diff options
| author | Sameer Pujar <spujar@nvidia.com> | 2020-08-19 18:32:10 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-08-19 18:37:06 +0300 |
| commit | b90b925fd52c75ee7531df739d850a1f7c58ef06 (patch) | |
| tree | b98f35f4bd2e2b318c7750a694d073a214209f99 /sound/hda/hdac_bus.c | |
| parent | e17f02d0559c174cf1f6435e45134490111eaa37 (diff) | |
| download | linux-b90b925fd52c75ee7531df739d850a1f7c58ef06.tar.xz | |
ALSA: hda: avoid reset of sdo_limit
By default 'sdo_limit' is initialized with a default value of '8'
as per spec. This is overridden in cases where a different value is
required. However this is getting reset when snd_hdac_bus_init_chip()
is called again, which happens during runtime PM cycle.
Avoid this reset by moving 'sdo_limit' setup to 'snd_hdac_bus_init()'
function which would be called only once.
Fixes: 67ae482a59e9 ("ALSA: hda: add member to store ratio for stripe control")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/1597851130-6765-1-git-send-email-spujar@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda/hdac_bus.c')
| -rw-r--r-- | sound/hda/hdac_bus.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c index 09ddab5f5cae..9766f6af8743 100644 --- a/sound/hda/hdac_bus.c +++ b/sound/hda/hdac_bus.c @@ -46,6 +46,18 @@ int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev, INIT_LIST_HEAD(&bus->hlink_list); init_waitqueue_head(&bus->rirb_wq); bus->irq = -1; + + /* + * Default value of '8' is as per the HD audio specification (Rev 1.0a). + * Following relation is used to derive STRIPE control value. + * For sample rate <= 48K: + * { ((num_channels * bits_per_sample) / number of SDOs) >= 8 } + * For sample rate > 48K: + * { ((num_channels * bits_per_sample * rate/48000) / + * number of SDOs) >= 8 } + */ + bus->sdo_limit = 8; + return 0; } EXPORT_SYMBOL_GPL(snd_hdac_bus_init); |