diff options
author | Thomas Zimmermann <tzimmermann@suse.de> | 2024-10-14 10:55:21 +0200 |
---|---|---|
committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-10-18 09:23:03 +0200 |
commit | bf17766f108309027aac2bfe184df6088dfd7384 (patch) | |
tree | 45291dfe9d14f72c3e47c37105572b41bc91017b /drivers/gpu/drm/drm_fbdev_client.c | |
parent | df7e8b522a6090162ecb50fd298ebc4db137562b (diff) |
drm/client: Move suspend/resume into DRM client callbacks
Suspend and resume is still tied to fbdev emulation. Modeset helpers
and several drivers call drm_fb_helper_set_suspend_unlocked() to inform
the fbdev client about suspend/resume events.
To make it work with arbitrary clients, add per-client callback
functions for suspend and resume. Implement them for fbdev emulation
with the existing drm_fb_helper_set_suspend_unlocked(). Then update
DRM's modeset helpers to call the new interface.
Clients that are not fbdev can now implement suspend/resume to their
requirements.
The callback parameter holds_console_lock is a workaround for i915,
radeon and xe, which possibly call the interface while having the
console lock acquired. Even though the commit doesn't modify these
drivers, it already adds the flag to avoid churn later on. New code
should not hold the console lock.
v4:
- clarify holds_console_lock in commit description (Jonathan)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241014085740.582287-8-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_fbdev_client.c')
-rw-r--r-- | drivers/gpu/drm/drm_fbdev_client.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_fbdev_client.c b/drivers/gpu/drm/drm_fbdev_client.c index a09382afe2fb..246fb63ab250 100644 --- a/drivers/gpu/drm/drm_fbdev_client.c +++ b/drivers/gpu/drm/drm_fbdev_client.c @@ -61,11 +61,37 @@ err_drm_err: return ret; } +static int drm_fbdev_client_suspend(struct drm_client_dev *client, bool holds_console_lock) +{ + struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); + + if (holds_console_lock) + drm_fb_helper_set_suspend(fb_helper, true); + else + drm_fb_helper_set_suspend_unlocked(fb_helper, true); + + return 0; +} + +static int drm_fbdev_client_resume(struct drm_client_dev *client, bool holds_console_lock) +{ + struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); + + if (holds_console_lock) + drm_fb_helper_set_suspend(fb_helper, false); + else + drm_fb_helper_set_suspend_unlocked(fb_helper, false); + + return 0; +} + static const struct drm_client_funcs drm_fbdev_client_funcs = { .owner = THIS_MODULE, .unregister = drm_fbdev_client_unregister, .restore = drm_fbdev_client_restore, .hotplug = drm_fbdev_client_hotplug, + .suspend = drm_fbdev_client_suspend, + .resume = drm_fbdev_client_resume, }; /** @@ -76,8 +102,8 @@ static const struct drm_client_funcs drm_fbdev_client_funcs = { * * This function sets up fbdev emulation. Restore, hotplug events and * teardown are all taken care of. Drivers that do suspend/resume need - * to call drm_fb_helper_set_suspend_unlocked() themselves. Simple - * drivers might use drm_mode_config_helper_suspend(). + * to call drm_client_dev_suspend() and drm_client_dev_resume() by + * themselves. Simple drivers might use drm_mode_config_helper_suspend(). * * This function is safe to call even when there are no connectors present. * Setup will be retried on the next hotplug event. |