On Fri, Sep 18, 2015 at 06:57:48PM -0700, Vivek Kasireddy wrote:
> v2:
> Look at the object's map_and_fenceable flag to determine whether to
> install a fence or not (Chris).
>
> v1:
> 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.
>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Where's the igt testcase for this bug that Tvrtko suggested?
-Daniel
> ---
> drivers/gpu/drm/i915/intel_display.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 52fb3f2..108c000 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2357,7 +2357,8 @@ 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 (obj->map_and_fenceable)
> + ret = i915_gem_object_get_fence(obj);
> if (ret == -EDEADLK) {
> /*
> * -EDEADLK means there are no free fences
> --
> 2.4.3
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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