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authorTakashi Iwai <tiwai@suse.de>2008-12-11 01:44:18 -0500
committerTakashi Iwai <tiwai@suse.de>2008-12-11 01:44:18 -0500
commit623b9f6738dee0394398564a74fdabbff00f506f (patch)
treeb6b039e8bbfb787afc7d4a6dc5142ab65a136469 /Documentation/sound/alsa/HD-Audio.txt
parentd2afbe78a2922929ad44882d3583d938b9949a30 (diff)
ALSA: hda - Update HD-Audio.txt
Fixed typos and added a section about codecgraph. Thanks to Vedran Miletić and Daniel T Chen for suggestions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound/alsa/HD-Audio.txt')
-rw-r--r--Documentation/sound/alsa/HD-Audio.txt17
1 files changed, 15 insertions, 2 deletions
diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt
index ca8187de52d8..ee9117eee1aa 100644
--- a/Documentation/sound/alsa/HD-Audio.txt
+++ b/Documentation/sound/alsa/HD-Audio.txt
@@ -266,7 +266,7 @@ submit the improvement patch to the author.
266Direct Debugging 266Direct Debugging
267~~~~~~~~~~~~~~~~ 267~~~~~~~~~~~~~~~~
268If no model option gives you a better result, and you are a touch guy 268If no model option gives you a better result, and you are a touch guy
269to fight again the evil, try debugging via hitting the raw HD-audio 269to fight against evil, try debugging via hitting the raw HD-audio
270codec verbs to the device. Some tools are available: hda-emu and 270codec verbs to the device. Some tools are available: hda-emu and
271hda-analyzer. The detailed description is found in the sections 271hda-analyzer. The detailed description is found in the sections
272below. You'd need to enable hwdep for using these tools. See "Kernel 272below. You'd need to enable hwdep for using these tools. See "Kernel
@@ -389,7 +389,7 @@ power-down/up depending on the device. Some of them might be
389solvable, but some are hard, I'm afraid. Some distros such as 389solvable, but some are hard, I'm afraid. Some distros such as
390openSUSE enables the power-saving feature automatically when the power 390openSUSE enables the power-saving feature automatically when the power
391cable is unplugged. Thus, if you hear noises, suspect first the 391cable is unplugged. Thus, if you hear noises, suspect first the
392power-saving. See /sys/modules/snd_hda_intel/parameters/power_save to 392power-saving. See /sys/module/snd_hda_intel/parameters/power_save to
393check the current value. If it's non-zero, the feature is turned on. 393check the current value. If it's non-zero, the feature is turned on.
394 394
395 395
@@ -503,6 +503,19 @@ alsa-project.org:
503- http://git.alsa-project.org/?p=alsa.git;a=tree;f=hda-analyzer 503- http://git.alsa-project.org/?p=alsa.git;a=tree;f=hda-analyzer
504 504
505 505
506Codecgraph
507~~~~~~~~~~
508Codecgraph is a utility program to generate a graph and visualizes the
509codec-node connection of a codec chip. It's especially useful when
510you analyze or debug a codec without a proper datasheet. The program
511parses the given codec proc file and converts to SVG via graphiz
512program.
513
514The tarball and GIT trees are found in the web page at:
515
516- http://helllabs.org/codecgraph/
517
518
506hda-emu 519hda-emu
507~~~~~~~ 520~~~~~~~
508hda-emu is an HD-audio emulator. The main purpose of this program is 521hda-emu is an HD-audio emulator. The main purpose of this program is