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

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

drivers/gpu/drm/i915/intel_display.c

+7 −1
Original line number Diff line number Diff line
@@ -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;

}