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linux/sound/pci/hda
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Takashi Iwai a8d7bde23e ALSA: hda - Force polling mode on CFL for fixing codec communication 
We've observed too long probe time with Coffee Lake (CFL) machines,
and the likely cause is some communication problem between the
HD-audio controller and the codec chips.  While the controller expects
an IRQ wakeup for each codec response, it seems sometimes missing, and
it takes one second for the controller driver to time out and read the
response in the polling mode.

Although we aren't sure about the real culprit yet, in this patch, we
put a workaround by forcing the polling mode as default for CFL
machines; the polling mode itself isn't too heavy, and much better
than other workarounds initially suggested (e.g. disabling
power-save), at least.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199007
Fixes: e79b0006c4 ("ALSA: hda - Add Coffelake PCI ID")
Reported-and-tested-by: Hui Wang <hui.wang@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-03-21 10:23:07 +01:00
..
ca0132_regs.h ALSA: hda: ca0132_regs.h: Fix typo in include guard 2014-08-22 11:24:11 +02:00
dell_wmi_helper.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hda_auto_parser.c ALSA: hda - A new flag to enforce prefix to each pin 2017-04-10 17:44:39 +02:00
hda_auto_parser.h ALSA: hda - Sort input pins depending on amp caps 2014-09-23 15:57:32 +02:00
hda_beep.c ALSA: hda-beep: Update authors dead email address 2015-06-13 09:13:26 +02:00
hda_beep.h ALSA: hda-beep: Update authors dead email address 2015-06-20 09:24:40 +02:00
hda_bind.c ALSA: hda: Fix forget to free resource in error handling code path in hda_codec_driver_probe 2017-09-04 17:33:53 +02:00
hda_codec.c ALSA: hda - Fix yet remaining issue with vmaster 0dB initialization 2017-11-22 12:34:56 +01:00
hda_codec.h ALSA: hda: Fix regression of hdmi eld control created based on invalid pcm 2017-09-03 16:33:42 +02:00
hda_controller.c ALSA: hda - Skip card registration when no codec is found 2017-06-28 12:45:34 +02:00
hda_controller.h ALSA: hda - Fix doubly initialization of i915 component 2017-06-30 08:58:53 +02:00
hda_controller_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hda_eld.c ALSA: hda - Use snd_hdac namespace prefix for chmap exported APIs 2016-03-07 15:46:06 +01:00
hda_generic.c ALSA: hda - silence uninitialized variable warning in activate_amp_in() 2017-10-13 15:14:44 +02:00
hda_generic.h ALSA: hda - Allow to enable/disable vmaster build explicitly 2017-04-10 17:45:27 +02:00
hda_hwdep.c ALSA: hda - Add card field to hda_codec struct 2015-03-03 11:25:16 +01:00
hda_intel.c ALSA: hda - Force polling mode on CFL for fixing codec communication 2018-03-21 10:23:07 +01:00
hda_intel.h ALSA: hda - Spell vga_switcheroo consistently 2015-10-19 11:00:45 +02:00
hda_intel_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hda_jack.c ALSA: hda - Fix bad dereference of jack object 2016-02-09 12:16:31 +01:00
hda_jack.h ALSA: hda - Fix bad dereference of jack object 2016-02-09 12:16:31 +01:00
hda_local.h ALSA: hda - Remove the generic bind ctl helpers 2017-05-17 07:13:10 +02:00
hda_proc.c ALSA: hda/proc - Fix racy string access for power states 2015-08-17 15:12:04 +02:00
hda_sysfs.c ALSA: hda: constify attribute_group structures. 2017-06-29 18:20:21 +02:00
hda_tegra.c ALSA: hda/tegra: iomem fixups for sparse warnings 2016-06-22 15:19:10 +02:00
Kconfig ALSA: hda - Use IS_REACHABLE() for dependency on input 2018-01-15 20:16:54 +01:00
local.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
patch_analog.c ALSA: hda: make snd_kcontrol_new const 2017-08-16 14:29:08 +02:00
patch_ca0110.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_ca0132.c ALSA: hda/ca0132 - use ARRAY_SIZE 2017-10-13 15:14:08 +02:00
patch_cirrus.c ALSA: hda - Apply the existing quirk to iMac 14,1 2018-01-10 11:11:54 +01:00
patch_cmedia.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_conexant.c ALSA: hda: add dock and led support for HP ProBook 640 G2 2018-03-08 17:37:10 +01:00
patch_hdmi.c ALSA: hda - Add vendor id for Cannonlake HDMI codec 2017-12-07 13:42:28 +01:00
patch_realtek.c ALSA: hda/realtek - Always immediately update mute LED with pin VREF 2018-03-17 22:51:39 +01:00
patch_si3054.c ALSA: hda: Constify hw_constraints 2017-06-09 10:42:52 +02:00
patch_sigmatel.c ALSA: hda: make snd_kcontrol_new const 2017-08-16 14:29:08 +02:00
patch_via.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
thinkpad_helper.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00