Lukas Wunner
d006d9047c
drm: Allow determining if current task is output poll worker ...
commit 25c058ccaf2ebbc3e250ec1e199e161f91fe27d4 upstream.
Introduce a helper to determine if the current task is an output poll
worker.
This allows us to fix a long-standing deadlock in several DRM drivers
wherein the ->runtime_suspend callback waits for the output poll worker
to finish and the worker in turn calls a ->detect callback which waits
for runtime suspend to finish. The ->detect callback is invoked from
multiple call sites and waiting for runtime suspend to finish is the
correct thing to do except if it's executing in the context of the
worker.
v2: Expand kerneldoc to specifically mention deadlock between
output poll worker and autosuspend worker as use case. (Lyude)
Cc: Dave Airlie <airlied@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://patchwork.freedesktop.org/patch/msgid/3549ce32e7f1467102e70d3e9cbf70c46bfe108e.1518593424.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-18 11:18:48 +01:00
drm/bridge: analogix_dp: Add analogix_dp_psr_supported
2016-10-04 08:23:16 +02:00
drm/i2c: tda998x: Register ASoC hdmi-codec and add audio DT binding
2016-09-07 13:10:10 +01:00
drm/ttm, drm/vmwgfx: Relax permission checking when opening surfaces
2017-04-12 12:41:10 +02:00
drm: Move legacy buffer structures to <drm/drm_legacy.h>
2014-09-12 15:28:12 +02:00
drm: Give drm_agp_clear drm_legacy_ prefix
2016-04-27 08:41:34 +02:00
drm: Extract drm_plane.[hc]
2016-09-22 00:01:56 -07:00
drm/fence: allow fence waiting to be interrupted by userspace
2016-09-12 16:59:15 -04:00
drm: document drm_auth.c
2016-06-21 22:10:55 +02:00
drm: Fix plane type uabi breakage
2016-09-22 23:52:12 -07:00
drm: Extract drm_bridge.h
2016-09-19 15:04:15 +02:00
drm: Loongson-3 doesn't fully support wc memory
2016-04-22 10:24:11 +10:00
drm/doc: Document color space handling
2016-09-22 00:04:03 -07:00
drm: prevent double-(un)registration for connectors
2017-06-17 06:41:53 +02:00
drm/crtc: constify drm_crtc_index parameter
2016-10-10 17:28:58 +02:00
drm: Allow determining if current task is output poll worker
2018-03-18 11:18:48 +01:00
drm/edid: add displayid detailed 1 timings to the modelist. (v1.1)
2016-05-23 11:35:31 +10:00
drm: Add helper for DP++ adaptors
2016-05-23 11:10:46 +03:00
drm: Add DP branch device info on debugfs
2016-09-15 14:51:07 +03:00
drm/dp-mst: Missing kernel doc
2016-07-19 10:31:53 +02:00
drm: Move all decl for drm_edid.c to drm_edid.h
2016-09-19 15:04:32 +02:00
drm: Move a few macros away from drm_crtc.h
2016-09-19 15:03:46 +02:00
drm: Constify drm_encoder_slave_funcs
2015-12-15 13:41:17 +01:00
drm/fb_cma_helper: add suspend helper
2016-06-18 18:33:54 -07:00
drm/fb-helper: fix sphinx markup for DRM_FB_HELPER_DEFAULT_OPS
2016-10-10 11:19:42 +02:00
drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil
2016-02-05 15:23:48 +10:00
drm: flip-work: change drm_flip_work_init prototype
2014-11-15 09:29:14 +10:00
drm: move drm_mode_legacy_fb_format to drm_fourcc.c
2016-08-29 15:37:28 +02:00
drm: Move a few macros away from drm_crtc.h
2016-09-19 15:03:46 +02:00
drm/doc: Fix more kerneldoc/sphinx warnings
2016-08-16 16:09:58 +02:00
drm/cma: Introduce drm_gem_cma_dumb_create_internal()
2014-11-13 13:27:17 +01:00
drm: Add a hash-tab rcu-safe API
2012-11-28 18:36:05 +10:00
drm: Extract&Document drm_irq.h
2016-07-19 10:29:47 +02:00
drm: document drm_auth.c
2016-06-21 22:10:55 +02:00
drm,i915: Introduce drm_malloc_gfp()
2016-04-11 17:13:10 +01:00
drm/dsi: Implement DCS set/get display brightness
2016-08-24 13:34:00 +02:00
drm: Track drm_mm nodes with an interval tree
2016-08-08 10:05:16 +02:00
drm: Extract drm_bridge.h
2016-09-19 15:04:15 +02:00
drm: Extract drm_bridge.h
2016-09-19 15:04:15 +02:00
drm/kms-helpers: Extract drm_modeset_helper.[hc]
2016-08-16 16:10:19 +02:00
drm/atomic-helper: Add atomic_disable CRTC helper callback
2016-08-29 10:21:52 +02:00
drm: Implement drm_modeset_lock_all_ctx()
2015-12-02 23:10:59 +01:00
drm: add drm_of_encoder_active_endpoint helpers
2016-02-10 14:19:21 +01:00
drm: Kill DRM_SUSER
2013-12-18 11:35:45 +10:00
drm/panel: Flesh out kerneldoc
2016-05-06 16:04:48 +02:00
drm/radeon: add new OLAND pci id
2015-08-12 12:24:05 -04:00
drm: Don't force all planes to be added to the state due to zpos
2016-10-26 18:48:05 +02:00
drm/kms-helpers: Extract drm_modeset_helper.[hc]
2016-08-16 16:10:19 +02:00
drm: Move a few macros away from drm_crtc.h
2016-09-19 15:03:46 +02:00
drm: Add "prefix" parameter to drm_rect_debug_print()
2015-11-24 11:47:46 +01:00
drm: simple_kms_helper: Add prepare_fb and cleanup_fb hooks
2016-10-05 15:18:02 +02:00
drm: use drm_file to tag vm-bos
2016-09-19 11:22:08 +02:00
drm: Don't race connector registration
2017-06-17 06:41:53 +02:00
drm/gma500: Remove unused ioctls
2014-03-17 20:11:57 +01:00
drm/i915: Add get_eld audio component
2015-12-10 13:39:27 +01:00
drm: avoid "possible bad bitmask?" warning
2016-08-09 22:18:26 +02:00
drm/i915: more .is_mobile cleanups for BDW
2017-04-12 12:41:18 +02:00
drm/i915: Add support for mapping an object page by page
2016-06-13 10:03:54 +01:00
d006d9047c