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
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