[alsa-devel] [PATCH]Change the AZX_MAX_PCMS to 10

Jaroslav Kysela perex at perex.cz
Thu Jan 28 09:48:44 CET 2010

On Thu, 28 Jan 2010, Wei Ni wrote:

> Hi, Takashi When I develop hdmi audio driver on the GT21x, I found a bug 
> in the had_intel.c In hda_codec.c, it has define "[HDA_PCM_TYPE_HDMI] = 
> { 3, 7, 8, 9, -1 },", it support up to device 9 for HDMI. But in 
> hda_intel.c, it only define AZX_MAX_PCMS as 8. So the GT21x have 4 hdmi 
> codecs, when run azx_attach_pcm_stream(), it will show error "Invalid 
> PCM device number 8", and "... number 9", and return "-EINVAL". We 
> should change the AZX_MAX_PCMS to 10.

I'm afraid, but having more than 8 PCM devices might cause problems when 
CONFIG_SND_DYNAMIC_MINORS is not set. At least, this condition 
(#if SNDRV_PCM_DEVICES < 10) should be handled in the HDA driver.


Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.

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