summaryrefslogtreecommitdiffstats
path: root/drivers/md/dm-uevent.c
diff options
context:
space:
mode:
authorVille Syrjälä <ville.syrjala@linux.intel.com>2014-03-11 12:58:45 +0200
committerJani Nikula <jani.nikula@intel.com>2014-03-12 17:13:13 +0200
commitfcb818231f81e22b2c3a76d7ef416237fa0c7609 (patch)
tree7a26cd6eead3abcf9e0b17bf2bddf8992ed64ae4 /drivers/md/dm-uevent.c
parent24bd9bf54d45d28089251cdf62bf14323d1aa827 (diff)
downloadblackbird-op-linux-fcb818231f81e22b2c3a76d7ef416237fa0c7609.tar.gz
blackbird-op-linux-fcb818231f81e22b2c3a76d7ef416237fa0c7609.zip
drm/i915: Add a workaround for HSW scanline counter weirdness
On HSW the scanline counter seems to behave differently depending on the output type. eDP on port A does what you would expect an the normal +1 fixup is sufficient to cover it. But on HDMI outputs we seem to need a +2 fixup. Just assume we always need the +2 fixup and accept the slight inaccuracy on eDP. This fixes a regression introduced in: commit 8072bfa6045a264d3913102a35fab125b06603a2 Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Mon Oct 28 21:22:52 2013 +0200 drm/radeon: Move the early vblank IRQ fixup to radeon_get_crtc_scanoutpos() That commit removed the heuristic that tried to fix up the timestamps for vblank interrupts that fire a bit too early. Since then the vblank timestamp code would treat some vblank interrupts as spurious since the scanline counter would indicate that vblank_start wasn't reached yet. That in turn lead to incorrect vblank event sequence numbers being reported to userspace, which lead to unsteady framerate in applications such as XBMC which uses them for timing purposes. v2: Remember to call ilk_pipe_in_vblank_locked() on HSW too (Mika) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75725 Tested-by: bugzilla1@gmx.com Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/md/dm-uevent.c')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud