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authorGustavo Padovan <gustavo.padovan@collabora.co.uk>2016-11-15 23:37:08 +0900
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-11-16 10:42:48 +0100
commit6d6003c4b613c93973e4e870d83f4bed2ad9ac34 (patch)
tree8486cf846810b3065cdf28be5784fd7712697fa1
parent9626014258a5957ff120b3987ee72decdbe0c798 (diff)
drm/fence: add fence timeline to drm_crtc
Create one timeline context for each CRTC to be able to handle out-fences and signal them. It adds a few members to struct drm_crtc: fence_context, where we store the context we get from fence_context_alloc(), the fence seqno and the fence lock, that we pass in fence_init() to be used by the fence. v2: Comment by Daniel Stone: - add BUG_ON() to fence_to_crtc() macro v3: Comment by Ville Syrjälä - Use more meaningful name as crtc timeline name v4: Comments by Brian Starkey - Use even more meaninful name for the crtc timeline - add doc for timeline_name Comment by Daniel Vetter - use in-line style for comments - rebase after fence -> dma_fence rename v5: Comment by Daniel Vetter - Add doc for drm_crtc_fence_ops v6: Comment by Chris Wilson - Move fence_to_crtc to drm_crtc.c - Move export of drm_crtc_fence_ops to drm_crtc_internal.h - rebase against latest drm-misc Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v5) Reviewed-by: Sean Paul <seanpaul@chromium.org> (v5) Tested-by: Robert Foss <robert.foss@collabora.com> (v5) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1479220628-10204-1-git-send-email-gustavo@padovan.org
-rw-r--r--drivers/gpu/drm/drm_crtc.c38
-rw-r--r--drivers/gpu/drm/drm_crtc_internal.h2
-rw-r--r--include/drm/drm_crtc.h29
3 files changed, 69 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 159458b..dbfae42 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -33,6 +33,7 @@
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/dma-fence.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
@@ -151,6 +152,38 @@ static void drm_crtc_crc_fini(struct drm_crtc *crtc)
#endif
}
+static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
+{
+ BUG_ON(fence->ops != &drm_crtc_fence_ops);
+ return container_of(fence->lock, struct drm_crtc, fence_lock);
+}
+
+static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence)
+{
+ struct drm_crtc *crtc = fence_to_crtc(fence);
+
+ return crtc->dev->driver->name;
+}
+
+static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence)
+{
+ struct drm_crtc *crtc = fence_to_crtc(fence);
+
+ return crtc->timeline_name;
+}
+
+static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence)
+{
+ return true;
+}
+
+const struct dma_fence_ops drm_crtc_fence_ops = {
+ .get_driver_name = drm_crtc_fence_get_driver_name,
+ .get_timeline_name = drm_crtc_fence_get_timeline_name,
+ .enable_signaling = drm_crtc_fence_enable_signaling,
+ .wait = dma_fence_default_wait,
+};
+
/**
* drm_crtc_init_with_planes - Initialise a new CRTC object with
* specified primary and cursor planes.
@@ -208,6 +241,11 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
return -ENOMEM;
}
+ crtc->fence_context = dma_fence_context_alloc(1);
+ spin_lock_init(&crtc->fence_lock);
+ snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
+ "CRTC:%d-%s", crtc->base.id, crtc->name);
+
crtc->base.properties = &crtc->properties;
list_add_tail(&crtc->head, &config->crtc_list);
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index f78d5aa..33b17d0 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -43,6 +43,8 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
int drm_crtc_register_all(struct drm_device *dev);
void drm_crtc_unregister_all(struct drm_device *dev);
+extern const struct dma_fence_ops drm_crtc_fence_ops;
+
/* IOCTLs */
int drm_mode_getcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index bcc1a4d..946672f 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -731,6 +731,35 @@ struct drm_crtc {
*/
struct drm_crtc_crc crc;
#endif
+
+ /**
+ * @fence_context:
+ *
+ * timeline context used for fence operations.
+ */
+ unsigned int fence_context;
+
+ /**
+ * @fence_lock:
+ *
+ * spinlock to protect the fences in the fence_context.
+ */
+
+ spinlock_t fence_lock;
+ /**
+ * @fence_seqno:
+ *
+ * Seqno variable used as monotonic counter for the fences
+ * created on the CRTC's timeline.
+ */
+ unsigned long fence_seqno;
+
+ /**
+ * @timeline_name:
+ *
+ * The name of the CRTC's fence timeline.
+ */
+ char timeline_name[32];
};
/**