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ALSA: hda - Allow power_save_controller option override DCAPS 

Change the power_save_controller option to bint from bool so that user
can override the runtime PM capability bit and force to enable or
disable the runtime PM.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2013-01-09 11:15:13 +01:00
parent f4f0a8c478
commit 6ab317419c
2 changed files with 7 additions and 4 deletions
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5
Documentation/sound/alsa/ALSA-Configuration.txt
View File

@ -890,8 +890,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
power_save - Automatic power-saving timeout (in second, 0 =
disable)
power_save_controller - Reset HD-audio controller in power-saving mode
(default = on)
power_save_controller - Support runtime D3 of HD-audio controller
(-1 = on for supported chip (default), false = off,
true = force to on even for unsupported hardware)
align_buffer_size - Force rounding of buffer/period sizes to multiples
of 128 bytes. This is more efficient in terms of memory
access but isn't required by the HDA spec and prevents

6
sound/pci/hda/hda_intel.c
View File

@ -134,8 +134,8 @@ MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
* this may give more power-saving, but will take longer time to
* wake up.
*/
static bool power_save_controller = 1;
module_param(power_save_controller, bool, 0644);
static int power_save_controller = -1;
module_param(power_save_controller, bint, 0644);
MODULE_PARM_DESC(power_save_controller, "Reset controller in power save mode.");
#endif /* CONFIG_PM */
@ -2711,6 +2711,8 @@ static int azx_runtime_idle(struct device *dev)
struct snd_card *card = dev_get_drvdata(dev);
struct azx *chip = card->private_data;
if (power_save_controller > 0)
return 0;
if (!power_save_controller ||
!(chip->driver_caps & AZX_DCAPS_PM_RUNTIME))
return -EBUSY;