diff options
| -rw-r--r-- | drivers/gpu/drm/radeon/rs600.c | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index 5a0fc74c2ba..46fa1b07c56 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -52,23 +52,59 @@ static const u32 crtc_offsets[2] = AVIVO_D2CRTC_H_TOTAL - AVIVO_D1CRTC_H_TOTAL }; +static bool avivo_is_in_vblank(struct radeon_device *rdev, int crtc) +{ + if (RREG32(AVIVO_D1CRTC_STATUS + crtc_offsets[crtc]) & AVIVO_D1CRTC_V_BLANK) + return true; + else + return false; +} + +static bool avivo_is_counter_moving(struct radeon_device *rdev, int crtc) +{ + u32 pos1, pos2; + + pos1 = RREG32(AVIVO_D1CRTC_STATUS_POSITION + crtc_offsets[crtc]); + pos2 = RREG32(AVIVO_D1CRTC_STATUS_POSITION + crtc_offsets[crtc]); + + if (pos1 != pos2) + return true; + else + return false; +} + +/** + * avivo_wait_for_vblank - vblank wait asic callback. + * + * @rdev: radeon_device pointer + * @crtc: crtc to wait for vblank on + * + * Wait for vblank on the requested crtc (r5xx-r7xx). + */ void avivo_wait_for_vblank(struct radeon_device *rdev, int crtc) { - int i; + unsigned i = 0; if (crtc >= rdev->num_crtc) return; - if (RREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[crtc]) & AVIVO_CRTC_EN) { - for (i = 0; i < rdev->usec_timeout; i++) { - if (!(RREG32(AVIVO_D1CRTC_STATUS + crtc_offsets[crtc]) & AVIVO_D1CRTC_V_BLANK)) + if (!(RREG32(AVIVO_D1CRTC_CONTROL + crtc_offsets[crtc]) & AVIVO_CRTC_EN)) + return; + + /* depending on when we hit vblank, we may be close to active; if so, + * wait for another frame. + */ + while (avivo_is_in_vblank(rdev, crtc)) { + if (i++ % 100 == 0) { + if (!avivo_is_counter_moving(rdev, crtc)) break; - udelay(1); } - for (i = 0; i < rdev->usec_timeout; i++) { - if (RREG32(AVIVO_D1CRTC_STATUS + crtc_offsets[crtc]) & AVIVO_D1CRTC_V_BLANK) + } + + while (!avivo_is_in_vblank(rdev, crtc)) { + if (i++ % 100 == 0) { + if (!avivo_is_counter_moving(rdev, crtc)) break; - udelay(1); } } } |