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ALSA: hda: Add a power_save blacklist

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On some boards setting power_save to a non 0 value leads to clicking /
popping sounds when ever we enter/leave powersaving mode. Ideally we would
figure out how to avoid these sounds, but that is not always feasible.

This commit adds a blacklist for devices where powersaving is known to
cause problems and disables it on these devices.

Note I tried to put this blacklist in userspace first:
https://github.com/systemd/systemd/pull/8128

But the systemd maintainers rightfully pointed out that it would be
impossible to then later remove entries once we actually find a way to
make power-saving work on listed boards without issues. Having this list
in the kernel will allow removal of the blacklist entry in the same commit
which fixes the clicks / plops.

The blacklist only applies to the default power_save module-option value,
if a user explicitly sets the module-option then the blacklist is not
used.

[ added an ifdef CONFIG_PM for the build error -- tiwai]

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1525104
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=198611
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Hans de Goede 2018-02-22 14:20:35 +01:00 committed by Takashi Iwai
parent 7229b12f5d
commit 1ba8f9d308
1 changed files with 36 additions and 2 deletions
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38
sound/pci/hda/hda_intel.c
View File

@ -181,7 +181,7 @@ static const struct kernel_param_ops param_ops_xint = {
};
#define param_check_xint param_check_int
static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
static int power_save = -1;
module_param(power_save, xint, 0644);
MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
"(in second, 0 = disable).");
@ -2186,6 +2186,24 @@ out_free:
return err;
}
#ifdef CONFIG_PM
/* On some boards setting power_save to a non 0 value leads to clicking /
* popping sounds when ever we enter/leave powersaving mode. Ideally we would
* figure out how to avoid these sounds, but that is not always feasible.
* So we keep a list of devices where we disable powersaving as its known
* to causes problems on these devices.
*/
static struct snd_pci_quirk power_save_blacklist[] = {
/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
SND_PCI_QUIRK(0x1849, 0x0c0c, "Asrock B85M-ITX", 0),
/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
SND_PCI_QUIRK(0x1043, 0x8733, "Asus Prime X370-Pro", 0),
/* https://bugzilla.kernel.org/show_bug.cgi?id=198611 */
SND_PCI_QUIRK(0x17aa, 0x2227, "Lenovo X1 Carbon 3rd Gen", 0),
{}
};
#endif /* CONFIG_PM */
/* number of codec slots for each chipset: 0 = default slots (i.e. 4) */
static unsigned int azx_max_codecs[AZX_NUM_DRIVERS] = {
[AZX_DRIVER_NVIDIA] = 8,
@ -2198,6 +2216,7 @@ static int azx_probe_continue(struct azx *chip)
struct hdac_bus *bus = azx_bus(chip);
struct pci_dev *pci = chip->pci;
int dev = chip->dev_index;
int val;
int err;
hda->probe_continued = 1;
@ -2278,7 +2297,22 @@ static int azx_probe_continue(struct azx *chip)
chip->running = 1;
azx_add_card_list(chip);
snd_hda_set_power_save(&chip->bus, power_save * 1000);
val = power_save;
#ifdef CONFIG_PM
if (val == -1) {
const struct snd_pci_quirk *q;
val = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
q = snd_pci_quirk_lookup(chip->pci, power_save_blacklist);
if (q && val) {
dev_info(chip->card->dev, "device %04x:%04x is on the power_save blacklist, forcing power_save to 0\n",
q->subvendor, q->subdevice);
val = 0;
}
}
#endif /* CONFIG_PM */
snd_hda_set_power_save(&chip->bus, val * 1000);
if (azx_has_pm_runtime(chip) || hda->use_vga_switcheroo)
pm_runtime_put_autosuspend(&pci->dev);