[RFC v3 0/8] Add Plane Color Properties

[Alexandru-Cosmin Gheorghe]

Hi Uma,

Any progress on userspace for this?
I was thinking on working on using this in drm_hwcomposer.

Thank you,
Alex Gheorghe

On Fri, Mar 09, 2018 at 11:47:41PM +0530, Uma Shankar wrote:
> This patch series adds properties for plane color features. It adds
> properties for degamma used to linearize data, CSC used for gamut
> conversion, and gamma used to again non-linearize data as per panel
> supported color space. These can be utilize by user space to convert
> planes from one format to another, one color space to another etc.
> 
> Usersapce can take smart blending decisions and utilize these hardware
> supported plane color features to get accurate color profile. The same
> can help in consistent color quality from source to panel taking
> advantage of advanced color features in hardware.
> 
> These patches just add the property interfaces and enable helper
> functions.
> 
> This series adds Intel Gen9 specific plane gamma feature. We can
> build up and add other platform/hardware specific implementation
> on top of this series
> 
> Note: This is just to get a design feedback whether these interfaces
> look ok. Based on community feedback on interfaces, we will implement
> IGT tests to validate plane color features. This is un-tested currently.
> Also, userspace implementation to use these properties is currently not
> available.
> 
> v2: Dropped legacy gamma table for plane as suggested by Maarten. Added
> Gen9/BDW plane gamma feature and rebase on tot.
> 
> v3: Added a new drm_color_lut_ext structure to accommodate 32 bit precision
> entries, pointed to by Brian, Starkey for HDR usecases. Addressed Sean,Paul
> comments and moved plane color properties to drm_plane instead of
> mode_config. Added property documentation as suggested by Daniel, Vetter.
> Fixed a rebase fumble which occurred in v2, pointed by Emil Velikov.
> 
> Uma Shankar (8):
>   drm: Add Enhanced Gamma LUT precision structure
>   drm: Add Plane Degamma properties
>   drm: Add Plane CTM property
>   drm: Add Plane Gamma properties
>   drm: Define helper function for plane color enabling
>   drm/i915: Enable plane color features
>   drm/i915: Implement Plane Gamma for Bdw and Gen9 platforms
>   drm/i915: Load plane color luts from atomic flip
> 
>  Documentation/gpu/drm-kms.rst             |  18 ++++
>  drivers/gpu/drm/drm_atomic.c              |  30 +++++++
>  drivers/gpu/drm/drm_atomic_helper.c       |  12 +++
>  drivers/gpu/drm/drm_plane.c               | 131 ++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/i915_drv.h           |   5 ++
>  drivers/gpu/drm/i915/i915_pci.c           |   5 +-
>  drivers/gpu/drm/i915/i915_reg.h           |  24 ++++++
>  drivers/gpu/drm/i915/intel_atomic_plane.c |   4 +
>  drivers/gpu/drm/i915/intel_color.c        |  80 ++++++++++++++++++
>  drivers/gpu/drm/i915/intel_device_info.h  |   5 ++
>  drivers/gpu/drm/i915/intel_display.c      |   4 +
>  drivers/gpu/drm/i915/intel_drv.h          |  10 +++
>  drivers/gpu/drm/i915/intel_sprite.c       |   4 +
>  include/drm/drm_color_mgmt.h              |   5 ++
>  include/drm/drm_plane.h                   |  66 +++++++++++++++
>  include/uapi/drm/drm_mode.h               |  15 ++++
>  16 files changed, 417 insertions(+), 1 deletion(-)
> 
> -- 
> 1.9.1
> 
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-- 
Cheers,
Alex G