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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: 67ae482a59 ("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>
This commit is contained in:
Sameer Pujar 2020-08-19 21:02:10 +05:30 committed by Takashi Iwai
parent e17f02d055
commit b90b925fd5
2 changed files with 12 additions and 11 deletions
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12
sound/hda/hdac_bus.c
View File

@ -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);

11
sound/hda/hdac_controller.c
View File

@ -529,17 +529,6 @@ bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset)
bus->chip_init = true;
/*
* 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 true;
}
EXPORT_SYMBOL_GPL(snd_hdac_bus_init_chip);