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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 17:25:01 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 17:25:01 -0400 |
commit | 68d99b2c8efcb6ed3807a55569300c53b5f88be5 (patch) | |
tree | f189c8f2132d3668a2f0e503f5c3f8695b26a1c8 /Documentation/DocBook | |
parent | 0e59e7e7feb5a12938fbf9135147eeda3238c6c4 (diff) | |
parent | 8128c9f21509f9a8b6da94ac432d845dda458406 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (549 commits)
ALSA: hda - Fix ADC input-amp handling for Cx20549 codec
ALSA: hda - Keep EAPD turned on for old Conexant chips
ALSA: hda/realtek - Fix missing volume controls with ALC260
ASoC: wm8940: Properly set codec->dapm.bias_level
ALSA: hda - Fix pin-config for ASUS W90V
ALSA: hda - Fix surround/CLFE headphone and speaker pins order
ALSA: hda - Fix typo
ALSA: Update the sound git tree URL
ALSA: HDA: Add new revision for ALC662
ASoC: max98095: Convert codec->hw_write to snd_soc_write
ASoC: keep pointer to resource so it can be freed
ASoC: sgtl5000: Fix wrong mask in some snd_soc_update_bits calls
ASoC: wm8996: Fix wrong mask for setting WM8996_AIF_CLOCKING_2
ASoC: da7210: Add support for line out and DAC
ASoC: da7210: Add support for DAPM
ALSA: hda/realtek - Fix DAC assignments of multiple speakers
ASoC: Use SGTL5000_LINREG_VDDD_MASK instead of hardcoded mask value
ASoC: Set sgtl5000->ldo in ldo_regulator_register
ASoC: wm8996: Use SND_SOC_DAPM_AIF_OUT for AIF2 Capture
ASoC: wm8994: Use SND_SOC_DAPM_AIF_OUT for AIF3 Capture
...
Diffstat (limited to 'Documentation/DocBook')
-rw-r--r-- | Documentation/DocBook/writing-an-alsa-driver.tmpl | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/Documentation/DocBook/writing-an-alsa-driver.tmpl b/Documentation/DocBook/writing-an-alsa-driver.tmpl index 598c22f3b3ac..5de23c007078 100644 --- a/Documentation/DocBook/writing-an-alsa-driver.tmpl +++ b/Documentation/DocBook/writing-an-alsa-driver.tmpl | |||
@@ -4288,7 +4288,7 @@ struct _snd_pcm_runtime { | |||
4288 | <![CDATA[ | 4288 | <![CDATA[ |
4289 | struct snd_rawmidi *rmidi; | 4289 | struct snd_rawmidi *rmidi; |
4290 | snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port, info_flags, | 4290 | snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port, info_flags, |
4291 | irq, irq_flags, &rmidi); | 4291 | irq, &rmidi); |
4292 | ]]> | 4292 | ]]> |
4293 | </programlisting> | 4293 | </programlisting> |
4294 | </informalexample> | 4294 | </informalexample> |
@@ -4343,6 +4343,13 @@ struct _snd_pcm_runtime { | |||
4343 | by itself to start processing the output stream in the irq handler. | 4343 | by itself to start processing the output stream in the irq handler. |
4344 | </para> | 4344 | </para> |
4345 | 4345 | ||
4346 | <para> | ||
4347 | If the MPU-401 interface shares its interrupt with the other logical | ||
4348 | devices on the card, set <constant>MPU401_INFO_IRQ_HOOK</constant> | ||
4349 | (see <link linkend="midi-interface-interrupt-handler"><citetitle> | ||
4350 | below</citetitle></link>). | ||
4351 | </para> | ||
4352 | |||
4346 | <para> | 4353 | <para> |
4347 | Usually, the port address corresponds to the command port and | 4354 | Usually, the port address corresponds to the command port and |
4348 | port + 1 corresponds to the data port. If not, you may change | 4355 | port + 1 corresponds to the data port. If not, you may change |
@@ -4375,14 +4382,12 @@ struct _snd_pcm_runtime { | |||
4375 | </para> | 4382 | </para> |
4376 | 4383 | ||
4377 | <para> | 4384 | <para> |
4378 | The 6th argument specifies the irq number for UART. If the irq | 4385 | The 6th argument specifies the ISA irq number that will be |
4379 | is already allocated, pass 0 to the 7th argument | 4386 | allocated. If no interrupt is to be allocated (because your |
4380 | (<parameter>irq_flags</parameter>). Otherwise, pass the flags | 4387 | code is already allocating a shared interrupt, or because the |
4381 | for irq allocation | 4388 | device does not use interrupts), pass -1 instead. |
4382 | (<constant>SA_XXX</constant> bits) to it, and the irq will be | 4389 | For a MPU-401 device without an interrupt, a polling timer |
4383 | reserved by the mpu401-uart layer. If the card doesn't generate | 4390 | will be used instead. |
4384 | UART interrupts, pass -1 as the irq number. Then a timer | ||
4385 | interrupt will be invoked for polling. | ||
4386 | </para> | 4391 | </para> |
4387 | </section> | 4392 | </section> |
4388 | 4393 | ||
@@ -4390,12 +4395,13 @@ struct _snd_pcm_runtime { | |||
4390 | <title>Interrupt Handler</title> | 4395 | <title>Interrupt Handler</title> |
4391 | <para> | 4396 | <para> |
4392 | When the interrupt is allocated in | 4397 | When the interrupt is allocated in |
4393 | <function>snd_mpu401_uart_new()</function>, the private | 4398 | <function>snd_mpu401_uart_new()</function>, an exclusive ISA |
4394 | interrupt handler is used, hence you don't have anything else to do | 4399 | interrupt handler is automatically used, hence you don't have |
4395 | than creating the mpu401 stuff. Otherwise, you have to call | 4400 | anything else to do than creating the mpu401 stuff. Otherwise, you |
4396 | <function>snd_mpu401_uart_interrupt()</function> explicitly when | 4401 | have to set <constant>MPU401_INFO_IRQ_HOOK</constant>, and call |
4397 | a UART interrupt is invoked and checked in your own interrupt | 4402 | <function>snd_mpu401_uart_interrupt()</function> explicitly from your |
4398 | handler. | 4403 | own interrupt handler when it has determined that a UART interrupt |
4404 | has occurred. | ||
4399 | </para> | 4405 | </para> |
4400 | 4406 | ||
4401 | <para> | 4407 | <para> |