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drm/fbdev: rework output polling to be back in the core. (v4)

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After thinking it over a lot it made more sense for the core to deal with
the output polling especially so it can notify X.

v2: drop plans for fake connector - per Michel's comments - fix X patch sent to xorg-devel, add intel polled/hpd setting, add initial nouveau polled/hpd settings.

v3: add config lock take inside polling, add intel/nouveau poll init/fini calls

v4: config lock was a bit agressive, only needed around connector list reading.
otherwise it could re-enter.

glisse: discard drm_helper_hpd_irq_event

v3: Reviewed-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2010-05-07 06:42:51 +00:00
parent 0ddfa7d574
commit eb1f8e4f3b
26 changed files with 213 additions and 159 deletions
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95
drivers/gpu/drm/drm_crtc_helper.c
View File

@@ -807,3 +807,98 @@ int drm_helper_resume_force_mode(struct drm_device *dev)
return 0;
}
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)
{
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 drm_connector *connector;
enum drm_connector_status old_status, status;
bool repoll = false, changed = false;
int ret;
mutex_lock(&dev->mode_config.mutex);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
/* if this is HPD or polled don't check it -
TV out for instance */
if (!connector->polled)
continue;
else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
repoll = true;
old_status = connector->status;
/* if we are connected and don't want to poll for disconnect
skip it */
if (old_status == connector_status_connected &&
!(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
!(connector->polled & DRM_CONNECTOR_POLL_HPD))
continue;
status = connector->funcs->detect(connector);
if (old_status != status)
changed = true;
}
mutex_unlock(&dev->mode_config.mutex);
if (changed) {
/* send a uevent + call fbdev */
drm_sysfs_hotplug_event(dev);
if (dev->mode_config.funcs->output_poll_changed)
dev->mode_config.funcs->output_poll_changed(dev);
}
if (repoll) {
ret = delayed_slow_work_enqueue(delayed_work, DRM_OUTPUT_POLL_PERIOD);
if (ret)
DRM_ERROR("delayed enqueue failed %d\n", ret);
}
}
void drm_kms_helper_poll_init(struct drm_device *dev)
{
struct drm_connector *connector;
bool poll = false;
int ret;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->polled)
poll = true;
}
slow_work_register_user(THIS_MODULE);
delayed_slow_work_init(&dev->mode_config.output_poll_slow_work,
&output_poll_ops);
if (poll) {
ret = delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, DRM_OUTPUT_POLL_PERIOD);
if (ret)
DRM_ERROR("delayed enqueue failed %d\n", ret);
}
}
EXPORT_SYMBOL(drm_kms_helper_poll_init);
void drm_kms_helper_poll_fini(struct drm_device *dev)
{
delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
slow_work_unregister_user(THIS_MODULE);
}
EXPORT_SYMBOL(drm_kms_helper_poll_fini);
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);
}
EXPORT_SYMBOL(drm_helper_hpd_irq_event);
static struct slow_work_ops output_poll_ops = {
.execute = output_poll_execute,
};