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Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0020-drm-probe-helper-Create-a-HPD-IRQ-event-helper-for-a.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.15/950-0020-drm-probe-helper-Create-a-HPD-IRQ-event-helper-for-a.patch201
1 files changed, 0 insertions, 201 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0020-drm-probe-helper-Create-a-HPD-IRQ-event-helper-for-a.patch b/target/linux/bcm27xx/patches-5.15/950-0020-drm-probe-helper-Create-a-HPD-IRQ-event-helper-for-a.patch
deleted file mode 100644
index 82086a13fe..0000000000
--- a/target/linux/bcm27xx/patches-5.15/950-0020-drm-probe-helper-Create-a-HPD-IRQ-event-helper-for-a.patch
+++ /dev/null
@@ -1,201 +0,0 @@
-From 22ce134cee72bd9ef4b02c8769f868309f2ab8fd Mon Sep 17 00:00:00 2001
-From: Maxime Ripard <maxime@cerno.tech>
-Date: Thu, 19 Aug 2021 14:37:04 +0200
-Subject: [PATCH] drm/probe-helper: Create a HPD IRQ event helper for a
- single connector
-
-The drm_helper_hpd_irq_event() function is iterating over all the
-connectors when an hotplug event is detected.
-
-During that iteration, it will call each connector detect function and
-figure out if its status changed.
-
-Finally, if any connector changed, it will notify the user-space and the
-clients that something changed on the DRM device.
-
-This is supposed to be used for drivers that don't have a hotplug
-interrupt for individual connectors. However, drivers that can use an
-interrupt for a single connector are left in the dust and can either
-reimplement the logic used during the iteration for each connector or
-use that helper and iterate over all connectors all the time.
-
-Since both are suboptimal, let's create a helper that will only perform
-the status detection on a single connector.
-
-Signed-off-by: Maxime Ripard <maxime@cerno.tech>
-
----
-
-Changes from v1:
- - Rename the shared function
- - Move the hotplug event notification out of the shared function
- - Added missing locks
- - Improve the documentation
- - Switched to drm_dbg_kms
----
- drivers/gpu/drm/drm_probe_helper.c | 120 ++++++++++++++++++++---------
- include/drm/drm_probe_helper.h | 1 +
- 2 files changed, 86 insertions(+), 35 deletions(-)
-
---- a/drivers/gpu/drm/drm_probe_helper.c
-+++ b/drivers/gpu/drm/drm_probe_helper.c
-@@ -796,6 +796,86 @@ void drm_kms_helper_poll_fini(struct drm
- }
- EXPORT_SYMBOL(drm_kms_helper_poll_fini);
-
-+static bool check_connector_changed(struct drm_connector *connector)
-+{
-+ struct drm_device *dev = connector->dev;
-+ enum drm_connector_status old_status;
-+ u64 old_epoch_counter;
-+ bool changed = false;
-+
-+ /* Only handle HPD capable connectors. */
-+ drm_WARN_ON(dev, !(connector->polled & DRM_CONNECTOR_POLL_HPD));
-+
-+ drm_WARN_ON(dev, !mutex_is_locked(&dev->mode_config.mutex));
-+
-+ old_status = connector->status;
-+ old_epoch_counter = connector->epoch_counter;
-+
-+ drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Old epoch counter %llu\n",
-+ connector->base.id,
-+ connector->name,
-+ old_epoch_counter);
-+
-+ connector->status = drm_helper_probe_detect(connector, NULL, false);
-+ drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",
-+ connector->base.id,
-+ connector->name,
-+ drm_get_connector_status_name(old_status),
-+ drm_get_connector_status_name(connector->status));
-+
-+ drm_dbg_kms(dev, "[CONNECTOR:%d:%s] New epoch counter %llu\n",
-+ connector->base.id,
-+ connector->name,
-+ connector->epoch_counter);
-+
-+ /*
-+ * Check if epoch counter had changed, meaning that we need
-+ * to send a uevent.
-+ */
-+ if (old_epoch_counter != connector->epoch_counter)
-+ changed = true;
-+
-+ return changed;
-+}
-+
-+/**
-+ * drm_connector_helper_hpd_irq_event - hotplug processing
-+ * @connector: drm_connector
-+ *
-+ * Drivers can use this helper function to run a detect cycle on a connector
-+ * which has the DRM_CONNECTOR_POLL_HPD flag set in its &polled member.
-+ *
-+ * This helper function is useful for drivers which can track hotplug
-+ * interrupts for a single connector. Drivers that want to send a
-+ * hotplug event for all connectors or can't track hotplug interrupts
-+ * per connector need to use drm_helper_hpd_irq_event().
-+ *
-+ * This function must be called from process context with no mode
-+ * setting locks held.
-+ *
-+ * Note that a connector can be both polled and probed from the hotplug
-+ * handler, in case the hotplug interrupt is known to be unreliable.
-+ */
-+bool drm_connector_helper_hpd_irq_event(struct drm_connector *connector)
-+{
-+ struct drm_device *dev = connector->dev;
-+ bool changed;
-+
-+ mutex_lock(&dev->mode_config.mutex);
-+ changed = check_connector_changed(connector);
-+ mutex_unlock(&dev->mode_config.mutex);
-+
-+ if (changed) {
-+ drm_kms_helper_hotplug_event(dev);
-+ drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Sent hotplug event\n",
-+ connector->base.id,
-+ connector->name);
-+ }
-+
-+ return changed;
-+}
-+EXPORT_SYMBOL(drm_connector_helper_hpd_irq_event);
-+
- /**
- * drm_helper_hpd_irq_event - hotplug processing
- * @dev: drm_device
-@@ -809,9 +889,10 @@ EXPORT_SYMBOL(drm_kms_helper_poll_fini);
- * interrupts for each connector.
- *
- * Drivers which support hotplug interrupts for each connector individually and
-- * which have a more fine-grained detect logic should bypass this code and
-- * directly call drm_kms_helper_hotplug_event() in case the connector state
-- * changed.
-+ * which have a more fine-grained detect logic can use
-+ * drm_connector_helper_hpd_irq_event(). Alternatively, they should bypass this
-+ * code and directly call drm_kms_helper_hotplug_event() in case the connector
-+ * state changed.
- *
- * This function must be called from process context with no mode
- * setting locks held.
-@@ -823,9 +904,7 @@ bool drm_helper_hpd_irq_event(struct drm
- {
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
-- enum drm_connector_status old_status;
- bool changed = false;
-- u64 old_epoch_counter;
-
- if (!dev->mode_config.poll_enabled)
- return false;
-@@ -833,37 +912,8 @@ bool drm_helper_hpd_irq_event(struct drm
- mutex_lock(&dev->mode_config.mutex);
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
-- /* Only handle HPD capable connectors. */
-- if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
-- continue;
--
-- old_status = connector->status;
--
-- old_epoch_counter = connector->epoch_counter;
--
-- DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Old epoch counter %llu\n", connector->base.id,
-- connector->name,
-- old_epoch_counter);
--
-- connector->status = drm_helper_probe_detect(connector, NULL, false);
-- DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
-- connector->base.id,
-- connector->name,
-- drm_get_connector_status_name(old_status),
-- drm_get_connector_status_name(connector->status));
--
-- DRM_DEBUG_KMS("[CONNECTOR:%d:%s] New epoch counter %llu\n",
-- connector->base.id,
-- connector->name,
-- connector->epoch_counter);
--
-- /*
-- * Check if epoch counter had changed, meaning that we need
-- * to send a uevent.
-- */
-- if (old_epoch_counter != connector->epoch_counter)
-+ if (check_connector_changed(connector))
- changed = true;
--
- }
- drm_connector_list_iter_end(&conn_iter);
- mutex_unlock(&dev->mode_config.mutex);
---- a/include/drm/drm_probe_helper.h
-+++ b/include/drm/drm_probe_helper.h
-@@ -18,6 +18,7 @@ int drm_helper_probe_detect(struct drm_c
- void drm_kms_helper_poll_init(struct drm_device *dev);
- void drm_kms_helper_poll_fini(struct drm_device *dev);
- bool drm_helper_hpd_irq_event(struct drm_device *dev);
-+bool drm_connector_helper_hpd_irq_event(struct drm_connector *connector);
- void drm_kms_helper_hotplug_event(struct drm_device *dev);
-
- void drm_kms_helper_poll_disable(struct drm_device *dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-12 17:06:05 +0000