diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/hda/hdac_bus.c | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c index 3fe62be1cbcc..d497414a5538 100644 --- a/sound/hda/hdac_bus.c +++ b/sound/hda/hdac_bus.c @@ -17,6 +17,7 @@ static void snd_hdac_bus_process_unsol_events(struct work_struct *work); static const struct hdac_bus_ops default_ops = { .command = snd_hdac_bus_send_cmd, .get_response = snd_hdac_bus_get_response, + .link_power = snd_hdac_bus_link_power, }; /** @@ -46,6 +47,18 @@ 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); @@ -81,7 +94,6 @@ int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr, mutex_unlock(&bus->cmd_mutex); return err; } -EXPORT_SYMBOL_GPL(snd_hdac_bus_exec_verb); /** * snd_hdac_bus_exec_verb_unlocked - unlocked version @@ -150,7 +162,6 @@ void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex) schedule_work(&bus->unsol_work); } -EXPORT_SYMBOL_GPL(snd_hdac_bus_queue_event); /* * process queued unsolicited events @@ -162,6 +173,7 @@ static void snd_hdac_bus_process_unsol_events(struct work_struct *work) struct hdac_driver *drv; unsigned int rp, caddr, res; + spin_lock_irq(&bus->reg_lock); while (bus->unsol_rp != bus->unsol_wp) { rp = (bus->unsol_rp + 1) % HDA_UNSOL_QUEUE_SIZE; bus->unsol_rp = rp; @@ -171,12 +183,15 @@ static void snd_hdac_bus_process_unsol_events(struct work_struct *work) if (!(caddr & (1 << 4))) /* no unsolicited event? */ continue; codec = bus->caddr_tbl[caddr & 0x0f]; - if (!codec || !codec->dev.driver) + if (!codec || !codec->registered) continue; + spin_unlock_irq(&bus->reg_lock); drv = drv_to_hdac_driver(codec->dev.driver); if (drv->unsol_event) drv->unsol_event(codec, res); + spin_lock_irq(&bus->reg_lock); } + spin_unlock_irq(&bus->reg_lock); } /** @@ -250,3 +265,25 @@ void snd_hdac_aligned_write(unsigned int val, void __iomem *addr, } EXPORT_SYMBOL_GPL(snd_hdac_aligned_write); #endif /* CONFIG_SND_HDA_ALIGNED_MMIO */ + +void snd_hdac_codec_link_up(struct hdac_device *codec) +{ + struct hdac_bus *bus = codec->bus; + + if (bus->ops->link_power) + bus->ops->link_power(codec, true); + else + snd_hdac_bus_link_power(codec, true); +} +EXPORT_SYMBOL_GPL(snd_hdac_codec_link_up); + +void snd_hdac_codec_link_down(struct hdac_device *codec) +{ + struct hdac_bus *bus = codec->bus; + + if (bus->ops->link_power) + bus->ops->link_power(codec, false); + else + snd_hdac_bus_link_power(codec, false); +} +EXPORT_SYMBOL_GPL(snd_hdac_codec_link_down); |