[Intel-gfx] [PATCH 8/9] drm: Reduce the amount of dev->vblank[crtc] in the code
ville.syrjala at linux.intel.com
ville.syrjala at linux.intel.com
Mon May 26 13:46:31 CEST 2014
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
Declare a local struct drm_vblank_crtc * and use that
instead of having to do dig it out via 'dev->vblank[crtc]'
everywhere.
Performed with the following coccinelle incantation,
and a few manual whitespace cleanups:
@@
identifier func,member;
expression num_crtcs;
struct drm_device *dev;
unsigned int crtc;
@@
func (...) {
+ struct drm_vblank_crtc *vblank;
...
if (crtc >= num_crtcs)
return ...;
+ vblank = &dev->vblank[crtc];
<+...
(
- dev->vblank[crtc].member
+ vblank->member
|
- &(dev->vblank[crtc])
+ vblank
)
...+>
}
@@
struct drm_device *dev;
int crtc;
identifier member;
expression num_crtcs;
@@
for (crtc = 0; crtc < num_crtcs; crtc++) {
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
+
<+...
(
- dev->vblank[crtc].member
+ vblank->member
|
- &(dev->vblank[crtc])
+ vblank
)
...+>
}
@@
identifier func,member;
@@
func (struct drm_device *dev, int crtc, ...) {
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
<+...
(
- dev->vblank[crtc].member
+ vblank->member
|
- &(dev->vblank[crtc])
+ vblank
)
...+>
}
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/drm_irq.c | 136 +++++++++++++++++++++++++++-------------------
1 file changed, 80 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 54a56b2..20a4855 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -73,6 +73,7 @@
*/
static void drm_update_vblank_count(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
u32 cur_vblank, diff, tslot, rc;
struct timeval t_vblank;
@@ -94,12 +95,12 @@ static void drm_update_vblank_count(struct drm_device *dev, int crtc)
} while (cur_vblank != dev->driver->get_vblank_counter(dev, crtc));
/* Deal with counter wrap */
- diff = cur_vblank - dev->vblank[crtc].last;
- if (cur_vblank < dev->vblank[crtc].last) {
+ diff = cur_vblank - vblank->last;
+ if (cur_vblank < vblank->last) {
diff += dev->max_vblank_count;
DRM_DEBUG("last_vblank[%d]=0x%x, cur_vblank=0x%x => diff=0x%x\n",
- crtc, dev->vblank[crtc].last, cur_vblank, diff);
+ crtc, vblank->last, cur_vblank, diff);
}
DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n",
@@ -110,12 +111,12 @@ static void drm_update_vblank_count(struct drm_device *dev, int crtc)
* reinitialize delayed at next vblank interrupt in that case.
*/
if (rc) {
- tslot = atomic_read(&dev->vblank[crtc].count) + diff;
+ tslot = atomic_read(&vblank->count) + diff;
vblanktimestamp(dev, crtc, tslot) = t_vblank;
}
smp_mb__before_atomic_inc();
- atomic_add(diff, &dev->vblank[crtc].count);
+ atomic_add(diff, &vblank->count);
smp_mb__after_atomic_inc();
}
@@ -127,6 +128,7 @@ static void drm_update_vblank_count(struct drm_device *dev, int crtc)
*/
static void vblank_disable_and_save(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
unsigned long irqflags;
u32 vblcount;
s64 diff_ns;
@@ -147,14 +149,14 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
* count account for the entire time between drm_vblank_on() and
* drm_vblank_off().
*/
- if (!dev->vblank[crtc].enabled) {
+ if (!vblank->enabled) {
drm_update_vblank_count(dev, crtc);
spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags);
return;
}
dev->driver->disable_vblank(dev, crtc);
- dev->vblank[crtc].enabled = false;
+ vblank->enabled = false;
/* No further vblank irq's will be processed after
* this point. Get current hardware vblank count and
@@ -169,9 +171,9 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
* delayed gpu counter increment.
*/
do {
- dev->vblank[crtc].last = dev->driver->get_vblank_counter(dev, crtc);
+ vblank->last = dev->driver->get_vblank_counter(dev, crtc);
vblrc = drm_get_last_vbltimestamp(dev, crtc, &tvblank, 0);
- } while (dev->vblank[crtc].last != dev->driver->get_vblank_counter(dev, crtc) && (--count) && vblrc);
+ } while (vblank->last != dev->driver->get_vblank_counter(dev, crtc) && (--count) && vblrc);
if (!count)
vblrc = 0;
@@ -179,7 +181,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
/* Compute time difference to stored timestamp of last vblank
* as updated by last invocation of drm_handle_vblank() in vblank irq.
*/
- vblcount = atomic_read(&dev->vblank[crtc].count);
+ vblcount = atomic_read(&vblank->count);
diff_ns = timeval_to_ns(&tvblank) -
timeval_to_ns(&vblanktimestamp(dev, crtc, vblcount));
@@ -196,7 +198,7 @@ static void vblank_disable_and_save(struct drm_device *dev, int crtc)
* hope for the best.
*/
if ((vblrc > 0) && (abs64(diff_ns) > 1000000)) {
- atomic_inc(&dev->vblank[crtc].count);
+ atomic_inc(&vblank->count);
smp_mb__after_atomic_inc();
}
@@ -236,8 +238,10 @@ void drm_vblank_cleanup(struct drm_device *dev)
return;
for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
- del_timer_sync(&dev->vblank[crtc].disable_timer);
- vblank_disable_fn((unsigned long)&dev->vblank[crtc]);
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
+
+ del_timer_sync(&vblank->disable_timer);
+ vblank_disable_fn((unsigned long)vblank);
}
kfree(dev->vblank);
@@ -270,11 +274,13 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs)
goto err;
for (i = 0; i < num_crtcs; i++) {
- dev->vblank[i].dev = dev;
- dev->vblank[i].crtc = i;
- init_waitqueue_head(&dev->vblank[i].queue);
- setup_timer(&dev->vblank[i].disable_timer, vblank_disable_fn,
- (unsigned long)&dev->vblank[i]);
+ struct drm_vblank_crtc *vblank = &dev->vblank[i];
+
+ vblank->dev = dev;
+ vblank->crtc = i;
+ init_waitqueue_head(&vblank->queue);
+ setup_timer(&vblank->disable_timer, vblank_disable_fn,
+ (unsigned long)vblank);
}
DRM_INFO("Supports vblank timestamp caching Rev 2 (21.10.2013).\n");
@@ -426,9 +432,11 @@ int drm_irq_uninstall(struct drm_device *dev)
if (dev->num_crtcs) {
spin_lock_irqsave(&dev->vbl_lock, irqflags);
for (i = 0; i < dev->num_crtcs; i++) {
- wake_up(&dev->vblank[i].queue);
- dev->vblank[i].enabled = false;
- dev->vblank[i].last =
+ struct drm_vblank_crtc *vblank = &dev->vblank[i];
+
+ wake_up(&vblank->queue);
+ vblank->enabled = false;
+ vblank->last =
dev->driver->get_vblank_counter(dev, i);
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
@@ -796,7 +804,9 @@ EXPORT_SYMBOL(drm_get_last_vbltimestamp);
*/
u32 drm_vblank_count(struct drm_device *dev, int crtc)
{
- return atomic_read(&dev->vblank[crtc].count);
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
+
+ return atomic_read(&vblank->count);
}
EXPORT_SYMBOL(drm_vblank_count);
@@ -816,6 +826,7 @@ EXPORT_SYMBOL(drm_vblank_count);
u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
struct timeval *vblanktime)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
u32 cur_vblank;
/* Read timestamp from slot of _vblank_time ringbuffer
@@ -824,10 +835,10 @@ u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
* a seqlock.
*/
do {
- cur_vblank = atomic_read(&dev->vblank[crtc].count);
+ cur_vblank = atomic_read(&vblank->count);
*vblanktime = vblanktimestamp(dev, crtc, cur_vblank);
smp_rmb();
- } while (cur_vblank != atomic_read(&dev->vblank[crtc].count));
+ } while (cur_vblank != atomic_read(&vblank->count));
return cur_vblank;
}
@@ -882,13 +893,14 @@ EXPORT_SYMBOL(drm_send_vblank_event);
*/
static int drm_vblank_enable(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
int ret = 0;
assert_spin_locked(&dev->vbl_lock);
spin_lock(&dev->vblank_time_lock);
- if (!dev->vblank[crtc].enabled) {
+ if (!vblank->enabled) {
/*
* Enable vblank irqs under vblank_time_lock protection.
* All vblank count & timestamp updates are held off
@@ -899,9 +911,9 @@ static int drm_vblank_enable(struct drm_device *dev, int crtc)
ret = dev->driver->enable_vblank(dev, crtc);
DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc, ret);
if (ret)
- atomic_dec(&dev->vblank[crtc].refcount);
+ atomic_dec(&vblank->refcount);
else {
- dev->vblank[crtc].enabled = true;
+ vblank->enabled = true;
drm_update_vblank_count(dev, crtc);
}
}
@@ -926,16 +938,17 @@ static int drm_vblank_enable(struct drm_device *dev, int crtc)
*/
int drm_vblank_get(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
unsigned long irqflags;
int ret = 0;
spin_lock_irqsave(&dev->vbl_lock, irqflags);
/* Going from 0->1 means we have to enable interrupts again */
- if (atomic_add_return(1, &dev->vblank[crtc].refcount) == 1) {
+ if (atomic_add_return(1, &vblank->refcount) == 1) {
ret = drm_vblank_enable(dev, crtc);
} else {
- if (!dev->vblank[crtc].enabled) {
- atomic_dec(&dev->vblank[crtc].refcount);
+ if (!vblank->enabled) {
+ atomic_dec(&vblank->refcount);
ret = -EINVAL;
}
}
@@ -975,15 +988,17 @@ EXPORT_SYMBOL(drm_crtc_vblank_get);
*/
void drm_vblank_put(struct drm_device *dev, int crtc)
{
- BUG_ON(atomic_read(&dev->vblank[crtc].refcount) == 0);
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
+
+ BUG_ON(atomic_read(&vblank->refcount) == 0);
/* Last user schedules interrupt disable */
- if (atomic_dec_and_test(&dev->vblank[crtc].refcount)) {
+ if (atomic_dec_and_test(&vblank->refcount)) {
if (drm_vblank_offdelay > 0)
- mod_timer(&dev->vblank[crtc].disable_timer,
+ mod_timer(&vblank->disable_timer,
jiffies + ((drm_vblank_offdelay * HZ)/1000));
else if (drm_vblank_offdelay == 0)
- vblank_disable_fn((unsigned long)&dev->vblank[crtc]);
+ vblank_disable_fn((unsigned long)vblank);
}
}
EXPORT_SYMBOL(drm_vblank_put);
@@ -1019,6 +1034,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_put);
*/
void drm_vblank_off(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
struct drm_pending_vblank_event *e, *t;
struct timeval now;
unsigned long irqflags;
@@ -1026,7 +1042,7 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
spin_lock_irqsave(&dev->vbl_lock, irqflags);
vblank_disable_and_save(dev, crtc);
- wake_up(&dev->vblank[crtc].queue);
+ wake_up(&vblank->queue);
/* Send any queued vblank events, lest the natives grow disquiet */
seq = drm_vblank_count_and_time(dev, crtc, &now);
@@ -1048,9 +1064,9 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
* Prevent subsequent drm_vblank_get() from re-enabling
* the vblank interrupt by bumping the refcount.
*/
- if (!dev->vblank[crtc].inmodeset) {
- atomic_inc(&dev->vblank[crtc].refcount);
- dev->vblank[crtc].inmodeset = 1;
+ if (!vblank->inmodeset) {
+ atomic_inc(&vblank->refcount);
+ vblank->inmodeset = 1;
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
@@ -1090,13 +1106,14 @@ EXPORT_SYMBOL(drm_crtc_vblank_off);
*/
void drm_vblank_on(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
unsigned long irqflags;
spin_lock_irqsave(&dev->vbl_lock, irqflags);
/* Drop our private "prevent drm_vblank_get" refcount */
- if (dev->vblank[crtc].inmodeset) {
- atomic_dec(&dev->vblank[crtc].refcount);
- dev->vblank[crtc].inmodeset = 0;
+ if (vblank->inmodeset) {
+ atomic_dec(&vblank->refcount);
+ vblank->inmodeset = 0;
}
/*
@@ -1106,12 +1123,12 @@ void drm_vblank_on(struct drm_device *dev, int crtc)
* -1 to make sure user will never see the same
* vblank counter value before and after a modeset
*/
- dev->vblank[crtc].last =
+ vblank->last =
(dev->driver->get_vblank_counter(dev, crtc) - 1) &
dev->max_vblank_count;
/* re-enable interrupts if there's are users left */
- if (atomic_read(&dev->vblank[crtc].refcount) != 0)
+ if (atomic_read(&vblank->refcount) != 0)
WARN_ON(drm_vblank_enable(dev, crtc));
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
}
@@ -1159,6 +1176,8 @@ EXPORT_SYMBOL(drm_crtc_vblank_on);
*/
void drm_vblank_pre_modeset(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
+
/* vblank is not initialized (IRQ not installed ?), or has been freed */
if (!dev->num_crtcs)
return;
@@ -1169,10 +1188,10 @@ void drm_vblank_pre_modeset(struct drm_device *dev, int crtc)
* to avoid corrupting the count if multiple, mismatch calls occur),
* so that interrupts remain enabled in the interim.
*/
- if (!dev->vblank[crtc].inmodeset) {
- dev->vblank[crtc].inmodeset = 0x1;
+ if (!vblank->inmodeset) {
+ vblank->inmodeset = 0x1;
if (drm_vblank_get(dev, crtc) == 0)
- dev->vblank[crtc].inmodeset |= 0x2;
+ vblank->inmodeset |= 0x2;
}
}
EXPORT_SYMBOL(drm_vblank_pre_modeset);
@@ -1187,21 +1206,22 @@ EXPORT_SYMBOL(drm_vblank_pre_modeset);
*/
void drm_vblank_post_modeset(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
unsigned long irqflags;
/* vblank is not initialized (IRQ not installed ?), or has been freed */
if (!dev->num_crtcs)
return;
- if (dev->vblank[crtc].inmodeset) {
+ if (vblank->inmodeset) {
spin_lock_irqsave(&dev->vbl_lock, irqflags);
dev->vblank_disable_allowed = true;
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
- if (dev->vblank[crtc].inmodeset & 0x2)
+ if (vblank->inmodeset & 0x2)
drm_vblank_put(dev, crtc);
- dev->vblank[crtc].inmodeset = 0;
+ vblank->inmodeset = 0;
}
}
EXPORT_SYMBOL(drm_vblank_post_modeset);
@@ -1336,6 +1356,7 @@ err_put:
int drm_wait_vblank(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
+ struct drm_vblank_crtc *vblank;
union drm_wait_vblank *vblwait = data;
int ret;
unsigned int flags, seq, crtc, high_crtc;
@@ -1365,6 +1386,8 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
if (crtc >= dev->num_crtcs)
return -EINVAL;
+ vblank = &dev->vblank[crtc];
+
ret = drm_vblank_get(dev, crtc);
if (ret) {
DRM_DEBUG("failed to acquire vblank counter, %d\n", ret);
@@ -1397,11 +1420,11 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
DRM_DEBUG("waiting on vblank count %d, crtc %d\n",
vblwait->request.sequence, crtc);
- dev->vblank[crtc].last_wait = vblwait->request.sequence;
- DRM_WAIT_ON(ret, dev->vblank[crtc].queue, 3 * HZ,
+ vblank->last_wait = vblwait->request.sequence;
+ DRM_WAIT_ON(ret, vblank->queue, 3 * HZ,
(((drm_vblank_count(dev, crtc) -
vblwait->request.sequence) <= (1 << 23)) ||
- !dev->vblank[crtc].enabled ||
+ !vblank->enabled ||
!dev->irq_enabled));
if (ret != -EINTR) {
@@ -1462,6 +1485,7 @@ static void drm_handle_vblank_events(struct drm_device *dev, int crtc)
*/
bool drm_handle_vblank(struct drm_device *dev, int crtc)
{
+ struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
u32 vblcount;
s64 diff_ns;
struct timeval tvblank;
@@ -1477,7 +1501,7 @@ bool drm_handle_vblank(struct drm_device *dev, int crtc)
spin_lock_irqsave(&dev->vblank_time_lock, irqflags);
/* Vblank irq handling disabled. Nothing to do. */
- if (!dev->vblank[crtc].enabled) {
+ if (!vblank->enabled) {
spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags);
return false;
}
@@ -1487,7 +1511,7 @@ bool drm_handle_vblank(struct drm_device *dev, int crtc)
*/
/* Get current timestamp and count. */
- vblcount = atomic_read(&dev->vblank[crtc].count);
+ vblcount = atomic_read(&vblank->count);
drm_get_last_vbltimestamp(dev, crtc, &tvblank, DRM_CALLED_FROM_VBLIRQ);
/* Compute time difference to timestamp of last vblank */
@@ -1511,14 +1535,14 @@ bool drm_handle_vblank(struct drm_device *dev, int crtc)
* the timestamp computed above.
*/
smp_mb__before_atomic_inc();
- atomic_inc(&dev->vblank[crtc].count);
+ atomic_inc(&vblank->count);
smp_mb__after_atomic_inc();
} else {
DRM_DEBUG("crtc %d: Redundant vblirq ignored. diff_ns = %d\n",
crtc, (int) diff_ns);
}
- wake_up(&dev->vblank[crtc].queue);
+ wake_up(&vblank->queue);
drm_handle_vblank_events(dev, crtc);
spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags);
--
1.8.5.5
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