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radeon: Try harder to ensure we reclock in vblank

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The vblank interrupt on r600 doesn't seem to be especially reliable, so
perform some sanity checks before the actual reclock.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Matthew Garrett
2010-04-28 12:13:06 -04:00
committed by Dave Airlie
parent 612e06ce9c
commit f81f202402
4 changed files with 39 additions and 1 deletions
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26
drivers/gpu/drm/radeon/r600.c
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@@ -289,8 +289,34 @@ void r600_set_power_state(struct radeon_device *rdev, bool static_switch)
}
} else {
u32 position;
u32 vbl;
radeon_sync_with_vblank(rdev);
if (!radeon_pm_in_vbl(rdev))
return;
if (rdev->pm.active_crtcs & (1 << 0)) {
vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END);
position = RREG32(AVIVO_D1CRTC_STATUS_POSITION);
position &= 0xfff;
vbl &= 0xfff;
if (position < vbl && position > 1)
return;
}
if (rdev->pm.active_crtcs & (1 << 1)) {
vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END);
position = RREG32(AVIVO_D2CRTC_STATUS_POSITION);
position &= 0xfff;
vbl &= 0xfff;
if (position < vbl && position > 1)
return;
}
if (sclk != rdev->pm.current_sclk) {
radeon_pm_debug_check_in_vbl(rdev, false);
radeon_set_engine_clock(rdev, sclk);