[PATCH 2/2] drm/omap: Normalize the zpos and use the normalized_zpos in runtime

[Peter Ujfalusi]

To avoid zpos collision, use the normalized_zpos when configuring the
zorder of the plane.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c   | 26 +++++++++++++++++++++++++-
 drivers/gpu/drm/omapdrm/omap_plane.c |  2 +-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 6bfc2d9ebb46..230df6d8edd1 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -21,6 +21,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_blend.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>
 
@@ -54,6 +55,29 @@ MODULE_PARM_DESC(displays,
  *                 devices
  */
 
+int omap_atomic_helper_check(struct drm_device *dev,
+			     struct drm_atomic_state *state)
+{
+	int ret;
+
+	ret = drm_atomic_helper_check_modeset(dev, state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_normalize_zpos(dev, state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_helper_check_planes(dev, state);
+	if (ret)
+		return ret;
+
+	if (state->legacy_cursor_update)
+		state->async_update = !drm_atomic_helper_async_check(dev, state);
+
+	return ret;
+}
+
 static void omap_atomic_wait_for_completion(struct drm_device *dev,
 					    struct drm_atomic_state *old_state)
 {
@@ -133,7 +157,7 @@ static const struct drm_mode_config_helper_funcs omap_mode_config_helper_funcs =
 static const struct drm_mode_config_funcs omap_mode_config_funcs = {
 	.fb_create = omap_framebuffer_create,
 	.output_poll_changed = drm_fb_helper_output_poll_changed,
-	.atomic_check = drm_atomic_helper_check,
+	.atomic_check = omap_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
 
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index bbbdd560e503..abd78b511e6d 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -65,7 +65,7 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
 	info.rotation_type = OMAP_DSS_ROT_NONE;
 	info.rotation = DRM_MODE_ROTATE_0;
 	info.global_alpha = 0xff;
-	info.zorder = state->zpos;
+	info.zorder = state->normalized_zpos;
 
 	/* update scanout: */
 	omap_framebuffer_update_scanout(state->fb, state, &info);
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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