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drm/i915: Warn if we run out of FIFO space for a mode

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson 2010-07-19 21:46:08 +01:00 committed by Eric Anholt
parent 8de9b311bc
commit b9421ae8f3
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/i915/intel_display.c
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@ -2745,8 +2745,14 @@ static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
/* Don't promote wm_size to unsigned... */
if (wm_size > (long)wm->max_wm)
wm_size = wm->max_wm;
if (wm_size <= 0)
if (wm_size <= 0) {
wm_size = wm->default_wm;
DRM_ERROR("Insufficient FIFO for plane, expect flickering:"
" entries required = %ld, available = %lu.\n",
entries_required + wm->guard_size,
wm->fifo_size);
}
return wm_size;
}