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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=536BAB70.3010905@canonical.com \
--to=david.henningsson@canonical.com \
--cc=alsa-devel@alsa-project.org \
--cc=libin.yang@intel.com \
--cc=mengdong.lin@intel.com \
--cc=pierre-louis.bossart@linux.intel.com \
--cc=tiwai@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.