diff options
Diffstat (limited to 'Documentation/sound/alsa')
| -rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 29 | ||||
| -rw-r--r-- | Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl | 56 |
2 files changed, 35 insertions, 50 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 13cba955cb5..2f27f391c7c 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -167,7 +167,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. spdif - Support SPDIF I/O - Default: disabled - Module supports autoprobe and multiple chips (max 8). + This module supports one chip and autoprobe. The power-management is supported. @@ -206,7 +206,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. See "AC97 Quirk Option" section below. spdif_aclink - S/PDIF transfer over AC-link (default = 1) - This module supports up to 8 cards and autoprobe. + This module supports one card and autoprobe. ATI IXP has two different methods to control SPDIF output. One is over AC-link and another is over the "direct" SPDIF output. The @@ -218,7 +218,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. Module for ATI IXP 150/200/250 AC97 modem controllers. - Module supports up to 8 cards. + This module supports one card and autoprobe. Note: The default index value of this module is -2, i.e. the first slot is excluded. @@ -637,7 +637,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. model - force the model name position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size) - Module supports up to 8 cards. + This module supports one card and autoprobe. Each codec may have a model table for different configurations. If your machine isn't listed there, the default (usually minimal) @@ -663,6 +663,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. adjusted. Appearing only when compiled with $CONFIG_SND_DEBUG=y + ALC260 + hp HP machines + fujitsu Fujitsu S7020 + CMI9880 minimal 3-jack in back min_fp 3-jack in back, 2-jack in front @@ -811,7 +815,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. semaphores (e.g. on some ASUS laptops) (default off) - Module supports autoprobe and multiple bus-master chips (max 8). + This module supports one chip and autoprobe. Note: the latest driver supports auto-detection of chip clock. if you still encounter too fast playback, specify the clock @@ -830,7 +834,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. ac97_clock - AC'97 codec clock base (0 = auto-detect) - This module supports up to 8 cards and autoprobe. + This module supports one card and autoprobe. Note: The default index value of this module is -2, i.e. the first slot is excluded. @@ -950,8 +954,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. use_cache - 0 or 1 (disabled by default) vaio_hack - alias buffer_top=0x25a800 reset_workaround - enable AC97 RESET workaround for some laptops + reset_workaround2 - enable extended AC97 RESET workaround for some + other laptops - Module supports autoprobe and multiple chips (max 8). + This module supports one chip and autoprobe. The power-management is supported. @@ -980,6 +986,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. workaround is enabled automatically. For other laptops with a hard freeze, you can try reset_workaround=1 option. + Note: Dell Latitude CSx laptops have another problem regarding + AC97 RESET. On these laptops, reset_workaround2 option is + turned on as default. This option is worth to try if the + previous reset_workaround option doesn't help. + Note: This driver is really crappy. It's a porting from the OSS driver, which is a result of black-magic reverse engineering. The detection of codec will fail if the driver is loaded *after* @@ -1310,7 +1321,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. ac97_quirk - AC'97 workaround for strange hardware See "AC97 Quirk Option" section below. - Module supports autoprobe and multiple bus-master chips (max 8). + This module supports one chip and autoprobe. Note: on some SMP motherboards like MSI 694D the interrupts might not be generated properly. In such a case, please try to @@ -1352,7 +1363,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. ac97_clock - AC'97 codec clock base (default 48000Hz) - Module supports up to 8 cards. + This module supports one card and autoprobe. Note: The default index value of this module is -2, i.e. the first slot is excluded. diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl index 24e85520890..260334c98d9 100644 --- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl @@ -18,8 +18,8 @@ </affiliation> </author> - <date>March 6, 2005</date> - <edition>0.3.4</edition> + <date>October 6, 2005</date> + <edition>0.3.5</edition> <abstract> <para> @@ -30,7 +30,7 @@ <legalnotice> <para> - Copyright (c) 2002-2004 Takashi Iwai <email>tiwai@suse.de</email> + Copyright (c) 2002-2005 Takashi Iwai <email>tiwai@suse.de</email> </para> <para> @@ -1433,25 +1433,10 @@ <informalexample> <programlisting> <![CDATA[ - if (chip->res_port) { - release_resource(chip->res_port); - kfree_nocheck(chip->res_port); - } + release_and_free_resource(chip->res_port); ]]> </programlisting> </informalexample> - - As you can see, the resource pointer is also to be freed - via <function>kfree_nocheck()</function> after - <function>release_resource()</function> is called. You - cannot use <function>kfree()</function> here, because on ALSA, - <function>kfree()</function> may be a wrapper to its own - allocator with the memory debugging. Since the resource pointer - is allocated externally outside the ALSA, it must be released - via the native - <function>kfree()</function>. - <function>kfree_nocheck()</function> is used for that; it calls - the native <function>kfree()</function> without wrapper. </para> <para> @@ -2190,8 +2175,7 @@ struct _snd_pcm_runtime { unsigned int rate_den; /* -- SW params -- */ - int tstamp_timespec; /* use timeval (0) or timespec (1) */ - snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */ + struct timespec tstamp_mode; /* mmap timestamp is updated */ unsigned int period_step; unsigned int sleep_min; /* min ticks to sleep */ snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ @@ -3709,8 +3693,7 @@ struct _snd_pcm_runtime { <para> Here, the chip instance is retrieved via <function>snd_kcontrol_chip()</function> macro. This macro - converts from kcontrol->private_data to the type defined by - <type>chip_t</type>. The + just accesses to kcontrol->private_data. The kcontrol->private_data field is given as the argument of <function>snd_ctl_new()</function> (see the later subsection @@ -5998,32 +5981,23 @@ struct _snd_pcm_runtime { The first argument is the expression to evaluate, and the second argument is the action if it fails. When <constant>CONFIG_SND_DEBUG</constant>, is set, it will show an - error message such as <computeroutput>BUG? (xxx) (called from - yyy)</computeroutput>. When no debug flag is set, this is - ignored. + error message such as <computeroutput>BUG? (xxx)</computeroutput> + together with stack trace. </para> - </section> - - <section id="useful-functions-snd-runtime-check"> - <title><function>snd_runtime_check()</function></title> <para> - This macro is quite similar with - <function>snd_assert()</function>. Unlike - <function>snd_assert()</function>, the expression is always - evaluated regardless of - <constant>CONFIG_SND_DEBUG</constant>. When - <constant>CONFIG_SND_DEBUG</constant> is set, the macro will - show a message like <computeroutput>ERROR (xx) (called from - yyy)</computeroutput>. + When no debug flag is set, this macro is ignored. </para> </section> <section id="useful-functions-snd-bug"> <title><function>snd_BUG()</function></title> <para> - It calls <function>snd_assert(0,)</function> -- that is, just - prints the error message at the point. It's useful to show that - a fatal error happens there. + It shows <computeroutput>BUG?</computeroutput> message and + stack trace as well as <function>snd_assert</function> at the point. + It's useful to show that a fatal error happens there. + </para> + <para> + When no debug flag is set, this macro is ignored. </para> </section> </chapter> |