Commit b9421ae8 authored by Chris Wilson's avatar Chris Wilson Committed by Eric Anholt

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

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 8de9b311
...@@ -2745,8 +2745,14 @@ static unsigned long intel_calculate_wm(unsigned long clock_in_khz, ...@@ -2745,8 +2745,14 @@ static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
/* Don't promote wm_size to unsigned... */ /* Don't promote wm_size to unsigned... */
if (wm_size > (long)wm->max_wm) if (wm_size > (long)wm->max_wm)
wm_size = wm->max_wm; wm_size = wm->max_wm;
if (wm_size <= 0) if (wm_size <= 0) {
wm_size = wm->default_wm; 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; return wm_size;
} }
......
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