diff options
authorLauri Kasanen <cand@gmx.com>2014-02-28 20:50:23 +0200
committerAlex Deucher <alexander.deucher@amd.com>2014-03-06 16:46:55 -0500
commit14eedc32a3c0ec9dd70448a73763ee21feae3111 (patch)
parent6d7c2a672fdc74082847f5c5c735b6ed7e734b2c (diff)
drm/radeon: TTM must be init with cpu-visible VRAM, v2
Without this, a bo may get created in the cpu-inaccessible vram. Before the CP engines get setup, all copies are done via cpu memcpy. This means that the cpu tries to read from inaccessible memory, fails, and the radeon module proceeds to disable acceleration. Doing this has no downsides, as the real VRAM size gets set as soon as the CP engines get init. This is a candidate for 3.14 fixes. v2: Add comment on why the function is used Signed-off-by: Lauri Kasanen <cand@gmx.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian K├Ânig <christian.koenig@amd.com> Cc: stable@vger.kernel.org
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 77f5b0c3edb8..5cdba9b82d08 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -714,6 +714,9 @@ int radeon_ttm_init(struct radeon_device *rdev)
DRM_ERROR("Failed initializing VRAM heap.\n");
return r;
+ /* Change the size here instead of the init above so only lpfn is affected */
+ radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
r = radeon_bo_create(rdev, 256 * 1024, PAGE_SIZE, true,
NULL, &rdev->stollen_vga_memory);