On Tue, Feb 10, 2015 at 8:26 AM, Christian König <deathsimple@xxxxxxxxxxx> wrote: > From: Christian König <christian.koenig@xxxxxxx> > > Emit the EOP twice to avoid cache flushing problems. > > Signed-off-by: Christian König <christian.koenig@xxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx Applied. Thanks! Alex > --- > drivers/gpu/drm/radeon/cik.c | 16 +++++++++++++++- > 1 file changed, 15 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c > index de77c27..5594416 100644 > --- a/drivers/gpu/drm/radeon/cik.c > +++ b/drivers/gpu/drm/radeon/cik.c > @@ -3905,7 +3905,21 @@ void cik_fence_gfx_ring_emit(struct radeon_device *rdev, > struct radeon_ring *ring = &rdev->ring[fence->ring]; > u64 addr = rdev->fence_drv[fence->ring].gpu_addr; > > - /* EVENT_WRITE_EOP - flush caches, send int */ > + /* Workaround for cache flush problems. First send a dummy EOP > + * event down the pipe with seq one below. > + */ > + radeon_ring_write(ring, PACKET3(PACKET3_EVENT_WRITE_EOP, 4)); > + radeon_ring_write(ring, (EOP_TCL1_ACTION_EN | > + EOP_TC_ACTION_EN | > + EVENT_TYPE(CACHE_FLUSH_AND_INV_TS_EVENT) | > + EVENT_INDEX(5))); > + radeon_ring_write(ring, addr & 0xfffffffc); > + radeon_ring_write(ring, (upper_32_bits(addr) & 0xffff) | > + DATA_SEL(1) | INT_SEL(0)); > + radeon_ring_write(ring, fence->seq - 1); > + radeon_ring_write(ring, 0); > + > + /* Then send the real EOP event down the pipe. */ > radeon_ring_write(ring, PACKET3(PACKET3_EVENT_WRITE_EOP, 4)); > radeon_ring_write(ring, (EOP_TCL1_ACTION_EN | > EOP_TC_ACTION_EN | > -- > 1.9.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
