drm/i915: Refuse modes with hdisplay==4096 on pre-HSW DP

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The DP port/pipe goes wonky if we try to use timings with
hdisplay==4096 on pre-HSW platforms. The link fails to train
and the pipe may not signal vblank interrupts. On HDMI such at
mode works just fine (tested on ELK/SNB/CHV). So let's refuse
such modes on DP on older platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190718144340.1114-1-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>

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Ville Syrjälä 2019-07-18 17:43:39 +03:00

parent c08f995a28

commit 98c93394ba

1 changed files with 25 additions and 0 deletions

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drivers/gpu/drm/i915/display/intel_dp.c

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