On Tue, May 07, 2019 at 06:32:57PM +0530, Shashank Sharma wrote:
> From: Uma Shankar <uma.shan...@intel.com>
>
> Currently input csc for YCbCR to RGB conversion handles only
> BT601 and Bt709. Extending it to support BT2020 as well.
>
> Signed-off-by: Uma Shankar <uma.shan...@intel.com>
> Signed-off-by: Shashank Sharma <shashank.sha...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_sprite.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c
> b/drivers/gpu/drm/i915/intel_sprite.c
> index 44aaeac1b2ed..2536e757bec2 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -433,6 +433,18 @@ icl_program_input_csc(struct intel_plane *plane,
> 0x9EF8, 0x7800, 0xABF8,
> 0x0, 0x7800, 0x7ED8,
> },
> + /*
> + * BT.2020 full range YCbCr -> full range RGB
> + * The matrix required is :
> + * [1.000, 0.000, 1.474,
> + * 1.000, -0.1645, -0.5713,
> + * 1.000, 1.8814, 0.0000]
> + */
> + [DRM_COLOR_YCBCR_BT2020] = {
> + 0x7BC8, 0x7800, 0x0,
> + 0x8928, 0x7800, 0xAA88,
> + 0x0, 0x7800, 0x7F10,
> + },
> };
>
> /* Matrix for Limited Range to Full Range Conversion */
> @@ -461,6 +473,18 @@ icl_program_input_csc(struct intel_plane *plane,
> 0x8888, 0x7918, 0xADA8,
> 0x0, 0x7918, 0x6870,
> },
> + /*
> + * BT.2020 Limited range YCbCr -> full range RGB
> + * The matrix required is :
> + * [1.164, 0.000, 1.717,
> + * 1.138, -0.1873, -0.6504,
> + * 1.1380, 2.1417, 0.0000]
Where are those 1.138 coming from?
> + */
> + [DRM_COLOR_YCBCR_BT2020] = {
> + 0x7DC0, 0x7950, 0x0,
> + 0x8A68, 0x7918, 0xAC00,
> + 0x0, 0x7918, 0x6890,
> + },
> };
> const u16 *csc;
>
> --
> 2.17.1
>
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> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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