drm: renesas: shmobile: Unify plane allocation

Unify primary and overlay plane allocation:
  - Enhance shmob_drm_plane_create() so it can be used to create the
    primary plane, too,
  - Move overlay plane creation next to primary plane creation.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/adbc5febc0099fd1910f32a7af1c8e0f570f74b4.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c

@@ -19,7 +19,6 @@
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_modeset_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
-#include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
 #include <drm/drm_vblank.h>
@@ -453,47 +452,29 @@ static const struct drm_crtc_funcs crtc_funcs = {
 	.disable_vblank = shmob_drm_disable_vblank,
 };
 
-static const uint32_t modeset_formats[] = {
-	DRM_FORMAT_RGB565,
-	DRM_FORMAT_RGB888,
-	DRM_FORMAT_ARGB8888,
-	DRM_FORMAT_XRGB8888,
-	DRM_FORMAT_NV12,
-	DRM_FORMAT_NV21,
-	DRM_FORMAT_NV16,
-	DRM_FORMAT_NV61,
-	DRM_FORMAT_NV24,
-	DRM_FORMAT_NV42,
-};
-
-static const struct drm_plane_funcs primary_plane_funcs = {
-	DRM_PLANE_NON_ATOMIC_FUNCS,
-};
-
 int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
 {
 	struct drm_crtc *crtc = &sdev->crtc.crtc;
-	struct drm_plane *primary;
+	struct drm_plane *primary, *plane;
+	unsigned int i;
 	int ret;
 
 	sdev->crtc.dpms = DRM_MODE_DPMS_OFF;
 
-	primary = __drm_universal_plane_alloc(&sdev->ddev, sizeof(*primary), 0,
-					      0, &primary_plane_funcs,
-					      modeset_formats,
-					      ARRAY_SIZE(modeset_formats),
-					      NULL, DRM_PLANE_TYPE_PRIMARY,
-					      NULL);
+	primary = shmob_drm_plane_create(sdev, DRM_PLANE_TYPE_PRIMARY, 0);
 	if (IS_ERR(primary))
 		return PTR_ERR(primary);
 
+	for (i = 1; i < 5; ++i) {
+		plane = shmob_drm_plane_create(sdev, DRM_PLANE_TYPE_OVERLAY, i);
+		if (IS_ERR(plane))
+			return PTR_ERR(plane);
+	}
+
 	ret = drm_crtc_init_with_planes(&sdev->ddev, crtc, primary, NULL,
 					&crtc_funcs, NULL);
-	if (ret < 0) {
-		drm_plane_cleanup(primary);
-		kfree(primary);
+	if (ret < 0)
 		return ret;
-	}
 
 	drm_crtc_helper_add(crtc, &crtc_helper_funcs);
 

drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c

@@ -180,7 +180,6 @@ static int shmob_drm_probe(struct platform_device *pdev)
 	struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
 	struct shmob_drm_device *sdev;
 	struct drm_device *ddev;
-	unsigned int i;
 	int ret;
 
 	if (pdata == NULL) {
@@ -221,14 +220,6 @@ static int shmob_drm_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, ret,
 				     "failed to initialize mode setting\n");
 
-	for (i = 0; i < 4; ++i) {
-		ret = shmob_drm_plane_create(sdev, i);
-		if (ret < 0) {
-			dev_err(&pdev->dev, "failed to create plane %u\n", i);
-			goto err_modeset_cleanup;
-		}
-	}
-
 	ret = drm_vblank_init(ddev, 1);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to initialize vblank\n");

drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.c

@@ -12,6 +12,7 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_plane_helper.h>
 
 #include "shmob_drm_drv.h"
 #include "shmob_drm_kms.h"
@@ -179,7 +180,12 @@ static int shmob_drm_plane_disable(struct drm_plane *plane,
 	return 0;
 }
 
-static const struct drm_plane_funcs shmob_drm_plane_funcs = {
+static const struct drm_plane_funcs shmob_drm_primary_plane_funcs = {
+	.update_plane = drm_plane_helper_update_primary,
+	.disable_plane = drm_plane_helper_disable_primary,
+};
+
+static const struct drm_plane_funcs shmob_drm_overlay_plane_funcs = {
 	.update_plane = shmob_drm_plane_update,
 	.disable_plane = shmob_drm_plane_disable,
 };
@@ -197,19 +203,28 @@ static const uint32_t formats[] = {
 	DRM_FORMAT_NV42,
 };
 
-int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
+struct drm_plane *shmob_drm_plane_create(struct shmob_drm_device *sdev,
+					 enum drm_plane_type type,
+					 unsigned int index)
 {
+	const struct drm_plane_funcs *funcs;
 	struct shmob_drm_plane *splane;
 
-	splane = drmm_universal_plane_alloc(&sdev->ddev, struct shmob_drm_plane,
-					    plane, 1, &shmob_drm_plane_funcs,
-					    formats, ARRAY_SIZE(formats), NULL,
-					    DRM_PLANE_TYPE_OVERLAY, NULL);
+	if (type == DRM_PLANE_TYPE_PRIMARY)
+		funcs = &shmob_drm_primary_plane_funcs;
+	else
+		funcs = &shmob_drm_overlay_plane_funcs;
+
+	splane = drmm_universal_plane_alloc(&sdev->ddev,
+					    struct shmob_drm_plane, plane, 1,
+					    funcs, formats,
+					    ARRAY_SIZE(formats),  NULL, type,
+					    NULL);
 	if (IS_ERR(splane))
-		return PTR_ERR(splane);
+		return ERR_CAST(splane);
 
 	splane->index = index;
 	splane->alpha = 255;
 
-	return 0;
+	return &splane->plane;
 }

drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h

@@ -13,7 +13,9 @@
 struct drm_plane;
 struct shmob_drm_device;
 
-int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index);
+struct drm_plane *shmob_drm_plane_create(struct shmob_drm_device *sdev,
+					 enum drm_plane_type type,
+					 unsigned int index);
 void shmob_drm_plane_setup(struct drm_plane *plane);
 
 #endif /* __SHMOB_DRM_PLANE_H__ */