drm/radeon/kms: add wait_for_vblank asic callback
Required for future functionality.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 99bb006..65fe8e0 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -65,6 +65,40 @@
#include "r100_track.h"
+void r100_wait_for_vblank(struct radeon_device *rdev, int crtc)
+{
+ struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc];
+ int i;
+
+ if (radeon_crtc->crtc_id == 0) {
+ if (RREG32(RADEON_CRTC_GEN_CNTL) & RADEON_CRTC_EN) {
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ if (!(RREG32(RADEON_CRTC_STATUS) & RADEON_CRTC_VBLANK_CUR))
+ break;
+ udelay(1);
+ }
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ if (RREG32(RADEON_CRTC_STATUS) & RADEON_CRTC_VBLANK_CUR)
+ break;
+ udelay(1);
+ }
+ }
+ } else {
+ if (RREG32(RADEON_CRTC2_GEN_CNTL) & RADEON_CRTC2_EN) {
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ if (!(RREG32(RADEON_CRTC2_STATUS) & RADEON_CRTC2_VBLANK_CUR))
+ break;
+ udelay(1);
+ }
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ if (RREG32(RADEON_CRTC2_STATUS) & RADEON_CRTC2_VBLANK_CUR)
+ break;
+ udelay(1);
+ }
+ }
+ }
+}
+
/* This files gather functions specifics to:
* r100,rv100,rs100,rv200,rs200,r200,rv250,rs300,rv280
*/