[PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[Brent Lu]

Port commit 6d011d5057ff ("ALSA: hda: Clear RIRB status before reading
WP") from legacy HDA driver to fix the get response timeout issue.
Current SOF driver does not suffer from this issue because sync write
is enabled in hda_init. The issue will come back if the sync write is
disabled for some reason.

Signed-off-by: Brent Lu <brent.lu@intel.com>
---
 sound/soc/sof/intel/hda-stream.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 7f65dcc..1bda14c 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -653,11 +653,16 @@ irqreturn_t hda_dsp_stream_threaded_handler(int irq, void *context)
 		if (status & AZX_INT_CTRL_EN) {
 			rirb_status = snd_hdac_chip_readb(bus, RIRBSTS);
 			if (rirb_status & RIRB_INT_MASK) {
+				/*
+				 * Clearing the interrupt status here ensures
+				 * that no interrupt gets masked after the RIRB
+				 * wp is read in snd_hdac_bus_update_rirb.
+				 */
+				snd_hdac_chip_writeb(bus, RIRBSTS,
+						     RIRB_INT_MASK);
 				active = true;
 				if (rirb_status & RIRB_INT_RESPONSE)
 					snd_hdac_bus_update_rirb(bus);
-				snd_hdac_chip_writeb(bus, RIRBSTS,
-						     RIRB_INT_MASK);
 			}
 		}
 #endif
-- 
2.7.4

Re: [PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[Takashi Iwai]

On Fri, 12 Jun 2020 12:50:48 +0200,
Brent Lu wrote:
> 
> Port commit 6d011d5057ff ("ALSA: hda: Clear RIRB status before reading
> WP") from legacy HDA driver to fix the get response timeout issue.
> Current SOF driver does not suffer from this issue because sync write
> is enabled in hda_init. The issue will come back if the sync write is
> disabled for some reason.
> 
> Signed-off-by: Brent Lu <brent.lu@intel.com>

Reviewed-by: Takashi Iwai <tiwai@suse.de>


Thanks!

Takashi

Re: [PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[Kai Vehmanen]

Hey Brent,

On Fri, 12 Jun 2020, Takashi Iwai wrote:

> On Fri, 12 Jun 2020 12:50:48 +0200, Brent Lu wrote:
> > 
> > Port commit 6d011d5057ff ("ALSA: hda: Clear RIRB status before reading
> > WP") from legacy HDA driver to fix the get response timeout issue.
> > Current SOF driver does not suffer from this issue because sync write
> > is enabled in hda_init. The issue will come back if the sync write is
> > disabled for some reason.
> > 
> > Signed-off-by: Brent Lu <brent.lu@intel.com>
> 
> Reviewed-by: Takashi Iwai <tiwai@suse.de>

thanks, looks good now:

Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Re: [Sound-open-firmware] [PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[Pierre-Louis Bossart]

On 6/12/20 7:24 AM, Kai Vehmanen wrote:
> Hey Brent,
> 
> On Fri, 12 Jun 2020, Takashi Iwai wrote:
> 
>> On Fri, 12 Jun 2020 12:50:48 +0200, Brent Lu wrote:
>>>
>>> Port commit 6d011d5057ff ("ALSA: hda: Clear RIRB status before reading
>>> WP") from legacy HDA driver to fix the get response timeout issue.
>>> Current SOF driver does not suffer from this issue because sync write
>>> is enabled in hda_init. The issue will come back if the sync write is
>>> disabled for some reason.
>>>
>>> Signed-off-by: Brent Lu <brent.lu@intel.com>
>>
>> Reviewed-by: Takashi Iwai <tiwai@suse.de>
> 
> thanks, looks good now:
> 
> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

CI results initiated by Kai don't show any regression and change looks 
good so:

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Thanks Brent!

Re: [PATCH v3] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP

[Mark Brown]

On Fri, 12 Jun 2020 18:50:48 +0800, Brent Lu wrote:
> Port commit 6d011d5057ff ("ALSA: hda: Clear RIRB status before reading
> WP") from legacy HDA driver to fix the get response timeout issue.
> Current SOF driver does not suffer from this issue because sync write
> is enabled in hda_init. The issue will come back if the sync write is
> disabled for some reason.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: SOF: Intel: hda: Clear RIRB status before reading WP
      commit: 40e2c465894e5b79b49f55d9574dbcda4ac0f08f

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark