[PATCH 0/4] DRM helpers for Display Stream Compression PPS infoframes

Daniel Vetter daniel at ffwll.ch
Mon May 14 16:50:28 UTC 2018


On Wed, May 09, 2018 at 02:58:23PM -0700, Manasi Navare wrote:
> VESA Display Stream Compression is a specification for visually losless
> video compression over display links. The DSC standard also defines
> a picture parameter set (PPS) which encoder must communicate to decoders.
> This is done by encapsulating PPS header and payload bytes in an infoframe
> that can be sent to the display sink using secondary data packets
> as defined in DP 1.4 spec.
> 
> This patch series creates a new files drm_dsc.h and drm_dsc.c
> which define all the DSC related structures and helpers that
> can be called by drivers to form DSC PPS infoframes before
> enabling Display Stream compression on eDP/DP/MIPI

Just an aside: At least here the threading for this patch series seems
off. And patchwork also didn't pick up your cover letter:

https://patchwork.freedesktop.org/series/42969/

> 
> These files can be used to add more DSC spec related helpers
> common to all drivers.
> 
> Gaurav K Singh (1):
>   drm/dsc: Define VESA Display Stream Compression Capabilities
> 
> Manasi Navare (3):
>   drm/dp: Define payload size for DP SDP PPS packet
>   drm/dsc: Define Display Stream Compression PPS infoframe
>   drm/dsc: Add helpers for DSC picture parameter set infoframes
> 
>  drivers/gpu/drm/Makefile    |   2 +-
>  drivers/gpu/drm/drm_dsc.c   | 222 ++++++++++++++++++
>  include/drm/drm_dp_helper.h |   1 +
>  include/drm/drm_dsc.h       | 539 ++++++++++++++++++++++++++++++++++++++++++++

Please include these new files into the overall kernel-doc structure (and
make sure stuff is sufficiently documented).

Thanks, Daniel

>  4 files changed, 763 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/drm/drm_dsc.c
>  create mode 100644 include/drm/drm_dsc.h
> 
> -- 
> 2.7.4
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch


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