[PATCH 053/165] drm/radeon/cik: switch to type3 nop packet for compute rings

[Jerome Glisse]

On Wed, Jun 26, 2013 at 09:22:13AM -0400, alexdeucher at gmail.com wrote:
> From: Alex Deucher <alexander.deucher at amd.com>
> 
> Type 2 packets are deprecated on CIK MEC and we should use
> type 3 nop packets.  Setting the count field to the max value
> (0x3fff) indicates that only one dword should be skipped
> like a type 2 packet.
> 
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

What about adding same comment in the code and not only in git commit
message.

Reviewed-by: Jerome Glisse <jglisse at redhat.com>

> ---
>  drivers/gpu/drm/radeon/cik.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
> index 9d2d6bb..08dc4c2 100644
> --- a/drivers/gpu/drm/radeon/cik.c
> +++ b/drivers/gpu/drm/radeon/cik.c
> @@ -5470,7 +5470,7 @@ static int cik_startup(struct radeon_device *rdev)
>  	ring = &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX];
>  	r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP1_RPTR_OFFSET,
>  			     CP_HQD_PQ_RPTR, CP_HQD_PQ_WPTR,
> -			     0, 0xfffff, RADEON_CP_PACKET2);
> +			     0, 0xfffff, PACKET3(PACKET3_NOP, 0x3FFF));
>  	if (r)
>  		return r;
>  	ring->me = 1; /* first MEC */
> @@ -5484,7 +5484,7 @@ static int cik_startup(struct radeon_device *rdev)
>  	ring = &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX];
>  	r = radeon_ring_init(rdev, ring, ring->ring_size, RADEON_WB_CP2_RPTR_OFFSET,
>  			     CP_HQD_PQ_RPTR, CP_HQD_PQ_WPTR,
> -			     0, 0xffffffff, RADEON_CP_PACKET2);
> +			     0, 0xffffffff, PACKET3(PACKET3_NOP, 0x3FFF));
>  	if (r)
>  		return r;
>  	/* dGPU only have 1 MEC */
> -- 
> 1.7.7.5
> 
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