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    • Mario Kleiner's avatar
      drm/amd/display: Fix HDMI deep color output for DCE 6-11. · efa18405
      Mario Kleiner authored
      This fixes corrupted display output in HDMI deep color
      10/12 bpc mode at least as observed on AMD Mullins, DCE-8.3.
      
      It will hopefully also provide fixes for other DCE's up to
      DCE-11, assuming those will need similar fixes, but i could
      not test that for HDMI due to lack of suitable hw, so viewer
      discretion is advised.
      
      dce110_stream_encoder_hdmi_set_stream_attribute() is used for
      HDMI setup on all DCE's and is missing color_depth assignment.
      
      dce110_program_pix_clk() is used for pixel clock setup on HDMI
      for DCE 6-11, and is missing color_depth assignment.
      
      Additionally some of the underlying Atombios specific encoder
      and pixelclock setup functions are missing code which is in
      the classic amdgpu kms modesetting path and the in the radeon
      kms driver for DCE6/DCE8.
      
      encoder_control_digx_v3() - Was missing setup code wrt. amdgpu
      and radeon kms classic drivers. Added here, but untested due to
      lack of suitable test hw.
      
      encoder_control_digx_v4() - Added missing setup code.
      Successfully tested on AMD mullins / DCE-8.3 with HDMI deep color
      output at 10 bpc and 12 bpc.
      
      Note that encoder_control_digx_v5() has proper setup code in place
      and is used, e.g., by DCE-11.2, but this code wasn't used for deep
      color setup due to the missing cntl.color_depth setup in the calling
      function for HDMI.
      
      set_pixel_clock_v5() - Missing setup code wrt. classic amdgpu/radeon
      kms. Added here, but untested due to lack of hw.
      
      set_pixel_clock_v6() - Missing setup code added. Successfully tested
      on AMD mullins DCE-8.3. This fixes corrupted display output at HDMI
      deep color output with 10 bpc or 12 bpc.
      
      Fixes: 4562236b ("drm/amd/dc: Add dc display driver (v2)")
      Reviewed-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
      Signed-off-by: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
      Cc: Harry Wentland <harry.wentland@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      efa18405