]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Limit FIFO underrun reports on GMCH platforms
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 17 Jan 2014 09:44:31 +0000 (11:44 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Sat, 25 Jan 2014 20:13:37 +0000 (21:13 +0100)
commit89739e80670d940445f9f6737189b5d9b268c4a2
treee3d0abaa9d2a476655841527922881b87f69dc08
parent6230109ab51ae0fd5048991533c5608a03aac7d0
drm/i915: Limit FIFO underrun reports on GMCH platforms

Currently we print all pipe underruns on GMCH platforms. Hook up the
same logic we use on PCH platforms where we disable the underrun
reporting after the first underrun.

Underruns don't actually generate interrupts themselves on GMCH
platforms, we just can detect them whenever we service other
interrupts. So we don't have any enable bits to worry about. We just
need to remember to clear the underrun status when enabling underrun
reporting.

Note that the underrun handling needs to be moved to the non-locked
pipe_stats[] loop in the interrupt handlers to avoid having to rework
the locking in intel_set_cpu_fifo_underrun_reporting().

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_irq.c
drivers/gpu/drm/i915/intel_display.c