[PATCH 1/3] radeon/cik: Fix GFX IB test on Big-Endian

[Christian König]

Patch #1 & #2 are Reviewed-by: Christian König <christian.koenig at amd.com>

For patch #3:

Couldn't we just in a loop go over all the dw in the IB and swap them 
after writing them? That would simplify the patch massively.

And line like the one below just look a bit odd to me:
>   	for (i = ib.length_dw; i < ib_size_dw; ++i)
> -		ib.ptr[i] = 0x0;
> +		ib.ptr[i] = cpu_to_le32(0x0);

Alternatively a helper function adding DW to an IB with swapping could 
do it as well.

Regards,
Christian.

On 04.12.2015 22:09, Oded Gabbay wrote:
> This patch makes the IB test on the GFX ring pass for CI-based cards
> installed in Big-Endian machines.
>
> Signed-off-by: Oded Gabbay <oded.gabbay at gmail.com>
> Cc: stable at vger.kernel.org
> ---
>   drivers/gpu/drm/radeon/cik.c | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
> index 248953d..05d43a0 100644
> --- a/drivers/gpu/drm/radeon/cik.c
> +++ b/drivers/gpu/drm/radeon/cik.c
> @@ -4173,11 +4173,7 @@ void cik_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
>   	control |= ib->length_dw | (vm_id << 24);
>   
>   	radeon_ring_write(ring, header);
> -	radeon_ring_write(ring,
> -#ifdef __BIG_ENDIAN
> -			  (2 << 0) |
> -#endif
> -			  (ib->gpu_addr & 0xFFFFFFFC));
> +	radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFFC));
>   	radeon_ring_write(ring, upper_32_bits(ib->gpu_addr) & 0xFFFF);
>   	radeon_ring_write(ring, control);
>   }