From a9c48f7f5906d02d4ec4aa50b1c20fccbce53eec Mon Sep 17 00:00:00 2001 From: Jeeja KP Date: Fri, 18 Dec 2015 15:11:59 +0530 Subject: ALSA: hdac: Add support for hda DMA Resume capability Skylake sports new capability of DMA resume, DRSM where we can resume the DMA. This capability is defined by presence of AZX_DRSM_CAP_ID. If this capability is present, we use this capability. So we add: snd_hdac_ext_stream_drsm_enable() - DMA resume caps snd_hdac_ext_stream_set_dpibr() - set the DMA position snd_hdac_ext_stream_set_lpib() - set the lpib Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul Reviewed-by: Takashi Iwai Signed-off-by: Mark Brown --- sound/hda/ext/hdac_ext_controller.c | 6 ++++ sound/hda/ext/hdac_ext_stream.c | 71 +++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) (limited to 'sound/hda') diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 63215b1..556267e 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 cb89ec7..8f30e88 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); -- cgit v1.1 From 88888155c555487037b894a97a2a4c6a8155cda0 Mon Sep 17 00:00:00 2001 From: Jeeja KP Date: Fri, 18 Dec 2015 15:12:00 +0530 Subject: ALSA: hdac: couple the hda DMA stream in cleanup A stream is by default in coupled mode, in DSP operation we move it to decoupled mode. On cleanup HW expects that we leave it back to default state so couple the DMA on cleanup. Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul Reviewed-by: Takashi Iwai Signed-off-by: Mark Brown --- sound/hda/ext/hdac_ext_stream.c | 1 + 1 file changed, 1 insertion(+) (limited to 'sound/hda') diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c index 8f30e88..023cc4c 100644 --- a/sound/hda/ext/hdac_ext_stream.c +++ b/sound/hda/ext/hdac_ext_stream.c @@ -111,6 +111,7 @@ void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus) while (!list_empty(&bus->stream_list)) { s = list_first_entry(&bus->stream_list, struct hdac_stream, list); stream = stream_to_hdac_ext_stream(s); + snd_hdac_ext_stream_decouple(ebus, stream, false); list_del(&s->list); kfree(stream); } -- cgit v1.1 From cf8fe58b1066cea668e030d0ab61e4b8eef8b219 Mon Sep 17 00:00:00 2001 From: Jayachandran B Date: Fri, 18 Dec 2015 15:12:01 +0530 Subject: ALSA: hdac: Increase timeout value for link power check HW recommends 180us for worst case values for link power up delay, so change the current delay value from 50 (150us) to 150 (450us) Signed-off-by: Jayachandran B Signed-off-by: Vinod Koul Reviewed-by: Takashi Iwai Signed-off-by: Mark Brown --- sound/hda/ext/hdac_ext_controller.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/hda') diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 556267e..1a55a78 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -246,7 +246,7 @@ static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable) int mask = (1 << AZX_MLCTL_CPA); udelay(3); - timeout = 50; + timeout = 150; do { val = readl(link->ml_addr + AZX_REG_ML_LCTL); -- cgit v1.1 From 6706a19747eb693ff35ce140f5cbee66dcfec0c4 Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Fri, 18 Dec 2015 15:12:02 +0530 Subject: ALSA: hdac: add snd_hdac_ext_bus_link_power_up_all We have an API for powering down all links, we need a similar one for powering up links, so add for power up as well Signed-off-by: Jayachandran B Signed-off-by: Subhransu S. Prusty Signed-off-by: Vinod Koul Reviewed-by: Takashi Iwai Signed-off-by: Mark Brown --- sound/hda/ext/hdac_ext_controller.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'sound/hda') diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 1a55a78..548cc1e 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -288,6 +288,27 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); /** + * snd_hdac_ext_bus_link_power_up_all -power up all hda link + * @ebus: HD-audio extended bus + */ +int snd_hdac_ext_bus_link_power_up_all(struct hdac_ext_bus *ebus) +{ + struct hdac_ext_link *hlink = NULL; + int ret; + + list_for_each_entry(hlink, &ebus->hlink_list, list) { + snd_hdac_updatel(hlink->ml_addr, + AZX_REG_ML_LCTL, 0, AZX_MLCTL_SPA); + ret = check_hdac_link_power_active(hlink, true); + if (ret < 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all); + +/** * snd_hdac_ext_bus_link_power_down_all -power down all hda link * @ebus: HD-audio extended bus */ -- cgit v1.1