diff options
| author | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-12 14:10:18 +0300 |
|---|---|---|
| committer | james qian wang (Arm Technology China) <james.qian.wang@arm.com> | 2019-11-14 05:31:27 +0300 |
| commit | bb346b66426fa29eb2d49039b5594bb236a0c87d (patch) | |
| tree | 4cbd503fc4befbab373b6c5f76d463da36c95f46 /drivers/gpu/drm/arm | |
| parent | c2b13c650f8640f493849d2503da6fad637e00eb (diff) | |
| download | linux-bb346b66426fa29eb2d49039b5594bb236a0c87d.tar.xz | |
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) <james.qian.wang@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112110927.20931-4-james.qian.wang@arm.com
Diffstat (limited to 'drivers/gpu/drm/arm')
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h | 1 |
2 files changed, 15 insertions, 0 deletions
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..d8e449e6ebda 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 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); |