/*
 * da7219-aad.h - DA7322 ASoC Codec AAD Driver Platform Data
 *
 * Copyright (c) 2015 Dialog Semiconductor Ltd.
 *
 * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef __DA7219_AAD_PDATA_H
#define __DA7219_AAD_PDATA_H

enum da7219_aad_micbias_pulse_lvl {
	DA7219_AAD_MICBIAS_PULSE_LVL_OFF = 0,
	DA7219_AAD_MICBIAS_PULSE_LVL_2_8V = 6,
	DA7219_AAD_MICBIAS_PULSE_LVL_2_9V,
};

enum da7219_aad_btn_cfg {
	DA7219_AAD_BTN_CFG_2MS = 1,
	DA7219_AAD_BTN_CFG_5MS,
	DA7219_AAD_BTN_CFG_10MS,
	DA7219_AAD_BTN_CFG_50MS,
	DA7219_AAD_BTN_CFG_100MS,
	DA7219_AAD_BTN_CFG_200MS,
	DA7219_AAD_BTN_CFG_500MS,
};

enum da7219_aad_mic_det_thr {
	DA7219_AAD_MIC_DET_THR_200_OHMS = 0,
	DA7219_AAD_MIC_DET_THR_500_OHMS,
	DA7219_AAD_MIC_DET_THR_750_OHMS,
	DA7219_AAD_MIC_DET_THR_1000_OHMS,
};

enum da7219_aad_jack_ins_deb {
	DA7219_AAD_JACK_INS_DEB_5MS = 0,
	DA7219_AAD_JACK_INS_DEB_10MS,
	DA7219_AAD_JACK_INS_DEB_20MS,
	DA7219_AAD_JACK_INS_DEB_50MS,
	DA7219_AAD_JACK_INS_DEB_100MS,
	DA7219_AAD_JACK_INS_DEB_200MS,
	DA7219_AAD_JACK_INS_DEB_500MS,
	DA7219_AAD_JACK_INS_DEB_1S,
};

enum da7219_aad_jack_det_rate {
	DA7219_AAD_JACK_DET_RATE_32_64MS = 0,
	DA7219_AAD_JACK_DET_RATE_64_128MS,
	DA7219_AAD_JACK_DET_RATE_128_256MS,
	DA7219_AAD_JACK_DET_RATE_256_512MS,
};

enum da7219_aad_jack_rem_deb {
	DA7219_AAD_JACK_REM_DEB_1MS = 0,
	DA7219_AAD_JACK_REM_DEB_5MS,
	DA7219_AAD_JACK_REM_DEB_10MS,
	DA7219_AAD_JACK_REM_DEB_20MS,
};

enum da7219_aad_btn_avg {
	DA7219_AAD_BTN_AVG_1 = 0,
	DA7219_AAD_BTN_AVG_2,
	DA7219_AAD_BTN_AVG_4,
	DA7219_AAD_BTN_AVG_8,
};

enum da7219_aad_adc_1bit_rpt {
	DA7219_AAD_ADC_1BIT_RPT_1 = 0,
	DA7219_AAD_ADC_1BIT_RPT_2,
	DA7219_AAD_ADC_1BIT_RPT_4,
	DA7219_AAD_ADC_1BIT_RPT_8,
};

struct da7219_aad_pdata {
	int irq;

	enum da7219_aad_micbias_pulse_lvl micbias_pulse_lvl;
	u32 micbias_pulse_time;
	enum da7219_aad_btn_cfg btn_cfg;
	enum da7219_aad_mic_det_thr mic_det_thr;
	enum da7219_aad_jack_ins_deb jack_ins_deb;
	enum da7219_aad_jack_det_rate jack_det_rate;
	enum da7219_aad_jack_rem_deb jack_rem_deb;

	u8 a_d_btn_thr;
	u8 d_b_btn_thr;
	u8 b_c_btn_thr;
	u8 c_mic_btn_thr;

	enum da7219_aad_btn_avg btn_avg;
	enum da7219_aad_adc_1bit_rpt adc_1bit_rpt;
};

#endif /* __DA7219_AAD_PDATA_H */
ue='range'>range</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/core?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>core</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/core/oss?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>oss</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/core/oss/io.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>io.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='39cb2c9a316e77f6dfba96c543e55b6672d5a37e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-29 13:50:06 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-29 13:50:06 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/core/oss/io.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>39cb2c9a316e77f6dfba96c543e55b6672d5a37e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/core/oss/io.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>98fe974ee4e20121253de7f61fc8d01bdb3821c1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/core/oss/io.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>sound/core/oss/io.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/core/oss/io.c?id=2c5d9555d6d937966d79d4c6529a5f7b9206e405'>2c5d9555d6d937966d79d4c6529a5f7b9206e405</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/core/oss/io.c?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e&amp;id2=2c5d9555d6d937966d79d4c6529a5f7b9206e405'>diff</a>)</td></tr></table>
<div class='commit-subject'>drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()</div><div class='commit-msg'>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 &lt;daniel.vetter@intel.com&gt;
Cc: Jani Nikula &lt;jani.nikula@linux.intel.com&gt;
Cc: Ville Syrjälä &lt;ville.syrjala@linux.intel.com&gt;
Cc: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Maarten Lankhorst &lt;maarten.lankhorst@linux.intel.com&gt;
Cc: Tvrtko Ursulin &lt;tvrtko.ursulin@intel.com&gt;
Cc: Imre Deak &lt;imre.deak@intel.com&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=39cb2c9a316e77f6dfba96c543e55b6672d5a37e'>Diffstat</a> (limited to 'sound/core/oss/io.c')</div><table summary='diffstat' class='diffstat'>