[RFC PATCH 05/16] soundwire: stream: special-case the bus compute_params() routine

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For BPT support, we want to allocate the entire audio payload and
bypass the allocation based on PCM/PDM parameters.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
 drivers/soundwire/amd_manager.c               |  2 +-
 .../soundwire/generic_bandwidth_allocation.c  | 84 ++++++++++++++++++-
 drivers/soundwire/qcom.c                      |  2 +-
 drivers/soundwire/stream.c                    |  6 +-
 include/linux/soundwire/sdw.h                 |  4 +-
 5 files changed, 91 insertions(+), 7 deletions(-)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index a3b1f4e6f0f9..96480f6ddd3f 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -389,7 +389,7 @@ static u32 amd_sdw_read_ping_status(struct sdw_bus *bus)
 	return slave_stat;
 }
 
-static int amd_sdw_compute_params(struct sdw_bus *bus)
+static int amd_sdw_compute_params(struct sdw_bus *bus, bool bpt_stream)
 {
 	struct sdw_transport_data t_data = {0};
 	struct sdw_master_runtime *m_rt;
diff --git a/drivers/soundwire/generic_bandwidth_allocation.c b/drivers/soundwire/generic_bandwidth_allocation.c
index c70a63d009ae..04083122acde 100644
--- a/drivers/soundwire/generic_bandwidth_allocation.c
+++ b/drivers/soundwire/generic_bandwidth_allocation.c
@@ -81,6 +81,82 @@ void sdw_compute_slave_ports(struct sdw_master_runtime *m_rt,
 }
 EXPORT_SYMBOL(sdw_compute_slave_ports);
 
+static void sdw_compute_slave_dp0_ports(struct sdw_master_runtime *m_rt,
+					struct sdw_transport_data *t_data)
+{
+	struct sdw_slave_runtime *s_rt = NULL;
+	struct sdw_port_runtime *p_rt;
+	int port_bo;
+	int sample_int;
+	unsigned int bps;
+
+	port_bo = t_data->block_offset;
+	bps = m_rt->bus->params.col - 1;
+	sample_int = m_rt->bus->params.col;
+
+	list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
+		list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
+			sdw_fill_xport_params(&p_rt->transport_params,
+					      p_rt->num, false,
+					      SDW_BLK_GRP_CNT_1,
+					      sample_int, port_bo, port_bo >> 8,
+					      t_data->hstart,
+					      t_data->hstop,
+					      SDW_BLK_PKG_PER_PORT, 0x0);
+
+			sdw_fill_port_params(&p_rt->port_params,
+					     p_rt->num, bps,
+					     SDW_PORT_FLOW_MODE_ISOCH,
+					     SDW_PORT_DATA_MODE_NORMAL);
+		}
+	}
+}
+
+static void sdw_compute_dp0_master_ports(struct sdw_master_runtime *m_rt)
+{
+	struct sdw_transport_data t_data = {0};
+	struct sdw_port_runtime *p_rt;
+	struct sdw_bus *bus = m_rt->bus;
+	unsigned int bps;
+	int sample_int;
+	int port_bo;
+	int hstart;
+	int hstop;
+
+	bps = bus->params.col - 1;
+	sample_int = bus->params.col;
+	hstart = 1;
+	hstop = bus->params.col - 1;
+	port_bo = 0;
+
+	t_data.hstart = hstart;
+	t_data.hstop = hstop;
+	t_data.block_offset = port_bo;
+	t_data.sub_block_offset = 0;
+
+	list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
+		sdw_fill_xport_params(&p_rt->transport_params, p_rt->num,
+				      false, SDW_BLK_GRP_CNT_1, sample_int,
+				      port_bo, port_bo >> 8, hstart, hstop,
+				      SDW_BLK_PKG_PER_PORT, 0x0);
+
+		sdw_fill_port_params(&p_rt->port_params,
+				     p_rt->num, bps,
+				     SDW_PORT_FLOW_MODE_ISOCH,
+				     SDW_PORT_DATA_MODE_NORMAL);
+	}
+
+	sdw_compute_slave_dp0_ports(m_rt, &t_data);
+}
+
+static void sdw_compute_dp0_port_params(struct sdw_bus *bus)
+{
+	struct sdw_master_runtime *m_rt;
+
+	list_for_each_entry(m_rt, &bus->m_rt_list, bus_node)
+		sdw_compute_dp0_master_ports(m_rt);
+}
+
 static void sdw_compute_master_ports(struct sdw_master_runtime *m_rt,
 				     struct sdw_group_params *params,
 				     int port_bo, int hstop)
@@ -392,8 +468,9 @@ static int sdw_compute_bus_params(struct sdw_bus *bus)
  * sdw_compute_params: Compute bus, transport and port parameters
  *
  * @bus: SDW Bus instance
+ * @bpt_stream: boolean to conditionally use dedicated bit allocation
  */
-int sdw_compute_params(struct sdw_bus *bus)
+int sdw_compute_params(struct sdw_bus *bus, bool bpt_stream)
 {
 	int ret;
 
@@ -402,6 +479,11 @@ int sdw_compute_params(struct sdw_bus *bus)
 	if (ret < 0)
 		return ret;
 
+	if (bpt_stream) {
+		sdw_compute_dp0_port_params(bus);
+		return 0;
+	}
+
 	/* Compute transport and port params */
 	ret = sdw_compute_port_params(bus);
 	if (ret < 0) {
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 3c4d6debab1f..8dd3319e8e40 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -1060,7 +1060,7 @@ static const struct sdw_master_ops qcom_swrm_ops = {
 	.pre_bank_switch = qcom_swrm_pre_bank_switch,
 };
 
-static int qcom_swrm_compute_params(struct sdw_bus *bus)
+static int qcom_swrm_compute_params(struct sdw_bus *bus, bool bpt_stream)
 {
 	struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
 	struct sdw_master_runtime *m_rt;
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index c1e3bb897fb9..16ee58d4b7a2 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1356,6 +1356,7 @@ static void sdw_release_bus_lock(struct sdw_stream_runtime *stream)
 static int _sdw_prepare_stream(struct sdw_stream_runtime *stream,
 			       bool update_params)
 {
+	bool bpt_stream = (stream->type == SDW_STREAM_BPT) ? true : false;
 	struct sdw_master_runtime *m_rt;
 	struct sdw_bus *bus;
 	struct sdw_master_prop *prop;
@@ -1382,7 +1383,7 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream,
 
 			/* Compute params */
 			if (bus->compute_params) {
-				ret = bus->compute_params(bus);
+				ret = bus->compute_params(bus, bpt_stream);
 				if (ret < 0) {
 					dev_err(bus->dev, "Compute params failed: %d\n",
 						ret);
@@ -1640,6 +1641,7 @@ EXPORT_SYMBOL(sdw_disable_stream);
 
 static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 {
+	bool bpt_stream = (stream->type == SDW_STREAM_BPT) ? true : false;
 	struct sdw_master_runtime *m_rt;
 	struct sdw_bus *bus;
 	int ret = 0;
@@ -1660,7 +1662,7 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 
 		/* Compute params */
 		if (bus->compute_params) {
-			ret = bus->compute_params(bus);
+			ret = bus->compute_params(bus, bpt_stream);
 			if (ret < 0) {
 				dev_err(bus->dev, "Compute params failed: %d\n",
 					ret);
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 9f04f3ad044f..1dda65d91bad 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -918,7 +918,7 @@ struct sdw_bus {
 	struct lock_class_key bus_lock_key;
 	struct mutex msg_lock;
 	struct lock_class_key msg_lock_key;
-	int (*compute_params)(struct sdw_bus *bus);
+	int (*compute_params)(struct sdw_bus *bus, bool bpt_stream);
 	const struct sdw_master_ops *ops;
 	const struct sdw_master_port_ops *port_ops;
 	struct sdw_bus_params params;
@@ -1030,7 +1030,7 @@ struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name,
 					    enum sdw_stream_type type);
 void sdw_release_stream(struct sdw_stream_runtime *stream);
 
-int sdw_compute_params(struct sdw_bus *bus);
+int sdw_compute_params(struct sdw_bus *bus, bool bpt_stream);
 
 int sdw_stream_add_master(struct sdw_bus *bus,
 		struct sdw_stream_config *stream_config,
-- 
2.39.2





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