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| author | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2020-12-18 16:07:15 +0530 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2020-12-22 17:52:50 +0200 |
| commit | 07c9b8634fb6c5c3fd4cdf363bdf472a365789d0 (patch) | |
| tree | 8646760fe9a22d4667a24a5c9207ba8634c6db39 /include/drm | |
| parent | e2e16da398d9149ede0162a55f44537582aed2e7 (diff) | |
| download | linux-07c9b8634fb6c5c3fd4cdf363bdf472a365789d0.tar.gz linux-07c9b8634fb6c5c3fd4cdf363bdf472a365789d0.tar.bz2 linux-07c9b8634fb6c5c3fd4cdf363bdf472a365789d0.zip | |
drm/dp_helper: Add helpers to configure PCONs RGB-YCbCr Conversion
DP Specification for DP2.0 to HDMI2.1 Pcon specifies support for conversion
of colorspace from RGB to YCbCr.
https://groups.vesa.org/wg/DP/document/previewpdf/15651
This patch adds the relavant registers and helper functions to
get the capability and set the color conversion bits for rgb->ycbcr
conversion through PCON.
v2: As suggested in review comments:
-Fixed bug in the check condition in a drm_helper as reported by
Dan Carpenter and Kernel test robot. (Dan Carepenter)
-Modified the color-conversion cap helper function, to accommodate
BT709 and BT2020 colorspace. (Uma Shankar)
-Added spec details for the new cap for color conversion. (Uma Shankar)
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-8-ankit.k.nautiyal@intel.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index e909c66b205a..6236f212da61 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -432,6 +432,17 @@ struct drm_device; # define DP_DS_HDMI_YCBCR444_TO_422_CONV (1 << 3) # define DP_DS_HDMI_YCBCR444_TO_420_CONV (1 << 4) +/* + * VESA DP-to-HDMI PCON Specification adds caps for colorspace + * conversion in DFP cap DPCD 83h. Sec6.1 Table-3. + * Based on the available support the source can enable + * color conversion by writing into PROTOCOL_COVERTER_CONTROL_2 + * DPCD 3052h. + */ +# define DP_DS_HDMI_BT601_RGB_YCBCR_CONV (1 << 5) +# define DP_DS_HDMI_BT709_RGB_YCBCR_CONV (1 << 6) +# define DP_DS_HDMI_BT2020_RGB_YCBCR_CONV (1 << 7) + #define DP_MAX_DOWNSTREAM_PORTS 0x10 /* DP Forward error Correction Registers */ @@ -1207,7 +1218,10 @@ struct drm_device; # define DP_PCON_ENC_PPS_OVERRIDE_DISABLED 0 # define DP_PCON_ENC_PPS_OVERRIDE_EN_PARAMS 1 # define DP_PCON_ENC_PPS_OVERRIDE_EN_BUFFER 2 - +# define DP_CONVERSION_RGB_YCBCR_MASK (7 << 4) +# define DP_CONVERSION_BT601_RGB_YCBCR_ENABLE (1 << 4) +# define DP_CONVERSION_BT709_RGB_YCBCR_ENABLE (1 << 5) +# define DP_CONVERSION_BT2020_RGB_YCBCR_ENABLE (1 << 6) /* PCON Downstream HDMI ERROR Status per Lane */ #define DP_PCON_HDMI_ERROR_STATUS_LN0 0x3037 @@ -2167,5 +2181,8 @@ int drm_dp_pcon_dsc_bpp_incr(const u8 pcon_dsc_dpcd[DP_PCON_DSC_ENCODER_CAP_SIZE int drm_dp_pcon_pps_default(struct drm_dp_aux *aux); int drm_dp_pcon_pps_override_buf(struct drm_dp_aux *aux, u8 pps_buf[128]); int drm_dp_pcon_pps_override_param(struct drm_dp_aux *aux, u8 pps_param[6]); +bool drm_dp_downstream_rgb_to_ycbcr_conversion(const u8 dpcd[DP_RECEIVER_CAP_SIZE], + const u8 port_cap[4], u8 color_spc); +int drm_dp_pcon_convert_rgb_to_ycbcr(struct drm_dp_aux *aux, u8 color_spc); #endif /* _DRM_DP_HELPER_H_ */ |