjälä via dri-devel" <dri-devel@lists.freedesktop.org>]

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.

> 
> I also have a libdrm branch with fp16 coverage added to modetest:
>   https://gitlab.freedesktop.org/strassek/drm/commits/fp16
> 
> To serve as a smoke test of the whole stack I have a modified version of
> kmscube:
>   https://gitlab.freedesktop.org/strassek/kmscube/commits/fp16
> 
> Kevin Strasser (3):
>   drm/fourcc: Add 64 bpp half float formats
>   drm/i915: Refactor icl_is_hdr_plane
>   drm/i915/icl: Implement half float formats
> 
>  drivers/gpu/drm/drm_fourcc.c         |  4 ++
>  drivers/gpu/drm/i915/intel_atomic.c  |  3 +-
>  drivers/gpu/drm/i915/intel_display.c | 29 +++++++++++++-
>  drivers/gpu/drm/i915/intel_drv.h     |  7 ++--
>  drivers/gpu/drm/i915/intel_sprite.c  | 73 +++++++++++++++++++++++++++++++-----
>  include/uapi/drm/drm_fourcc.h        | 11 ++++++
>  6 files changed, 112 insertions(+), 15 deletions(-)
> 
> -- 
> 2.7.4

-- 
Ville Syrjälä
Intel
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