[PATCH 1/1] drm/mediatek: Fix errors when reporting rotation capability

[Hsiao Chien Sung <shawn.sung@mediatek.com>]

For CRTCs that doesn't support rotation should still return
DRM_MODE_ROTATE_0. Since both OVL and OVL adaptor on MTK chip
doesn't support rotation, return the capability of the
hardware accordingly.

Fixes: df4444577118 ("drm/mediatek: Support 180 degree rotation")
Fixes: 84d805753983 ("drm/mediatek: Support reflect-y plane rotation")

Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_drv.h         | 1 +
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c         | 8 +-------
 drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 5 +++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c     | 1 +
 drivers/gpu/drm/mediatek/mtk_drm_plane.c        | 2 +-
 5 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 2254038519e1..f4c7dba8f73d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -120,6 +120,7 @@ void mtk_ovl_adaptor_register_vblank_cb(struct device *dev, void (*vblank_cb)(vo
 void mtk_ovl_adaptor_unregister_vblank_cb(struct device *dev);
 void mtk_ovl_adaptor_enable_vblank(struct device *dev);
 void mtk_ovl_adaptor_disable_vblank(struct device *dev);
+unsigned int mtk_ovl_adaptor_supported_rotations(struct device *dev);
 void mtk_ovl_adaptor_start(struct device *dev);
 void mtk_ovl_adaptor_stop(struct device *dev);
 unsigned int mtk_ovl_adaptor_layer_nr(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2bffe4245466..5fd1f6ae41f3 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -288,8 +288,7 @@ unsigned int mtk_ovl_layer_nr(struct device *dev)

 unsigned int mtk_ovl_supported_rotations(struct device *dev)
 {
-	return DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
-	       DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
+	return DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
 }

 int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
@@ -302,11 +301,6 @@ int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
 					 DRM_MODE_ROTATE_0 |
 					 DRM_MODE_REFLECT_X |
 					 DRM_MODE_REFLECT_Y);
-	rotation &= ~DRM_MODE_ROTATE_0;
-
-	/* We can only do reflection, not rotation */
-	if ((rotation & DRM_MODE_ROTATE_MASK) != 0)
-		return -EINVAL;

 	/*
 	 * TODO: Rotating/reflecting YUV buffers is not supported at this time.
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
index 6bf6367853fb..922db8df572d 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
@@ -277,6 +277,11 @@ void mtk_ovl_adaptor_register_vblank_cb(struct device *dev, void (*vblank_cb)(vo
 				     vblank_cb, vblank_cb_data);
 }

+unsigned int mtk_ovl_adaptor_supported_rotations(struct device *dev)
+{
+	return DRM_MODE_ROTATE_0;
+}
+
 void mtk_ovl_adaptor_unregister_vblank_cb(struct device *dev)
 {
 	struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 771f4e173353..f7f972f0d46d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -412,6 +412,7 @@ static const struct mtk_ddp_comp_funcs ddp_ovl_adaptor = {
 	.remove = mtk_ovl_adaptor_remove_comp,
 	.get_formats = mtk_ovl_adaptor_get_formats,
 	.get_num_formats = mtk_ovl_adaptor_get_num_formats,
+	.supported_rotations = mtk_ovl_adaptor_supported_rotations,
 };

 static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index db2f70ae060d..371de196d400 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -315,7 +315,7 @@ int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 		return err;
 	}

-	if (supported_rotations & ~DRM_MODE_ROTATE_0) {
+	if (supported_rotations) {
 		err = drm_plane_create_rotation_property(plane,
 							 DRM_MODE_ROTATE_0,
 							 supported_rotations);
--
2.18.0