Commit bb346b66 authored by james qian wang (Arm Technology China)'s avatar james qian wang (Arm Technology China)
Browse files

drm/komeda: Add drm_ctm_to_coeffs() 



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: default avatarjames qian wang (Arm Technology China) <james.qian.wang@arm.com>
Reviewed-by: default avatarMihail Atanassov <mihail.atanassov@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112110927.20931-4-james.qian.wang@arm.com
parent c2b13c65

drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c

+14 −0
Original line number Diff line number Diff line
@@ -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)

{

	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], 3, 12);

}

drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

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