From: David Henningsson <david.henningsson@canonical.com>
To: "Yang, Libin" <libin.yang@intel.com>, Takashi Iwai <tiwai@suse.de>
Cc: "Lin, Mengdong" <mengdong.lin@intel.com>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [PATCH] ALSA: hda - using POS_FIX_LPIB on Broadwell HDMI Audio
Date: Thu, 08 May 2014 18:06:08 +0200 [thread overview]
Message-ID: <536BAB70.3010905@canonical.com> (raw)
In-Reply-To: <96A12704CE18D347B625EE2D4A099D195233B1@SHSMSX103.ccr.corp.intel.com>
On 2014-05-08 09:58, Yang, Libin wrote:
> Hi Takashi,
>
> I tested the non-snoop mode. It's worse than snoop mode. Only noise can be heard if using non-snoop mode.
>
> I add the print in the function azx_position_ok(). The below is the dmesg:
> [ 119.509631] <0>posbuf: 26368, lpib: 16320, wallclk: 2330325
> [ 119.509674] snd_hda_intel 0000:00:03.0: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj.
> [ 119.509683] <0>posbuf: 26368, lpib: 16332, wallclk: 2331659
> [ 119.515467] <0>posbuf: 28224, lpib: 17444, wallclk: 2470504
> [ 119.523460] <0>posbuf: 30592, lpib: 18976, wallclk: 2662403
> [ 119.531431] <0>posbuf: 32128, lpib: 20508, wallclk: 2853751
> [ 119.594932] snd_hda_intel 0000:00:03.0: Unstable LPIB (20416 >= 16384); disabling LPIB delay counting
This looks quite bad - is it not a hardware bug if LPIB > CBL (CBL
should be 16384 in this case)?
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
next prev parent reply other threads:[~2014-05-08 16:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-07 18:03 [PATCH] ALSA: hda - using POS_FIX_LPIB on Broadwell HDMI Audio libin.yang
2014-05-08 5:09 ` Takashi Iwai
2014-05-08 5:48 ` Yang, Libin
2014-05-08 5:51 ` Takashi Iwai
2014-05-08 6:13 ` Yang, Libin
2014-05-08 6:19 ` Takashi Iwai
2014-05-08 6:28 ` Yang, Libin
2014-05-08 6:39 ` Takashi Iwai
2014-05-08 7:58 ` Yang, Libin
2014-05-08 16:06 ` David Henningsson [this message]
2014-05-09 10:08 ` Lin, Mengdong
2014-05-09 10:20 ` Takashi Iwai
2014-05-12 8:22 ` Lin, Mengdong
2014-05-12 8:31 ` Takashi Iwai
2014-05-12 9:46 ` Lin, Mengdong
2014-05-12 9:51 ` Takashi Iwai
2014-05-13 4:37 ` Lin, Mengdong
2014-05-13 7:19 ` Takashi Iwai
2014-05-13 9:00 ` Lin, Mengdong
2014-05-09 14:58 ` Pierre-Louis Bossart
2014-05-08 9:37 ` Lin, Mengdong
2014-05-08 9:42 ` Takashi Iwai
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