On Tue, Feb 23, 2016 at 12:32:23PM +0900, Toyo Abe wrote: > > Hi, > > I'd struggled a similar underrun problem on my baytrail device. The dmesg showed > the following warnings. > > [15356.757938] had: Driver detected 2 missed buffer done interrupt(s)!!!! > [15356.761594] had: Driver detected 1 missed buffer done interrupt(s)!!!! > [15356.774775] had: Unable to clear UNDERRUN bits > [15356.791312] had: Driver detected 1 missed buffer done interrupt(s)!!!! > [15356.808148] had: Unable to clear UNDERRUN bits > [15356.824692] had: Driver detected 2 missed buffer done interrupt(s)!!!! > > After some investigation, I found some problems on the driver and fixed a few of > them. I pushed the fix to my github. I hope it might help you. > https://raw.githubusercontent.com/toyoabe/baytrailaudio/fix-underrun/hdmi_audio_20150319.patch > > Best Regards, > -toyo Hi, that was it!. I added your changes and now the audio works. I'm happy. I got finally every subsystem of the Compute Stick working. I have a minor question tought. Alsamixer says: This sound device does not have any controls. Is there a way to change the volume without enabling pulseaudio? Just for documentation, here is the small change that Toyo did to make the underrun disappear: diff -Nraub a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c --- a/drivers/gpu/drm/i915/i915_irq.c 2016-02-23 08:03:42.406016576 -0400 +++ b/drivers/gpu/drm/i915/i915_irq.c 2016-02-23 08:03:58.714016576 -0400 @@ -2717,11 +2717,14 @@ int pipe = 1; spin_lock_irqsave(&dev_priv->irq_lock, irqflags); + i915_enable_lpe_pipestat(dev_priv, pipe); + imr = I915_READ(VLV_IMR); /* Audio is on Stream A */ imr &= ~I915_LPE_PIPE_A_INTERRUPT; I915_WRITE(VLV_IMR, imr); - i915_enable_lpe_pipestat(dev_priv, pipe); + I915_WRITE(VLV_IER, ~imr); + POSTING_READ(VLV_IER); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); return 0; @@ -2769,7 +2772,10 @@ spin_lock_irqsave(&dev_priv->irq_lock, irqflags); imr = I915_READ(VLV_IMR); imr |= I915_LPE_PIPE_A_INTERRUPT; + I915_WRITE(VLV_IER, ~imr); I915_WRITE(VLV_IMR, imr); + POSTING_READ(VLV_IMR); + i915_disable_lpe_pipestat(dev_priv, pipe); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); diff -Nraub a/sound/hdmi_audio/intel_mid_hdmi_audio.c b/sound/hdmi_audio/intel_mid_hdmi_audio.c --- a/sound/hdmi_audio/intel_mid_hdmi_audio.c 2016-02-23 08:03:42.414016576 -0400 +++ b/sound/hdmi_audio/intel_mid_hdmi_audio.c 2016-02-23 08:03:58.722016576 -0400 @@ -1128,7 +1128,6 @@ pr_debug("HDMI status =0x%x\n", hdmi_status); if (hdmi_status & AUD_CONFIG_MASK_UNDERRUN) { i++; - hdmi_status &= ~AUD_CONFIG_MASK_UNDERRUN; had_write_register(AUD_HDMI_STATUS_v2, hdmi_status); } else break; Thanks again. Giacomo > > Pierre-Louis Bossart wrote: > > On 02/19/2016 02:39 PM, Giacomo Comes wrote: > >> Hi, > >> I have recently bought a Intel Compute Stick and I am having trouble with= > > the audio. > >> Intel provides a custom Ubuntu release that support audio, but I want to = > > run the > >> linux distribution of my choice on it (openSUSE 13.2 for the moment). > >> > >> In order to have HDMI audio support it is necessary to compile a kernel w= > > ith this patch > >> (https://raw.githubusercontent.com/01org/baytrailaudio/master/hdmi_audio_= > > 20150319.patch) > >> provided by Intel for kernel 3.16.7 (https://01.org/ubuntu-hdmi) > >> > >> I compiled the openSUSE kernel using the default openSUSE .config plus th= > > e following: > >> CONFIG_SUPPORT_HDMI=3Dy > >> CONFIG_SND_SOC=3Dm > >> CONFIG_SND_SOC_INTEL_SST=3Dm > >> CONFIG_SND_SOC_INTEL_BYT_RT5640_MACH=3Dm > >> > >> I booted the new kernel and aplay -l gives this output: > >> **** List of PLAYBACK Hardware Devices **** > >> card 0: IntelHDMI [IntelHDMI], device 0: IntelHDMI [IntelHDMI] > >> Subdevices: 0/1 > >> Subdevice #0: subdevice #0 > >> > >> but when I run: > >> aplay /usr/share/sounds/alsa/test.wav > >> the audio plays for .2 seconds and then nothing more. > >> Sometime it will play later a little bit more and stop again. > >> At some point these messages appears: > >> underrun!!! (at least 29325.946 ms long) > >> underrun!!! (at least 1535.889 ms long) > >> underrun!!! (at least 3196.213 ms long) > >> > >> > >> I have looked around on google for a hint on how to fix this issue but I = > > found nothing. > >> Any idea where to look for a solution? > >> > >> Attached there are the dmesg and lsmod output for ubuntu > >> with the working audio and openSUSE 13.2 plus patch > >> without the working audio. > >> I can provide any other information you need. > > > > There are enough messages that make me believe something is very wrong > > from the start > > > > 19.664486] had: ******** HAD DRIVER loading.. Ver: 0.01.003 > > [ 19.664549] hdmi_audio_probe dma_mask: 0 > > [ 19.664937] card->dev is NULL!!!!! Should not be this case > > [ 19.668176] [drm] mid_hdmi_audio_register: Scheduling HDMI audio work qu= > > eue > > [ 19.670745] [drm:i915_had_wq] *ERROR* Checking for HDMI connection at bo= > > ot > > > > Some of us at Intel are trying to clean this up but it'll take time. > > > > > > _______________________________________________ > > Alsa-devel mailing list > > Alsa-devel@xxxxxxxxxxxxxxxx > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
