Re: [PATCH] drm/i915: Skip fence installation for objects with rotated views (v3)

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Wed, Oct 28, 2015 at 06:24:19PM -0700, Vivek Kasireddy wrote:
> While pinning a fb object to the display plane, only install a fence
> if the object is using a normal view. This corresponds with the
> behavior found in i915_gem_object_do_pin() where the fencability
> criteria is determined only for objects with normal views.
> 
> v2:
> Look at the object's map_and_fenceable flag to determine whether to
> install a fence or not (Chris).
> 
> v3:
> Pin and unpin a fence only if the current view type is normal.
> 
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
> Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 2fdfca1..ac06f8c 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2419,7 +2419,8 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
>  	 * framebuffer compression.  For simplicity, we always install
>  	 * a fence as the cost is not that onerous.
>  	 */
> -	ret = i915_gem_object_get_fence(obj);
> +	if (view.type == I915_GGTT_VIEW_NORMAL)
> +		ret = i915_gem_object_get_fence(obj);

Missing the same check for the pin_fence().

>  	if (ret == -EDEADLK) {
>  		/*
>  		 * -EDEADLK means there are no free fences
> @@ -2460,7 +2461,9 @@ static void intel_unpin_fb_obj(struct drm_framebuffer *fb,
>  	ret = intel_fill_fb_ggtt_view(&view, fb, plane_state);
>  	WARN_ONCE(ret, "Couldn't get view from plane state!");
>  
> -	i915_gem_object_unpin_fence(obj);
> +	if (view.type == I915_GGTT_VIEW_NORMAL)
> +		i915_gem_object_unpin_fence(obj);
> +
>  	i915_gem_object_unpin_from_display_plane(obj, &view);
>  }
>  
> -- 
> 2.4.3

-- 
Ville Syrjälä
Intel OTC
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