diff options
Diffstat (limited to 'sound/hda')
| -rw-r--r-- | sound/hda/ext/hdac_ext_controller.c | 6 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_stream.c | 71 |
2 files changed, 77 insertions, 0 deletions
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 63215b17247c..556267e75591 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -77,6 +77,12 @@ int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus) ebus->spbcap = bus->remap_addr + offset; break; + case AZX_DRSM_CAP_ID: + /* DMA resume capability found, handler function */ + dev_dbg(bus->dev, "Found DRSM capability\n"); + ebus->drsmcap = bus->remap_addr + offset; + break; + default: dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap); break; diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c index cb89ec7c8147..8f30e8836818 100644 --- a/sound/hda/ext/hdac_ext_stream.c +++ b/sound/hda/ext/hdac_ext_stream.c @@ -59,6 +59,10 @@ void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus, AZX_SPB_MAXFIFO; } + if (ebus->drsmcap) + stream->dpibr_addr = ebus->drsmcap + AZX_DRSM_BASE + + AZX_DRSM_INTERVAL * idx; + stream->decoupled = false; snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag); } @@ -497,3 +501,70 @@ void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus) } } EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams); + +/** + * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream + * @ebus: HD-audio ext core bus + * @enable: flag to enable/disable DRSM + * @index: stream index for which DRSM need to be enabled + */ +void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus, + bool enable, int index) +{ + u32 mask = 0; + u32 register_mask = 0; + struct hdac_bus *bus = &ebus->bus; + + if (!ebus->drsmcap) { + dev_err(bus->dev, "Address of DRSM capability is NULL"); + return; + } + + mask |= (1 << index); + + register_mask = readl(ebus->drsmcap + AZX_REG_SPB_SPBFCCTL); + + mask |= register_mask; + + if (enable) + snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, 0, mask); + else + snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, mask, 0); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable); + +/** + * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream + * @ebus: HD-audio ext core bus + * @stream: hdac_ext_stream + * @value: dpib value to set + */ +int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus, + struct hdac_ext_stream *stream, u32 value) +{ + struct hdac_bus *bus = &ebus->bus; + + if (!ebus->drsmcap) { + dev_err(bus->dev, "Address of DRSM capability is NULL"); + return -EINVAL; + } + + writel(value, stream->dpibr_addr); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr); + +/** + * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream + * @ebus: HD-audio ext core bus + * @stream: hdac_ext_stream + * @value: lpib value to set + */ +int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value) +{ + snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib); |