Re: [PATCH RFC 0/6] drm: Add properties to control YCbCr to RGB conversion

["Sharma, Shashank" <shashank.sharma@intel.com>]

Regards

Shashank


On 4/21/2017 3:21 PM, Jyri Sarha wrote:
> The series adds plane specific atomic properties to control YCbCr to
> RGB conversions. My intention was to try to implement the plane
> specific (before DEGAMMA) part of the suggestion in this dri-devel
> post:
I would probably extend this series to have a bigger view. Instead of 
addressing RGB->YCBCR conversion, the actual target here should be 
blending of various framebuffers considering:
- their color spaces (Rec 601/709/2020)
- their format (YCBCR->RGB or RGB->YCBCR)
- their linear state (Linear/Non-linear) or if they are ready for Gamut 
mapping/color conversion or not.

Also, we need to have the sequence of properties, so that, it would 
match all(most of the) HWs.
I will add my comments in the upcoming patches accordingly.

- Shashank
> https://lists.freedesktop.org/archives/dri-devel/2017-March/135870.html
>
> This series may not be ready as such. At least the kernel doc parts
> should be more detailed and carefully written. The purpose is merely
> to move the discussion to a more concrete level.
>
> The series also includes drm/omap patches that implement the standard
> properties for OMAP DSS in omapdrm driver.
>
> Best regards,
> Jyri
>
> Jyri Sarha (4):
>    drm: drm_color_mgmt.h needs struct drm_crtc declaration
>    drm: Make drm_atomic_replace_property_blob_from_id() more generic
>    drm: Plane YCbCr to RGB conversion related properties
>    drm/omap: Enable ycbcr_to_rgb_properties for omapdrm planes REVISIT
>
> Tomi Valkeinen (2):
>    drm/omap: cleanup color space conversion
>    drm/omap: csc full range support
>
>   drivers/gpu/drm/drm_atomic.c          |  36 +++++++--
>   drivers/gpu/drm/drm_atomic_helper.c   |   9 +++
>   drivers/gpu/drm/drm_color_mgmt.c      | 136 +++++++++++++++++++++++++++++++-
>   drivers/gpu/drm/drm_plane.c           |  10 +++
>   drivers/gpu/drm/omapdrm/dss/dispc.c   | 141 +++++++++++++++++++++++++++++-----
>   drivers/gpu/drm/omapdrm/dss/omapdss.h |  14 ++++
>   drivers/gpu/drm/omapdrm/omap_plane.c  |  41 ++++++++++
>   include/drm/drm_color_mgmt.h          |  25 ++++++
>   include/drm/drm_plane.h               |  10 +++
>   include/uapi/drm/drm_mode.h           |  12 +++
>   10 files changed, 408 insertions(+), 26 deletions(-)
>

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