drm/tegra: dc: Support rotation property

Currently only the DRM_MODE_REFLECT_Y rotation is supported. The driver
already supports reflection on the Y axis via a custom flag which is not
very useful because it requires custom userspace. Add the standard
rotation property that supports 0 degree rotation and Y axis reflection
for primary and overlay planes to provide a better interface than the
custom flag.

v2: keep custom flag for ABI compatibility (Dmitry)

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

3 files changed, 28 insertions, 1 deletions

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 31e12a9dfcb8..c3afe7b2237e 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -596,6 +596,7 @@ static int tegra_plane_atomic_check(struct drm_plane *plane,
                                     struct drm_plane_state *state)
 {
         struct tegra_plane_state *plane_state = to_tegra_plane_state(state);
+        unsigned int rotation = DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_Y;
         struct tegra_bo_tiling *tiling = &plane_state->tiling;
         struct tegra_plane *tegra = to_tegra_plane(plane);
         struct tegra_dc *dc = to_tegra_dc(state->crtc);
@@ -633,6 +634,13 @@ static int tegra_plane_atomic_check(struct drm_plane *plane,
                 return -EINVAL;
         }
 
+        rotation = drm_rotation_simplify(state->rotation, rotation);
+
+        if (rotation & DRM_MODE_REFLECT_Y)
+                plane_state->bottom_up = true;
+        else
+                plane_state->bottom_up = false;
+
         /*
          * Tegra doesn't support different strides for U and V planes so we
          * error out if the user tries to display a framebuffer with such a
@@ -693,7 +701,7 @@ static void tegra_plane_atomic_update(struct drm_plane *plane,
         window.dst.w = drm_rect_width(&plane->state->dst);
         window.dst.h = drm_rect_height(&plane->state->dst);
         window.bits_per_pixel = fb->format->cpp[0] * 8;
-        window.bottom_up = tegra_fb_is_bottom_up(fb);
+        window.bottom_up = tegra_fb_is_bottom_up(fb) || state->bottom_up;
 
         /* copy from state */
         window.zpos = plane->state->normalized_zpos;
@@ -776,6 +784,14 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
         drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
         drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
 
+        err = drm_plane_create_rotation_property(&plane->base,
+                                                 DRM_MODE_ROTATE_0,
+                                                 DRM_MODE_ROTATE_0 |
+                                                 DRM_MODE_REFLECT_Y);
+        if (err < 0)
+                dev_err(dc->dev, "failed to create rotation property: %d\n",
+                        err);
+
         return &plane->base;
 }
 
@@ -1053,6 +1069,14 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
         drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
         drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
 
+        err = drm_plane_create_rotation_property(&plane->base,
+                                                 DRM_MODE_ROTATE_0,
+                                                 DRM_MODE_ROTATE_0 |
+                                                 DRM_MODE_REFLECT_Y);
+        if (err < 0)
+                dev_err(dc->dev, "failed to create rotation property: %d\n",
+                        err);
+
         return &plane->base;
 }
 
diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
index 0406c2ef432c..d068e8aa3553 100644
--- a/drivers/gpu/drm/tegra/plane.c
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -56,6 +56,7 @@ tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
         copy->tiling = state->tiling;
         copy->format = state->format;
         copy->swap = state->swap;
+        copy->bottom_up = state->bottom_up;
         copy->opaque = state->opaque;
 
         for (i = 0; i < 2; i++)
diff --git a/drivers/gpu/drm/tegra/plane.h b/drivers/gpu/drm/tegra/plane.h
index 7360ddfafee8..e79e6b4a8e0a 100644
--- a/drivers/gpu/drm/tegra/plane.h
+++ b/drivers/gpu/drm/tegra/plane.h
@@ -46,6 +46,8 @@ struct tegra_plane_state {
         u32 format;
         u32 swap;
 
+        bool bottom_up;
+
         /* used for legacy blending support only */
         struct tegra_plane_legacy_blending_state blending[2];
         bool opaque;