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-rw-r--r--Documentation/DocBook/writing-an-alsa-driver.tmpl19
1 files changed, 2 insertions, 17 deletions
diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl
index 84ef6a9..a27ab9f5 100644
--- a/Documentation/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl
@@ -2181,10 +2181,6 @@ struct _snd_pcm_runtime {
struct snd_pcm_hardware hw;
struct snd_pcm_hw_constraints hw_constraints;
- /* -- interrupt callbacks -- */
- void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
- void (*transfer_ack_end)(struct snd_pcm_substream *substream);
-
/* -- timer -- */
unsigned int timer_resolution; /* timer resolution */
@@ -2209,9 +2205,8 @@ struct _snd_pcm_runtime {
For the operators (callbacks) of each sound driver, most of
these records are supposed to be read-only. Only the PCM
middle-layer changes / updates them. The exceptions are
- the hardware description (hw), interrupt callbacks
- (transfer_ack_xxx), DMA buffer information, and the private
- data. Besides, if you use the standard buffer allocation
+ the hardware description (hw) DMA buffer information and the
+ private data. Besides, if you use the standard buffer allocation
method via <function>snd_pcm_lib_malloc_pages()</function>,
you don't need to set the DMA buffer information by yourself.
</para>
@@ -2538,16 +2533,6 @@ struct _snd_pcm_runtime {
</para>
</section>
- <section id="pcm-interface-runtime-intr">
- <title>Interrupt Callbacks</title>
- <para>
- The field <structfield>transfer_ack_begin</structfield> and
- <structfield>transfer_ack_end</structfield> are called at
- the beginning and at the end of
- <function>snd_pcm_period_elapsed()</function>, respectively.
- </para>
- </section>
-
</section>
<section id="pcm-interface-operators">
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