From b6c2b4faf90230ef9cf1a81f36cbccda4a606c59 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 8 Sep 2014 13:16:39 -0400 Subject: [PATCH] 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: Alex Deucher --- drivers/gpu/drm/radeon/r600.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index e616eb5f6e7a..3cfb50056f7a 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -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); -- 2.20.1