forked from Minki/linux
0519c102f5
Apparently SKL/KBL/CFL need some manual help to get the programmed HDMI vswing to stick. Implement the relevant workaround (display w/a #1143). Note that the relevant chicken bits live in a transcoder register even though the bits affect a specific DDI port rather than a specific transcoder. Hence we must pick the correct transcoder register instance based on the port rather than based on the cpu_transcoder. Also note that for completeness I included support for DDI A/E in the code even though we never have HDMI on those ports. v2: CFL needs the w/a as well (Rodrigo and Art) Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Art Runyan <arthur.j.runyan@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180122174131.28046-1-ville.syrjala@linux.intel.com Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> |
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