[PATCH] drm/sun4i: framebuffer: Set mode_config.normalize_zpos

Back when support for zpos was added in commit 47a05f4a68f9 ("drm/sun4i:
backend: Add support for zpos"), a custom atomic_check callback was also
added in commit b8f1230dd3bf ("drm/sun4i: framebuffer: Add a custom
atomic_check") to have a place to call drm_atomic_normalize_zpos().

Commit 49efffc7fbd4 ("drm: Add drm_mode_config->normalize_zpos boolean")
added drm_atomic_normalize_zpos() to the standard atomic_check function.

Set mode_config.normalize_zpos and drop the custom atomic_check
implementation, which at this point is just a simplified copy of the
standard one. The standard one also checks whether async updates are
valid and updates the self refresh state, but neither feature is
supported by this driver.

Signed-off-by: Chen-Yu Tsai <[email protected]>
---
 drivers/gpu/drm/sun4i/sun4i_framebuffer.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
index 9c8ef927d929..fc822bc2c62b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_framebuffer.c
@@ -14,24 +14,8 @@
 #include "sun4i_drv.h"
 #include "sun4i_framebuffer.h"
 
-static int sun4i_de_atomic_check(struct drm_device *dev,
-				 struct drm_atomic_commit *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;
-
-	return drm_atomic_helper_check_planes(dev, state);
-}
-
 static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
-	.atomic_check		= sun4i_de_atomic_check,
+	.atomic_check		= drm_atomic_helper_check,
 	.atomic_commit		= drm_atomic_helper_commit,
 	.fb_create		= drm_gem_fb_create,
 };
@@ -46,6 +30,7 @@ void sun4i_framebuffer_init(struct drm_device *drm)
 
 	drm->mode_config.max_width = 8192;
 	drm->mode_config.max_height = 8192;
+	drm->mode_config.normalize_zpos = true;
 
 	drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
 	drm->mode_config.helper_private = &sun4i_de_mode_config_helpers;
-- 
2.55.0.571.g244d577d93-goog