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

[Alex Deucher]

Older firmware didn't support the new nop packet.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/cik.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 44d25da..80a7ce0 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 +8393,18 @@ static int cik_startup(struct radeon_device *rdev)
        }
        cik_irq_set(rdev);

+       if (rdev->family == CHIP_HAWAII) {
+               if (rdev->new_fw)
+                       nop = PACKET3(PACKET3_NOP, 0x3FFF);
+               else
+                       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 +8412,7 @@ 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 +8423,7 @@ 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 */
-- 
1.8.3.1