[PATCH] drm: Pass along the hotplug connector to the uevent
Chris Wilson
chris at chris-wilson.co.uk
Fri Oct 21 08:25:56 UTC 2016
If we know which connector was plugged/unplugged or
connected/disconnected, we can pass that information along to userspace
inside the uevent to reduce the amount of work userspace has to perform
after the event (i.e. instead of looking over all connectors, it can
just reprobe the affected one).
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Villle Syrjälä <ville.syrjala at linux.intel.com>
Cc: Manasi Navare <manasi.d.navare at intel.com>
---
drivers/gpu/drm/drm_probe_helper.c | 10 ++++++----
drivers/gpu/drm/drm_sysfs.c | 19 +++++++++++++++----
drivers/gpu/drm/i2c/tda998x_drv.c | 2 +-
drivers/gpu/drm/i915/intel_dp.c | 3 ++-
drivers/gpu/drm/i915/intel_dp_mst.c | 2 +-
drivers/gpu/drm/i915/intel_hotplug.c | 6 +-----
drivers/gpu/drm/qxl/qxl_display.c | 2 +-
drivers/gpu/drm/radeon/radeon_dp_mst.c | 2 +-
drivers/gpu/drm/virtio/virtgpu_vq.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 2 +-
include/drm/drmP.h | 3 ++-
include/drm/drm_crtc_helper.h | 3 ++-
13 files changed, 35 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index f6b64d7d3528..8790ee35a7cd 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -347,6 +347,7 @@ EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
/**
* drm_kms_helper_hotplug_event - fire off KMS hotplug events
* @dev: drm_device whose connector state changed
+ * @connector: connector on which the status changed, if any
*
* This function fires off the uevent for userspace and also calls the
* output_poll_changed function, which is most commonly used to inform the fbdev
@@ -360,10 +361,11 @@ EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
* This function must be called from process context with no mode
* setting locks held.
*/
-void drm_kms_helper_hotplug_event(struct drm_device *dev)
+void drm_kms_helper_hotplug_event(struct drm_device *dev,
+ struct drm_connector *connector)
{
/* send a uevent + call fbdev */
- drm_sysfs_hotplug_event(dev);
+ drm_sysfs_hotplug_event(dev, connector);
if (dev->mode_config.funcs->output_poll_changed)
dev->mode_config.funcs->output_poll_changed(dev);
}
@@ -444,7 +446,7 @@ static void output_poll_execute(struct work_struct *work)
out:
if (changed)
- drm_kms_helper_hotplug_event(dev);
+ drm_kms_helper_hotplug_event(dev, NULL);
if (repoll)
schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
@@ -578,7 +580,7 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev)
mutex_unlock(&dev->mode_config.mutex);
if (changed)
- drm_kms_helper_hotplug_event(dev);
+ drm_kms_helper_hotplug_event(dev, NULL);
return changed;
}
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 9a37196c1bf1..c8f46055e2d0 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -280,7 +280,7 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
}
/* Let userspace know we have a new connector */
- drm_sysfs_hotplug_event(dev);
+ drm_sysfs_hotplug_event(dev, connector);
return 0;
}
@@ -312,19 +312,30 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
/**
* drm_sysfs_hotplug_event - generate a DRM uevent
* @dev: DRM device
+ * @connector: the DRM connector, if any
*
* Send a uevent for the DRM device specified by @dev. Currently we only
* set HOTPLUG=1 in the uevent environment, but this could be expanded to
* deal with other types of events.
*/
-void drm_sysfs_hotplug_event(struct drm_device *dev)
+void drm_sysfs_hotplug_event(struct drm_device *dev,
+ struct drm_connector *connector)
{
- char *event_string = "HOTPLUG=1";
- char *envp[] = { event_string, NULL };
+ char *envp[3] = { "HOTPLUG=1" };
+ char *connector_event = NULL;
+
+ if (connector)
+ connector_event = kasprintf(GFP_KERNEL,
+ "CONNECTOR=%d",
+ connector->base.id);
+ if (connector_event)
+ envp[1] = connector_event;
DRM_DEBUG("generating hotplug event\n");
kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
+
+ kfree(connector_event);
}
EXPORT_SYMBOL(drm_sysfs_hotplug_event);
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 9798d400d817..9fd873c87686 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -617,7 +617,7 @@ static void tda998x_detect_work(struct work_struct *work)
struct drm_device *dev = priv->encoder.dev;
if (dev)
- drm_kms_helper_hotplug_event(dev);
+ drm_kms_helper_hotplug_event(dev, NULL);
}
/*
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 88f3b745a326..59cd185689c0 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3981,7 +3981,8 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp)
intel_dp->is_mst = false;
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
/* send a hotplug event */
- drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev);
+ drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev,
+ &intel_dp->attached_connector->base);
}
}
return -EINVAL;
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 3ffbd69e4551..2bd48a987934 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -493,7 +493,7 @@ static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
- drm_kms_helper_hotplug_event(dev);
+ drm_kms_helper_hotplug_event(dev, &intel_dp->attached_connector->base);
}
static const struct drm_dp_mst_topology_cbs mst_cbs = {
diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c
index 334d47b5811a..72cd8622670c 100644
--- a/drivers/gpu/drm/i915/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/intel_hotplug.c
@@ -307,7 +307,6 @@ static void i915_hotplug_work_func(struct work_struct *work)
struct intel_connector *intel_connector;
struct intel_encoder *intel_encoder;
struct drm_connector *connector;
- bool changed = false;
u32 hpd_event_bits;
mutex_lock(&mode_config->mutex);
@@ -334,13 +333,10 @@ static void i915_hotplug_work_func(struct work_struct *work)
if (intel_encoder->hot_plug)
intel_encoder->hot_plug(intel_encoder);
if (intel_hpd_irq_event(dev, connector))
- changed = true;
+ drm_kms_helper_hotplug_event(dev, connector);
}
}
mutex_unlock(&mode_config->mutex);
-
- if (changed)
- drm_kms_helper_hotplug_event(dev);
}
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 2e01c6e5d905..3c196a096c2d 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -135,7 +135,7 @@ void qxl_display_read_client_monitors_config(struct qxl_device *qdev)
if (!drm_helper_hpd_irq_event(qdev->ddev)) {
/* notify that the monitor configuration changed, to
adjust at the arbitrary resolution */
- drm_kms_helper_hotplug_event(qdev->ddev);
+ drm_kms_helper_hotplug_event(qdev->ddev, NULL);
}
}
diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
index de504ea29c06..e80b1c365a2d 100644
--- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
@@ -331,7 +331,7 @@ static void radeon_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
struct drm_device *dev = master->base.dev;
- drm_kms_helper_hotplug_event(dev);
+ drm_kms_helper_hotplug_event(dev, NULL);
}
const struct drm_dp_mst_topology_cbs mst_cbs = {
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 5a0f8a745b9d..72be43c9e008 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -583,7 +583,7 @@ static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,
wake_up(&vgdev->resp_wq);
if (!drm_helper_hpd_irq_event(vgdev->ddev))
- drm_kms_helper_hotplug_event(vgdev->ddev);
+ drm_kms_helper_hotplug_event(vgdev->ddev, NULL);
}
static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index e8ae3dc476d1..36aa1a0440c3 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1233,7 +1233,7 @@ static int vmw_master_set(struct drm_device *dev,
}
dev_priv->active_master = vmaster;
- drm_sysfs_hotplug_event(dev);
+ drm_sysfs_hotplug_event(dev, NULL);
return 0;
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index c965514b82be..26262763aa5f 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1407,7 +1407,7 @@ static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
}
mutex_unlock(&dev->mode_config.mutex);
- drm_sysfs_hotplug_event(dev);
+ drm_sysfs_hotplug_event(dev, con);
return 0;
}
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 672644031bd5..0a4a4aa61fd3 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1038,7 +1038,8 @@ extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
/* sysfs support (drm_sysfs.c) */
-extern void drm_sysfs_hotplug_event(struct drm_device *dev);
+extern void drm_sysfs_hotplug_event(struct drm_device *dev,
+ struct drm_connector *connector);
struct drm_device *drm_dev_alloc(struct drm_driver *driver,
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
index 982c299e435a..a8cd620e8a5c 100644
--- a/include/drm/drm_crtc_helper.h
+++ b/include/drm/drm_crtc_helper.h
@@ -69,7 +69,8 @@ extern int drm_helper_probe_single_connector_modes(struct drm_connector
extern void drm_kms_helper_poll_init(struct drm_device *dev);
extern void drm_kms_helper_poll_fini(struct drm_device *dev);
extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
-extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
+extern void drm_kms_helper_hotplug_event(struct drm_device *dev,
+ struct drm_connector *connector);
extern void drm_kms_helper_poll_disable(struct drm_device *dev);
extern void drm_kms_helper_poll_enable(struct drm_device *dev);
--
2.9.3
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