diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/drm_probe_helper.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/drm_probe_helper.c | 65 |
1 files changed, 44 insertions, 21 deletions
diff --git a/kernel/drivers/gpu/drm/drm_probe_helper.c b/kernel/drivers/gpu/drm/drm_probe_helper.c index 63503879a..f8b5fcfa9 100644 --- a/kernel/drivers/gpu/drm/drm_probe_helper.c +++ b/kernel/drivers/gpu/drm/drm_probe_helper.c @@ -93,6 +93,40 @@ static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector) return 1; } +#define DRM_OUTPUT_POLL_PERIOD (10*HZ) +/** + * drm_kms_helper_poll_enable_locked - re-enable output polling. + * @dev: drm_device + * + * This function re-enables the output polling work without + * locking the mode_config mutex. + * + * This is like drm_kms_helper_poll_enable() however it is to be + * called from a context where the mode_config mutex is locked + * already. + */ +void drm_kms_helper_poll_enable_locked(struct drm_device *dev) +{ + bool poll = false; + struct drm_connector *connector; + + WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); + + if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) + return; + + drm_for_each_connector(connector, dev) { + if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | + DRM_CONNECTOR_POLL_DISCONNECT)) + poll = true; + } + + if (poll) + schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); +} +EXPORT_SYMBOL(drm_kms_helper_poll_enable_locked); + + static int drm_helper_probe_single_connector_modes_merge_bits(struct drm_connector *connector, uint32_t maxX, uint32_t maxY, bool merge_type_bits) { @@ -153,7 +187,7 @@ static int drm_helper_probe_single_connector_modes_merge_bits(struct drm_connect /* Re-enable polling in case the global poll config changed. */ if (drm_kms_helper_poll != dev->mode_config.poll_running) - drm_kms_helper_poll_enable(dev); + drm_kms_helper_poll_enable_locked(dev); dev->mode_config.poll_running = drm_kms_helper_poll; @@ -195,7 +229,8 @@ static int drm_helper_probe_single_connector_modes_merge_bits(struct drm_connect mode_flags |= DRM_MODE_FLAG_3D_MASK; list_for_each_entry(mode, &connector->modes, head) { - mode->status = drm_mode_validate_basic(mode); + if (mode->status == MODE_OK) + mode->status = drm_mode_validate_basic(mode); if (mode->status == MODE_OK) mode->status = drm_mode_validate_size(mode, maxX, maxY); @@ -295,7 +330,6 @@ void drm_kms_helper_hotplug_event(struct drm_device *dev) } EXPORT_SYMBOL(drm_kms_helper_hotplug_event); -#define DRM_OUTPUT_POLL_PERIOD (10*HZ) static void output_poll_execute(struct work_struct *work) { struct delayed_work *delayed_work = to_delayed_work(work); @@ -312,7 +346,7 @@ static void output_poll_execute(struct work_struct *work) goto out; mutex_lock(&dev->mode_config.mutex); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + drm_for_each_connector(connector, dev) { /* Ignore forced connectors. */ if (connector->force) @@ -323,8 +357,6 @@ static void output_poll_execute(struct work_struct *work) if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD) continue; - repoll = true; - old_status = connector->status; /* if we are connected and don't want to poll for disconnect skip it */ @@ -332,6 +364,8 @@ static void output_poll_execute(struct work_struct *work) !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT)) continue; + repoll = true; + connector->status = connector->funcs->detect(connector, false); if (old_status != connector->status) { const char *old, *new; @@ -407,20 +441,9 @@ EXPORT_SYMBOL(drm_kms_helper_poll_disable); */ void drm_kms_helper_poll_enable(struct drm_device *dev) { - bool poll = false; - struct drm_connector *connector; - - if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll) - return; - - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | - DRM_CONNECTOR_POLL_DISCONNECT)) - poll = true; - } - - if (poll) - schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); + mutex_lock(&dev->mode_config.mutex); + drm_kms_helper_poll_enable_locked(dev); + mutex_unlock(&dev->mode_config.mutex); } EXPORT_SYMBOL(drm_kms_helper_poll_enable); @@ -495,7 +518,7 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) return false; mutex_lock(&dev->mode_config.mutex); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + drm_for_each_connector(connector, dev) { /* Only handle HPD capable connectors. */ if (!(connector->polled & DRM_CONNECTOR_POLL_HPD)) |