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ALSA: hda: Enhance pm_blacklist option

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We want sometimes to keep the runtime PM disabled persistently just
like we did for the PM deny-list in the previous change, e.g. for
testing some buggy device.  This patch enhances the existing
pm_blacklist option for achieving it easily.

The default behavior doesn't change -- the driver looks up the deny
list and disables the runtime PM if matches.  However, when
pm_blacklist=1 option is set, now the driver disables the runtime PM
completely, just like the deny-list does.

Update the documentation for this option, too.

Link: https://patch.msgid.link/20240729141519.18398-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2024-07-29 16:15:17 +02:00
parent 8abe0423dd
commit 3bb668264d
2 changed files with 13 additions and 4 deletions
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3
Documentation/sound/alsa-configuration.rst
View File

@ -1059,6 +1059,9 @@ power_save
Automatic power-saving timeout (in second, 0 = disable)
power_save_controller
Reset HD-audio controller in power-saving mode (default = on)
pm_blacklist
Enable / disable power-management deny-list (default = look up PM
deny-list, 0 = skip PM deny-list, 1 = force to turn off runtime PM)
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

14
sound/pci/hda/hda_intel.c
View File

@ -175,8 +175,8 @@ module_param(power_save, xint, 0644);
MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
"(in second, 0 = disable).");
static bool pm_blacklist = true;
module_param(pm_blacklist, bool, 0644);
static int pm_blacklist = -1;
module_param(pm_blacklist, bint, 0644);
MODULE_PARM_DESC(pm_blacklist, "Enable power-management denylist");
/* reset the HD-audio controller in power save mode.
@ -188,7 +188,7 @@ module_param(power_save_controller, bool, 0644);
MODULE_PARM_DESC(power_save_controller, "Reset controller in power save mode.");
#else /* CONFIG_PM */
#define power_save 0
#define pm_blacklist false
#define pm_blacklist 0
#define power_save_controller false
#endif /* CONFIG_PM */
@ -930,6 +930,9 @@ static int __maybe_unused param_set_xint(const char *val, const struct kernel_pa
if (ret || prev == power_save)
return ret;
if (pm_blacklist > 0)
return 0;
mutex_lock(&card_list_lock);
list_for_each_entry(hda, &card_list, list) {
chip = &hda->chip;
@ -2247,7 +2250,7 @@ static void set_default_power_save(struct azx *chip)
struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
int val = power_save;
if (pm_blacklist) {
if (pm_blacklist < 0) {
const struct snd_pci_quirk *q;
q = snd_pci_quirk_lookup(chip->pci, power_save_denylist);
@ -2257,6 +2260,9 @@ static void set_default_power_save(struct azx *chip)
val = 0;
hda->runtime_pm_disabled = 1;
}
} else if (pm_blacklist > 0) {
dev_info(chip->card->dev, "Forcing power_save to 0 via option\n");
val = 0;
}
snd_hda_set_power_save(&chip->bus, val * 1000);
}