/* * cs42l42.h -- CS42L42 ALSA SoC audio driver DT bindings header * * Copyright 2016 Cirrus Logic, Inc. * * Author: James Schulman * Author: Brian Austin * Author: Michael White * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #ifndef __DT_CS42L42_H #define __DT_CS42L42_H /* HPOUT Load Capacity */ #define CS42L42_HPOUT_LOAD_1NF 0 #define CS42L42_HPOUT_LOAD_10NF 1 /* HPOUT Clamp to GND Overide */ #define CS42L42_HPOUT_CLAMP_EN 0 #define CS42L42_HPOUT_CLAMP_DIS 1 /* Tip Sense Inversion */ #define CS42L42_TS_INV_DIS 0 #define CS42L42_TS_INV_EN 1 /* Tip Sense Debounce */ #define CS42L42_TS_DBNCE_0 0 #define CS42L42_TS_DBNCE_125 1 #define CS42L42_TS_DBNCE_250 2 #define CS42L42_TS_DBNCE_500 3 #define CS42L42_TS_DBNCE_750 4 #define CS42L42_TS_DBNCE_1000 5 #define CS42L42_TS_DBNCE_1250 6 #define CS42L42_TS_DBNCE_1500 7 /* Button Press Software Debounce Times */ #define CS42L42_BTN_DET_INIT_DBNCE_MIN 0 #define CS42L42_BTN_DET_INIT_DBNCE_DEFAULT 100 #define CS42L42_BTN_DET_INIT_DBNCE_MAX 200 #define CS42L42_BTN_DET_EVENT_DBNCE_MIN 0 #define CS42L42_BTN_DET_EVENT_DBNCE_DEFAULT 10 #define CS42L42_BTN_DET_EVENT_DBNCE_MAX 20 /* Button Detect Level Sensitivities */ #define CS42L42_NUM_BIASES 4 #define CS42L42_HS_DET_LEVEL_15 0x0F #define CS42L42_HS_DET_LEVEL_8 0x08 #define CS42L42_HS_DET_LEVEL_4 0x04 #define CS42L42_HS_DET_LEVEL_1 0x01 #define CS42L42_HS_DET_LEVEL_MIN 0 #define CS42L42_HS_DET_LEVEL_MAX 0x3F /* HS Bias Ramp Rate */ #define CS42L42_HSBIAS_RAMP_FAST_RISE_SLOW_FALL 0 #define CS42L42_HSBIAS_RAMP_FAST 1 #define CS42L42_HSBIAS_RAMP_SLOW 2 #define CS42L42_HSBIAS_RAMP_SLOWEST 3 #define CS42L42_HSBIAS_RAMP_TIME0 10 #define CS42L42_HSBIAS_RAMP_TIME1 40 #define CS42L42_HSBIAS_RAMP_TIME2 90 #define CS42L42_HSBIAS_RAMP_TIME3 170 #endif /* __DT_CS42L42_H */ f6dfba96c543e55b6672d5a37e'>commitdiff
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authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
commit39cb2c9a316e77f6dfba96c543e55b6672d5a37e (patch)
tree98fe974ee4e20121253de7f61fc8d01bdb3821c1 /include/soc/imx
parent2c5d9555d6d937966d79d4c6529a5f7b9206e405 (diff)
drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()
I've seen this trigger twice now, where the i915_gem_object_to_ggtt() call in intel_unpin_fb_obj() returns NULL, resulting in an oops immediately afterwards as the (inlined) call to i915_vma_unpin_fence() tries to dereference it. It seems to be some race condition where the object is going away at shutdown time, since both times happened when shutting down the X server. The call chains were different: - VT ioctl(KDSETMODE, KD_TEXT): intel_cleanup_plane_fb+0x5b/0xa0 [i915] drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper] intel_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/soc/imx')