Commit 17efca93 authored by Dave Airlie's avatar Dave Airlie
Browse files

Merge tag 'topic/drm-misc-2016-03-22' of git://anongit.freedesktop.org/drm-intel into drm-next 

Bunch of small fixupes all over. Plus a dma-buf patch that Sumit asked me
to cherry-pick since that's the only one he had in his tree.

There's a sparse issue outstanding in the color mgr stuff, but Lionel is
still working on something that actually appeases sparse.

* tag 'topic/drm-misc-2016-03-22' of git://anongit.freedesktop.org/drm-intel:
  dma-buf/fence: fix fence_is_later v2
  dma-buf: Update docs for SYNC ioctl
  drm: remove excess description
  dma-buf, drm, ion: Propagate error code from dma_buf_start_cpu_access()
  drm/atmel-hlcdc: use helper to get crtc state
  drm/atomic: use helper to get crtc state
parents 568d7c76 b47bcb93

Documentation/dma-buf-sharing.txt

+6 −5
Original line number Diff line number Diff line
@@ -352,7 +352,8 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: 


   No special interfaces, userspace simply calls mmap on the dma-buf fd, making

   sure that the cache synchronization ioctl (DMA_BUF_IOCTL_SYNC) is *always*

   used when the access happens. This is discussed next paragraphs.

   used when the access happens. Note that DMA_BUF_IOCTL_SYNC can fail with

   -EAGAIN or -EINTR, in which case it must be restarted.



   Some systems might need some sort of cache coherency management e.g. when

   CPU and GPU domains are being accessed through dma-buf at the same time. To
@@ -366,10 +367,10 @@ Being able to mmap an export dma-buf buffer object has 2 main use-cases: 
       want (with the new data being consumed by the GPU or say scanout device)

     - munmap once you don't need the buffer any more



    Therefore, for correctness and optimal performance, systems with the memory

    cache shared by the GPU and CPU i.e. the "coherent" and also the

    "incoherent" are always required to use SYNC_START and SYNC_END before and

    after, respectively, when accessing the mapped address.

    For correctness and optimal performance, it is always required to use

    SYNC_START and SYNC_END before and after, respectively, when accessing the

    mapped address. Userspace cannot rely on coherent access, even when there

    are systems where it just works without calling these ioctls.



2. Supporting existing mmap interfaces in importers

drivers/dma-buf/dma-buf.c

+12 −7
Original line number Diff line number Diff line
@@ -259,6 +259,7 @@ static long dma_buf_ioctl(struct file *file, 
	struct dma_buf *dmabuf;

	struct dma_buf_sync sync;

	enum dma_data_direction direction;

	int ret;



	dmabuf = file->private_data;
@@ -285,11 +286,11 @@ static long dma_buf_ioctl(struct file *file, 
		}



		if (sync.flags & DMA_BUF_SYNC_END)

			dma_buf_end_cpu_access(dmabuf, direction);

			ret = dma_buf_end_cpu_access(dmabuf, direction);

		else

			dma_buf_begin_cpu_access(dmabuf, direction);

			ret = dma_buf_begin_cpu_access(dmabuf, direction);



		return 0;

		return ret;

	default:

		return -ENOTTY;

	}
@@ -611,15 +612,19 @@ EXPORT_SYMBOL_GPL(dma_buf_begin_cpu_access); 
 * @dmabuf:	[in]	buffer to complete cpu access for.

 * @direction:	[in]	length of range for cpu access.

 *

 * This call must always succeed.

 * Can return negative error values, returns 0 on success.

 */

void dma_buf_end_cpu_access(struct dma_buf *dmabuf,

int dma_buf_end_cpu_access(struct dma_buf *dmabuf,

			   enum dma_data_direction direction)

{

	int ret = 0;



	WARN_ON(!dmabuf);



	if (dmabuf->ops->end_cpu_access)

		dmabuf->ops->end_cpu_access(dmabuf, direction);

		ret = dmabuf->ops->end_cpu_access(dmabuf, direction);



	return ret;

}

EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access);

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c

+1 −1
Original line number Diff line number Diff line
@@ -558,7 +558,7 @@ static int atmel_hlcdc_plane_atomic_check(struct drm_plane *p, 
	if (!state->base.crtc || !fb)

		return 0;



	crtc_state = s->state->crtc_states[drm_crtc_index(s->crtc)];

	crtc_state = drm_atomic_get_existing_crtc_state(s->state, s->crtc);

	mode = &crtc_state->adjusted_mode;



	state->src_x = s->src_x;

drivers/gpu/drm/drm_atomic.c

+0 −1
Original line number Diff line number Diff line
@@ -380,7 +380,6 @@ EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); 
 * drm_atomic_replace_property_blob - replace a blob property

 * @blob: a pointer to the member blob to be replaced

 * @new_blob: the new blob to replace with

 * @expected_size: the expected size of the new blob

 * @replaced: whether the blob has been replaced

 *

 * RETURNS:

drivers/gpu/drm/drm_atomic_helper.c

+8 −6
Original line number Diff line number Diff line
@@ -67,7 +67,8 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state, 
	struct drm_crtc_state *crtc_state;



	if (plane->state->crtc) {

		crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)];

		crtc_state = drm_atomic_get_existing_crtc_state(state,

								plane->state->crtc);



		if (WARN_ON(!crtc_state))

			return;
@@ -76,8 +77,8 @@ drm_atomic_helper_plane_changed(struct drm_atomic_state *state, 
	}



	if (plane_state->crtc) {

		crtc_state =

			state->crtc_states[drm_crtc_index(plane_state->crtc)];

		crtc_state = drm_atomic_get_existing_crtc_state(state,

								plane_state->crtc);



		if (WARN_ON(!crtc_state))

			return;
@@ -374,8 +375,8 @@ mode_fixup(struct drm_atomic_state *state) 
		if (!conn_state->crtc || !conn_state->best_encoder)

			continue;



		crtc_state =

			state->crtc_states[drm_crtc_index(conn_state->crtc)];

		crtc_state = drm_atomic_get_existing_crtc_state(state,

								conn_state->crtc);



		/*

		 * Each encoder has at most one connector (since we always steal
@@ -679,7 +680,8 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) 
		if (!old_conn_state->crtc)

			continue;



		old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)];

		old_crtc_state = drm_atomic_get_existing_crtc_state(old_state,

								    old_conn_state->crtc);



		if (!old_crtc_state->active ||

		    !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))

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