drm/radeon: rework page flip handling v4

Instead of trying to flip inside the vblank period when
the buffer is idle, offload blocking for idle to a kernel
thread and program the flip directly into the hardware.

v2: add error handling, fix EBUSY handling
v3: add proper exclusive_lock handling
v4: update crtc->primary->fb when the flip actually happens

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

1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 2eaa3300099e..dd4da88b3ab1 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -676,14 +676,16 @@ void radeon_doorbell_free(struct radeon_device *rdev, u32 doorbell);
  * IRQS.
  */
 
-struct radeon_unpin_work {
-        struct work_struct work;
-        struct radeon_device *rdev;
-        int crtc_id;
-        struct radeon_fence *fence;
+struct radeon_flip_work {
+        struct work_struct              flip_work;
+        struct work_struct              unpin_work;
+        struct radeon_device            *rdev;
+        int                             crtc_id;
+        struct drm_framebuffer          *fb;
         struct drm_pending_vblank_event *event;
-        struct radeon_bo *old_rbo;
-        u64 new_crtc_base;
+        struct radeon_bo                *old_rbo;
+        struct radeon_bo                *new_rbo;
+        struct radeon_fence             *fence;
 };
 
 struct r500_irq_stat_regs {