diff options
| -rw-r--r-- | drivers/gpu/drm/radeon/r100.c | 77 |
1 files changed, 53 insertions, 24 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index 8ff7cac222d..62719ecfef6 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -69,6 +69,38 @@ MODULE_FIRMWARE(FIRMWARE_R520); * and others in some cases. */ +static bool r100_is_in_vblank(struct radeon_device *rdev, int crtc) +{ + if (crtc == 0) { + if (RREG32(RADEON_CRTC_STATUS) & RADEON_CRTC_VBLANK_CUR) + return true; + else + return false; + } else { + if (RREG32(RADEON_CRTC2_STATUS) & RADEON_CRTC2_VBLANK_CUR) + return true; + else + return false; + } +} + +static bool r100_is_counter_moving(struct radeon_device *rdev, int crtc) +{ + u32 vline1, vline2; + + if (crtc == 0) { + vline1 = (RREG32(RADEON_CRTC_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL; + vline2 = (RREG32(RADEON_CRTC_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL; + } else { + vline1 = (RREG32(RADEON_CRTC2_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL; + vline2 = (RREG32(RADEON_CRTC2_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL; + } + if (vline1 != vline2) + return true; + else + return false; +} + /** * r100_wait_for_vblank - vblank wait asic callback. * @@ -79,36 +111,33 @@ MODULE_FIRMWARE(FIRMWARE_R520); */ void r100_wait_for_vblank(struct radeon_device *rdev, int crtc) { - int i; + unsigned i = 0; if (crtc >= rdev->num_crtc) return; if (crtc == 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); - } - } + if (!(RREG32(RADEON_CRTC_GEN_CNTL) & RADEON_CRTC_EN)) + return; } 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); - } + if (!(RREG32(RADEON_CRTC2_GEN_CNTL) & RADEON_CRTC2_EN)) + return; + } + + /* depending on when we hit vblank, we may be close to active; if so, + * wait for another frame. + */ + while (r100_is_in_vblank(rdev, crtc)) { + if (i++ % 100 == 0) { + if (!r100_is_counter_moving(rdev, crtc)) + break; + } + } + + while (!r100_is_in_vblank(rdev, crtc)) { + if (i++ % 100 == 0) { + if (!r100_is_counter_moving(rdev, crtc)) + break; } } } |