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 Cc: David Airlie airlied@linux.ie Cc: dri-devel@lists.freedesktop.org --- drivers/gpu/drm/drm_crtc_helper.c | 29 ++++++++++------------------- include/drm/drm_crtc.h | 3 +-- 2 files changed, 11 insertions(+), 21 deletions(-)
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 @@ 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, -}; diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 93a1a31..c707270 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -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;