From: Zhao Junwang <zhjwpku@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Zhao Junwang <zhjwpku@xxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_helper.c | 55 +++++++++++++++++++++++++++++++++++
include/drm/drm_atomic_helper.h | 7 +++++
2 files changed, 62 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 536ae4d..3d94ff8 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1336,6 +1336,61 @@ void drm_atomic_helper_swap_state(struct drm_device *dev,
EXPORT_SYMBOL(drm_atomic_helper_swap_state);
/**
+ * drm_atomic_helper_plane_check_update
+ * @plane: plane object to update
+ * @state: drm plane state
+ * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
+ * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
+ * @can_position: is it legal to position the plane such that it
+ * doesn't cover the entire crtc? This will generally
+ * only be false for primary planes.
+ * @can_update_disabled: can the plane be updated while the crtc
+ * is disabled?
+ *
+ * Provide a default plane check update handler
+ *
+ * RETURNS:
+ * Zero on success, error code on failure
+ */
+int drm_atomic_helper_plane_check_update(struct drm_plane *plane,
+ struct drm_plane_state *state,
+ int min_scale,
+ int max_scale,
+ bool can_position,
+ bool can_update_disabled,
+ bool *visible)
+{
+ struct drm_crtc *crtc = state->crtc;
+ struct drm_framebuffer *fb = state->fb;
+
+ if (!fb)
+ return 0;
+
+ struct drm_rect src = {
+ .x1 = state->src_x,
+ .y1 = state->src_y,
+ .x2 = state->src_x + state->src_w,
+ .y2 = state->src_y + state->src_h,
+ };
+ struct drm_rect dest = {
+ .x1 = state->crtc_x,
+ .y1 = state->crtc_y,
+ .x2 = state->crtc_x + state->crtc_w,
+ .y2 = state->crtc_y + state->crtc_h,
+ };
+ const struct drm_rect clip = {
+ .x2 = crtc->mode.hdisplay,
+ .y2 = crtc->mode.vdisplay,
+ };
+
+ return drm_plane_helper_check_update(plane, crtc, fb,
+ &src, &dest, &clip,
+ min_scale, max_scale,
+ can_position, can_update_disabled, visible);
+}
+EXPORT_SYMBOL(drm_atomic_helper_plane_check_update);
+
+/**
* drm_atomic_helper_update_plane - Helper for primary plane update using atomic
* @plane: plane object to update
* @crtc: owning CRTC of owning plane
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index cc1fee8..5305a01 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -64,6 +64,13 @@ void drm_atomic_helper_swap_state(struct drm_device *dev,
struct drm_atomic_state *state);
/* implementations for legacy interfaces */
+int drm_atomic_helper_plane_check_update(struct drm_plane *plane,
+ struct drm_plane_state *state,
+ int min_scale,
+ int max_scale,
+ bool can_position,
+ bool can_update_disabled,
+ bool *visible);
int drm_atomic_helper_update_plane(struct drm_plane *plane,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
--
1.7.10.4
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