lkml.org 
[lkml]   [2019]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 3/4] drm/komeda: Add drm_ctm_to_coeffs()
    Date
    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>
    ---
    .../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)
    +{
    + 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);

    --
    2.20.1
    \
     
     \ /
      Last update: 2019-10-11 07:48    [W:4.771 / U:0.572 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site