drm/i915: Ignore TMDS clock limit for DP++ when EDID override is set

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4K modes testing by using dummy EDID data has never been working
properly on boxes with DP++ (dual-mode) adaptors. The reason for
this is that those modes got pruned during hdmi mode validation.
intel_hdmi_mode_valid returns CLOCK_HIGH because the pixel clock
reported by the 4k mode is higher than dual port TMDS clock limit.

However 4k injection does work properly on machines that don't have
DP++ adapters because the mode is never validated against the DP++
TMDS clock limit.

v2: Don't detect the DP++ limits when we're testing using overridden
    EDIDs. Make sure to check for the override condition after
    respecting the value of drm_dp_dual_mode_detect (Jani Nikula).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101649
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171215102055.11729-1-abdiel.janulgue@linux.intel.com

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This commit is contained in:

Abdiel Janulgue 2017-12-15 12:20:55 +02:00 • committed by Jani Nikula

parent a4dd90b1cb

commit 3019062905

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/i915/intel_hdmi.c

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