drm/radeon: use packet2 for nop on hawaii with old firmware

Older firmware didn't support the new nop packet.

v2 (Andreas Boll):
 - Drop usage of packet3 for new firmware

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com> (v1)
Signed-off-by: Andreas Boll <andreas.boll.dev@gmail.com>
Cc: stable@vger.kernel.org

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index afdfe04a9290..2cb507ab0b7c 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -8259,6 +8259,7 @@ restart_ih:
 static int cik_startup(struct radeon_device *rdev)
 {
         struct radeon_ring *ring;
+        u32 nop;
         int r;
 
         /* enable pcie gen2/3 link */
@@ -8392,9 +8393,15 @@ static int cik_startup(struct radeon_device *rdev)
         }
         cik_irq_set(rdev);
 
+        if (rdev->family == CHIP_HAWAII) {
+                nop = RADEON_CP_PACKET2;
+        } else {
+                nop = PACKET3(PACKET3_NOP, 0x3FFF);
+        }
+
         ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
         r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP_RPTR_OFFSET,
-                             PACKET3(PACKET3_NOP, 0x3FFF));
+                             nop);
         if (r)
                 return r;
 
@@ -8402,7 +8409,7 @@ static int cik_startup(struct radeon_device *rdev)
         /* type-2 packets are deprecated on MEC, use type-3 instead */
         ring = &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX];
         r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP1_RPTR_OFFSET,
-                             PACKET3(PACKET3_NOP, 0x3FFF));
+                             nop);
         if (r)
                 return r;
         ring->me = 1; /* first MEC */
@@ -8413,7 +8420,7 @@ static int cik_startup(struct radeon_device *rdev)
         /* type-2 packets are deprecated on MEC, use type-3 instead */
         ring = &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX];
         r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP2_RPTR_OFFSET,
-                             PACKET3(PACKET3_NOP, 0x3FFF));
+                             nop);
         if (r)
                 return r;
         /* dGPU only have 1 MEC */