diff options
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 31 | ||||
| -rw-r--r-- | Documentation/sound/alsa/HD-Audio.txt | 20 |
2 files changed, 33 insertions, 18 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index bfcbbf8..2075bbb 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -227,6 +227,16 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. The power-management is supported. + Module snd-asihpi + ----------------- + + Module for AudioScience ASI soundcards + + enable_hpi_hwdep - enable HPI hwdep for AudioScience soundcard + + This module supports multiple cards. + The driver requires the firmware loader support on kernel. + Module snd-atiixp ----------------- @@ -622,28 +632,23 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. The power-management is supported. - Module snd-es968 - ---------------- - - Module for sound cards based on ESS ES968 chip (PnP only). - - This module supports multiple cards, PnP and autoprobe. - - The power-management is supported. - Module snd-es1688 ----------------- Module for ESS AudioDrive ES-1688 and ES-688 sound cards. - port - port # for ES-1688 chip (0x220,0x240,0x260) - fm_port - port # for OPL3 (option; share the same port as default) + isapnp - ISA PnP detection - 0 = disable, 1 = enable (default) mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default) - irq - IRQ # for ES-1688 chip (5,7,9,10) mpu_irq - IRQ # for MPU-401 port (5,7,9,10) + fm_port - port # for OPL3 (option; share the same port as default) + + with isapnp=0, the following additional options are available: + port - port # for ES-1688 chip (0x220,0x240,0x260) + irq - IRQ # for ES-1688 chip (5,7,9,10) dma8 - DMA # for ES-1688 chip (0,1,3) - This module supports multiple cards and autoprobe (without MPU-401 port). + This module supports multiple cards and autoprobe (without MPU-401 port) + and PnP with the ES968 chip. Module snd-es18xx ----------------- diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt index f4dd3bf..bdafdbd 100644 --- a/Documentation/sound/alsa/HD-Audio.txt +++ b/Documentation/sound/alsa/HD-Audio.txt @@ -119,10 +119,18 @@ the codec slots 0 and 1 no matter what the hardware reports. Interrupt Handling ~~~~~~~~~~~~~~~~~~ -In rare but some cases, the interrupt isn't properly handled as -default. You would notice this by the DMA transfer error reported by -ALSA PCM core, for example. Using MSI might help in such a case. -Pass `enable_msi=1` option for enabling MSI. +HD-audio driver uses MSI as default (if available) since 2.6.33 +kernel as MSI works better on some machines, and in general, it's +better for performance. However, Nvidia controllers showed bad +regressions with MSI (especially in a combination with AMD chipset), +thus we disabled MSI for them. + +There seem also still other devices that don't work with MSI. If you +see a regression wrt the sound quality (stuttering, etc) or a lock-up +in the recent kernel, try to pass `enable_msi=0` option to disable +MSI. If it works, you can add the known bad device to the blacklist +defined in hda_intel.c. In such a case, please report and give the +patch back to the upstream developer. HD-AUDIO CODEC @@ -196,7 +204,6 @@ generic parser regardless of the codec. Usually the codec-specific parser is much better than the generic parser (as now). Thus this option is more about the debugging purpose. - Speaker and Headphone Output ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ One of the most frequent (and obvious) bugs with HD-audio is the @@ -592,6 +599,9 @@ probing, the proc file is available, so you can get the raw codec information before modified by the driver. Of course, the driver isn't usable with `probe_only=1`. But you can continue the configuration via hwdep sysfs file if hda-reconfig option is enabled. +Using `probe_only` mask 2 skips the reset of HDA codecs (use +`probe_only=3` as module option). The hwdep interface can be used +to determine the BIOS codec initialization. hda-verb |