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ASoC: doc: dapm: improve section "Codec/DSP Widget Interconnections"

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Improve wording in a few places, cleanup ReST colon syntax, remove space
before colon, and remove the "codec" parameter in the parentheses of
snd_soc_dapm_new_widgets() (there should be no parameters in the docs, and
that function takes a card, not a codec).

Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20240426-dapm-docs-v2-10-87b07547eb5b@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Luca Ceresoli 2024-04-26 18:56:43 +02:00 committed by Mark Brown
parent d40e821944
commit 057acfb460
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1 changed files with 8 additions and 11 deletions
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19
Documentation/sound/soc/dapm.rst
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@ -306,25 +306,23 @@ This is easiest with a diagram of the codec or DSP (and schematic of the machine
audio system), as it requires joining widgets together via their audio signal
paths.
e.g., from the WM8731 output mixer (wm8731.c)
The WM8731 output mixer has 3 inputs (sources)
For example the WM8731 output mixer (wm8731.c) has 3 inputs (sources):
1. Line Bypass Input
2. DAC (HiFi playback)
3. Mic Sidetone Input
Each input in this example has a kcontrol associated with it (defined in example
above) and is connected to the output mixer via its kcontrol name. We can now
connect the destination widget (wrt audio signal) with its source widgets.
::
Each input in this example has a kcontrol associated with it (defined in
the example above) and is connected to the output mixer via its kcontrol
name. We can now connect the destination widget (wrt audio signal) with its
source widgets. ::
/* output mixer */
{"Output Mixer", "Line Bypass Switch", "Line Input"},
{"Output Mixer", "HiFi Playback Switch", "DAC"},
{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
So we have :
So we have:
* Destination Widget <=== Path Name <=== Source Widget, or
* Sink, Path, Source, or
@ -333,12 +331,11 @@ So we have :
When there is no path name connecting widgets (e.g. a direct connection) we
pass NULL for the path name.
Interconnections are created with a call to:
::
Interconnections are created with a call to::
snd_soc_dapm_connect_input(codec, sink, path, source);
Finally, snd_soc_dapm_new_widgets(codec) must be called after all widgets and
Finally, snd_soc_dapm_new_widgets() must be called after all widgets and
interconnections have been registered with the core. This causes the core to
scan the codec and machine so that the internal DAPM state matches the
physical state of the machine.