提交 991ea75c 编写于 作者: T Tejun Heo

drm: use workqueue instead of slow-work

Workqueue can now handle high concurrency.  Convert drm_crtc_helper to
use system_nrt_wq instead of slow-work.  The conversion is mostly
straight forward.  One difference is that drm_helper_hpd_irq_event()
no longer blocks and can be called from any context.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NDavid Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
上级 9b646972
......@@ -808,13 +808,11 @@ int drm_helper_resume_force_mode(struct drm_device *dev)
}
EXPORT_SYMBOL(drm_helper_resume_force_mode);
static struct slow_work_ops output_poll_ops;
#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
static void output_poll_execute(struct slow_work *work)
static void output_poll_execute(struct work_struct *work)
{
struct delayed_slow_work *delayed_work = container_of(work, struct delayed_slow_work, work);
struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_slow_work);
struct delayed_work *delayed_work = to_delayed_work(work);
struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
struct drm_connector *connector;
enum drm_connector_status old_status, status;
bool repoll = false, changed = false;
......@@ -854,7 +852,7 @@ static void output_poll_execute(struct slow_work *work)
}
if (repoll) {
ret = delayed_slow_work_enqueue(delayed_work, DRM_OUTPUT_POLL_PERIOD);
ret = queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
if (ret)
DRM_ERROR("delayed enqueue failed %d\n", ret);
}
......@@ -864,7 +862,7 @@ void drm_kms_helper_poll_disable(struct drm_device *dev)
{
if (!dev->mode_config.poll_enabled)
return;
delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
}
EXPORT_SYMBOL(drm_kms_helper_poll_disable);
......@@ -880,7 +878,7 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
}
if (poll) {
ret = delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, DRM_OUTPUT_POLL_PERIOD);
ret = queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
if (ret)
DRM_ERROR("delayed enqueue failed %d\n", ret);
}
......@@ -889,9 +887,7 @@ EXPORT_SYMBOL(drm_kms_helper_poll_enable);
void drm_kms_helper_poll_init(struct drm_device *dev)
{
slow_work_register_user(THIS_MODULE);
delayed_slow_work_init(&dev->mode_config.output_poll_slow_work,
&output_poll_ops);
INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
dev->mode_config.poll_enabled = true;
drm_kms_helper_poll_enable(dev);
......@@ -901,7 +897,6 @@ EXPORT_SYMBOL(drm_kms_helper_poll_init);
void drm_kms_helper_poll_fini(struct drm_device *dev)
{
drm_kms_helper_poll_disable(dev);
slow_work_unregister_user(THIS_MODULE);
}
EXPORT_SYMBOL(drm_kms_helper_poll_fini);
......@@ -909,12 +904,8 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
{
if (!dev->mode_config.poll_enabled)
return;
delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
/* schedule a slow work asap */
delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, 0);
/* kill timer and schedule immediate execution, this doesn't block */
cancel_delayed_work(&dev->mode_config.output_poll_work);
queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
}
EXPORT_SYMBOL(drm_helper_hpd_irq_event);
static struct slow_work_ops output_poll_ops = {
.execute = output_poll_execute,
};
......@@ -31,7 +31,6 @@
#include <linux/idr.h>
#include <linux/fb.h>
#include <linux/slow-work.h>
struct drm_device;
struct drm_mode_set;
......@@ -595,7 +594,7 @@ struct drm_mode_config {
/* output poll support */
bool poll_enabled;
struct delayed_slow_work output_poll_slow_work;
struct delayed_work output_poll_work;
/* pointers to standard properties */
struct list_head property_blob_list;
......
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