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Commit 96ea47c0 authored by Michel Dänzer's avatar Michel Dänzer Committed by Alex Deucher
Browse files

drm/radeon: Disable uncacheable CPU mappings of GTT with RV6xx 

They reportedly cause random GPU hangs.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91268



Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5bad7d29

drivers/gpu/drm/radeon/radeon_object.c

+6 −0
Original line number Diff line number Diff line
@@ -221,6 +221,12 @@ int radeon_bo_create(struct radeon_device *rdev, 
	if (!(rdev->flags & RADEON_IS_PCIE))

		bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);



	/* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx

	 * See https://bugs.freedesktop.org/show_bug.cgi?id=91268

	 */

	if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635)

		bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);



#ifdef CONFIG_X86_32

	/* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit

	 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627