drm/tegra: Atomic conversion, phase 3, step 1

Switch out the regular plane helpers for the atomic plane helpers. Also
use the default atomic helpers to implement the ->atomic_check() and
->atomic_commit() callbacks. The driver now exclusively uses the atomic
interfaces.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/dc.c

@@ -397,8 +397,8 @@ static void tegra_primary_plane_destroy(struct drm_plane *plane)
 }
 
 static const struct drm_plane_funcs tegra_primary_plane_funcs = {
-	.update_plane = drm_plane_helper_update,
-	.disable_plane = drm_plane_helper_disable,
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = tegra_primary_plane_destroy,
 	.reset = drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
@@ -683,8 +683,8 @@ static void tegra_cursor_atomic_disable(struct drm_plane *plane,
 }
 
 static const struct drm_plane_funcs tegra_cursor_plane_funcs = {
-	.update_plane = drm_plane_helper_update,
-	.disable_plane = drm_plane_helper_disable,
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = tegra_plane_destroy,
 	.reset = drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
@@ -733,8 +733,8 @@ static void tegra_overlay_plane_destroy(struct drm_plane *plane)
 }
 
 static const struct drm_plane_funcs tegra_overlay_plane_funcs = {
-	.update_plane = drm_plane_helper_update,
-	.disable_plane = drm_plane_helper_disable,
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = tegra_overlay_plane_destroy,
 	.reset = drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,

drivers/gpu/drm/tegra/drm.c

@@ -10,6 +10,8 @@
 #include <linux/host1x.h>
 #include <linux/iommu.h>
 
+#include <drm/drm_atomic_helper.h>
+
 #include "drm.h"
 #include "gem.h"
 
@@ -29,6 +31,8 @@ static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
 #ifdef CONFIG_DRM_TEGRA_FBDEV
 	.output_poll_changed = tegra_fb_output_poll_changed,
 #endif
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
 };
 
 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)