linux_dsm_epyc7002/sound/pci/hda
Takashi Iwai 8ae743e82f ALSA: hda - Skip ELD notification during system suspend
The recent addition of ELD notifier for Intel HDMI/DP codec may lead
the bad codec connection found as kernel messages like below:
 Suspending console(s) (use no_console_suspend to debug)
 hdmi_present_sense: snd_hda_codec_hdmi hdaudioC0D2: HDMI status: Codec=2 Pin=6 Presence_Detect=1 ELD_Valid=1
 snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, last cmd=0x206f2e08
 snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, last cmd=0x206f2e08
 ....
  snd_hda_codec_hdmi hdaudioC0D2: HDMI: ELD buf size is 0, force 128
  snd_hda_intel 0000:00:1f.3: azx_get_response timeout, switching to polling mode: last cmd=0x206f2f00
 snd_hda_intel 0000:00:1f.3: No response from codec, disabling MSI: last cmd=0x206f2f00
 snd_hda_intel 0000:00:1f.3: azx_get_response timeout, switching to single_cmd mode: last cmd=0x206f2f00
 azx_single_wait_for_response: 42 callbacks suppressed

This seems appearing when the sound driver went to suspend before i915
driver.  Then i915 driver disables HDMI/DP audio bit and calls the
registered notifier, and the HDA codec tries to handle it as a
hot(un)plug.  But since the driver is already in the suspended state,
it fails miserably.

As this is a sort of spurious wakeup, it can be ignored safely, as
long as it's delivered during the system suspend.  OTOH, if a
notification comes during the runtime suspend, the situation is
different: we need to wake up.  But during the system suspend, such a
notification can't be the reason for a wakeup.

This patch addresses it by a simple check of the current sound card
status.  The skipped notification doesn't matter because the HDA
driver will check the plugged status forcibly at the resume in
return.

Then, why the card status, not a runtime PM status or else?  The HDA
controller driver is supposed to set the card status to D3 at the
system suspend but not at the runtime suspend.  So we can see it as a
flag that is set only for the system suspend.  Admittedly, it's a bit
ugly, but it should work well for now.

Reported-and-tested-by: "Zhang, Xiong Y" <xiong.y.zhang@intel.com>
Fixes: 25adc137c5 ('ALSA: hda - Wake the codec up on pin/ELD notify events')
Cc: <stable@vger.kernel.org> # v4.3+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-11-27 14:23:00 +01:00
..
ca0132_regs.h
dell_wmi_helper.c
hda_auto_parser.c ALSA: hda - remove no physical connection pins from pin_quirk table 2015-08-03 10:16:20 +02:00
hda_auto_parser.h
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 Merge branch 'topic/hda-modalias' into for-next 2015-10-20 10:19:40 +02:00
hda_codec.c ASoC: Updates for v4.4 2015-10-26 12:14:49 +01:00
hda_codec.h Merge branch 'topic/hda-modalias' into for-next 2015-10-20 10:19:40 +02:00
hda_controller_trace.h ALSA: hda - rename hda_intel_trace.h to hda_controller_trace.h 2015-05-18 10:06:32 +02:00
hda_controller.c ALSA: hda - Fix lost 4k BDL boundary workaround 2015-11-02 17:39:06 +01:00
hda_controller.h ALSA: hda - Spell vga_switcheroo consistently 2015-10-19 11:00:45 +02:00
hda_eld.c ALSA: hda/eld - Add const to possible places 2015-08-17 15:12:14 +02:00
hda_generic.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
hda_generic.h ALSA: hda - Fix power of pins used for mute LED with vrefs 2015-03-20 18:30:48 +01:00
hda_hwdep.c ALSA: hda - Add card field to hda_codec struct 2015-03-03 11:25:16 +01:00
hda_intel_trace.h ALSA: hda - add hda_intel_trace.h 2015-05-18 10:06:44 +02:00
hda_intel.c ASoC: Fixes for v4.4 2015-11-27 13:40:20 +01:00
hda_intel.h ALSA: hda - Spell vga_switcheroo consistently 2015-10-19 11:00:45 +02:00
hda_jack.c ALSA: hda - Simplify phantom jack handling for HDMI/DP 2015-11-12 11:52:13 +01:00
hda_jack.h ALSA: hda - Simplify phantom jack handling for HDMI/DP 2015-11-12 11:52:13 +01:00
hda_local.h ALSA: hda: make use of core codec fns 2015-10-08 19:09:36 +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 - consolidate chip rename functions 2015-10-15 14:05:28 +02:00
hda_tegra.c ALSA: hda/tegra - async probe for avoiding module loading deadlock 2015-09-24 14:01:46 +02:00
Kconfig ALSA: HDAC: move SND_HDA_PREALLOC_SIZE to core 2015-06-16 17:40:38 +02:00
local.h ALSA: hda - Move a part of hda_codec stuff into hdac_device 2015-03-23 13:17:17 +01:00
Makefile ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS 2015-05-27 21:25:19 +02:00
patch_analog.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +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 - Convert leftover pr_info() and pr_err() 2015-10-26 16:54:16 +01:00
patch_cirrus.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_cmedia.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_conexant.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_hdmi.c ALSA: hda - Skip ELD notification during system suspend 2015-11-27 14:23:00 +01:00
patch_realtek.c ALSA: hda - Fix noise on Gigabyte Z170X mobo 2015-11-24 20:02:12 +01:00
patch_si3054.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
patch_sigmatel.c ALSA: hda - Apply HP headphone fixups more generically 2015-11-20 17:03:33 +01:00
patch_via.c ALSA: hda - convert to hda_device_id 2015-10-20 10:15:20 +02:00
thinkpad_helper.c Revert "ALSA: hda - Add mute-LED mode control to Thinkpad" 2015-05-24 08:32:37 +02:00