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: Tejun Heo <tj@kernel.org>
Acked-by: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 9b2a541..7fa3380 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -808,13 +808,11 @@
}
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 @@
}
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 @@
{
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 @@
}
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 @@
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 @@
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 @@
{
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,
-};