[PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Vinod Koul]

Skylake onwards we support GTS capability and thus can report audio link
time. This series adds support for parsing the capability and then reports
link time.

The parsing of caps is made common and moved up from extended hda to hdac.
The SKL driver and hdac extended core has been updated for this.

Mark,
	The update of the driver needs to update Skl driver, so if you can
ACK the 2nd patch, it can go along with extended audio change thru ALSA
tree.

Changes in v4:
  - fix code style
  - use hdac_readl/writel
  - add cpufeatures header

Guneshwor Singh (2):
  ALSA - hda: Add support for parsing new HDA capabilities
  ALSA - hda: Add support for link audio time reporting

Vinod Koul (3):
  ALSA: hda - move bus_parse_capabilities to core
  ALSA: convert users to core bus_parse_capabilities
  ALSA - Ext hda: remove bus_parse_capabilities

 include/sound/hda_register.h           |  36 ++++++
 include/sound/hdaudio.h                |  13 +++
 include/sound/hdaudio_ext.h            |  12 --
 sound/hda/ext/hdac_ext_controller.c    |  91 ++-------------
 sound/hda/ext/hdac_ext_stream.c        |  46 ++++----
 sound/hda/hdac_controller.c            |  75 ++++++++++++
 sound/pci/hda/hda_controller.c         | 203 ++++++++++++++++++++++++++++++++-
 sound/pci/hda/hda_controller.h         |   3 +
 sound/pci/hda/hda_intel.c              |  17 +++
 sound/soc/intel/skylake/skl-messages.c |   4 +-
 sound/soc/intel/skylake/skl-pcm.c      |   8 +-
 sound/soc/intel/skylake/skl.c          |   6 +-
 12 files changed, 386 insertions(+), 128 deletions(-)

-- 
1.9.1

[PATCH v4 1/5] ALSA: hda - move bus_parse_capabilities to core

[Vinod Koul]

HDA capability introduced recently are move to hdac core so that it can
be used by legacy driver as well. Also move the capability pointers up
to hdac_bus object.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 include/sound/hdaudio.h     | 13 ++++++++
 sound/hda/hdac_controller.c | 75 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 93e63c56f48f..56004ec8d441 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -245,6 +245,12 @@ struct hdac_rb {
 
 /*
  * HD-audio bus base driver
+ *
+ * @ppcap: pp capabilities pointer
+ * @spbcap: SPIB capabilities pointer
+ * @mlcap: MultiLink capabilities pointer
+ * @gtscap: gts capabilities pointer
+ * @drsmcap: dma resume capabilities pointer
  */
 struct hdac_bus {
 	struct device *dev;
@@ -256,6 +262,12 @@ struct hdac_bus {
 	void __iomem *remap_addr;
 	int irq;
 
+	void __iomem *ppcap;
+	void __iomem *spbcap;
+	void __iomem *mlcap;
+	void __iomem *gtscap;
+	void __iomem *drsmcap;
+
 	/* codec linked list */
 	struct list_head codec_list;
 	unsigned int num_codecs;
@@ -335,6 +347,7 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 			      unsigned int *res);
+int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 
 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 9fee464e5d49..043065867656 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -255,6 +255,81 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 }
 EXPORT_SYMBOL_GPL(snd_hdac_bus_get_response);
 
+#define HDAC_MAX_CAPS 10
+/**
+ * snd_hdac_bus_parse_capabilities - parse capability structure
+ * @bus: the pointer to bus object
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus)
+{
+	unsigned int cur_cap;
+	unsigned int offset;
+	unsigned int counter = 0;
+
+	offset = snd_hdac_chip_readl(bus, LLCH);
+
+	/* Lets walk the linked capabilities list */
+	do {
+		cur_cap = _snd_hdac_chip_read(l, bus, offset);
+
+		dev_dbg(bus->dev, "Capability version: 0x%x\n",
+			(cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF);
+
+		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
+			(cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);
+
+		switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
+		case AZX_ML_CAP_ID:
+			dev_dbg(bus->dev, "Found ML capability\n");
+			bus->mlcap = bus->remap_addr + offset;
+			break;
+
+		case AZX_GTS_CAP_ID:
+			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
+			bus->gtscap = bus->remap_addr + offset;
+			break;
+
+		case AZX_PP_CAP_ID:
+			/* PP capability found, the Audio DSP is present */
+			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
+			bus->ppcap = bus->remap_addr + offset;
+			break;
+
+		case AZX_SPB_CAP_ID:
+			/* SPIB capability found, handler function */
+			dev_dbg(bus->dev, "Found SPB capability\n");
+			bus->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");
+			bus->drsmcap = bus->remap_addr + offset;
+			break;
+
+		default:
+			dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap);
+			break;
+		}
+
+		counter++;
+
+		if (counter > HDAC_MAX_CAPS) {
+			dev_err(bus->dev, "We exceeded HDAC capabilities!!!\n");
+			break;
+		}
+
+		/* read the offset of next capability */
+		offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;
+
+	} while (offset);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_bus_parse_capabilities);
+
 /*
  * Lowlevel interface
  */
-- 
1.9.1

Applied "ALSA: hda - move bus_parse_capabilities to core" to the asoc tree

[Mark Brown]

The patch

   ALSA: hda - move bus_parse_capabilities to core

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 6720b38420a01d40dbeb8ee575eb601d612de691 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vinod.koul@intel.com>
Date: Thu, 4 Aug 2016 15:46:00 +0530
Subject: [PATCH] ALSA: hda - move bus_parse_capabilities to core

HDA capability introduced recently are move to hdac core so that it can
be used by legacy driver as well. Also move the capability pointers up
to hdac_bus object.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/sound/hdaudio.h     | 13 ++++++++
 sound/hda/hdac_controller.c | 75 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 93e63c56f48f..56004ec8d441 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -245,6 +245,12 @@ struct hdac_rb {
 
 /*
  * HD-audio bus base driver
+ *
+ * @ppcap: pp capabilities pointer
+ * @spbcap: SPIB capabilities pointer
+ * @mlcap: MultiLink capabilities pointer
+ * @gtscap: gts capabilities pointer
+ * @drsmcap: dma resume capabilities pointer
  */
 struct hdac_bus {
 	struct device *dev;
@@ -256,6 +262,12 @@ struct hdac_bus {
 	void __iomem *remap_addr;
 	int irq;
 
+	void __iomem *ppcap;
+	void __iomem *spbcap;
+	void __iomem *mlcap;
+	void __iomem *gtscap;
+	void __iomem *drsmcap;
+
 	/* codec linked list */
 	struct list_head codec_list;
 	unsigned int num_codecs;
@@ -335,6 +347,7 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 			      unsigned int *res);
+int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 
 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 9fee464e5d49..043065867656 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -255,6 +255,81 @@ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 }
 EXPORT_SYMBOL_GPL(snd_hdac_bus_get_response);
 
+#define HDAC_MAX_CAPS 10
+/**
+ * snd_hdac_bus_parse_capabilities - parse capability structure
+ * @bus: the pointer to bus object
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus)
+{
+	unsigned int cur_cap;
+	unsigned int offset;
+	unsigned int counter = 0;
+
+	offset = snd_hdac_chip_readl(bus, LLCH);
+
+	/* Lets walk the linked capabilities list */
+	do {
+		cur_cap = _snd_hdac_chip_read(l, bus, offset);
+
+		dev_dbg(bus->dev, "Capability version: 0x%x\n",
+			(cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF);
+
+		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
+			(cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);
+
+		switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
+		case AZX_ML_CAP_ID:
+			dev_dbg(bus->dev, "Found ML capability\n");
+			bus->mlcap = bus->remap_addr + offset;
+			break;
+
+		case AZX_GTS_CAP_ID:
+			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
+			bus->gtscap = bus->remap_addr + offset;
+			break;
+
+		case AZX_PP_CAP_ID:
+			/* PP capability found, the Audio DSP is present */
+			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
+			bus->ppcap = bus->remap_addr + offset;
+			break;
+
+		case AZX_SPB_CAP_ID:
+			/* SPIB capability found, handler function */
+			dev_dbg(bus->dev, "Found SPB capability\n");
+			bus->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");
+			bus->drsmcap = bus->remap_addr + offset;
+			break;
+
+		default:
+			dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap);
+			break;
+		}
+
+		counter++;
+
+		if (counter > HDAC_MAX_CAPS) {
+			dev_err(bus->dev, "We exceeded HDAC capabilities!!!\n");
+			break;
+		}
+
+		/* read the offset of next capability */
+		offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;
+
+	} while (offset);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_bus_parse_capabilities);
+
 /*
  * Lowlevel interface
  */
-- 
2.8.1

[PATCH v4 2/5] ALSA: convert users to core bus_parse_capabilities

[Vinod Koul]

Now that we have the bus parse capabilities moved to core, we need to
convert users.

The SKL driver and HDA extended lib needs to converted in single patch,
otherwise we regress on the functionality.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 sound/hda/ext/hdac_ext_controller.c    | 16 ++++++------
 sound/hda/ext/hdac_ext_stream.c        | 46 +++++++++++++++++-----------------
 sound/soc/intel/skylake/skl-messages.c |  4 +--
 sound/soc/intel/skylake/skl-pcm.c      |  8 +++---
 sound/soc/intel/skylake/skl.c          |  6 ++---
 5 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
index 860f8cad6602..cd65e007e864 100644
--- a/sound/hda/ext/hdac_ext_controller.c
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -118,15 +118,15 @@ void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *ebus, bool enable)
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->ppcap) {
+	if (!bus->ppcap) {
 		dev_err(bus->dev, "Address of PP capability is NULL");
 		return;
 	}
 
 	if (enable)
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_GPROCEN);
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_GPROCEN);
 	else
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, 0);
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_GPROCEN, 0);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable);
 
@@ -139,15 +139,15 @@ void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *ebus, bool enable)
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->ppcap) {
+	if (!bus->ppcap) {
 		dev_err(bus->dev, "Address of PP capability is NULL\n");
 		return;
 	}
 
 	if (enable)
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_PIE);
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, 0, AZX_PPCTL_PIE);
 	else
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, 0);
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, AZX_PPCTL_PIE, 0);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable);
 
@@ -171,7 +171,7 @@ int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_ext_bus *ebus)
 	struct hdac_ext_link *hlink;
 	struct hdac_bus *bus = &ebus->bus;
 
-	link_count = readl(ebus->mlcap + AZX_REG_ML_MLCD) + 1;
+	link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1;
 
 	dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count);
 
@@ -181,7 +181,7 @@ int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_ext_bus *ebus)
 			return -ENOMEM;
 		hlink->index = idx;
 		hlink->bus = bus;
-		hlink->ml_addr = ebus->mlcap + AZX_ML_BASE +
+		hlink->ml_addr = bus->mlcap + AZX_ML_BASE +
 					(AZX_ML_INTERVAL * idx);
 		hlink->lcaps  = readl(hlink->ml_addr + AZX_REG_ML_LCAP);
 		hlink->lsdiid = readw(hlink->ml_addr + AZX_REG_ML_LSDIID);
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
index 626f3bb24c55..2441273adcef 100644
--- a/sound/hda/ext/hdac_ext_stream.c
+++ b/sound/hda/ext/hdac_ext_stream.c
@@ -40,27 +40,27 @@ void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus,
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (ebus->ppcap) {
-		stream->pphc_addr = ebus->ppcap + AZX_PPHC_BASE +
+	if (bus->ppcap) {
+		stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
 				AZX_PPHC_INTERVAL * idx;
 
-		stream->pplc_addr = ebus->ppcap + AZX_PPLC_BASE +
+		stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
 				AZX_PPLC_MULTI * ebus->num_streams +
 				AZX_PPLC_INTERVAL * idx;
 	}
 
-	if (ebus->spbcap) {
-		stream->spib_addr = ebus->spbcap + AZX_SPB_BASE +
+	if (bus->spbcap) {
+		stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
 					AZX_SPB_INTERVAL * idx +
 					AZX_SPB_SPIB;
 
-		stream->fifo_addr = ebus->spbcap + AZX_SPB_BASE +
+		stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
 					AZX_SPB_INTERVAL * idx +
 					AZX_SPB_MAXFIFO;
 	}
 
-	if (ebus->drsmcap)
-		stream->dpibr_addr = ebus->drsmcap + AZX_DRSM_BASE +
+	if (bus->drsmcap)
+		stream->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE +
 					AZX_DRSM_INTERVAL * idx;
 
 	stream->decoupled = false;
@@ -131,10 +131,10 @@ void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
 
 	spin_lock_irq(&bus->reg_lock);
 	if (decouple)
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0,
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, 0,
 				AZX_PPCTL_PROCEN(hstream->index));
 	else
-		snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL,
+		snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
 					AZX_PPCTL_PROCEN(hstream->index), 0);
 	stream->decoupled = decouple;
 	spin_unlock_irq(&bus->reg_lock);
@@ -255,7 +255,7 @@ hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus,
 	struct hdac_stream *stream = NULL;
 	struct hdac_bus *hbus = &ebus->bus;
 
-	if (!ebus->ppcap) {
+	if (!hbus->ppcap) {
 		dev_err(hbus->dev, "stream type not supported\n");
 		return NULL;
 	}
@@ -296,7 +296,7 @@ hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus,
 	struct hdac_stream *stream = NULL;
 	struct hdac_bus *hbus = &ebus->bus;
 
-	if (!ebus->ppcap) {
+	if (!hbus->ppcap) {
 		dev_err(hbus->dev, "stream type not supported\n");
 		return NULL;
 	}
@@ -423,21 +423,21 @@ void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus,
 	u32 register_mask = 0;
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->spbcap) {
+	if (!bus->spbcap) {
 		dev_err(bus->dev, "Address of SPB capability is NULL");
 		return;
 	}
 
 	mask |= (1 << index);
 
-	register_mask = readl(ebus->spbcap + AZX_REG_SPB_SPBFCCTL);
+	register_mask = readl(bus->spbcap + AZX_REG_SPB_SPBFCCTL);
 
 	mask |= register_mask;
 
 	if (enable)
-		snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
+		snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
 	else
-		snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
+		snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
 
@@ -452,7 +452,7 @@ int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->spbcap) {
+	if (!bus->spbcap) {
 		dev_err(bus->dev, "Address of SPB capability is NULL");
 		return -EINVAL;
 	}
@@ -475,7 +475,7 @@ int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus,
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->spbcap) {
+	if (!bus->spbcap) {
 		dev_err(bus->dev, "Address of SPB capability is NULL");
 		return -EINVAL;
 	}
@@ -515,21 +515,21 @@ void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus,
 	u32 register_mask = 0;
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->drsmcap) {
+	if (!bus->drsmcap) {
 		dev_err(bus->dev, "Address of DRSM capability is NULL");
 		return;
 	}
 
 	mask |= (1 << index);
 
-	register_mask = readl(ebus->drsmcap + AZX_REG_SPB_SPBFCCTL);
+	register_mask = readl(bus->drsmcap + AZX_REG_SPB_SPBFCCTL);
 
 	mask |= register_mask;
 
 	if (enable)
-		snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, 0, mask);
+		snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, 0, mask);
 	else
-		snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
+		snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
 
@@ -544,7 +544,7 @@ int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus,
 {
 	struct hdac_bus *bus = &ebus->bus;
 
-	if (!ebus->drsmcap) {
+	if (!bus->drsmcap) {
 		dev_err(bus->dev, "Address of DRSM capability is NULL");
 		return -EINVAL;
 	}
diff --git a/sound/soc/intel/skylake/skl-messages.c b/sound/soc/intel/skylake/skl-messages.c
index 44ab595ce21a..83a731fc884e 100644
--- a/sound/soc/intel/skylake/skl-messages.c
+++ b/sound/soc/intel/skylake/skl-messages.c
@@ -296,7 +296,7 @@ int skl_suspend_dsp(struct skl *skl)
 	int ret;
 
 	/* if ppcap is not supported return 0 */
-	if (!skl->ebus.ppcap)
+	if (!skl->ebus.bus.ppcap)
 		return 0;
 
 	ret = skl_dsp_sleep(ctx->dsp);
@@ -316,7 +316,7 @@ int skl_resume_dsp(struct skl *skl)
 	int ret;
 
 	/* if ppcap is not supported return 0 */
-	if (!skl->ebus.ppcap)
+	if (!skl->ebus.bus.ppcap)
 		return 0;
 
 	/* enable ppcap interrupt */
diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index 6e05bf8622f7..5ae86c227d45 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -106,7 +106,7 @@ static void skl_set_pcm_constrains(struct hdac_ext_bus *ebus,
 
 static enum hdac_ext_stream_type skl_get_host_stream_type(struct hdac_ext_bus *ebus)
 {
-	if (ebus->ppcap)
+	if ((ebus_to_hbus(ebus))->ppcap)
 		return HDAC_EXT_STREAM_TYPE_HOST;
 	else
 		return HDAC_EXT_STREAM_TYPE_COUPLED;
@@ -188,7 +188,7 @@ static int skl_get_format(struct snd_pcm_substream *substream,
 	struct hdac_ext_bus *ebus = dev_get_drvdata(dai->dev);
 	int format_val = 0;
 
-	if (ebus->ppcap) {
+	if ((ebus_to_hbus(ebus))->ppcap) {
 		struct snd_pcm_runtime *runtime = substream->runtime;
 
 		format_val = snd_hdac_calc_stream_format(runtime->rate,
@@ -1020,7 +1020,7 @@ static int skl_platform_pcm_trigger(struct snd_pcm_substream *substream,
 {
 	struct hdac_ext_bus *ebus = get_bus_ctx(substream);
 
-	if (!ebus->ppcap)
+	if ((ebus_to_hbus(ebus))->ppcap)
 		return skl_coupled_trigger(substream, cmd);
 
 	return 0;
@@ -1144,7 +1144,7 @@ static int skl_platform_soc_probe(struct snd_soc_platform *platform)
 	struct skl *skl = ebus_to_skl(ebus);
 	int ret;
 
-	if (ebus->ppcap) {
+	if ((ebus_to_hbus(ebus))->ppcap) {
 		ret = skl_tplg_init(platform, ebus);
 		if (ret < 0) {
 			dev_err(platform->dev, "Failed to init topology!\n");
diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index cd59536a761d..a893ca13be8e 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -587,7 +587,7 @@ static int skl_first_init(struct hdac_ext_bus *ebus)
 		return -ENXIO;
 	}
 
-	snd_hdac_ext_bus_parse_capabilities(ebus);
+	snd_hdac_bus_parse_capabilities(bus);
 
 	if (skl_acquire_irq(ebus, 0) < 0)
 		return -EBUSY;
@@ -682,7 +682,7 @@ static int skl_probe(struct pci_dev *pci,
 	skl_dmic_data.dmic_num = skl_get_dmic_geo(skl);
 
 	/* check if dsp is there */
-	if (ebus->ppcap) {
+	if (bus->ppcap) {
 		err = skl_machine_device_register(skl,
 				  (void *)pci_id->driver_data);
 		if (err < 0)
@@ -696,7 +696,7 @@ static int skl_probe(struct pci_dev *pci,
 		skl->skl_sst->enable_miscbdcge = skl_enable_miscbdcge;
 
 	}
-	if (ebus->mlcap)
+	if (bus->mlcap)
 		snd_hdac_ext_bus_get_ml_capabilities(ebus);
 
 	/* create device for soc dmic */
-- 
1.9.1

[PATCH v4 3/5] ALSA - Ext hda: remove bus_parse_capabilities

[Vinod Koul]

Remove the unused one as we have moved it up to hdac core.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 include/sound/hdaudio_ext.h         | 12 ------
 sound/hda/ext/hdac_ext_controller.c | 75 -------------------------------------
 2 files changed, 87 deletions(-)

diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index b9593b201599..8660a7f10851 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -8,11 +8,6 @@
  *
  * @bus: hdac bus
  * @num_streams: streams supported
- * @ppcap: pp capabilities pointer
- * @spbcap: SPIB capabilities pointer
- * @mlcap: MultiLink capabilities pointer
- * @gtscap: gts capabilities pointer
- * @drsmcap: dma resume capabilities pointer
  * @hlink_list: link list of HDA links
  * @lock: lock for link mgmt
  * @cmd_dma_state: state of cmd DMAs: CORB and RIRB
@@ -22,12 +17,6 @@ struct hdac_ext_bus {
 	int num_streams;
 	int idx;
 
-	void __iomem *ppcap;
-	void __iomem *spbcap;
-	void __iomem *mlcap;
-	void __iomem *gtscap;
-	void __iomem *drsmcap;
-
 	struct list_head hlink_list;
 
 	struct mutex lock;
@@ -54,7 +43,6 @@ void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus);
 #define HDA_CODEC_EXT_ENTRY(_vid, _revid, _name, _drv_data) \
 	HDA_CODEC_REV_EXT_ENTRY(_vid, _revid, _name, _drv_data)
 
-int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *sbus);
 void snd_hdac_ext_bus_ppcap_enable(struct hdac_ext_bus *chip, bool enable);
 void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_ext_bus *chip, bool enable);
 
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
index cd65e007e864..261469188566 100644
--- a/sound/hda/ext/hdac_ext_controller.c
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -29,81 +29,6 @@
  */
 #define HDAC_MAX_CAPS 10
 
-/**
- * snd_hdac_ext_bus_parse_capabilities - parse capablity structure
- * @ebus: the pointer to extended bus object
- *
- * Returns 0 if successful, or a negative error code.
- */
-int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus)
-{
-	unsigned int cur_cap;
-	unsigned int offset;
-	struct hdac_bus *bus = &ebus->bus;
-	unsigned int counter = 0;
-
-	offset = snd_hdac_chip_readl(bus, LLCH);
-
-	/* Lets walk the linked capabilities list */
-	do {
-		cur_cap = _snd_hdac_chip_read(l, bus, offset);
-
-		dev_dbg(bus->dev, "Capability version: 0x%x\n",
-				((cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF));
-
-		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
-				(cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);
-
-		switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
-		case AZX_ML_CAP_ID:
-			dev_dbg(bus->dev, "Found ML capability\n");
-			ebus->mlcap = bus->remap_addr + offset;
-			break;
-
-		case AZX_GTS_CAP_ID:
-			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
-			ebus->gtscap = bus->remap_addr + offset;
-			break;
-
-		case AZX_PP_CAP_ID:
-			/* PP capability found, the Audio DSP is present */
-			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
-			ebus->ppcap = bus->remap_addr + offset;
-			break;
-
-		case AZX_SPB_CAP_ID:
-			/* SPIB capability found, handler function */
-			dev_dbg(bus->dev, "Found SPB capability\n");
-			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;
-		}
-
-		counter++;
-
-		if (counter > HDAC_MAX_CAPS) {
-			dev_err(bus->dev, "We exceeded HDAC Ext capablities!!!\n");
-			break;
-		}
-
-		/* read the offset of next capabiity */
-		offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;
-
-	} while (offset);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_parse_capabilities);
-
 /*
  * processing pipe helpers - these helpers are useful for dealing with HDA
  * new capability of processing pipelines
-- 
1.9.1

[PATCH v4 4/5] ALSA - hda: Add support for parsing new HDA capabilities

[Vinod Koul]

From: Guneshwor Singh <guneshwor.o.singh@intel.com>

Skylake onwards HDA controller supports new capabilities like
Global Time Stamping (GTS) capability. So add support to parse
these new capabilities.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---
 include/sound/hda_register.h   | 36 ++++++++++++++++++++++++++++++++++++
 sound/pci/hda/hda_controller.c |  5 +++++
 sound/pci/hda/hda_controller.h |  3 +++
 sound/pci/hda/hda_intel.c      | 17 +++++++++++++++++
 4 files changed, 61 insertions(+)

diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
index ff1aecf325e8..0013063db7f2 100644
--- a/include/sound/hda_register.h
+++ b/include/sound/hda_register.h
@@ -89,6 +89,19 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
 #define AZX_REG_SD_BDLPL		0x18
 #define AZX_REG_SD_BDLPU		0x1c
 
+/* GTS registers */
+#define AZX_REG_LLCH			0x14
+
+#define AZX_REG_GTS_BASE		0x520
+
+#define AZX_REG_GTSCC	(AZX_REG_GTS_BASE + 0x00)
+#define AZX_REG_WALFCC	(AZX_REG_GTS_BASE + 0x04)
+#define AZX_REG_TSCCL	(AZX_REG_GTS_BASE + 0x08)
+#define AZX_REG_TSCCU	(AZX_REG_GTS_BASE + 0x0C)
+#define AZX_REG_LLPFOC	(AZX_REG_GTS_BASE + 0x14)
+#define AZX_REG_LLPCL	(AZX_REG_GTS_BASE + 0x18)
+#define AZX_REG_LLPCU	(AZX_REG_GTS_BASE + 0x1C)
+
 /* Haswell/Broadwell display HD-A controller Extended Mode registers */
 #define AZX_REG_HSW_EM4			0x100c
 #define AZX_REG_HSW_EM5			0x1010
@@ -242,6 +255,29 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
 /* Interval used to calculate the iterating register offset */
 #define AZX_DRSM_INTERVAL		0x08
 
+/* Global time synchronization registers */
+#define GTSCC_TSCCD_MASK		0x80000000
+#define GTSCC_TSCCD_SHIFT		BIT(31)
+#define GTSCC_TSCCI_MASK		0x20
+#define GTSCC_CDMAS_DMA_DIR_SHIFT	4
+
+#define WALFCC_CIF_MASK			0x1FF
+#define WALFCC_FN_SHIFT			9
+#define HDA_CLK_CYCLES_PER_FRAME	512
+
+/*
+ * An error occurs near frame "rollover". The clocks in frame value indicates
+ * whether this error may have occurred. Here we use the value of 10. Please
+ * see the errata for the right number [<10]
+ */
+#define HDA_MAX_CYCLE_VALUE		499
+#define HDA_MAX_CYCLE_OFFSET		10
+#define HDA_MAX_CYCLE_READ_RETRY	10
+
+#define TSCCU_CCU_SHIFT			32
+#define LLPC_CCU_SHIFT			32
+
+
 /*
  * helpers to read the stream position
  */
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 27de8015717d..1567fe209e01 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -412,6 +412,11 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
 		goto unlock;
 	}
 	runtime->private_data = azx_dev;
+
+	if (chip->gts_present)
+		azx_pcm_hw.info = azx_pcm_hw.info |
+			SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME;
+
 	runtime->hw = azx_pcm_hw;
 	runtime->hw.channels_min = hinfo->channels_min;
 	runtime->hw.channels_max = hinfo->channels_max;
diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
index ec63bbf1ec6d..a50e0532622a 100644
--- a/sound/pci/hda/hda_controller.h
+++ b/sound/pci/hda/hda_controller.h
@@ -159,6 +159,9 @@ struct azx {
 	unsigned int region_requested:1;
 	unsigned int disabled:1; /* disabled by vga_switcheroo */
 
+	/* GTS present */
+	unsigned int gts_present:1;
+
 #ifdef CONFIG_SND_HDA_DSP_LOADER
 	struct azx_dev saved_azx_dev;
 #endif
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 89dacf9b4e6c..4786f435eb64 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -54,6 +54,7 @@
 /* for snoop control */
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>
+#include <asm/cpufeature.h>
 #endif
 #include <sound/core.h>
 #include <sound/initval.h>
@@ -1655,6 +1656,22 @@ static int azx_first_init(struct azx *chip)
 		return -ENXIO;
 	}
 
+	if (IS_SKL_PLUS(pci))
+		snd_hdac_bus_parse_capabilities(bus);
+
+	/*
+	 * Some Intel CPUs has always running timer (ART) feature and
+	 * controller may have Global time sync reporting capability, so
+	 * check both of these before declaring synchronized time reporting
+	 * capability SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME
+	 */
+	chip->gts_present = false;
+
+#ifdef CONFIG_X86
+	if (bus->ppcap && boot_cpu_has(X86_FEATURE_ART))
+		chip->gts_present = true;
+#endif
+
 	if (chip->msi) {
 		if (chip->driver_caps & AZX_DCAPS_NO_MSI64) {
 			dev_dbg(card->dev, "Disabling 64bit MSI\n");
-- 
1.9.1

Applied "ALSA - hda: Add support for parsing new HDA capabilities" to the asoc tree

[Mark Brown]

The patch

   ALSA - hda: Add support for parsing new HDA capabilities

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 50279d9b5facde811280afe13dd8c79f0e7b21ed Mon Sep 17 00:00:00 2001
From: Guneshwor Singh <guneshwor.o.singh@intel.com>
Date: Thu, 4 Aug 2016 15:46:03 +0530
Subject: [PATCH] ALSA - hda: Add support for parsing new HDA capabilities

Skylake onwards HDA controller supports new capabilities like
Global Time Stamping (GTS) capability. So add support to parse
these new capabilities.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/sound/hda_register.h   | 36 ++++++++++++++++++++++++++++++++++++
 sound/pci/hda/hda_controller.c |  5 +++++
 sound/pci/hda/hda_controller.h |  3 +++
 sound/pci/hda/hda_intel.c      | 17 +++++++++++++++++
 4 files changed, 61 insertions(+)

diff --git a/include/sound/hda_register.h b/include/sound/hda_register.h
index ff1aecf325e8..0013063db7f2 100644
--- a/include/sound/hda_register.h
+++ b/include/sound/hda_register.h
@@ -89,6 +89,19 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
 #define AZX_REG_SD_BDLPL		0x18
 #define AZX_REG_SD_BDLPU		0x1c
 
+/* GTS registers */
+#define AZX_REG_LLCH			0x14
+
+#define AZX_REG_GTS_BASE		0x520
+
+#define AZX_REG_GTSCC	(AZX_REG_GTS_BASE + 0x00)
+#define AZX_REG_WALFCC	(AZX_REG_GTS_BASE + 0x04)
+#define AZX_REG_TSCCL	(AZX_REG_GTS_BASE + 0x08)
+#define AZX_REG_TSCCU	(AZX_REG_GTS_BASE + 0x0C)
+#define AZX_REG_LLPFOC	(AZX_REG_GTS_BASE + 0x14)
+#define AZX_REG_LLPCL	(AZX_REG_GTS_BASE + 0x18)
+#define AZX_REG_LLPCU	(AZX_REG_GTS_BASE + 0x1C)
+
 /* Haswell/Broadwell display HD-A controller Extended Mode registers */
 #define AZX_REG_HSW_EM4			0x100c
 #define AZX_REG_HSW_EM5			0x1010
@@ -242,6 +255,29 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
 /* Interval used to calculate the iterating register offset */
 #define AZX_DRSM_INTERVAL		0x08
 
+/* Global time synchronization registers */
+#define GTSCC_TSCCD_MASK		0x80000000
+#define GTSCC_TSCCD_SHIFT		BIT(31)
+#define GTSCC_TSCCI_MASK		0x20
+#define GTSCC_CDMAS_DMA_DIR_SHIFT	4
+
+#define WALFCC_CIF_MASK			0x1FF
+#define WALFCC_FN_SHIFT			9
+#define HDA_CLK_CYCLES_PER_FRAME	512
+
+/*
+ * An error occurs near frame "rollover". The clocks in frame value indicates
+ * whether this error may have occurred. Here we use the value of 10. Please
+ * see the errata for the right number [<10]
+ */
+#define HDA_MAX_CYCLE_VALUE		499
+#define HDA_MAX_CYCLE_OFFSET		10
+#define HDA_MAX_CYCLE_READ_RETRY	10
+
+#define TSCCU_CCU_SHIFT			32
+#define LLPC_CCU_SHIFT			32
+
+
 /*
  * helpers to read the stream position
  */
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 27de8015717d..1567fe209e01 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -412,6 +412,11 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
 		goto unlock;
 	}
 	runtime->private_data = azx_dev;
+
+	if (chip->gts_present)
+		azx_pcm_hw.info = azx_pcm_hw.info |
+			SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME;
+
 	runtime->hw = azx_pcm_hw;
 	runtime->hw.channels_min = hinfo->channels_min;
 	runtime->hw.channels_max = hinfo->channels_max;
diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
index ec63bbf1ec6d..a50e0532622a 100644
--- a/sound/pci/hda/hda_controller.h
+++ b/sound/pci/hda/hda_controller.h
@@ -159,6 +159,9 @@ struct azx {
 	unsigned int region_requested:1;
 	unsigned int disabled:1; /* disabled by vga_switcheroo */
 
+	/* GTS present */
+	unsigned int gts_present:1;
+
 #ifdef CONFIG_SND_HDA_DSP_LOADER
 	struct azx_dev saved_azx_dev;
 #endif
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 89dacf9b4e6c..4786f435eb64 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -54,6 +54,7 @@
 /* for snoop control */
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>
+#include <asm/cpufeature.h>
 #endif
 #include <sound/core.h>
 #include <sound/initval.h>
@@ -1655,6 +1656,22 @@ static int azx_first_init(struct azx *chip)
 		return -ENXIO;
 	}
 
+	if (IS_SKL_PLUS(pci))
+		snd_hdac_bus_parse_capabilities(bus);
+
+	/*
+	 * Some Intel CPUs has always running timer (ART) feature and
+	 * controller may have Global time sync reporting capability, so
+	 * check both of these before declaring synchronized time reporting
+	 * capability SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME
+	 */
+	chip->gts_present = false;
+
+#ifdef CONFIG_X86
+	if (bus->ppcap && boot_cpu_has(X86_FEATURE_ART))
+		chip->gts_present = true;
+#endif
+
 	if (chip->msi) {
 		if (chip->driver_caps & AZX_DCAPS_NO_MSI64) {
 			dev_dbg(card->dev, "Disabling 64bit MSI\n");
-- 
2.8.1

[PATCH v4 5/5] ALSA - hda: Add support for link audio time reporting

[Vinod Koul]

From: Guneshwor Singh <guneshwor.o.singh@intel.com>

The HDA controller from SKL onwards support additional timestamp
reporting of the link time. The link time is read from HW
registers and converted to audio values.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
---
 sound/pci/hda/hda_controller.c | 198 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 197 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 1567fe209e01..2ad3b447483f 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -27,6 +27,12 @@
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
+
+#ifdef CONFIG_X86
+/* for art-tsc conversion */
+#include <asm/tsc.h>
+#endif
+
 #include <sound/core.h>
 #include <sound/initval.h>
 #include "hda_controller.h"
@@ -337,12 +343,173 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream)
 			       azx_get_position(chip, azx_dev));
 }
 
+/*
+ * azx_scale64: Scale base by mult/div while not overflowing sanely
+ *
+ * Derived from scale64_check_overflow in kernel/time/timekeeping.c
+ *
+ * The tmestamps for a 48Khz stream can overflow after (2^64/10^9)/48K which
+ * is about 384307 ie ~4.5 days.
+ *
+ * This scales the calculation so that overflow will happen but after 2^64 /
+ * 48000 secs, which is pretty large!
+ *
+ * In caln below:
+ *	base may overflow, but since there isn’t any additional division
+ *	performed on base it’s OK
+ *	rem can’t overflow because both are 32-bit values
+ */
+
+#ifdef CONFIG_X86
+static u64 azx_scale64(u64 base, u32 num, u32 den)
+{
+	u64 rem;
+
+	rem = do_div(base, den);
+
+	base *= num;
+	rem *= num;
+
+	do_div(rem, den);
+
+	return base + rem;
+}
+
+static int azx_get_sync_time(ktime_t *device,
+		struct system_counterval_t *system, void *ctx)
+{
+	struct snd_pcm_substream *substream = ctx;
+	struct azx_dev *azx_dev = get_azx_dev(substream);
+	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
+	struct azx *chip = apcm->chip;
+	struct snd_pcm_runtime *runtime;
+	u64 ll_counter, ll_counter_l, ll_counter_h;
+	u64 tsc_counter, tsc_counter_l, tsc_counter_h;
+	u32 wallclk_ctr, wallclk_cycles;
+	bool direction;
+	u32 dma_select;
+	u32 timeout = 200;
+	u32 retry_count = 0;
+
+	runtime = substream->runtime;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		direction = 1;
+	else
+		direction = 0;
+
+	/* 0th stream tag is not used, so DMA ch 0 is for 1st stream tag */
+	do {
+		timeout = 100;
+		dma_select = (direction << GTSCC_CDMAS_DMA_DIR_SHIFT) |
+					(azx_dev->core.stream_tag - 1);
+		snd_hdac_chip_writel(azx_bus(chip), GTSCC, dma_select);
+
+		/* Enable the capture */
+		snd_hdac_chip_updatel(azx_bus(chip), GTSCC, 0, GTSCC_TSCCI_MASK);
+
+		while (timeout) {
+			if (snd_hdac_chip_readl(azx_bus(chip), GTSCC) &
+						GTSCC_TSCCD_MASK)
+				break;
+
+			timeout--;
+		}
+
+		if (!timeout) {
+			dev_err(chip->card->dev, "GTSCC capture Timedout!\n");
+			return -EIO;
+		}
+
+		/* Read wall clock counter */
+		wallclk_ctr = snd_hdac_chip_readl(azx_bus(chip), WALFCC);
+
+		/* Read TSC counter */
+		tsc_counter_l = snd_hdac_chip_readl(azx_bus(chip), TSCCL);
+		tsc_counter_h = snd_hdac_chip_readl(azx_bus(chip), TSCCU);
+
+		/* Read Link counter */
+		ll_counter_l = snd_hdac_chip_readl(azx_bus(chip), LLPCL);
+		ll_counter_h = snd_hdac_chip_readl(azx_bus(chip), LLPCU);
+
+		/* Ack: registers read done */
+		snd_hdac_chip_writel(azx_bus(chip), GTSCC, GTSCC_TSCCD_SHIFT);
+
+		tsc_counter = (tsc_counter_h << TSCCU_CCU_SHIFT) |
+						tsc_counter_l;
+
+		ll_counter = (ll_counter_h << LLPC_CCU_SHIFT) |	ll_counter_l;
+		wallclk_cycles = wallclk_ctr & WALFCC_CIF_MASK;
+
+		/*
+		 * An error occurs near frame "rollover". The clocks in
+		 * frame value indicates whether this error may have
+		 * occurred. Here we use the value of 10 i.e.,
+		 * HDA_MAX_CYCLE_OFFSET
+		 */
+		if (wallclk_cycles < HDA_MAX_CYCLE_VALUE - HDA_MAX_CYCLE_OFFSET
+					&& wallclk_cycles > HDA_MAX_CYCLE_OFFSET)
+			break;
+
+		/*
+		 * Sleep before we read again, else we may again get
+		 * value near to MAX_CYCLE. Try to sleep for different
+		 * amount of time so we dont hit the same number again
+		 */
+		udelay(retry_count++);
+
+	} while (retry_count != HDA_MAX_CYCLE_READ_RETRY);
+
+	if (retry_count == HDA_MAX_CYCLE_READ_RETRY) {
+		dev_err_ratelimited(chip->card->dev,
+			"Error in WALFCC cycle count\n");
+		return -EIO;
+	}
+
+	*device = ns_to_ktime(azx_scale64(ll_counter,
+				NSEC_PER_SEC, runtime->rate));
+	*device = ktime_add_ns(*device, (wallclk_cycles * NSEC_PER_SEC) /
+			       ((HDA_MAX_CYCLE_VALUE + 1) * runtime->rate));
+
+	*system = convert_art_to_tsc(tsc_counter);
+
+	return 0;
+}
+
+#else
+static int azx_get_sync_time(ktime_t *device,
+		struct system_counterval_t *system, void *ctx)
+{
+	return -ENXIO;
+}
+#endif
+
+static int azx_get_crosststamp(struct snd_pcm_substream *substream,
+			      struct system_device_crosststamp *xtstamp)
+{
+	return get_device_system_crosststamp(azx_get_sync_time,
+					substream, NULL, xtstamp);
+}
+
+static inline bool is_link_time_supported(struct snd_pcm_runtime *runtime,
+				struct snd_pcm_audio_tstamp_config *ts)
+{
+	if (runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME)
+		if (ts->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED)
+			return true;
+
+	return false;
+}
+
 static int azx_get_time_info(struct snd_pcm_substream *substream,
 			struct timespec *system_ts, struct timespec *audio_ts,
 			struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
 			struct snd_pcm_audio_tstamp_report *audio_tstamp_report)
 {
 	struct azx_dev *azx_dev = get_azx_dev(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct system_device_crosststamp xtstamp;
+	int ret;
 	u64 nsec;
 
 	if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) &&
@@ -361,8 +528,37 @@ static int azx_get_time_info(struct snd_pcm_substream *substream,
 		audio_tstamp_report->accuracy_report = 1; /* rest of structure is valid */
 		audio_tstamp_report->accuracy = 42; /* 24 MHz WallClock == 42ns resolution */
 
-	} else
+	} else if (is_link_time_supported(runtime, audio_tstamp_config)) {
+
+		ret = azx_get_crosststamp(substream, &xtstamp);
+		if (ret)
+			return ret;
+
+		switch (runtime->tstamp_type) {
+		case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
+			return -EINVAL;
+
+		case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
+			*system_ts = ktime_to_timespec(xtstamp.sys_monoraw);
+			break;
+
+		default:
+			*system_ts = ktime_to_timespec(xtstamp.sys_realtime);
+			break;
+
+		}
+
+		*audio_ts = ktime_to_timespec(xtstamp.device);
+
+		audio_tstamp_report->actual_type =
+			SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED;
+		audio_tstamp_report->accuracy_report = 1;
+		/* 24 MHz WallClock == 42ns resolution */
+		audio_tstamp_report->accuracy = 42;
+
+	} else {
 		audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
+	}
 
 	return 0;
 }
-- 
1.9.1

_______________________________________________
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Alsa-devel@alsa-project.org
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Applied "ALSA - hda: Add support for link audio time reporting" to the asoc tree

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 8259 bytes --]

The patch

   ALSA - hda: Add support for link audio time reporting

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From bfcba288b97f10c22fb84f0898ebfb6b468b80ea Mon Sep 17 00:00:00 2001
From: Guneshwor Singh <guneshwor.o.singh@intel.com>
Date: Thu, 4 Aug 2016 15:46:04 +0530
Subject: [PATCH] ALSA - hda: Add support for link audio time reporting

The HDA controller from SKL onwards support additional timestamp
reporting of the link time. The link time is read from HW
registers and converted to audio values.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_controller.c | 198 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 197 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 1567fe209e01..2ad3b447483f 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -27,6 +27,12 @@
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
+
+#ifdef CONFIG_X86
+/* for art-tsc conversion */
+#include <asm/tsc.h>
+#endif
+
 #include <sound/core.h>
 #include <sound/initval.h>
 #include "hda_controller.h"
@@ -337,12 +343,173 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream)
 			       azx_get_position(chip, azx_dev));
 }
 
+/*
+ * azx_scale64: Scale base by mult/div while not overflowing sanely
+ *
+ * Derived from scale64_check_overflow in kernel/time/timekeeping.c
+ *
+ * The tmestamps for a 48Khz stream can overflow after (2^64/10^9)/48K which
+ * is about 384307 ie ~4.5 days.
+ *
+ * This scales the calculation so that overflow will happen but after 2^64 /
+ * 48000 secs, which is pretty large!
+ *
+ * In caln below:
+ *	base may overflow, but since there isn’t any additional division
+ *	performed on base it’s OK
+ *	rem can’t overflow because both are 32-bit values
+ */
+
+#ifdef CONFIG_X86
+static u64 azx_scale64(u64 base, u32 num, u32 den)
+{
+	u64 rem;
+
+	rem = do_div(base, den);
+
+	base *= num;
+	rem *= num;
+
+	do_div(rem, den);
+
+	return base + rem;
+}
+
+static int azx_get_sync_time(ktime_t *device,
+		struct system_counterval_t *system, void *ctx)
+{
+	struct snd_pcm_substream *substream = ctx;
+	struct azx_dev *azx_dev = get_azx_dev(substream);
+	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
+	struct azx *chip = apcm->chip;
+	struct snd_pcm_runtime *runtime;
+	u64 ll_counter, ll_counter_l, ll_counter_h;
+	u64 tsc_counter, tsc_counter_l, tsc_counter_h;
+	u32 wallclk_ctr, wallclk_cycles;
+	bool direction;
+	u32 dma_select;
+	u32 timeout = 200;
+	u32 retry_count = 0;
+
+	runtime = substream->runtime;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		direction = 1;
+	else
+		direction = 0;
+
+	/* 0th stream tag is not used, so DMA ch 0 is for 1st stream tag */
+	do {
+		timeout = 100;
+		dma_select = (direction << GTSCC_CDMAS_DMA_DIR_SHIFT) |
+					(azx_dev->core.stream_tag - 1);
+		snd_hdac_chip_writel(azx_bus(chip), GTSCC, dma_select);
+
+		/* Enable the capture */
+		snd_hdac_chip_updatel(azx_bus(chip), GTSCC, 0, GTSCC_TSCCI_MASK);
+
+		while (timeout) {
+			if (snd_hdac_chip_readl(azx_bus(chip), GTSCC) &
+						GTSCC_TSCCD_MASK)
+				break;
+
+			timeout--;
+		}
+
+		if (!timeout) {
+			dev_err(chip->card->dev, "GTSCC capture Timedout!\n");
+			return -EIO;
+		}
+
+		/* Read wall clock counter */
+		wallclk_ctr = snd_hdac_chip_readl(azx_bus(chip), WALFCC);
+
+		/* Read TSC counter */
+		tsc_counter_l = snd_hdac_chip_readl(azx_bus(chip), TSCCL);
+		tsc_counter_h = snd_hdac_chip_readl(azx_bus(chip), TSCCU);
+
+		/* Read Link counter */
+		ll_counter_l = snd_hdac_chip_readl(azx_bus(chip), LLPCL);
+		ll_counter_h = snd_hdac_chip_readl(azx_bus(chip), LLPCU);
+
+		/* Ack: registers read done */
+		snd_hdac_chip_writel(azx_bus(chip), GTSCC, GTSCC_TSCCD_SHIFT);
+
+		tsc_counter = (tsc_counter_h << TSCCU_CCU_SHIFT) |
+						tsc_counter_l;
+
+		ll_counter = (ll_counter_h << LLPC_CCU_SHIFT) |	ll_counter_l;
+		wallclk_cycles = wallclk_ctr & WALFCC_CIF_MASK;
+
+		/*
+		 * An error occurs near frame "rollover". The clocks in
+		 * frame value indicates whether this error may have
+		 * occurred. Here we use the value of 10 i.e.,
+		 * HDA_MAX_CYCLE_OFFSET
+		 */
+		if (wallclk_cycles < HDA_MAX_CYCLE_VALUE - HDA_MAX_CYCLE_OFFSET
+					&& wallclk_cycles > HDA_MAX_CYCLE_OFFSET)
+			break;
+
+		/*
+		 * Sleep before we read again, else we may again get
+		 * value near to MAX_CYCLE. Try to sleep for different
+		 * amount of time so we dont hit the same number again
+		 */
+		udelay(retry_count++);
+
+	} while (retry_count != HDA_MAX_CYCLE_READ_RETRY);
+
+	if (retry_count == HDA_MAX_CYCLE_READ_RETRY) {
+		dev_err_ratelimited(chip->card->dev,
+			"Error in WALFCC cycle count\n");
+		return -EIO;
+	}
+
+	*device = ns_to_ktime(azx_scale64(ll_counter,
+				NSEC_PER_SEC, runtime->rate));
+	*device = ktime_add_ns(*device, (wallclk_cycles * NSEC_PER_SEC) /
+			       ((HDA_MAX_CYCLE_VALUE + 1) * runtime->rate));
+
+	*system = convert_art_to_tsc(tsc_counter);
+
+	return 0;
+}
+
+#else
+static int azx_get_sync_time(ktime_t *device,
+		struct system_counterval_t *system, void *ctx)
+{
+	return -ENXIO;
+}
+#endif
+
+static int azx_get_crosststamp(struct snd_pcm_substream *substream,
+			      struct system_device_crosststamp *xtstamp)
+{
+	return get_device_system_crosststamp(azx_get_sync_time,
+					substream, NULL, xtstamp);
+}
+
+static inline bool is_link_time_supported(struct snd_pcm_runtime *runtime,
+				struct snd_pcm_audio_tstamp_config *ts)
+{
+	if (runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME)
+		if (ts->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED)
+			return true;
+
+	return false;
+}
+
 static int azx_get_time_info(struct snd_pcm_substream *substream,
 			struct timespec *system_ts, struct timespec *audio_ts,
 			struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
 			struct snd_pcm_audio_tstamp_report *audio_tstamp_report)
 {
 	struct azx_dev *azx_dev = get_azx_dev(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct system_device_crosststamp xtstamp;
+	int ret;
 	u64 nsec;
 
 	if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) &&
@@ -361,8 +528,37 @@ static int azx_get_time_info(struct snd_pcm_substream *substream,
 		audio_tstamp_report->accuracy_report = 1; /* rest of structure is valid */
 		audio_tstamp_report->accuracy = 42; /* 24 MHz WallClock == 42ns resolution */
 
-	} else
+	} else if (is_link_time_supported(runtime, audio_tstamp_config)) {
+
+		ret = azx_get_crosststamp(substream, &xtstamp);
+		if (ret)
+			return ret;
+
+		switch (runtime->tstamp_type) {
+		case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
+			return -EINVAL;
+
+		case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
+			*system_ts = ktime_to_timespec(xtstamp.sys_monoraw);
+			break;
+
+		default:
+			*system_ts = ktime_to_timespec(xtstamp.sys_realtime);
+			break;
+
+		}
+
+		*audio_ts = ktime_to_timespec(xtstamp.device);
+
+		audio_tstamp_report->actual_type =
+			SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED;
+		audio_tstamp_report->accuracy_report = 1;
+		/* 24 MHz WallClock == 42ns resolution */
+		audio_tstamp_report->accuracy = 42;
+
+	} else {
 		audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
+	}
 
 	return 0;
 }
-- 
2.8.1


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Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Takashi Iwai]

On Thu, 04 Aug 2016 12:15:59 +0200,
Vinod Koul wrote:
> 
> Skylake onwards we support GTS capability and thus can report audio link
> time. This series adds support for parsing the capability and then reports
> link time.
> 
> The parsing of caps is made common and moved up from extended hda to hdac.
> The SKL driver and hdac extended core has been updated for this.
> 
> Mark,
> 	The update of the driver needs to update Skl driver, so if you can
> ACK the 2nd patch, it can go along with extended audio change thru ALSA
> tree.
> 
> Changes in v4:
>   - fix code style
>   - use hdac_readl/writel
>   - add cpufeatures header
> 
> Guneshwor Singh (2):
>   ALSA - hda: Add support for parsing new HDA capabilities
>   ALSA - hda: Add support for link audio time reporting
> 
> Vinod Koul (3):
>   ALSA: hda - move bus_parse_capabilities to core
>   ALSA: convert users to core bus_parse_capabilities
>   ALSA - Ext hda: remove bus_parse_capabilities

Looks good, but I'm going to apply it for 4.9, as the 4.8 merge window
already started and closed soon.

Mark, please merge back to your intel topic branch later if needed.


thanks,

Takashi

> 
>  include/sound/hda_register.h           |  36 ++++++
>  include/sound/hdaudio.h                |  13 +++
>  include/sound/hdaudio_ext.h            |  12 --
>  sound/hda/ext/hdac_ext_controller.c    |  91 ++-------------
>  sound/hda/ext/hdac_ext_stream.c        |  46 ++++----
>  sound/hda/hdac_controller.c            |  75 ++++++++++++
>  sound/pci/hda/hda_controller.c         | 203 ++++++++++++++++++++++++++++++++-
>  sound/pci/hda/hda_controller.h         |   3 +
>  sound/pci/hda/hda_intel.c              |  17 +++
>  sound/soc/intel/skylake/skl-messages.c |   4 +-
>  sound/soc/intel/skylake/skl-pcm.c      |   8 +-
>  sound/soc/intel/skylake/skl.c          |   6 +-
>  12 files changed, 386 insertions(+), 128 deletions(-)
> 
> -- 
> 1.9.1
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 188 bytes --]

On Fri, Aug 05, 2016 at 02:12:52PM +0200, Takashi Iwai wrote:

> Mark, please merge back to your intel topic branch later if needed.

Can you let me know when there's a tag for it please?

[-- Attachment #1.2: signature.asc --]
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Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Takashi Iwai]

On Fri, 05 Aug 2016 14:16:55 +0200,
Mark Brown wrote:
> 
> On Fri, Aug 05, 2016 at 02:12:52PM +0200, Takashi Iwai wrote:
> 
> > Mark, please merge back to your intel topic branch later if needed.
> 
> Can you let me know when there's a tag for it please?

It's not published yet.  I'm going to publish after rebasing onto
4.8-rc1 and ping you again.


thanks,

Takashi

Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Takashi Iwai]

On Fri, 05 Aug 2016 14:26:35 +0200,
Takashi Iwai wrote:
> 
> On Fri, 05 Aug 2016 14:16:55 +0200,
> Mark Brown wrote:
> > 
> > On Fri, Aug 05, 2016 at 02:12:52PM +0200, Takashi Iwai wrote:
> > 
> > > Mark, please merge back to your intel topic branch later if needed.
> > 
> > Can you let me know when there's a tag for it please?
> 
> It's not published yet.  I'm going to publish after rebasing onto
> 4.8-rc1 and ping you again.

Pushed to topic/hda-link-time branch.

BTW, now all the feature of hammock harbor has been implemented in the
kernel side?  Or any patch missing?


Takashi

Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Vinod Koul]

On Tue, Aug 09, 2016 at 09:00:54AM +0200, Takashi Iwai wrote:
> On Fri, 05 Aug 2016 14:26:35 +0200,
> Takashi Iwai wrote:
> > 
> > On Fri, 05 Aug 2016 14:16:55 +0200,
> > Mark Brown wrote:
> > > 
> > > On Fri, Aug 05, 2016 at 02:12:52PM +0200, Takashi Iwai wrote:
> > > 
> > > > Mark, please merge back to your intel topic branch later if needed.
> > > 
> > > Can you let me know when there's a tag for it please?
> > 
> > It's not published yet.  I'm going to publish after rebasing onto
> > 4.8-rc1 and ping you again.
> 
> Pushed to topic/hda-link-time branch.

Thanks :)

> BTW, now all the feature of hammock harbor has been implemented in the
> kernel side?  Or any patch missing?

Yes from my side we are done for HDA part. I2S part for asoc driver will
follow sometime later.

-- 
~Vinod

Re: [PATCH v4 0/5] ALSA - hda: Add support for link audio time reporting

[Vinod Koul]

On Fri, Aug 05, 2016 at 02:12:52PM +0200, Takashi Iwai wrote:
> On Thu, 04 Aug 2016 12:15:59 +0200,
> Vinod Koul wrote:
> 
> Looks good, but I'm going to apply it for 4.9, as the 4.8 merge window
> already started and closed soon.

Sound perfectly okay to me :-)

Let me know when you push it out.

-- 
~Vinod