drm/radeon/kms: add some loop timeouts in pageflip code

[pandora-kernel.git] / drivers / gpu / drm / radeon / r100.c

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index ad158ea..bfc08f6 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -187,13 +187,18 @@ u32 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;
+       int i;
 
        /* Lock the graphics update lock */
        /* update the scanout addresses */
        WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, tmp);
 
        /* Wait for update_pending to go high. */
-       while (!(RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET));
+       for (i = 0; i < rdev->usec_timeout; i++) {
+               if (RREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset) & RADEON_CRTC_OFFSET__GUI_TRIG_OFFSET)
+                       break;
+               udelay(1);
+       }
        DRM_DEBUG("Update pending now high. Unlocking vupdate_lock.\n");
 
        /* Unlock the lock, so double-buffering can take place inside vblank */