drm/radeon: split page flip and pending callback

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 840651f33610..52548f7bbb5a 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -152,9 +152,8 @@ void r100_wait_for_vblank(struct radeon_device *rdev, int crtc)
  * During vblank we take the crtc lock and wait for the update_pending
  * bit to go high, when it does, we release the lock, and allow the
  * double buffered update to take place.
- * Returns the current update pending status.
  */
-u32 r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
+void r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
 {
         struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
         u32 tmp = ((u32)crtc_base) | RADEON_CRTC_OFFSET__OFFSET_LOCK;
@@ -176,8 +175,24 @@ u32 r100_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
         tmp &= ~RADEON_CRTC_OFFSET__OFFSET_LOCK;
         WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
 
+}
+
+/**
+ * r100_page_flip_pending - check if page flip is still pending
+ *
+ * @rdev: radeon_device pointer
+ * @crtc_id: crtc to check
+ *
+ * Check if the last pagefilp is still pending (r1xx-r4xx).
+ * Returns the current update pending status.
+ */
+bool r100_page_flip_pending(struct radeon_device *rdev, int crtc_id)
+{
+        struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
+
         /* Return current update_pending status: */
-        return RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET;
+        return !!(RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) &
+                RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET);
 }
 
 /**