On Thu, 26 Nov 2015 07:06:56 +0100, Zhang, Xiong Y wrote: > > > On Wed, 25 Nov 2015 11:57:13 +0100, > > Zhang, Xiong Y wrote: > > > > > > > On Wed, 25 Nov 2015 10:56:51 +0100, > > > > Zhang, Xiong Y wrote: > > > > > > > > > > Recently I always see the following error message during S4 or S3 resume > > > > with drm-intel-nightly. > > > > > [ 97.778063] PM: Syncing filesystems ... done. > > > > > [ 97.801550] Freezing user space processes ... (elapsed 0.002 seconds) > > > > done. > > > > > [ 97.804297] PM: Marking nosave pages: [mem > > 0x00000000-0x00000fff] > > > > > [ 97.804302] PM: Marking nosave pages: [mem > > 0x00058000-0x00058fff] > > > > > [ 97.804305] PM: Marking nosave pages: [mem 0x0009e000-0x000fffff] > > > > > [ 97.804310] PM: Marking nosave pages: [mem > > 0x84c11000-0x84c12fff] > > > > > [ 97.804312] PM: Marking nosave pages: [mem > > 0x876fc000-0x87746fff] > > > > > [ 97.804317] PM: Marking nosave pages: [mem > > 0x8785e000-0x87fe9fff] > > > > > [ 97.804387] PM: Marking nosave pages: [mem 0x88000000-0xffffffff] > > > > > [ 97.806363] PM: Basic memory bitmaps created > > > > > [ 97.806409] PM: Preallocating image memory... done (allocated > > 321557 > > > > pages) > > > > > [ 98.150475] PM: Allocated 1286228 kbytes in 0.34 seconds (3783.02 > > > > MB/s) > > > > > [ 98.150476] Freezing remaining freezable tasks ... (elapsed 0.001 > > seconds) > > > > done. > > > > > [ 98.151998] Suspending console(s) (use no_console_suspend to > > debug) > > > > > [ 98.173485] hdmi_present_sense: snd_hda_codec_hdmi > > hdaudioC0D2: > > > > HDMI status: Codec=2 Pin=6 Presence_Detect=1 ELD_Valid=1 > > > > > [ 99.178150] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178151] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178151] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178152] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178152] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178153] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178153] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178154] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178154] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178155] snd_hda_intel 0000:00:1f.3: spurious response 0x0:0x2, > > last > > > > cmd=0x206f2e08 > > > > > [ 99.178162] snd_hda_codec_hdmi hdaudioC0D2: HDMI: ELD buf size > > is 0, > > > > force 128 > > > > > [ 101.189709] snd_hda_intel 0000:00:1f.3: azx_get_response timeout, > > > > switching to polling mode: last cmd=0x206f2f00 > > > > > [ 102.195492] snd_hda_intel 0000:00:1f.3: No response from codec, > > > > disabling MSI: last cmd=0x206f2f00 > > > > > [ 103.201275] snd_hda_intel 0000:00:1f.3: azx_get_response timeout, > > > > switching to single_cmd mode: last cmd=0x206f2f00 > > > > > [ 103.201396] azx_single_wait_for_response: 42 callbacks suppressed > > > > > > > > > > The bisect result points to this commit. > > > > > I checked this patch and had one question: if i915 driver wake up ahead of > > > > snd_hda_intel driver during resume, i915 driver will call audio driver's > > > > hdmi_present_sense() function through this patch, but the audio interrupt > > is > > > > disabled at this moment, how could hdmi_present_sense() get the > > response > > > > from codec ? > > > > > > > > Yeah, a bad thing happens there. The fix should be simple like below, > > > > though. Basically the pins are checked in the resume callback in > > > > anyway, so there is no need to handle the notification during PM. > > > > > > > > Could you check whether it works? > > > > > > > > > > > > thanks, > > > > > > > > Takashi > > > > > > Strange, your patch couldn't get away the error message. > > > > OK, then it's not about the race *during* the hd-audio driver > > resuming or such. I guess it's the other way round: the i915 driver > > notifies it unnecessarily while it's getting off. The audio part of > > HDMI controller relies on the i915 power state, so it's screwed up. > > > > Check with drm.debug option to see in which code path it's triggered. > > If it's a call in i915 suspend, the call should be removed not to wake > > up the audio part unnecessarily. > > [Zhang, Xiong Y] it is called in intel_audio_codec_disable() from i915 suspend. So the call of eld_notifier should be suppressed at suspend. > --- > diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c > index bdb6f226d006..b468fe0e6195 100644 > --- a/sound/pci/hda/patch_hdmi.c > +++ b/sound/pci/hda/patch_hdmi.c > @@ -2352,7 +2352,9 @@ static void intel_pin_eld_notify(void *audio_ptr, int port) > struct hda_codec *codec = audio_ptr; > int pin_nid = port + 0x04; > > - check_presence_and_report(codec, pin_nid); > + /* don't call notifier during PM; will be checked in resume callback */ > + if (atomic_read(&codec->core.in_pm)) > + check_presence_and_report(codec, pin_nid); > } > > static int patch_generic_hdmi(struct hda_codec *codec) > > > This could remove the error message. Go through the audio driver, I found in_pm isn't zero only during call codec_suspend() and codec_resume(). atomic_inc_not_zero(&codec->in_pm) in snd_hdac_power_up_pm() isn't inc in_pm since in_pm is zero. > Is this right ? It's the flag that is set only during the sound driver's PM, not i915 driver's PM. I gave the patch from the wrong assumption. It's not the race between i915 and audio PM, thus the patch doesn't help. > > BTW, I have a patchset to avoid the audio h/w wakeup by a new > > component ops to get ELD and connection states. It was posted to > > alsa-devel shortly ago just as a reference, but this should work well > > in such a case, too. The test patches are found in test/hdmi-jack > > branch of my sound git tree. Did you try this branch (merge onto intel-test-nightly)? Takashi _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
