[alsa-devel] Problem with snd_hda_intel from 05-27-2010 snapshot
perex at perex.cz
Tue Jun 1 07:39:58 CEST 2010
On Mon, 31 May 2010, VDR User wrote:
> On Mon, May 31, 2010 at 1:43 PM, Jaroslav Kysela <perex at perex.cz> wrote:
>>> I've got a bit of a strange result. With the above patch (and the
>>> wallclk logging patch from your previous email), sound does not work.
>>> However, it _does_ start working only if I `echo 29 >
>>> /proc/asound/card1/pcm3p/xrun_debug`. I tested these results with a
>>> reboot in between each attempt just to make sure I'm working with a
>>> clean boot. I can't imagine what's causing this weird condition. Any
>> Try to disable jiffies check (value 25 for xrun_debug). Please, post your
>> log for value 29 for inspection. Thanks.
> With xrun_debug 25 I get sound for about 1 second and then it
> disappears. 29 of course works fine as mentioned previously.
Thanks. Here is next correction:
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 170610e..b6ba210 100644
@@ -1910,11 +1910,11 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev)
"hda-intel: zero azx_dev->period_bytes"))
return -1; /* this shouldn't happen! */
- if (wallclk <= azx_dev->period_wallclk &&
+ if (wallclk < (azx_dev->period_wallclk * 3) / 2 &&
pos % azx_dev->period_bytes > azx_dev->period_bytes / 2)
/* NG - it's below the first next period boundary */
return bdl_pos_adj[chip->dev_index] ? 0 : -1;
- azx_dev->start_wallclk = wallclk;
+ azx_dev->start_wallclk += wallclk;
return 1; /* OK, it's fine */
Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.
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