[Intel-gfx] [PATCH 1/3] drm/i915: i915_gem_object_sync must handle NULL
When I extracted the synchronization code for implementing semaphorified pageflips (74f5f6e0), I neglected the non pipelined case which also calls this code. The modesetting code wants to make sure the object has finished rendering to the frame before configuring the scanout (ie. non-pipelined case). As a result of a follow on discussion on IRC, I've decided to add a comment about the function itself which received much inspiration from Chris as well. So really, this patch was ghost-written by Chris :). Reported-by: Chris Wilson ch...@chris-wilson.co.uk Signed-off-by: Ben Widawsky benjamin.widaw...@intel.com --- drivers/gpu/drm/i915/i915_gem.c | 14 +- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 1bfb0d2..9fcdc9a 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1953,6 +1953,18 @@ i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj) return 0; } +/** + * i915_gem_object_sync - sync an object to a ring. + * + * @obj: object which may be in use on another ring. + * @to: ring we wish to use the object on. May be NULL. + * + * This code is meant to abstract object synchronization with the GPU. + * Calling with NULL implies synchronizing the object with the CPU + * rather than a particular GPU ring. + * + * Returns 0 if successful, else propagates up the lower layer error. + */ int i915_gem_object_sync(struct drm_i915_gem_object *obj, struct intel_ring_buffer *to) @@ -1964,7 +1976,7 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj, if (from == NULL || to == from) return 0; - if (!i915_semaphore_is_enabled(obj-base.dev)) + if (to == NULL || !i915_semaphore_is_enabled(obj-base.dev)) return i915_gem_object_wait_rendering(obj); idx = intel_ring_sync_index(from, to); -- 1.7.10 ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 1/3] drm/i915: i915_gem_object_sync must handle NULL
On Wed, 11 Apr 2012 11:18:19 -0700, Ben Widawsky b...@bwidawsk.net wrote: When I extracted the synchronization code for implementing semaphorified pageflips (74f5f6e0), I neglected the non pipelined case which also calls this code. The modesetting code wants to make sure the object has finished rendering to the frame before configuring the scanout (ie. non-pipelined case). As a result of a follow on discussion on IRC, I've decided to add a comment about the function itself which received much inspiration from Chris as well. So really, this patch was ghost-written by Chris :). Reported-by: Chris Wilson ch...@chris-wilson.co.uk Signed-off-by: Ben Widawsky benjamin.widaw...@intel.com Reviewed-by: Chris Wilson ch...@chris-wilson.co.uk Tested-by: Chris Wilson ch...@chris-wilson.co.uk -Chris -- Chris Wilson, Intel Open Source Technology Centre ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 1/3] drm/i915: i915_gem_object_sync must handle NULL
On Wed, Apr 11, 2012 at 07:41:04PM +0100, Chris Wilson wrote: On Wed, 11 Apr 2012 11:18:19 -0700, Ben Widawsky b...@bwidawsk.net wrote: When I extracted the synchronization code for implementing semaphorified pageflips (74f5f6e0), I neglected the non pipelined case which also calls this code. The modesetting code wants to make sure the object has finished rendering to the frame before configuring the scanout (ie. non-pipelined case). As a result of a follow on discussion on IRC, I've decided to add a comment about the function itself which received much inspiration from Chris as well. So really, this patch was ghost-written by Chris :). Reported-by: Chris Wilson ch...@chris-wilson.co.uk Signed-off-by: Ben Widawsky benjamin.widaw...@intel.com Reviewed-by: Chris Wilson ch...@chris-wilson.co.uk Tested-by: Chris Wilson ch...@chris-wilson.co.uk I've picked up all 3 patches for -next, thanks for them. -Daniel -- Daniel Vetter Mail: dan...@ffwll.ch Mobile: +41 (0)79 365 57 48 ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
