summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorInki Dae <inki.dae@samsung.com>2012-08-24 10:54:12 -0700
committerInki Dae <inki.dae@samsung.com>2012-10-04 10:06:00 +0900
commitbcf4cef94294992f7cd11d5a90fa58b0eae6c795 (patch)
tree773fd6c9028c0dda8ed9dae689ff38c7a8958853 /drivers
parent1b85a0715f4615f953733c4afa6ec59cd0e73b52 (diff)
drm/exynos: Disable plane when released
this patch ensures that each plane connected to encoder is disabled when released, by adding disable callback function of encoder helper we had faced with one issue that invalid memory is accessed by dma once drm is released and then the dma is turned on again. actually, in our case, page fault was incurred with iommu. the reason is that a gem buffer accessed by the dma is also released once drm is released. so this patch would fix this issue ensuring the dma is disabled when released. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_encoder.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 92f9acf77b7f..96a10c38cd72 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -214,12 +214,27 @@ static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
manager_ops->commit(manager->dev);
}
+static void exynos_drm_encoder_disable(struct drm_encoder *encoder)
+{
+ struct drm_plane *plane;
+ struct drm_device *dev = encoder->dev;
+
+ exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+
+ /* all planes connected to this encoder should be also disabled. */
+ list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
+ if (plane->crtc == encoder->crtc)
+ plane->funcs->disable_plane(plane);
+ }
+}
+
static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
.dpms = exynos_drm_encoder_dpms,
.mode_fixup = exynos_drm_encoder_mode_fixup,
.mode_set = exynos_drm_encoder_mode_set,
.prepare = exynos_drm_encoder_prepare,
.commit = exynos_drm_encoder_commit,
+ .disable = exynos_drm_encoder_disable,
};
static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)