• Gwan-gyeong Mun's avatar
    drm/i915/dp: Add support of BT.2020 Colorimetry to DP MSA · 0c06fa15
    Gwan-gyeong Mun authored
    When BT.2020 Colorimetry output is used for DP, we should program BT.2020
    Colorimetry to MSA and VSC SDP. In order to handle colorspace of
    drm_connector_state, it moves a calling of intel_ddi_set_pipe_settings()
    function into intel_ddi_pre_enable_dp(). And it also rename
    intel_ddi_set_pipe_settings() to intel_ddi_set_dp_msa().
    
    As per DP 1.4a spec section 2.2.4 [MSA Data Transport]
    The MSA data that the DP Source device transports for reproducing the main
    video stream. Attribute data is sent once per frame during the main video
    stream’s vertical blanking period.
    
    In order to distinguish needed colorimetry for VSC SDP, it adds
    intel_dp_needs_vsc_sdp function.
    If the output colorspace requires vsc sdp or output format is YCbCr 4:2:0,
    it uses MSA with VSC SDP.
    
    As per DP 1.4a spec section 2.2.4.3 [MSA Field for Indication of
    Color Encoding Format and Content Color Gamut] while sending
    BT.2020 Colorimetry signals we should program MSA MISC1 fields which
    indicate VSC SDP for the Pixel Encoding/Colorimetry Format.
    
    v2: Remove useless parentheses
    v3: Addressed review comments from Ville
        - In order to checking output format and output colorspace on
          intel_dp_needs_vsc_sdp(), it passes entire intel_crtc_state struct
          value.
        - Remove a pointless variable.
    v9: Addressed review comments from Ville
        - Remove a duplicated output color space from intel_crtc_state.
        - In order to handle colorspace of drm_connector_state, it moves a
          calling of intel_ddi_set_pipe_settings() function into
          intel_ddi_pre_enable_dp().
    Signed-off-by: default avatarGwan-gyeong Mun <gwan-gyeong.mun@intel.com>
    Reviewed-by: default avatarUma Shankar <uma.shankar@intel.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20190919195311.13972-3-gwan-gyeong.mun@intel.comSigned-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
    0c06fa15
intel_dp.h 4.88 KB