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drm/atomic: Move drm_crtc_commit to drm_crtc_state, v4.

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Most code only cares about the current commit or previous commit.
Fortuantely we already have a place to track those. Move it to
drm_crtc_state where it belongs. :)

The per-crtc commit_list is kept for places where we have to look
deeper than the current or previous commit for checking whether to stall
on unpin. This is used in drm_atomic_helper_setup_commit and
intel_has_pending_fb_unpin.

Changes since v1:
- Update kerneldoc for drm_crtc.commit_list. (danvet)
Changes since v2:
- Remove drm_atomic_helper_async_check hunk. (pinchartl)
Changes since v3:
- Fix use-after-free in drm_atomic_helper_commit_cleanup_done().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170904150456.31049-1-maarten.lankhorst@linux.intel.com
[mlankhorst: preceeding -> preceding (checkpatch)]
This commit is contained in:
Maarten Lankhorst
2017-09-04 17:04:56 +02:00
parent f46640b931
commit 163bcc2c74
4 changed files with 54 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
drivers/gpu/drm/drm_atomic_helper.c
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@@ -1262,12 +1262,12 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
struct drm_atomic_state *old_state)
{
struct drm_crtc_state *unused;
struct drm_crtc_state *new_crtc_state;
struct drm_crtc *crtc;
int i;
for_each_new_crtc_in_state(old_state, crtc, unused, i) {
struct drm_crtc_commit *commit = old_state->crtcs[i].commit;
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
struct drm_crtc_commit *commit = new_crtc_state->commit;
int ret;
if (!commit)
@@ -1730,7 +1730,7 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
kref_init(&commit->ref);
commit->crtc = crtc;
state->crtcs[i].commit = commit;
new_crtc_state->commit = commit;
ret = stall_checks(crtc, nonblock);
if (ret)
@@ -1768,22 +1768,6 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
}
EXPORT_SYMBOL(drm_atomic_helper_setup_commit);
static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc)
{
struct drm_crtc_commit *commit;
int i = 0;
list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
/* skip the first entry, that's the current commit */
if (i == 1)
return commit;
i++;
}
return NULL;
}
/**
* drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits
* @old_state: atomic state object with old state structures
@@ -1799,17 +1783,13 @@ static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc)
void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *new_crtc_state;
struct drm_crtc_state *old_crtc_state;
struct drm_crtc_commit *commit;
int i;
long ret;
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
spin_lock(&crtc->commit_lock);
commit = preceeding_commit(crtc);
if (commit)
drm_crtc_commit_get(commit);
spin_unlock(&crtc->commit_lock);
for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
commit = old_crtc_state->commit;
if (!commit)
continue;
@@ -1827,8 +1807,6 @@ void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state)
if (ret == 0)
DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
crtc->base.id, crtc->name);
drm_crtc_commit_put(commit);
}
}
EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
@@ -1851,15 +1829,25 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *new_crtc_state;
struct drm_crtc_state *old_crtc_state, *new_crtc_state;
struct drm_crtc_commit *commit;
int i;
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
commit = old_state->crtcs[i].commit;
for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
commit = new_crtc_state->commit;
if (!commit)
continue;
/*
* copy new_crtc_state->commit to old_crtc_state->commit,
* it's unsafe to touch new_crtc_state after hw_done,
* but we still need to do so in cleanup_done().
*/
if (old_crtc_state->commit)
drm_crtc_commit_put(old_crtc_state->commit);
old_crtc_state->commit = drm_crtc_commit_get(commit);
/* backend must have consumed any event by now */
WARN_ON(new_crtc_state->event);
complete_all(&commit->hw_done);
@@ -1881,13 +1869,13 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *new_crtc_state;
struct drm_crtc_state *old_crtc_state;
struct drm_crtc_commit *commit;
int i;
long ret;
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
commit = old_state->crtcs[i].commit;
for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
commit = old_crtc_state->commit;
if (WARN_ON(!commit))
continue;
@@ -2293,20 +2281,13 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
struct drm_private_state *old_obj_state, *new_obj_state;
if (stall) {
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
spin_lock(&crtc->commit_lock);
commit = list_first_entry_or_null(&crtc->commit_list,
struct drm_crtc_commit, commit_entry);
if (commit)
drm_crtc_commit_get(commit);
spin_unlock(&crtc->commit_lock);
for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
commit = old_crtc_state->commit;
if (!commit)
continue;
ret = wait_for_completion_interruptible(&commit->hw_done);
drm_crtc_commit_put(commit);
if (ret)
return ret;
}
@@ -2331,13 +2312,13 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
state->crtcs[i].state = old_crtc_state;
crtc->state = new_crtc_state;
if (state->crtcs[i].commit) {
if (new_crtc_state->commit) {
spin_lock(&crtc->commit_lock);
list_add(&state->crtcs[i].commit->commit_entry,
list_add(&new_crtc_state->commit->commit_entry,
&crtc->commit_list);
spin_unlock(&crtc->commit_lock);
state->crtcs[i].commit->event = NULL;
new_crtc_state->commit->event = NULL;
}
}
@@ -3171,6 +3152,7 @@ void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
state->connectors_changed = false;
state->color_mgmt_changed = false;
state->zpos_changed = false;
state->commit = NULL;
state->event = NULL;
state->pageflip_flags = 0;
}
@@ -3209,6 +3191,12 @@ EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
*/
void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
{
if (state->commit) {
kfree(state->commit->event);
state->commit->event = NULL;
drm_crtc_commit_put(state->commit);
}
drm_property_blob_put(state->mode_blob);
drm_property_blob_put(state->degamma_lut);
drm_property_blob_put(state->ctm);