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Commit b6c2b4fa authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon: only use me/pfp sync on evergreen+ 

The packet seems to cause hangs on some 7xx asics.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=83616



Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 68c78bd6

drivers/gpu/drm/radeon/r600.c

+2 −2
Original line number Diff line number Diff line
@@ -2769,8 +2769,8 @@ bool r600_semaphore_ring_emit(struct radeon_device *rdev, 
	radeon_ring_write(ring, lower_32_bits(addr));

	radeon_ring_write(ring, (upper_32_bits(addr) & 0xff) | sel);



	/* PFP_SYNC_ME packet only exists on 7xx+ */

	if (emit_wait && (rdev->family >= CHIP_RV770)) {

	/* PFP_SYNC_ME packet only exists on 7xx+, only enable it on eg+ */

	if (emit_wait && (rdev->family >= CHIP_CEDAR)) {

		/* Prevent the PFP from running ahead of the semaphore wait */

		radeon_ring_write(ring, PACKET3(PACKET3_PFP_SYNC_ME, 0));

		radeon_ring_write(ring, 0x0);