[Intel-gfx] [PATCH 2/3] [v2] drm/i915/bdw: Render ring PDP is restored with context

[Ben Widawsky]

On Tue, Apr 01, 2014 at 05:43:06PM -0700, Ben Widawsky wrote:
> So let's not do it every time we switch.
> 
> v2: v1 skipped the switch for all gens. We still need it pre-gen8.
> 
> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>

Please ignore this patch. I actually need to rework some stuff. 1 and 3
are still good though.

> ---
>  drivers/gpu/drm/i915/i915_gem_context.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> index 0e8fd1e..3b5b8ab 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -710,7 +710,8 @@ static int do_switch(struct intel_ring_buffer *ring,
>  	if (ret)
>  		goto unpin_out;
>  
> -	if (USES_FULL_PPGTT(ring->dev)) {
> +	if (USES_FULL_PPGTT(ring->dev) &&
> +	    (!IS_GEN8(ring->dev) || !to->is_initialized)) {
>  		ret = ppgtt->switch_mm(ppgtt, ring, false);
>  		/* The hardware context switch is emitted, but we haven't
>  		 * actually changed the state - so it's probably safe to bail
> -- 
> 1.9.1
> 
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-- 
Ben Widawsky, Intel Open Source Technology Center