On Friday, 11 October 2019 06:45:42 BST james qian wang (Arm Technology China)
wrote:
> This function is for converting drm_color_ctm matrix to komeda hardware
> required required Q2.12 2's complement CSC matrix.
>
> v2:
> Move the fixpoint conversion function s31_32_to_q2_12() to drm core
> as a shared helper.
>
> Signed-off-by: james qian wang (Arm Technology China)
> <james.qian.w...@arm.com>
> ---
> .../gpu/drm/arm/display/komeda/komeda_color_mgmt.c | 14 ++++++++++++++
> .../gpu/drm/arm/display/komeda/komeda_color_mgmt.h | 1 +
> 2 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
> index c180ce70c26c..ad668accbdf4 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
> @@ -117,3 +117,17 @@ void drm_lut_to_fgamma_coeffs(struct drm_property_blob
> *lut_blob, u32 *coeffs)
> {
> drm_lut_to_coeffs(lut_blob, coeffs, sector_tbl, ARRAY_SIZE(sector_tbl));
> }
> +
> +void drm_ctm_to_coeffs(struct drm_property_blob *ctm_blob, u32 *coeffs)
[nit] Could do with an extra const or two on the drm_property_blob,
otherwise...
> +{
> + struct drm_color_ctm *ctm;
> + u32 i;
> +
> + if (!ctm_blob)
> + return;
> +
> + ctm = ctm_blob->data;
> +
> + for (i = 0; i < KOMEDA_N_CTM_COEFFS; i++)
> + coeffs[i] = drm_color_ctm_s31_32_to_qm_n(ctm->matrix[i], 2, 12);
> +}
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
> b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
> index 08ab69281648..2f4668466112 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
> @@ -18,6 +18,7 @@
> #define KOMEDA_N_CTM_COEFFS 9
>
> void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32
> *coeffs);
> +void drm_ctm_to_coeffs(struct drm_property_blob *ctm_blob, u32 *coeffs);
>
> const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range);
>
>
...
Reviewed-by: Mihail Atanassov <mihail.atanas...@arm.com>
--
Mihail
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