* [PATCH] drm/atomic-helper: add unlocked disable all outputs helper
@ 2016-08-12 9:07 Lucas Stach
2016-08-15 21:13 ` Sean Paul
2016-10-04 16:38 ` Brian Starkey
0 siblings, 2 replies; 3+ messages in thread
From: Lucas Stach @ 2016-08-12 9:07 UTC (permalink / raw)
To: David Airlie; +Cc: dri-devel
This adds the unlocked variant of drm_atomic_helper_disable_all(),
which takes all the required modeset locks itself. This is intended
to be used when shutting down the driver, without retaining any
state.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
drivers/gpu/drm/drm_atomic_helper.c | 43 +++++++++++++++++++++++++++++++++++++
include/drm/drm_atomic_helper.h | 1 +
2 files changed, 44 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 99365087645b..6673021ab21e 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2435,6 +2435,49 @@ free:
EXPORT_SYMBOL(drm_atomic_helper_disable_all);
/**
+ * drm_atomic_helper_disable_all_unlocked - disable all currently active
+ * outputs taking the modeset locks itself
+ * @dev: DRM device
+ *
+ * Loops through all connectors, finding those that aren't turned off and then
+ * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
+ * that they are connected to.
+ *
+ * This is used for example when shutting down the DRM device.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ */
+int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev)
+{
+ struct drm_modeset_acquire_ctx ctx;
+ int err;
+
+ drm_modeset_acquire_init(&ctx, 0);
+
+retry:
+ err = drm_modeset_lock_all_ctx(dev, &ctx);
+ if (err < 0)
+ goto unlock;
+
+ err = drm_atomic_helper_disable_all(dev, &ctx);
+ if (err < 0)
+ goto unlock;
+
+unlock:
+ if (err == -EDEADLK) {
+ drm_modeset_backoff(&ctx);
+ goto retry;
+ }
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
+
+ return err;
+}
+EXPORT_SYMBOL(drm_atomic_helper_disable_all_unlocked);
+
+/**
* drm_atomic_helper_suspend - subsystem-level suspend helper
* @dev: DRM device
*
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index d86ae5dcd7b4..104d310c2c70 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -99,6 +99,7 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set,
int drm_atomic_helper_disable_all(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx);
+int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev);
struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
int drm_atomic_helper_resume(struct drm_device *dev,
struct drm_atomic_state *state);
--
2.8.1
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^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] drm/atomic-helper: add unlocked disable all outputs helper
2016-08-12 9:07 [PATCH] drm/atomic-helper: add unlocked disable all outputs helper Lucas Stach
@ 2016-08-15 21:13 ` Sean Paul
2016-10-04 16:38 ` Brian Starkey
1 sibling, 0 replies; 3+ messages in thread
From: Sean Paul @ 2016-08-15 21:13 UTC (permalink / raw)
To: Lucas Stach; +Cc: dri-devel
On Fri, Aug 12, 2016 at 5:07 AM, Lucas Stach <l.stach@pengutronix.de> wrote:
> This adds the unlocked variant of drm_atomic_helper_disable_all(),
> which takes all the required modeset locks itself. This is intended
> to be used when shutting down the driver, without retaining any
> state.
>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
So I suppose this is the atomic equivalent of
drm_crtc_force_disable_all? Should you perhaps update the legacy
helper to call this new function?
Sean
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 43 +++++++++++++++++++++++++++++++++++++
> include/drm/drm_atomic_helper.h | 1 +
> 2 files changed, 44 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 99365087645b..6673021ab21e 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -2435,6 +2435,49 @@ free:
> EXPORT_SYMBOL(drm_atomic_helper_disable_all);
>
> /**
> + * drm_atomic_helper_disable_all_unlocked - disable all currently active
> + * outputs taking the modeset locks itself
> + * @dev: DRM device
> + *
> + * Loops through all connectors, finding those that aren't turned off and then
> + * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
> + * that they are connected to.
> + *
> + * This is used for example when shutting down the DRM device.
> + *
> + * Returns:
> + * 0 on success or a negative error code on failure.
> + */
> +int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev)
> +{
> + struct drm_modeset_acquire_ctx ctx;
> + int err;
> +
> + drm_modeset_acquire_init(&ctx, 0);
> +
> +retry:
> + err = drm_modeset_lock_all_ctx(dev, &ctx);
> + if (err < 0)
> + goto unlock;
> +
> + err = drm_atomic_helper_disable_all(dev, &ctx);
> + if (err < 0)
> + goto unlock;
> +
> +unlock:
> + if (err == -EDEADLK) {
> + drm_modeset_backoff(&ctx);
> + goto retry;
> + }
> +
> + drm_modeset_drop_locks(&ctx);
> + drm_modeset_acquire_fini(&ctx);
> +
> + return err;
> +}
> +EXPORT_SYMBOL(drm_atomic_helper_disable_all_unlocked);
> +
> +/**
> * drm_atomic_helper_suspend - subsystem-level suspend helper
> * @dev: DRM device
> *
> diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> index d86ae5dcd7b4..104d310c2c70 100644
> --- a/include/drm/drm_atomic_helper.h
> +++ b/include/drm/drm_atomic_helper.h
> @@ -99,6 +99,7 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set,
>
> int drm_atomic_helper_disable_all(struct drm_device *dev,
> struct drm_modeset_acquire_ctx *ctx);
> +int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev);
> struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
> int drm_atomic_helper_resume(struct drm_device *dev,
> struct drm_atomic_state *state);
> --
> 2.8.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] drm/atomic-helper: add unlocked disable all outputs helper
2016-08-12 9:07 [PATCH] drm/atomic-helper: add unlocked disable all outputs helper Lucas Stach
2016-08-15 21:13 ` Sean Paul
@ 2016-10-04 16:38 ` Brian Starkey
1 sibling, 0 replies; 3+ messages in thread
From: Brian Starkey @ 2016-10-04 16:38 UTC (permalink / raw)
To: Lucas Stach; +Cc: dri-devel
Hi Lucas,
On Fri, Aug 12, 2016 at 11:07:14AM +0200, Lucas Stach wrote:
>This adds the unlocked variant of drm_atomic_helper_disable_all(),
>which takes all the required modeset locks itself. This is intended
>to be used when shutting down the driver, without retaining any
>state.
>
Is this meant to be analogous to:
drm_for_each_plane(plane, dev)
drm_plane_force_disable(plane);
drm_for_each_crtc(crtc, dev)
drm_crtc_force_disable(crtc);
?
I may have misunderstood the intention here, but it seems like this
patch only disables the outputs and doesn't disable planes or
remove their framebuffers (which I think we'd want for driver
shutdown).
Thanks,
Brian
>Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
>---
> drivers/gpu/drm/drm_atomic_helper.c | 43 +++++++++++++++++++++++++++++++++++++
> include/drm/drm_atomic_helper.h | 1 +
> 2 files changed, 44 insertions(+)
>
>diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
>index 99365087645b..6673021ab21e 100644
>--- a/drivers/gpu/drm/drm_atomic_helper.c
>+++ b/drivers/gpu/drm/drm_atomic_helper.c
>@@ -2435,6 +2435,49 @@ free:
> EXPORT_SYMBOL(drm_atomic_helper_disable_all);
>
> /**
>+ * drm_atomic_helper_disable_all_unlocked - disable all currently active
>+ * outputs taking the modeset locks itself
>+ * @dev: DRM device
>+ *
>+ * Loops through all connectors, finding those that aren't turned off and then
>+ * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
>+ * that they are connected to.
>+ *
>+ * This is used for example when shutting down the DRM device.
>+ *
>+ * Returns:
>+ * 0 on success or a negative error code on failure.
>+ */
>+int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev)
>+{
>+ struct drm_modeset_acquire_ctx ctx;
>+ int err;
>+
>+ drm_modeset_acquire_init(&ctx, 0);
>+
>+retry:
>+ err = drm_modeset_lock_all_ctx(dev, &ctx);
>+ if (err < 0)
>+ goto unlock;
>+
>+ err = drm_atomic_helper_disable_all(dev, &ctx);
>+ if (err < 0)
>+ goto unlock;
>+
>+unlock:
>+ if (err == -EDEADLK) {
>+ drm_modeset_backoff(&ctx);
>+ goto retry;
>+ }
>+
>+ drm_modeset_drop_locks(&ctx);
>+ drm_modeset_acquire_fini(&ctx);
>+
>+ return err;
>+}
>+EXPORT_SYMBOL(drm_atomic_helper_disable_all_unlocked);
>+
>+/**
> * drm_atomic_helper_suspend - subsystem-level suspend helper
> * @dev: DRM device
> *
>diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
>index d86ae5dcd7b4..104d310c2c70 100644
>--- a/include/drm/drm_atomic_helper.h
>+++ b/include/drm/drm_atomic_helper.h
>@@ -99,6 +99,7 @@ int __drm_atomic_helper_set_config(struct drm_mode_set *set,
>
> int drm_atomic_helper_disable_all(struct drm_device *dev,
> struct drm_modeset_acquire_ctx *ctx);
>+int drm_atomic_helper_disable_all_unlocked(struct drm_device *dev);
> struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
> int drm_atomic_helper_resume(struct drm_device *dev,
> struct drm_atomic_state *state);
>--
>2.8.1
>
>_______________________________________________
>dri-devel mailing list
>dri-devel@lists.freedesktop.org
>https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-08-12 9:07 [PATCH] drm/atomic-helper: add unlocked disable all outputs helper Lucas Stach
2016-08-15 21:13 ` Sean Paul
2016-10-04 16:38 ` Brian Starkey
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