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Commit 8e09bf83 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
Browse files

drm/i915: Use mmio flips to change tiling mode on Baytrail 

For whatever reason, MI_DISPLAY_FLIP fails to change tiling mode on
Baytrail, so just use CPU driven mmio flips instead.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76176


Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 2a92d5bc

drivers/gpu/drm/i915/intel_display.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -9435,6 +9435,9 @@ static bool use_mmio_flip(struct intel_engine_cs *ring, 
	 * So using MMIO flips there would disrupt this mechanism.

	 * So using MMIO flips there would disrupt this mechanism.

	 */

	 */





	if (ring == NULL)

		return true;



	if (INTEL_INFO(ring->dev)->gen < 5)

	if (INTEL_INFO(ring->dev)->gen < 5)

		return false;

		return false;
@@ -9658,6 +9661,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, 




	if (IS_VALLEYVIEW(dev)) {

	if (IS_VALLEYVIEW(dev)) {

		ring = &dev_priv->ring[BCS];

		ring = &dev_priv->ring[BCS];

		if (obj->tiling_mode != work->old_fb_obj->tiling_mode)

			/* vlv: DISPLAY_FLIP fails to change tiling */

			ring = NULL;

	} else if (IS_IVYBRIDGE(dev)) {

	} else if (IS_IVYBRIDGE(dev)) {

		ring = &dev_priv->ring[BCS];

		ring = &dev_priv->ring[BCS];

	} else if (INTEL_INFO(dev)->gen >= 7) {

	} else if (INTEL_INFO(dev)->gen >= 7) {