From: james qian wang (Arm Technology China) Date: Tue, 12 Nov 2019 11:10:18 +0000 (+0000) Subject: drm/komeda: Add drm_ctm_to_coeffs() X-Git-Tag: v5.10.7~2352^2~6^2~881 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bb346b66426fa29eb2d49039b5594bb236a0c87d;p=platform%2Fkernel%2Flinux-rpi.git 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: james qian wang (Arm Technology China) Reviewed-by: Mihail Atanassov Link: https://patchwork.freedesktop.org/patch/msgid/20191112110927.20931-4-james.qian.wang@arm.com --- 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 c180ce7..d8e449e 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) +{ + 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); +} 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 08ab692..2f46684 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);