[Intel-gfx] [PATCH v6 0/7] drm/i915: Convert fbdev to DRM client

[Intel-gfx] [PATCH v6 0/7] drm/i915: Convert fbdev to DRM client

[Thomas Zimmermann]

Convert i915's fbdev code to struct drm_client. Replaces the current
ad-hoc integration. The conversion includes a number of cleanups. The
patchset also enables unloading of driver modules with in-kernel DRM
clients; a feature required by i915.

As with the other drivers' fbdev emulation, fbdev in i915 is now
an in-kernel DRM client that runs after the DRM device has been
registered. This allows to remove the asynchronous initialization.

i915 is the last driver with an fbdev emulation that is not build
upon struct drm_client. Once reviewed, the patches would ideally go
into drm-misc-next, so that the old fbdev helper code can be removed.
We can also attempt to add additional in-kernel clients. A DRM-based
dmesg log or a bootsplash are commonly mentioned. DRM can then switch
easily among the existing clients if/when required.

v6:
	* reorder patches to fix build (Jouni)
	* remove unnecessary handling of non-atomic commits (Jouni, Ville)
	* return errors from callbacks (Jouni)
	* various minor fixes
v5:
	* style fixes (checkpatch)
v4:
	<no changes>
v3:
	* support module unloading (Jani, CI bot)
	* as before, silently ignore devices without displays (CI  bot)
v2:
	* fix error handling (Jani)
	* fix non-fbdev builds
	* various minor fixes and cleanups

Thomas Zimmermann (7):
  drm/client: Do not acquire module reference
  drm/client: Export drm_client_dev_unregister()
  drm/i915: Unregister in-kernel clients
  drm/i915: Move fbdev functions
  drm/i915: Initialize fbdev DRM client with callback functions
  drm/i915: Implement fbdev client callbacks
  drm/i915: Implement fbdev emulation as in-kernel client

 drivers/gpu/drm/drm_client.c                  |  25 +-
 drivers/gpu/drm/i915/display/intel_display.c  |   1 -
 .../drm/i915/display/intel_display_driver.c   |  19 --
 drivers/gpu/drm/i915/display/intel_fbdev.c    | 265 ++++++++++--------
 drivers/gpu/drm/i915/display/intel_fbdev.h    |  29 +-
 drivers/gpu/drm/i915/i915_driver.c            |  27 +-
 6 files changed, 167 insertions(+), 199 deletions(-)


base-commit: b7816c393496dc4497c1327310821407f7171d8b
-- 
2.42.0

[Intel-gfx] [PATCH v6 1/7] drm/client: Do not acquire module reference

[Thomas Zimmermann]

Do not acquire a reference on the module that provides a client's
callback functions in drm_client_init(). The additional reference
prevents the user from unloading the callback functions' module and
thus creating dangling pointers.

This is only necessary if there is no direct dependency between the
caller of drm_client_init() and the provider of the callbacks in
struct drm_client_funcs. If this case ever existed, it has been
removed from the DRM code. Callers of drm_client_init() also provide
the callback implementation. The lifetime of the clients is tied to
the dependency chain's outer-most module, which is the hardware's
DRM driver. Before client helpers could be unloaded, the driver module
would have to be unloaded, which also unregisters all clients.

Driver modules that set up DRM clients can now be unloaded.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
---
 drivers/gpu/drm/drm_client.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index c3027115d0552..9403b3f576f7b 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -5,7 +5,6 @@
 
 #include <linux/iosys-map.h>
 #include <linux/list.h>
-#include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
@@ -84,16 +83,13 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
 	if (!drm_core_check_feature(dev, DRIVER_MODESET) || !dev->driver->dumb_create)
 		return -EOPNOTSUPP;
 
-	if (funcs && !try_module_get(funcs->owner))
-		return -ENODEV;
-
 	client->dev = dev;
 	client->name = name;
 	client->funcs = funcs;
 
 	ret = drm_client_modeset_create(client);
 	if (ret)
-		goto err_put_module;
+		return ret;
 
 	ret = drm_client_open(client);
 	if (ret)
@@ -105,10 +101,6 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
 
 err_free:
 	drm_client_modeset_free(client);
-err_put_module:
-	if (funcs)
-		module_put(funcs->owner);
-
 	return ret;
 }
 EXPORT_SYMBOL(drm_client_init);
@@ -177,8 +169,6 @@ void drm_client_release(struct drm_client_dev *client)
 	drm_client_modeset_free(client);
 	drm_client_close(client);
 	drm_dev_put(dev);
-	if (client->funcs)
-		module_put(client->funcs->owner);
 }
 EXPORT_SYMBOL(drm_client_release);
 
-- 
2.42.0

[Intel-gfx] [PATCH v6 2/7] drm/client: Export drm_client_dev_unregister()

[Thomas Zimmermann]

Export drm_client_dev_unregister() for use by the i915 driver. The
driver does not use drm_dev_unregister(), so it has to clean up the
in-kernel DRM clients by itself.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_client.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 9403b3f576f7b..3d4f8b77d0789 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -172,6 +172,18 @@ void drm_client_release(struct drm_client_dev *client)
 }
 EXPORT_SYMBOL(drm_client_release);
 
+/**
+ * drm_client_dev_unregister - Unregister clients
+ * @dev: DRM device
+ *
+ * This function releases all clients by calling each client's
+ * &drm_client_funcs.unregister callback. The callback function
+ * is responsibe for releaseing all resources including the client
+ * itself.
+ *
+ * The helper drm_dev_unregister() calls this function. Drivers
+ * that use it don't need to call this function themselves.
+ */
 void drm_client_dev_unregister(struct drm_device *dev)
 {
 	struct drm_client_dev *client, *tmp;
@@ -191,6 +203,7 @@ void drm_client_dev_unregister(struct drm_device *dev)
 	}
 	mutex_unlock(&dev->clientlist_mutex);
 }
+EXPORT_SYMBOL(drm_client_dev_unregister);
 
 /**
  * drm_client_dev_hotplug - Send hotplug event to clients
-- 
2.42.0

[Intel-gfx] [PATCH v6 3/7] drm/i915: Unregister in-kernel clients

[Thomas Zimmermann]

Unregister all in-kernel clients before unloading the i915 driver. For
other drivers, drm_dev_unregister() does this automatically. As i915
does not use this helper, it has to perform the call by itself.

Note that there are currently no in-kernel clients in i915. The patch
prepares the driver for a related update of its fbdev support.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/i915_driver.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 80e85cadb9a26..f7b56dcc96a16 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -41,6 +41,7 @@
 
 #include <drm/drm_aperture.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_client.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
@@ -857,6 +858,8 @@ void i915_driver_remove(struct drm_i915_private *i915)
 {
 	intel_wakeref_t wakeref;
 
+	drm_client_dev_unregister(&i915->drm);
+
 	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
 
 	i915_driver_unregister(i915);
-- 
2.42.0

[Intel-gfx] [PATCH v6 4/7] drm/i915: Move fbdev functions

[Thomas Zimmermann]

Move functions within intel_fbdev.c to simplify later updates. Minor
style fixes to make checkpatch happy, but no functional changes.

v5:
	* style fixes (checkpatch)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 154 ++++++++++-----------
 1 file changed, 77 insertions(+), 77 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 31d0d695d5671..2695c65b55ddc 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -545,58 +545,6 @@ static void intel_fbdev_suspend_worker(struct work_struct *work)
 				true);
 }
 
-int intel_fbdev_init(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_fbdev *ifbdev;
-	int ret;
-
-	if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
-		return -ENODEV;
-
-	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
-	if (ifbdev == NULL)
-		return -ENOMEM;
-
-	mutex_init(&ifbdev->hpd_lock);
-	drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
-
-	if (intel_fbdev_init_bios(dev, ifbdev))
-		ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
-	else
-		ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
-
-	ret = drm_fb_helper_init(dev, &ifbdev->helper);
-	if (ret) {
-		kfree(ifbdev);
-		return ret;
-	}
-
-	dev_priv->display.fbdev.fbdev = ifbdev;
-	INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
-
-	return 0;
-}
-
-static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
-{
-	struct intel_fbdev *ifbdev = data;
-
-	/* Due to peculiar init order wrt to hpd handling this is separate. */
-	if (drm_fb_helper_initial_config(&ifbdev->helper))
-		intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
-}
-
-void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
-
-	if (!ifbdev)
-		return;
-
-	ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
-}
-
 static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
 {
 	if (!ifbdev->cookie)
@@ -607,31 +555,6 @@ static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
 	ifbdev->cookie = 0;
 }
 
-void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
-
-	if (!ifbdev)
-		return;
-
-	intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true);
-
-	if (!current_is_async())
-		intel_fbdev_sync(ifbdev);
-
-	drm_fb_helper_unregister_info(&ifbdev->helper);
-}
-
-void intel_fbdev_fini(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev);
-
-	if (!ifbdev)
-		return;
-
-	intel_fbdev_destroy(ifbdev);
-}
-
 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
  * processing, fbdev will perform a full connector reprobe if a hotplug event
  * was received while HPD was suspended.
@@ -748,6 +671,83 @@ void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
 		intel_fbdev_invalidate(ifbdev);
 }
 
+int intel_fbdev_init(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_fbdev *ifbdev;
+	int ret;
+
+	if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
+		return -ENODEV;
+
+	ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
+	if (!ifbdev)
+		return -ENOMEM;
+
+	mutex_init(&ifbdev->hpd_lock);
+	drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
+
+	if (intel_fbdev_init_bios(dev, ifbdev))
+		ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
+	else
+		ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
+
+	ret = drm_fb_helper_init(dev, &ifbdev->helper);
+	if (ret) {
+		kfree(ifbdev);
+		return ret;
+	}
+
+	dev_priv->display.fbdev.fbdev = ifbdev;
+	INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
+
+	return 0;
+}
+
+static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
+{
+	struct intel_fbdev *ifbdev = data;
+
+	/* Due to peculiar init order wrt to hpd handling this is separate. */
+	if (drm_fb_helper_initial_config(&ifbdev->helper))
+		intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
+}
+
+void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
+
+	if (!ifbdev)
+		return;
+
+	ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
+}
+
+void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
+
+	if (!ifbdev)
+		return;
+
+	intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true);
+
+	if (!current_is_async())
+		intel_fbdev_sync(ifbdev);
+
+	drm_fb_helper_unregister_info(&ifbdev->helper);
+}
+
+void intel_fbdev_fini(struct drm_i915_private *dev_priv)
+{
+	struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev);
+
+	if (!ifbdev)
+		return;
+
+	intel_fbdev_destroy(ifbdev);
+}
+
 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
 {
 	if (!fbdev || !fbdev->helper.fb)
-- 
2.42.0

[Intel-gfx] [PATCH v6 5/7] drm/i915: Initialize fbdev DRM client with callback functions

[Thomas Zimmermann]

Initialize i915's fbdev client by giving an instance of struct
drm_client_funcs to drm_client_init(). Also clean up with
drm_client_release().

Doing this in i915 prevents fbdev helpers from initializing and
releasing the client internally (see drm_fb_helper_init()). No
functional change yet; the client callbacks will be filled later.

v6:
	* rename client to "intel-fbdev" (Jouni)
v2:
	* call drm_fb_helper_unprepare() in error handling (Jani)
	* fix typo in commit message (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 43 ++++++++++++++++++++--
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 2695c65b55ddc..88c554ea7bb19 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -378,6 +378,7 @@ static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
 	if (ifbdev->fb)
 		drm_framebuffer_remove(&ifbdev->fb->base);
 
+	drm_client_release(&ifbdev->helper.client);
 	drm_fb_helper_unprepare(&ifbdev->helper);
 	kfree(ifbdev);
 }
@@ -671,6 +672,30 @@ void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
 		intel_fbdev_invalidate(ifbdev);
 }
 
+/*
+ * Fbdev client and struct drm_client_funcs
+ */
+
+static void intel_fbdev_client_unregister(struct drm_client_dev *client)
+{ }
+
+static int intel_fbdev_client_restore(struct drm_client_dev *client)
+{
+	return 0;
+}
+
+static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
+{
+	return 0;
+}
+
+static const struct drm_client_funcs intel_fbdev_client_funcs = {
+	.owner		= THIS_MODULE,
+	.unregister	= intel_fbdev_client_unregister,
+	.restore	= intel_fbdev_client_restore,
+	.hotplug	= intel_fbdev_client_hotplug,
+};
+
 int intel_fbdev_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -692,16 +717,26 @@ int intel_fbdev_init(struct drm_device *dev)
 	else
 		ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp;
 
+	ret = drm_client_init(dev, &ifbdev->helper.client, "intel-fbdev",
+			      &intel_fbdev_client_funcs);
+	if (ret)
+		goto err_drm_fb_helper_unprepare;
+
 	ret = drm_fb_helper_init(dev, &ifbdev->helper);
-	if (ret) {
-		kfree(ifbdev);
-		return ret;
-	}
+	if (ret)
+		goto err_drm_client_release;
 
 	dev_priv->display.fbdev.fbdev = ifbdev;
 	INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
 
 	return 0;
+
+err_drm_client_release:
+	drm_client_release(&ifbdev->helper.client);
+err_drm_fb_helper_unprepare:
+	drm_fb_helper_unprepare(&ifbdev->helper);
+	kfree(ifbdev);
+	return ret;
 }
 
 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
-- 
2.42.0

[Intel-gfx] [PATCH v6 6/7] drm/i915: Implement fbdev client callbacks

[Thomas Zimmermann]

Move code from ad-hoc fbdev callbacks into DRM client functions
and remove the old callbacks. The functions instruct the client
to poll for changed output or restore the display.

The DRM core calls both, the old callbacks and the new client
helpers, from the same places. The new functions perform the same
operation as before, so there's no change in functionality.

v6:
	* return errors from client callbacks (Jouni)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 .../drm/i915/display/intel_display_driver.c   |  1 -
 drivers/gpu/drm/i915/display/intel_fbdev.c    | 33 ++++++++++++++-----
 drivers/gpu/drm/i915/display/intel_fbdev.h    |  9 -----
 drivers/gpu/drm/i915/i915_driver.c            | 22 -------------
 4 files changed, 25 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
index 44b59ac301e69..ffdcddd1943e0 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -96,7 +96,6 @@ void intel_display_driver_init_hw(struct drm_i915_private *i915)
 static const struct drm_mode_config_funcs intel_mode_funcs = {
 	.fb_create = intel_user_framebuffer_create,
 	.get_format_info = intel_fb_get_format_info,
-	.output_poll_changed = intel_fbdev_output_poll_changed,
 	.mode_valid = intel_mode_valid,
 	.atomic_check = intel_atomic_check,
 	.atomic_commit = intel_atomic_commit,
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 88c554ea7bb19..2837791613608 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -638,13 +638,13 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous
 	intel_fbdev_hpd_set_suspend(dev_priv, state);
 }
 
-void intel_fbdev_output_poll_changed(struct drm_device *dev)
+static int intel_fbdev_output_poll_changed(struct drm_device *dev)
 {
 	struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
 	bool send_hpd;
 
 	if (!ifbdev)
-		return;
+		return -EINVAL;
 
 	intel_fbdev_sync(ifbdev);
 
@@ -655,21 +655,29 @@ void intel_fbdev_output_poll_changed(struct drm_device *dev)
 
 	if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
 		drm_fb_helper_hotplug_event(&ifbdev->helper);
+
+	return 0;
 }
 
-void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
+static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
 {
 	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
+	int ret;
 
 	if (!ifbdev)
-		return;
+		return -EINVAL;
 
 	intel_fbdev_sync(ifbdev);
 	if (!ifbdev->vma)
-		return;
+		return -ENOMEM;
 
-	if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
-		intel_fbdev_invalidate(ifbdev);
+	ret = drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper);
+	if (ret)
+		return ret;
+
+	intel_fbdev_invalidate(ifbdev);
+
+	return 0;
 }
 
 /*
@@ -681,12 +689,21 @@ static void intel_fbdev_client_unregister(struct drm_client_dev *client)
 
 static int intel_fbdev_client_restore(struct drm_client_dev *client)
 {
+	struct drm_i915_private *dev_priv = to_i915(client->dev);
+	int ret;
+
+	ret = intel_fbdev_restore_mode(dev_priv);
+	if (ret)
+		return ret;
+
+	vga_switcheroo_process_delayed_switch();
+
 	return 0;
 }
 
 static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
 {
-	return 0;
+	return intel_fbdev_output_poll_changed(client->dev);
 }
 
 static const struct drm_client_funcs intel_fbdev_client_funcs = {
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
index 04fd523a50232..8c953f102ba22 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.h
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -19,8 +19,6 @@ void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv);
 void intel_fbdev_unregister(struct drm_i915_private *dev_priv);
 void intel_fbdev_fini(struct drm_i915_private *dev_priv);
 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous);
-void intel_fbdev_output_poll_changed(struct drm_device *dev);
-void intel_fbdev_restore_mode(struct drm_i915_private *dev_priv);
 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev);
 #else
 static inline int intel_fbdev_init(struct drm_device *dev)
@@ -44,13 +42,6 @@ static inline void intel_fbdev_set_suspend(struct drm_device *dev, int state, bo
 {
 }
 
-static inline void intel_fbdev_output_poll_changed(struct drm_device *dev)
-{
-}
-
-static inline void intel_fbdev_restore_mode(struct drm_i915_private *i915)
-{
-}
 static inline struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
 {
 	return NULL;
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index f7b56dcc96a16..a69e132b62c4a 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -928,27 +928,6 @@ static int i915_driver_open(struct drm_device *dev, struct drm_file *file)
 	return 0;
 }
 
-/**
- * i915_driver_lastclose - clean up after all DRM clients have exited
- * @dev: DRM device
- *
- * Take care of cleaning up after all DRM clients have exited.  In the
- * mode setting case, we want to restore the kernel's initial mode (just
- * in case the last client left us in a bad state).
- *
- * Additionally, in the non-mode setting case, we'll tear down the GTT
- * and DMA structures, since the kernel won't be using them, and clea
- * up any GEM state.
- */
-static void i915_driver_lastclose(struct drm_device *dev)
-{
-	struct drm_i915_private *i915 = to_i915(dev);
-
-	intel_fbdev_restore_mode(i915);
-
-	vga_switcheroo_process_delayed_switch();
-}
-
 static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_i915_file_private *file_priv = file->driver_priv;
@@ -1824,7 +1803,6 @@ static const struct drm_driver i915_drm_driver = {
 	    DRIVER_SYNCOBJ_TIMELINE,
 	.release = i915_driver_release,
 	.open = i915_driver_open,
-	.lastclose = i915_driver_lastclose,
 	.postclose = i915_driver_postclose,
 	.show_fdinfo = PTR_IF(IS_ENABLED(CONFIG_PROC_FS), i915_drm_client_fdinfo),
 
-- 
2.42.0

[Intel-gfx] [PATCH v6 7/7] drm/i915: Implement fbdev emulation as in-kernel client

[Thomas Zimmermann]

Replace all code that initializes or releases fbdev emulation
throughout the driver. Instead initialize the fbdev client by a
single call to intel_fbdev_setup() after i915 has registered its
DRM device. Just like similar code in other drivers, i915 fbdev
emulation now acts like a regular DRM client.

The fbdev client setup consists of the initial preparation and the
hot-plugging of the display. The latter creates the fbdev device
and sets up the fbdev framebuffer. The setup performs display
hot-plugging once. If no display can be detected, DRM probe helpers
re-run the detection on each hotplug event.

A call to drm_dev_unregister() releases the client automatically.
No further action is required within i915. If the fbdev framebuffer
has been fully set up, struct fb_ops.fb_destroy implements the
release. For partially initialized emulation, the fbdev client
reverts the initial setup.

v6:
	* use 'i915' for i915 device (Jouni)
	* remove unnecessary code for non-atomic mode setting
	  (Jouni, Ville)
	* fix function name in commit message (Jouni)
v3:
	* as before, silently ignore devices without displays
v2:
	* let drm_client_register() handle initial hotplug
	* fix driver name in error message (Jani)
	* fix non-fbdev build (kernel test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/display/intel_display.c  |   1 -
 .../drm/i915/display/intel_display_driver.c   |  18 --
 drivers/gpu/drm/i915/display/intel_fbdev.c    | 177 ++++++++----------
 drivers/gpu/drm/i915/display/intel_fbdev.h    |  20 +-
 drivers/gpu/drm/i915/i915_driver.c            |   2 +
 5 files changed, 80 insertions(+), 138 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 28d85e1e858ea..7a8b50d6e52e1 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -82,7 +82,6 @@
 #include "intel_dvo.h"
 #include "intel_fb.h"
 #include "intel_fbc.h"
-#include "intel_fbdev.h"
 #include "intel_fdi.h"
 #include "intel_fifo_underrun.h"
 #include "intel_frontbuffer.h"
diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
index ffdcddd1943e0..213a4ee93ffc2 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -364,10 +364,6 @@ int intel_display_driver_probe(struct drm_i915_private *i915)
 
 	intel_overlay_setup(i915);
 
-	ret = intel_fbdev_init(&i915->drm);
-	if (ret)
-		return ret;
-
 	/* Only enable hotplug handling once the fbdev is fully set up. */
 	intel_hpd_init(i915);
 	intel_hpd_poll_disable(i915);
@@ -392,16 +388,6 @@ void intel_display_driver_register(struct drm_i915_private *i915)
 
 	intel_display_debugfs_register(i915);
 
-	/*
-	 * Some ports require correctly set-up hpd registers for
-	 * detection to work properly (leading to ghost connected
-	 * connector status), e.g. VGA on gm45.  Hence we can only set
-	 * up the initial fbdev config after hpd irqs are fully
-	 * enabled. We do it last so that the async config cannot run
-	 * before the connectors are registered.
-	 */
-	intel_fbdev_initial_config_async(i915);
-
 	/*
 	 * We need to coordinate the hotplugs with the asynchronous
 	 * fbdev configuration, for which we use the
@@ -445,9 +431,6 @@ void intel_display_driver_remove_noirq(struct drm_i915_private *i915)
 	 */
 	intel_hpd_poll_fini(i915);
 
-	/* poll work can call into fbdev, hence clean that up afterwards */
-	intel_fbdev_fini(i915);
-
 	intel_unregister_dsm_handler();
 
 	/* flush any delayed tasks or pending work */
@@ -484,7 +467,6 @@ void intel_display_driver_unregister(struct drm_i915_private *i915)
 	if (!HAS_DISPLAY(i915))
 		return;
 
-	intel_fbdev_unregister(i915);
 	intel_audio_deinit(i915);
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 2837791613608..023c71cabe477 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -24,7 +24,6 @@
  *     David Airlie
  */
 
-#include <linux/async.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
@@ -39,6 +38,7 @@
 #include <linux/vga_switcheroo.h>
 
 #include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_framebuffer_helper.h>
@@ -58,7 +58,6 @@ struct intel_fbdev {
 	struct intel_framebuffer *fb;
 	struct i915_vma *vma;
 	unsigned long vma_flags;
-	async_cookie_t cookie;
 	int preferred_bpp;
 
 	/* Whether or not fbdev hpd processing is temporarily suspended */
@@ -135,6 +134,26 @@ static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
 	return i915_gem_fb_mmap(obj, vma);
 }
 
+static void intel_fbdev_fb_destroy(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct intel_fbdev *ifbdev = container_of(fb_helper, struct intel_fbdev, helper);
+
+	drm_fb_helper_fini(&ifbdev->helper);
+
+	/*
+	 * We rely on the object-free to release the VMA pinning for
+	 * the info->screen_base mmaping. Leaking the VMA is simpler than
+	 * trying to rectify all the possible error paths leading here.
+	 */
+	intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
+	drm_framebuffer_remove(&ifbdev->fb->base);
+
+	drm_client_release(&fb_helper->client);
+	drm_fb_helper_unprepare(&ifbdev->helper);
+	kfree(ifbdev);
+}
+
 static const struct fb_ops intelfb_ops = {
 	.owner = THIS_MODULE,
 	__FB_DEFAULT_DEFERRED_OPS_RDWR(intel_fbdev),
@@ -144,6 +163,7 @@ static const struct fb_ops intelfb_ops = {
 	.fb_pan_display = intel_fbdev_pan_display,
 	__FB_DEFAULT_DEFERRED_OPS_DRAW(intel_fbdev),
 	.fb_mmap = intel_fbdev_mmap,
+	.fb_destroy = intel_fbdev_fb_destroy,
 };
 
 static int intelfb_alloc(struct drm_fb_helper *helper,
@@ -212,7 +232,6 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	struct intel_framebuffer *intel_fb = ifbdev->fb;
 	struct drm_device *dev = helper->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
 	struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt;
 	const struct i915_gtt_view view = {
 		.type = I915_GTT_VIEW_NORMAL,
@@ -337,7 +356,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	ifbdev->vma_flags = flags;
 
 	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
-	vga_switcheroo_client_fb_set(pdev, info);
+
 	return 0;
 
 out_unpin:
@@ -363,26 +382,6 @@ static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 	.fb_dirty = intelfb_dirty,
 };
 
-static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
-{
-	/* We rely on the object-free to release the VMA pinning for
-	 * the info->screen_base mmaping. Leaking the VMA is simpler than
-	 * trying to rectify all the possible error paths leading here.
-	 */
-
-	drm_fb_helper_fini(&ifbdev->helper);
-
-	if (ifbdev->vma)
-		intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags);
-
-	if (ifbdev->fb)
-		drm_framebuffer_remove(&ifbdev->fb->base);
-
-	drm_client_release(&ifbdev->helper.client);
-	drm_fb_helper_unprepare(&ifbdev->helper);
-	kfree(ifbdev);
-}
-
 /*
  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
  * The core display code will have read out the current plane configuration,
@@ -546,16 +545,6 @@ static void intel_fbdev_suspend_worker(struct work_struct *work)
 				true);
 }
 
-static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
-{
-	if (!ifbdev->cookie)
-		return;
-
-	/* Only serialises with all preceding async calls, hence +1 */
-	async_synchronize_cookie(ifbdev->cookie + 1);
-	ifbdev->cookie = 0;
-}
-
 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
  * processing, fbdev will perform a full connector reprobe if a hotplug event
  * was received while HPD was suspended.
@@ -646,8 +635,6 @@ static int intel_fbdev_output_poll_changed(struct drm_device *dev)
 	if (!ifbdev)
 		return -EINVAL;
 
-	intel_fbdev_sync(ifbdev);
-
 	mutex_lock(&ifbdev->hpd_lock);
 	send_hpd = !ifbdev->hpd_suspended;
 	ifbdev->hpd_waiting = true;
@@ -667,7 +654,6 @@ static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
 	if (!ifbdev)
 		return -EINVAL;
 
-	intel_fbdev_sync(ifbdev);
 	if (!ifbdev->vma)
 		return -ENOMEM;
 
@@ -685,7 +671,20 @@ static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
  */
 
 static void intel_fbdev_client_unregister(struct drm_client_dev *client)
-{ }
+{
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+	struct drm_device *dev = fb_helper->dev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+	if (fb_helper->info) {
+		vga_switcheroo_client_fb_set(pdev, NULL);
+		drm_fb_helper_unregister_info(fb_helper);
+	} else {
+		drm_fb_helper_unprepare(fb_helper);
+		drm_client_release(&fb_helper->client);
+		kfree(fb_helper);
+	}
+}
 
 static int intel_fbdev_client_restore(struct drm_client_dev *client)
 {
@@ -703,7 +702,31 @@ static int intel_fbdev_client_restore(struct drm_client_dev *client)
 
 static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
 {
-	return intel_fbdev_output_poll_changed(client->dev);
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+	struct drm_device *dev = client->dev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	int ret;
+
+	if (dev->fb_helper)
+		return intel_fbdev_output_poll_changed(dev);
+
+	ret = drm_fb_helper_init(dev, fb_helper);
+	if (ret)
+		goto err_drm_err;
+
+	ret = drm_fb_helper_initial_config(fb_helper);
+	if (ret)
+		goto err_drm_fb_helper_fini;
+
+	vga_switcheroo_client_fb_set(pdev, fb_helper->info);
+
+	return 0;
+
+err_drm_fb_helper_fini:
+	drm_fb_helper_fini(fb_helper);
+err_drm_err:
+	drm_err(dev, "Failed to setup i915 fbdev emulation (ret=%d)\n", ret);
+	return ret;
 }
 
 static const struct drm_client_funcs intel_fbdev_client_funcs = {
@@ -713,22 +736,23 @@ static const struct drm_client_funcs intel_fbdev_client_funcs = {
 	.hotplug	= intel_fbdev_client_hotplug,
 };
 
-int intel_fbdev_init(struct drm_device *dev)
+void intel_fbdev_setup(struct drm_i915_private *i915)
 {
-	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_device *dev = &i915->drm;
 	struct intel_fbdev *ifbdev;
 	int ret;
 
-	if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))
-		return -ENODEV;
+	if (!HAS_DISPLAY(i915))
+		return;
 
 	ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
 	if (!ifbdev)
-		return -ENOMEM;
-
-	mutex_init(&ifbdev->hpd_lock);
+		return;
 	drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);
 
+	i915->display.fbdev.fbdev = ifbdev;
+	INIT_WORK(&i915->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
+	mutex_init(&ifbdev->hpd_lock);
 	if (intel_fbdev_init_bios(dev, ifbdev))
 		ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
 	else
@@ -736,68 +760,19 @@ int intel_fbdev_init(struct drm_device *dev)
 
 	ret = drm_client_init(dev, &ifbdev->helper.client, "intel-fbdev",
 			      &intel_fbdev_client_funcs);
-	if (ret)
+	if (ret) {
+		drm_err(dev, "Failed to register client: %d\n", ret);
 		goto err_drm_fb_helper_unprepare;
+	}
 
-	ret = drm_fb_helper_init(dev, &ifbdev->helper);
-	if (ret)
-		goto err_drm_client_release;
-
-	dev_priv->display.fbdev.fbdev = ifbdev;
-	INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
+	drm_client_register(&ifbdev->helper.client);
 
-	return 0;
+	return;
 
-err_drm_client_release:
-	drm_client_release(&ifbdev->helper.client);
 err_drm_fb_helper_unprepare:
 	drm_fb_helper_unprepare(&ifbdev->helper);
+	mutex_destroy(&ifbdev->hpd_lock);
 	kfree(ifbdev);
-	return ret;
-}
-
-static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
-{
-	struct intel_fbdev *ifbdev = data;
-
-	/* Due to peculiar init order wrt to hpd handling this is separate. */
-	if (drm_fb_helper_initial_config(&ifbdev->helper))
-		intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
-}
-
-void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
-
-	if (!ifbdev)
-		return;
-
-	ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
-}
-
-void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev;
-
-	if (!ifbdev)
-		return;
-
-	intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true);
-
-	if (!current_is_async())
-		intel_fbdev_sync(ifbdev);
-
-	drm_fb_helper_unregister_info(&ifbdev->helper);
-}
-
-void intel_fbdev_fini(struct drm_i915_private *dev_priv)
-{
-	struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev);
-
-	if (!ifbdev)
-		return;
-
-	intel_fbdev_destroy(ifbdev);
 }
 
 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev)
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
index 8c953f102ba22..08de2d5b34338 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.h
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -14,27 +14,11 @@ struct intel_fbdev;
 struct intel_framebuffer;
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION
-int intel_fbdev_init(struct drm_device *dev);
-void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv);
-void intel_fbdev_unregister(struct drm_i915_private *dev_priv);
-void intel_fbdev_fini(struct drm_i915_private *dev_priv);
+void intel_fbdev_setup(struct drm_i915_private *dev_priv);
 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous);
 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev);
 #else
-static inline int intel_fbdev_init(struct drm_device *dev)
-{
-	return 0;
-}
-
-static inline void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv)
-{
-}
-
-static inline void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
-{
-}
-
-static inline void intel_fbdev_fini(struct drm_i915_private *dev_priv)
+static inline void intel_fbdev_setup(struct drm_i915_private *dev_priv)
 {
 }
 
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index a69e132b62c4a..a5243e8683c33 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -819,6 +819,8 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	i915->do_release = true;
 
+	intel_fbdev_setup(i915);
+
 	return 0;
 
 out_cleanup_gem:
-- 
2.42.0

[Intel-gfx] ✗ Fi.CI.SPARSE: warning for drm/i915: Convert fbdev to DRM client (rev6)

[Patchwork]

== Series Details ==

Series: drm/i915: Convert fbdev to DRM client (rev6)
URL   : https://patchwork.freedesktop.org/series/115714/
State : warning

== Summary ==

Error: dim sparse failed
Sparse version: v0.6.2
Fast mode used, each commit won't be checked separately.
+./arch/x86/include/asm/bitops.h:117:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:148:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:150:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:154:26: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:156:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:156:9: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:174:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:176:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:180:35: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:182:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:182:9: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:186:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:188:9: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:192:35: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:195:16: warning: unreplaced symbol 'oldbit'
+./arch/x86/include/asm/bitops.h:195:9: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:237:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:239:9: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:66:1: warning: unreplaced symbol 'return'
+./arch/x86/include/asm/bitops.h:92:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:100:17: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:100:23: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:100:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:105:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:107:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:108:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:109:9: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:111:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:111:14: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:111:20: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:112:17: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:112:23: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:112:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:121:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:128:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:166:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:168:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:169:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:170:9: warning: unreplaced symbol 'val'
+./include/asm-generic/bitops/generic-non-atomic.h:172:19: warning: unreplaced symbol 'val'
+./include/asm-generic/bitops/generic-non-atomic.h:172:25: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:172:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:28:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:30:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:31:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:33:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:33:16: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:37:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:39:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:40:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:42:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:42:16: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:55:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:57:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:58:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:60:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:60:15: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:73:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:75:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:76:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:77:9: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:79:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:79:14: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:79:20: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:80:17: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:80:23: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:80:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:93:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/generic-non-atomic.h:95:9: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/generic-non-atomic.h:96:9: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:97:9: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:99:10: warning: unreplaced symbol 'p'
+./include/asm-generic/bitops/generic-non-atomic.h:99:14: warning: unreplaced symbol 'old'
+./include/asm-generic/bitops/generic-non-atomic.h:99:21: warning: unreplaced symbol 'mask'
+./include/asm-generic/bitops/instrumented-non-atomic.h:100:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:112:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:115:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:127:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:130:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:139:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:142:9: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:26:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:42:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:58:1: warning: unreplaced symbol 'return'
+./include/asm-generic/bitops/instrumented-non-atomic.h:97:1: warning: unreplaced symbol 'return'

[Intel-gfx] ✗ Fi.CI.BAT: failure for drm/i915: Convert fbdev to DRM client (rev6)

[Patchwork]

[-- Attachment #1: Type: text/plain, Size: 13906 bytes --]

== Series Details ==

Series: drm/i915: Convert fbdev to DRM client (rev6)
URL   : https://patchwork.freedesktop.org/series/115714/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_13831 -> Patchwork_115714v6
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_115714v6 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_115714v6, please notify your bug team (lgci.bug.filing@intel.com) to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/index.html

Participating hosts (36 -> 38)
------------------------------

  Additional (4): fi-kbl-soraka fi-hsw-4770 bat-mtlp-8 bat-dg1-5 
  Missing    (2): bat-dg2-9 fi-snb-2520m 

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_115714v6:

### IGT changes ###

#### Possible regressions ####

  * igt@vgem_basic@unload:
    - fi-hsw-4770:        NOTRUN -> [INCOMPLETE][1]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-hsw-4770/igt@vgem_basic@unload.html

  
Known issues
------------

  Here are the changes found in Patchwork_115714v6 that come from known issues:

### CI changes ###

#### Possible fixes ####

  * boot:
    - fi-bsw-n3050:       [FAIL][2] ([i915#8293]) -> [PASS][3]
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13831/fi-bsw-n3050/boot.html
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-bsw-n3050/boot.html

  

### IGT changes ###

#### Issues hit ####

  * igt@debugfs_test@basic-hwmon:
    - bat-mtlp-8:         NOTRUN -> [SKIP][4] ([i915#9318])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@debugfs_test@basic-hwmon.html

  * igt@gem_huc_copy@huc-copy:
    - fi-kbl-soraka:      NOTRUN -> [SKIP][5] ([fdo#109271] / [i915#2190])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-kbl-soraka/igt@gem_huc_copy@huc-copy.html

  * igt@gem_lmem_swapping@basic:
    - fi-kbl-soraka:      NOTRUN -> [SKIP][6] ([fdo#109271] / [i915#4613]) +3 other tests skip
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-kbl-soraka/igt@gem_lmem_swapping@basic.html

  * igt@gem_lmem_swapping@random-engines:
    - fi-bsw-n3050:       NOTRUN -> [SKIP][7] ([fdo#109271]) +18 other tests skip
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-bsw-n3050/igt@gem_lmem_swapping@random-engines.html

  * igt@gem_lmem_swapping@verify-random:
    - bat-mtlp-8:         NOTRUN -> [SKIP][8] ([i915#4613]) +3 other tests skip
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@gem_lmem_swapping@verify-random.html

  * igt@gem_mmap@basic:
    - bat-dg1-5:          NOTRUN -> [SKIP][9] ([i915#4083])
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@gem_mmap@basic.html
    - bat-mtlp-8:         NOTRUN -> [SKIP][10] ([i915#4083])
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@gem_mmap@basic.html

  * igt@gem_mmap_gtt@basic:
    - bat-mtlp-8:         NOTRUN -> [SKIP][11] ([i915#4077]) +3 other tests skip
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@gem_mmap_gtt@basic.html

  * igt@gem_render_tiled_blits@basic:
    - bat-mtlp-8:         NOTRUN -> [SKIP][12] ([i915#4079]) +1 other test skip
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@gem_render_tiled_blits@basic.html

  * igt@gem_tiled_fence_blits@basic:
    - bat-dg1-5:          NOTRUN -> [SKIP][13] ([i915#4077]) +2 other tests skip
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@gem_tiled_fence_blits@basic.html

  * igt@gem_tiled_pread_basic:
    - bat-dg1-5:          NOTRUN -> [SKIP][14] ([i915#4079]) +1 other test skip
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@gem_tiled_pread_basic.html

  * igt@i915_pm_rps@basic-api:
    - bat-dg1-5:          NOTRUN -> [SKIP][15] ([i915#6621])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@i915_pm_rps@basic-api.html
    - bat-mtlp-8:         NOTRUN -> [SKIP][16] ([i915#6621])
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@i915_pm_rps@basic-api.html

  * igt@i915_selftest@live@gem_contexts:
    - bat-atsm-1:         [PASS][17] -> [INCOMPLETE][18] ([i915#9174])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13831/bat-atsm-1/igt@i915_selftest@live@gem_contexts.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-atsm-1/igt@i915_selftest@live@gem_contexts.html

  * igt@i915_selftest@live@gt_pm:
    - fi-kbl-soraka:      NOTRUN -> [DMESG-FAIL][19] ([i915#1886])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-kbl-soraka/igt@i915_selftest@live@gt_pm.html

  * igt@i915_suspend@basic-s3-without-i915:
    - bat-mtlp-8:         NOTRUN -> [SKIP][20] ([i915#6645])
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@i915_suspend@basic-s3-without-i915.html

  * igt@kms_addfb_basic@addfb25-y-tiled-small-legacy:
    - fi-hsw-4770:        NOTRUN -> [SKIP][21] ([fdo#109271] / [i915#5190])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-hsw-4770/igt@kms_addfb_basic@addfb25-y-tiled-small-legacy.html
    - bat-mtlp-8:         NOTRUN -> [SKIP][22] ([i915#5190])
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_addfb_basic@addfb25-y-tiled-small-legacy.html

  * igt@kms_addfb_basic@basic-x-tiled-legacy:
    - bat-dg1-5:          NOTRUN -> [SKIP][23] ([i915#4212]) +7 other tests skip
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_addfb_basic@basic-x-tiled-legacy.html

  * igt@kms_addfb_basic@basic-y-tiled-legacy:
    - bat-mtlp-8:         NOTRUN -> [SKIP][24] ([i915#4212]) +8 other tests skip
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_addfb_basic@basic-y-tiled-legacy.html
    - bat-dg1-5:          NOTRUN -> [SKIP][25] ([i915#4215])
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_addfb_basic@basic-y-tiled-legacy.html

  * igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy:
    - bat-mtlp-8:         NOTRUN -> [SKIP][26] ([i915#4213]) +1 other test skip
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy.html
    - bat-dg1-5:          NOTRUN -> [SKIP][27] ([i915#4103] / [i915#4213]) +1 other test skip
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-legacy.html

  * igt@kms_dsc@dsc-basic:
    - fi-kbl-soraka:      NOTRUN -> [SKIP][28] ([fdo#109271]) +9 other tests skip
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-kbl-soraka/igt@kms_dsc@dsc-basic.html
    - bat-mtlp-8:         NOTRUN -> [SKIP][29] ([i915#3555] / [i915#3840] / [i915#9159])
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_dsc@dsc-basic.html
    - bat-dg1-5:          NOTRUN -> [SKIP][30] ([i915#3555] / [i915#3840])
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_dsc@dsc-basic.html

  * igt@kms_force_connector_basic@force-load-detect:
    - bat-mtlp-8:         NOTRUN -> [SKIP][31] ([fdo#109285])
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_force_connector_basic@force-load-detect.html
    - bat-dg1-5:          NOTRUN -> [SKIP][32] ([fdo#109285])
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_force_connector_basic@force-load-detect.html

  * igt@kms_force_connector_basic@prune-stale-modes:
    - bat-mtlp-8:         NOTRUN -> [SKIP][33] ([i915#5274])
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_force_connector_basic@prune-stale-modes.html

  * igt@kms_hdmi_inject@inject-audio:
    - bat-dg1-5:          NOTRUN -> [SKIP][34] ([i915#433])
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_hdmi_inject@inject-audio.html
    - fi-bsw-n3050:       NOTRUN -> [FAIL][35] ([IGT#3])
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-bsw-n3050/igt@kms_hdmi_inject@inject-audio.html

  * igt@kms_pipe_crc_basic@compare-crc-sanitycheck-nv12@pipe-a-vga-1:
    - fi-hsw-4770:        NOTRUN -> [SKIP][36] ([fdo#109271]) +8 other tests skip
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-hsw-4770/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-nv12@pipe-a-vga-1.html

  * igt@kms_psr@sprite_plane_onoff:
    - bat-dg1-5:          NOTRUN -> [SKIP][37] ([i915#1072] / [i915#4078]) +3 other tests skip
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_psr@sprite_plane_onoff.html
    - fi-hsw-4770:        NOTRUN -> [SKIP][38] ([fdo#109271] / [i915#1072]) +3 other tests skip
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/fi-hsw-4770/igt@kms_psr@sprite_plane_onoff.html

  * igt@kms_setmode@basic-clone-single-crtc:
    - bat-dg1-5:          NOTRUN -> [SKIP][39] ([i915#3555])
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@kms_setmode@basic-clone-single-crtc.html
    - bat-mtlp-8:         NOTRUN -> [SKIP][40] ([i915#3555] / [i915#8809])
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@kms_setmode@basic-clone-single-crtc.html

  * igt@prime_vgem@basic-fence-mmap:
    - bat-mtlp-8:         NOTRUN -> [SKIP][41] ([i915#3708] / [i915#4077]) +1 other test skip
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@prime_vgem@basic-fence-mmap.html

  * igt@prime_vgem@basic-fence-read:
    - bat-mtlp-8:         NOTRUN -> [SKIP][42] ([i915#3708]) +2 other tests skip
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-mtlp-8/igt@prime_vgem@basic-fence-read.html
    - bat-dg1-5:          NOTRUN -> [SKIP][43] ([i915#3708]) +3 other tests skip
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@prime_vgem@basic-fence-read.html

  * igt@prime_vgem@basic-gtt:
    - bat-dg1-5:          NOTRUN -> [SKIP][44] ([i915#3708] / [i915#4077]) +1 other test skip
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/bat-dg1-5/igt@prime_vgem@basic-gtt.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [IGT#3]: https://gitlab.freedesktop.org/drm/igt-gpu-tools/issues/3
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109285]: https://bugs.freedesktop.org/show_bug.cgi?id=109285
  [i915#1072]: https://gitlab.freedesktop.org/drm/intel/issues/1072
  [i915#1886]: https://gitlab.freedesktop.org/drm/intel/issues/1886
  [i915#2190]: https://gitlab.freedesktop.org/drm/intel/issues/2190
  [i915#3555]: https://gitlab.freedesktop.org/drm/intel/issues/3555
  [i915#3708]: https://gitlab.freedesktop.org/drm/intel/issues/3708
  [i915#3840]: https://gitlab.freedesktop.org/drm/intel/issues/3840
  [i915#4077]: https://gitlab.freedesktop.org/drm/intel/issues/4077
  [i915#4078]: https://gitlab.freedesktop.org/drm/intel/issues/4078
  [i915#4079]: https://gitlab.freedesktop.org/drm/intel/issues/4079
  [i915#4083]: https://gitlab.freedesktop.org/drm/intel/issues/4083
  [i915#4103]: https://gitlab.freedesktop.org/drm/intel/issues/4103
  [i915#4212]: https://gitlab.freedesktop.org/drm/intel/issues/4212
  [i915#4213]: https://gitlab.freedesktop.org/drm/intel/issues/4213
  [i915#4215]: https://gitlab.freedesktop.org/drm/intel/issues/4215
  [i915#433]: https://gitlab.freedesktop.org/drm/intel/issues/433
  [i915#4613]: https://gitlab.freedesktop.org/drm/intel/issues/4613
  [i915#5190]: https://gitlab.freedesktop.org/drm/intel/issues/5190
  [i915#5274]: https://gitlab.freedesktop.org/drm/intel/issues/5274
  [i915#5354]: https://gitlab.freedesktop.org/drm/intel/issues/5354
  [i915#6621]: https://gitlab.freedesktop.org/drm/intel/issues/6621
  [i915#6645]: https://gitlab.freedesktop.org/drm/intel/issues/6645
  [i915#8293]: https://gitlab.freedesktop.org/drm/intel/issues/8293
  [i915#8809]: https://gitlab.freedesktop.org/drm/intel/issues/8809
  [i915#9159]: https://gitlab.freedesktop.org/drm/intel/issues/9159
  [i915#9174]: https://gitlab.freedesktop.org/drm/intel/issues/9174
  [i915#9318]: https://gitlab.freedesktop.org/drm/intel/issues/9318


Build changes
-------------

  * Linux: CI_DRM_13831 -> Patchwork_115714v6

  CI-20190529: 20190529
  CI_DRM_13831: 76cfd6fff7dfdf40e85e23c7deb727e633209b1f @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_7570: 1cd44e96b0419e00b9a09f8ead1369eab432d4f9 @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_115714v6: 76cfd6fff7dfdf40e85e23c7deb727e633209b1f @ git://anongit.freedesktop.org/gfx-ci/linux


### Linux commits

105524f15024 drm/i915: Implement fbdev emulation as in-kernel client
8b979b1a75f0 drm/i915: Implement fbdev client callbacks
b7fd8fe18288 drm/i915: Initialize fbdev DRM client with callback functions
436003d10060 drm/i915: Move fbdev functions
ccf1c583c3c5 drm/i915: Unregister in-kernel clients
77da08cc98d8 drm/client: Export drm_client_dev_unregister()
bad9a37d1dfd drm/client: Do not acquire module reference

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_115714v6/index.html

[-- Attachment #2: Type: text/html, Size: 17160 bytes --]

Re: [Intel-gfx] [PATCH v6 1/7] drm/client: Do not acquire module reference

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 2970 bytes --]



Am 02.11.23 um 14:08 schrieb Thomas Zimmermann:
> Do not acquire a reference on the module that provides a client's
> callback functions in drm_client_init(). The additional reference
> prevents the user from unloading the callback functions' module and
> thus creating dangling pointers.
> 
> This is only necessary if there is no direct dependency between the
> caller of drm_client_init() and the provider of the callbacks in
> struct drm_client_funcs. If this case ever existed, it has been
> removed from the DRM code. Callers of drm_client_init() also provide
> the callback implementation. The lifetime of the clients is tied to
> the dependency chain's outer-most module, which is the hardware's
> DRM driver. Before client helpers could be unloaded, the driver module
> would have to be unloaded, which also unregisters all clients.
> 
> Driver modules that set up DRM clients can now be unloaded.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Acked-by: Javier Martinez Canillas <javierm@redhat.com>

I've added this patch to drm-misc-next.

> ---
>   drivers/gpu/drm/drm_client.c | 12 +-----------
>   1 file changed, 1 insertion(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
> index c3027115d0552..9403b3f576f7b 100644
> --- a/drivers/gpu/drm/drm_client.c
> +++ b/drivers/gpu/drm/drm_client.c
> @@ -5,7 +5,6 @@
>   
>   #include <linux/iosys-map.h>
>   #include <linux/list.h>
> -#include <linux/module.h>
>   #include <linux/mutex.h>
>   #include <linux/seq_file.h>
>   #include <linux/slab.h>
> @@ -84,16 +83,13 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
>   	if (!drm_core_check_feature(dev, DRIVER_MODESET) || !dev->driver->dumb_create)
>   		return -EOPNOTSUPP;
>   
> -	if (funcs && !try_module_get(funcs->owner))
> -		return -ENODEV;
> -
>   	client->dev = dev;
>   	client->name = name;
>   	client->funcs = funcs;
>   
>   	ret = drm_client_modeset_create(client);
>   	if (ret)
> -		goto err_put_module;
> +		return ret;
>   
>   	ret = drm_client_open(client);
>   	if (ret)
> @@ -105,10 +101,6 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
>   
>   err_free:
>   	drm_client_modeset_free(client);
> -err_put_module:
> -	if (funcs)
> -		module_put(funcs->owner);
> -
>   	return ret;
>   }
>   EXPORT_SYMBOL(drm_client_init);
> @@ -177,8 +169,6 @@ void drm_client_release(struct drm_client_dev *client)
>   	drm_client_modeset_free(client);
>   	drm_client_close(client);
>   	drm_dev_put(dev);
> -	if (client->funcs)
> -		module_put(client->funcs->owner);
>   }
>   EXPORT_SYMBOL(drm_client_release);
>   

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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