From: Rob Clark <rob@xxxxxx>
Use atomic properties mechanism for CRTC page_flip. This by itself
doesn't accomplish anything, but it avoids having multiple code
paths to do the same thing when nuclear-pageflip and atomic-modeset
are introduced.
---
drivers/gpu/drm/drm_crtc.c | 167 ++++++++++++++++++++++++++++++++++----------
1 file changed, 130 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 63365f0..bcdd6be 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -441,9 +441,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
struct drm_mode_config *config = &dev->mode_config;
struct drm_crtc *crtc;
struct drm_plane *plane;
- struct drm_mode_set set;
void *state;
- int ret;
if (!dev_supports_atomic(dev)) {
drm_framebuffer_remove_legacy(fb);
@@ -460,12 +458,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (crtc->fb == fb) {
/* should turn off the crtc */
- memset(&set, 0, sizeof(struct drm_mode_set));
- set.crtc = crtc;
- set.fb = NULL;
- ret = crtc->funcs->set_config(&set);
- if (ret)
- DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
+ drm_mode_crtc_set_obj_prop(crtc, state, config->prop_fb_id, 0);
}
}
@@ -508,6 +501,7 @@ EXPORT_SYMBOL(drm_framebuffer_remove);
int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
const struct drm_crtc_funcs *funcs)
{
+ struct drm_mode_config *config = &dev->mode_config;
int ret;
crtc->dev = dev;
@@ -526,6 +520,13 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
dev->mode_config.num_crtc++;
+ if (!dev_supports_atomic(dev))
+ goto out;
+
+ drm_object_attach_property(&crtc->base, config->prop_fb_id, 0);
+ drm_object_attach_property(&crtc->base, config->prop_crtc_x, 0);
+ drm_object_attach_property(&crtc->base, config->prop_crtc_y, 0);
+
out:
mutex_unlock(&dev->mode_config.mutex);
@@ -3960,7 +3961,53 @@ out:
return ret;
}
-int drm_mode_page_flip_ioctl(struct drm_device *dev,
+static struct drm_pending_vblank_event *create_vblank_event(
+ struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
+{
+ struct drm_pending_vblank_event *e = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ if (file_priv->event_space < sizeof e->event) {
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+ file_priv->event_space -= sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ e = kzalloc(sizeof *e, GFP_KERNEL);
+ if (e == NULL) {
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+
+ e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
+ e->event.base.length = sizeof e->event;
+ e->event.user_data = user_data;
+ e->base.event = &e->event.base;
+ e->base.file_priv = file_priv;
+ e->base.destroy =
+ (void (*) (struct drm_pending_event *)) kfree;
+
+out:
+ return e;
+}
+
+static void destroy_vblank_event(struct drm_device *dev,
+ struct drm_file *file_priv, struct drm_pending_vblank_event *e)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof e->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ kfree(e);
+}
+
+/* Legacy version.. remove when all drivers converted to 'atomic' API */
+static int drm_mode_page_flip_ioctl_legacy(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_crtc_page_flip *page_flip = data;
@@ -3968,7 +4015,6 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
struct drm_crtc *crtc;
struct drm_framebuffer *fb;
struct drm_pending_vblank_event *e = NULL;
- unsigned long flags;
int hdisplay, vdisplay;
int ret = -EINVAL;
@@ -4017,43 +4063,90 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
}
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
- ret = -ENOMEM;
- spin_lock_irqsave(&dev->event_lock, flags);
- if (file_priv->event_space < sizeof e->event) {
- spin_unlock_irqrestore(&dev->event_lock, flags);
+ e = create_vblank_event(dev, file_priv, page_flip->user_data);
+ if (!e) {
+ ret = -ENOMEM;
goto out;
}
- file_priv->event_space -= sizeof e->event;
- spin_unlock_irqrestore(&dev->event_lock, flags);
+ }
- e = kzalloc(sizeof *e, GFP_KERNEL);
- if (e == NULL) {
- spin_lock_irqsave(&dev->event_lock, flags);
- file_priv->event_space += sizeof e->event;
- spin_unlock_irqrestore(&dev->event_lock, flags);
- goto out;
- }
+ ret = crtc->funcs->page_flip(crtc, fb, e);
+ if (ret && e)
+ destroy_vblank_event(dev, file_priv, e);
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+int drm_mode_page_flip_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc_page_flip *page_flip = data;
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_mode_object *obj;
+ struct drm_crtc *crtc;
+ struct drm_pending_vblank_event *e = NULL;
+ void *state;
+ int ret = -EINVAL;
+
+ if (!dev_supports_atomic(dev))
+ return drm_mode_page_flip_ioctl_legacy(dev, data, file_priv);
+
+ if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
+ page_flip->reserved != 0)
+ return -EINVAL;
- e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
- e->event.base.length = sizeof e->event;
- e->event.user_data = page_flip->user_data;
- e->base.event = &e->event.base;
- e->base.file_priv = file_priv;
- e->base.destroy =
- (void (*) (struct drm_pending_event *)) kfree;
+ mutex_lock(&dev->mode_config.mutex);
+
+ obj = drm_mode_object_find(dev, page_flip->crtc_id,
+ DRM_MODE_OBJECT_CRTC);
+ if (!obj) {
+ DRM_DEBUG_KMS("Unknown CRTC ID %d\n", page_flip->crtc_id);
+ ret = -ENOENT;
+ goto out_unlock;
}
+ crtc = obj_to_crtc(obj);
- ret = crtc->funcs->page_flip(crtc, fb, e);
- if (ret) {
- if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
- spin_lock_irqsave(&dev->event_lock, flags);
- file_priv->event_space += sizeof e->event;
- spin_unlock_irqrestore(&dev->event_lock, flags);
- kfree(e);
+ state = dev->driver->atomic_begin(dev, crtc);
+ if (IS_ERR(state)) {
+ ret = PTR_ERR(state);
+ goto out_unlock;
+ }
+
+ if (crtc->fb == NULL) {
+ /* The framebuffer is currently unbound, presumably
+ * due to a hotplug event, that userspace has not
+ * yet discovered.
+ */
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
+ e = create_vblank_event(dev, file_priv, page_flip->user_data);
+ if (!e) {
+ ret = -ENOMEM;
+ goto out;
}
}
+ ret = drm_mode_set_obj_prop(obj, state,
+ config->prop_fb_id, page_flip->fb_id);
+ if (ret)
+ goto out;
+
+ ret = dev->driver->atomic_check(dev, state);
+ if (ret)
+ goto out;
+
+ ret = dev->driver->atomic_commit(dev, state, e);
+ if (ret && e)
+ destroy_vblank_event(dev, file_priv, e);
+
out:
+ dev->driver->atomic_end(dev, state);
+out_unlock:
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
--
1.7.9.5
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