drm/radeon: Use cursor_set2 hook for enabling / disabling the HW cursor

The cursor_set2 hook provides the cursor hotspot position within the
cursor image. When the hotspot position changes, we can adjust the cursor
position such that the hotspot doesn't move on the screen. This prevents
the cursor from appearing to intermittently jump around on the screen
when the position of the hotspot within the cursor image changes.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 40 insertions, 11 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cursor.c b/drivers/gpu/drm/radeon/radeon_cursor.c
index 9630e8d95fb4..fd4bddfd67d6 100644
--- a/drivers/gpu/drm/radeon/radeon_cursor.c
+++ b/drivers/gpu/drm/radeon/radeon_cursor.c
@@ -117,8 +117,10 @@ static void radeon_show_cursor(struct drm_crtc *crtc)
 	}
 }
 
+static int radeon_cursor_move_locked(struct drm_crtc *crtc, int x, int y);
+
 static void radeon_set_cursor(struct drm_crtc *crtc, struct drm_gem_object *obj,
-			      uint64_t gpu_addr)
+			      uint64_t gpu_addr, int hot_x, int hot_y)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;
@@ -142,13 +144,28 @@ static void radeon_set_cursor(struct drm_crtc *crtc, struct drm_gem_object *obj,
 		/* offset is from DISP(2)_BASE_ADDRESS */
 		WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, radeon_crtc->legacy_cursor_offset);
 	}
+
+	if (hot_x != radeon_crtc->cursor_hot_x ||
+	    hot_y != radeon_crtc->cursor_hot_y) {
+		int x, y;
+
+		x = radeon_crtc->cursor_x + radeon_crtc->cursor_hot_x - hot_x;
+		y = radeon_crtc->cursor_y + radeon_crtc->cursor_hot_y - hot_y;
+
+		radeon_cursor_move_locked(crtc, x, y);
+
+		radeon_crtc->cursor_hot_x = hot_x;
+		radeon_crtc->cursor_hot_y = hot_y;
+	}
 }
 
-int radeon_crtc_cursor_set(struct drm_crtc *crtc,
-			   struct drm_file *file_priv,
-			   uint32_t handle,
-			   uint32_t width,
-			   uint32_t height)
+int radeon_crtc_cursor_set2(struct drm_crtc *crtc,
+			    struct drm_file *file_priv,
+			    uint32_t handle,
+			    uint32_t width,
+			    uint32_t height,
+			    int32_t hot_x,
+			    int32_t hot_y)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;
@@ -192,7 +209,7 @@ int radeon_crtc_cursor_set(struct drm_crtc *crtc,
 	radeon_crtc->cursor_height = height;
 
 	radeon_lock_cursor(crtc, true);
-	radeon_set_cursor(crtc, obj, gpu_addr);
+	radeon_set_cursor(crtc, obj, gpu_addr, hot_x, hot_y);
 	radeon_show_cursor(crtc);
 	radeon_lock_cursor(crtc, false);
 
@@ -215,8 +232,7 @@ fail:
 	return ret;
 }
 
-int radeon_crtc_cursor_move(struct drm_crtc *crtc,
-			    int x, int y)
+static int radeon_cursor_move_locked(struct drm_crtc *crtc, int x, int y)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 	struct radeon_device *rdev = crtc->dev->dev_private;
@@ -281,7 +297,6 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc,
 		}
 	}
 
-	radeon_lock_cursor(crtc, true);
 	if (ASIC_IS_DCE4(rdev)) {
 		WREG32(EVERGREEN_CUR_POSITION + radeon_crtc->crtc_offset, (x << 16) | y);
 		WREG32(EVERGREEN_CUR_HOT_SPOT + radeon_crtc->crtc_offset, (xorigin << 16) | yorigin);
@@ -308,7 +323,21 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc,
 		WREG32(RADEON_CUR_OFFSET + radeon_crtc->crtc_offset, (radeon_crtc->legacy_cursor_offset +
 								      (yorigin * 256)));
 	}
-	radeon_lock_cursor(crtc, false);
+
+	radeon_crtc->cursor_x = x;
+	radeon_crtc->cursor_y = y;
 
 	return 0;
 }
+
+int radeon_crtc_cursor_move(struct drm_crtc *crtc,
+			    int x, int y)
+{
+	int ret;
+
+	radeon_lock_cursor(crtc, true);
+	ret = radeon_cursor_move_locked(crtc, x, y);
+	radeon_lock_cursor(crtc, false);
+
+	return ret;
+}