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drm: Reduce the amount of dev->vblank[crtc] in the code

Browse source 
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
)
...+>
}

v2: Rebased

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-08-06 14:49:50 +03:00 committed by Daniel Vetter
parent f8ad028cc0
commit 8a51d5bef0
1 changed files with 79 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

134
drivers/gpu/drm/drm_irq.c
View file

@ -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();
atomic_add(diff, &dev->vblank[crtc].count);
atomic_add(diff, &vblank->count);
smp_mb__after_atomic();
}
@ -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();
}
@ -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;
}
}
@ -975,12 +988,14 @@ 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) &&
(drm_vblank_offdelay > 0))
mod_timer(&dev->vblank[crtc].disable_timer,
mod_timer(&vblank->disable_timer,
jiffies + ((drm_vblank_offdelay * HZ)/1000));
}
EXPORT_SYMBOL(drm_vblank_put);
@ -1016,6 +1031,7 @@ 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;
@ -1023,7 +1039,7 @@ 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);
@ -1045,9 +1061,9 @@ 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);
@ -1087,13 +1103,14 @@ 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;
}
/*
@ -1103,12 +1120,12 @@ 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);
}
@ -1156,6 +1173,8 @@ 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;
@ -1166,10 +1185,10 @@ 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);
@ -1184,21 +1203,22 @@ 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);
@ -1333,6 +1353,7 @@ 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;
@ -1362,6 +1383,8 @@ 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);
@ -1394,11 +1417,11 @@ 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) {
@ -1459,6 +1482,7 @@ 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;
@ -1474,7 +1498,7 @@ 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;
}
@ -1484,7 +1508,7 @@ 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 */
@ -1508,14 +1532,14 @@ bool drm_handle_vblank(struct drm_device *dev, int crtc)
* the timestamp computed above.
*/
smp_mb__before_atomic();
atomic_inc(&dev->vblank[crtc].count);
atomic_inc(&vblank->count);
smp_mb__after_atomic();
} 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);