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ea80a661fe
My ILK seems to generate a spurious PCH underrun with most interlaced HDMI modes. Add a second vblank wait to avoid it. We have seen some spurious PCH underruns still in CI as well, some of which seem to be progressive DP. The logs also point towards some spurious underrins with progressive HDMI on SNB. While I don't have a solid explanation for those let's try to kill all the birds with one stone and always do the double wait. Buzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106387 Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180524190406.2973-1-ville.syrjala@linux.intel.com Acked-by: Chris Wilson <chris@chris-wilson.co.uk> |
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