On 4/5/18 11:48 AM, Vinod Koul wrote:
From: Sanyog Kale <sanyog.r.kale@xxxxxxxxx>
Add Soundwire port data structures and APIS for initialization
and release of ports.
Signed-off-by: Sanyog Kale <sanyog.r.kale@xxxxxxxxx>
Signed-off-by: Shreyas NC <shreyas.nc@xxxxxxxxx>
Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
---
drivers/soundwire/bus.h | 25 +++++++
drivers/soundwire/stream.c | 151 +++++++++++++++++++++++++++++++++++++++++-
include/linux/soundwire/sdw.h | 67 +++++++++++++++++++
3 files changed, 241 insertions(+), 2 deletions(-)
diff --git a/drivers/soundwire/bus.h b/drivers/soundwire/bus.h
index 3c66b6aecc14..2e834a8038ed 100644
--- a/drivers/soundwire/bus.h
+++ b/drivers/soundwire/bus.h
@@ -46,6 +46,27 @@ struct sdw_msg {
};
/**
+ * sdw_port_runtime: Runtime port parameters for Master or Slave
+ *
+ * @num: Port number. For audio streams, valid port number ranges from
+ * [1,14]
+ * @ch_mask: Channel mask
+ * @transport_params: Transport parameters
+ * @port_params: Port parameters
+ * @port_node: List node for Master or Slave port_list
+ *
+ * SoundWire spec has no mention of ports for Master interface but the
+ * concept is logically extended.
+ */
+struct sdw_port_runtime {
+ int num;
+ int ch_mask;
+ struct sdw_transport_params transport_params;
+ struct sdw_port_params port_params;
+ struct list_head port_node;
+};
+
+/**
* sdw_slave_runtime: Runtime Stream parameters for Slave
*
* @slave: Slave handle
@@ -53,12 +74,14 @@ struct sdw_msg {
* @ch_count: Number of channels handled by the Slave for
* this stream
* @m_rt_node: sdw_master_runtime list node
+ * @port_list: List of Slave Ports configured for this stream
*/
struct sdw_slave_runtime {
struct sdw_slave *slave;
enum sdw_data_direction direction;
unsigned int ch_count;
struct list_head m_rt_node;
+ struct list_head port_list;
};
/**
@@ -70,6 +93,7 @@ struct sdw_slave_runtime {
* @ch_count: Number of channels handled by the Master for
* this stream
* @slave_rt_list: Slave runtime list
+ * @port_list: List of Master Ports configured for this stream
possibly empty for device to device communication.
* @bus_node: sdw_bus m_rt_list node
*/
struct sdw_master_runtime {
@@ -78,6 +102,7 @@ struct sdw_master_runtime {
enum sdw_data_direction direction;
unsigned int ch_count;
struct list_head slave_rt_list;
+ struct list_head port_list;
struct list_head bus_node;
};
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 5c34177e4954..4b10f07b3e9e 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -75,6 +75,7 @@ static struct sdw_master_runtime
return NULL;
/* Initialization of Master runtime handle */
+ INIT_LIST_HEAD(&m_rt->port_list);
INIT_LIST_HEAD(&m_rt->slave_rt_list);
stream->m_rt = m_rt;
@@ -109,6 +110,7 @@ static struct sdw_slave_runtime
if (!s_rt)
return NULL;
+ INIT_LIST_HEAD(&s_rt->port_list);
s_rt->ch_count = stream_config->ch_count;
s_rt->direction = stream_config->direction;
@@ -117,6 +119,41 @@ static struct sdw_slave_runtime
return s_rt;
}
+static void sdw_master_port_deconfig(struct sdw_bus *bus,
+ struct sdw_master_runtime *m_rt)
+{
+ struct sdw_port_runtime *p_rt, *_p_rt;
+
+ list_for_each_entry_safe(p_rt, _p_rt,
+ &m_rt->port_list, port_node) {
+
+ list_del(&p_rt->port_node);
+ kfree(p_rt);
+ }
+}
I still don't get the naming conventions. There is no DECONFIGURED
state, why not call it release? In which state is this called?
+
+static void sdw_slave_port_deconfig(struct sdw_bus *bus,
+ struct sdw_slave *slave,
+ struct sdw_stream_runtime *stream)
+{
+ struct sdw_port_runtime *p_rt, *_p_rt;
+ struct sdw_master_runtime *m_rt = stream->m_rt;
+ struct sdw_slave_runtime *s_rt;
+
+ list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
+
+ if (s_rt->slave != slave)
+ continue;
+
+ list_for_each_entry_safe(p_rt, _p_rt,
+ &s_rt->port_list, port_node) {
+
+ list_del(&p_rt->port_node);
+ kfree(p_rt);
+ }
can we use common code between master and slaves? This looks virtually
identical.
+ }
+}
+
/**
* sdw_release_slave_stream: Free Slave(s) runtime handle
*
@@ -161,7 +198,7 @@ static void sdw_release_master_stream(struct sdw_stream_runtime *stream)
* @bus: SDW Bus instance
* @stream: Soundwire stream
*
- * This removes and frees master_rt from a stream
+ * This removes and frees port_rt and master_rt from a stream
*/
int sdw_stream_remove_master(struct sdw_bus *bus,
struct sdw_stream_runtime *stream)
@@ -169,6 +206,7 @@ int sdw_stream_remove_master(struct sdw_bus *bus,
mutex_lock(&bus->bus_lock);
sdw_release_master_stream(stream);
+ sdw_master_port_deconfig(bus, stream->m_rt);
stream->state = SDW_STREAM_RELEASED;
kfree(stream->m_rt);
stream->m_rt = NULL;
@@ -185,13 +223,14 @@ EXPORT_SYMBOL(sdw_stream_remove_master);
* @slave: SDW Slave instance
* @stream: Soundwire stream
*
- * This removes and frees slave_rt from a stream
+ * This removes and frees port_rt and slave_rt from a stream
*/
int sdw_stream_remove_slave(struct sdw_slave *slave,
struct sdw_stream_runtime *stream)
{
mutex_lock(&slave->bus->bus_lock);
+ sdw_slave_port_deconfig(slave->bus, slave, stream);
then call it sdw_slave_port_release as I mentioned above...
sdw_release_slave_stream(slave, stream);
mutex_unlock(&slave->bus->bus_lock);
@@ -241,15 +280,111 @@ static int sdw_config_stream(struct device *dev,
return 0;
}
+static int sdw_is_valid_port_range(struct device *dev,
+ struct sdw_port_runtime *p_rt)
+{
+ if (!SDW_VALID_PORT_RANGE(p_rt->num)) {
+ dev_err(dev,
+ "SoundWire: Invalid port number :%d", p_rt->num);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct sdw_port_runtime *sdw_port_alloc(struct device *dev,
+ struct sdw_port_config *port_config,
+ int port_index)
+{
+ struct sdw_port_runtime *p_rt;
+
+ p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL);
+ if (!p_rt)
+ return NULL;
+
+ p_rt->ch_mask = port_config[port_index].ch_mask;
+ p_rt->num = port_config[port_index].num;
+
+ return p_rt;
+}
+
+static int sdw_master_port_config(struct sdw_bus *bus,
+ struct sdw_master_runtime *m_rt,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports)
+{
+ struct sdw_port_runtime *p_rt;
+ int i, ret;
+
+ /* Iterate for number of ports to perform initialization */
+ for (i = 0; i < num_ports; i++) {
+
+ p_rt = sdw_port_alloc(bus->dev, port_config, i);
+ if (!p_rt)
+ return -ENOMEM; > +
+ ret = sdw_is_valid_port_range(bus->dev, p_rt);
a master has no definition of ports. You could have more than 14 ports.
Even if you have a description of those ports, it has to be checking not
for the standard definition but what the hardware can support
+ if (ret < 0) {
+ kfree(p_rt);
+ return ret;
+ }
+
+ /*
+ * TODO: Check port capabilities for requested
+ * configuration (audio mode support)
+ */
+
+ list_add_tail(&p_rt->port_node, &m_rt->port_list);
+ }
+
+ return 0;
+}
+
+static int sdw_slave_port_config(struct sdw_slave *slave,
+ struct sdw_slave_runtime *s_rt,
+ struct sdw_port_config *port_config,
+ unsigned int num_config)
+{
+ struct sdw_port_runtime *p_rt;
+ int i, ret;
+
+ /* Iterate for number of ports to perform initialization */
+ for (i = 0; i < num_config; i++) {
+
+ p_rt = sdw_port_alloc(&slave->dev, port_config, i);
+ if (!p_rt)
+ return -ENOMEM;
+
+ ret = sdw_is_valid_port_range(&slave->dev, p_rt);
this is optimistic. You should check the actual port range (as defined
in DisCo properties or driver), not just the worst case allowed by the
standard.
This should include a check that the bi-dir ports are configured for the
right role and that the direction is compatible for regular
fixed-direction ports.
+ if (ret < 0) {
+ kfree(p_rt);
+ return ret;
+ }
+
+ /*
+ * TODO: Check port capabilities for requested
+ * configuration (audio mode support)
+ */
+
+ list_add_tail(&p_rt->port_node, &s_rt->port_list);
+ }
+
+ return 0;
+}
+
/**
* sdw_stream_add_master: Allocate and add master runtime to a stream
*
* @bus: SDW Bus instance
* @stream_config: Stream configuration for audio stream
+ * @port_config: Port configuration for audio stream
+ * @num_ports: Number of ports
* @stream: Soundwire stream
*/
int sdw_stream_add_master(struct sdw_bus *bus,
struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
struct sdw_stream_runtime *stream)
{
struct sdw_master_runtime *m_rt = NULL;
@@ -277,6 +412,10 @@ int sdw_stream_add_master(struct sdw_bus *bus,
if (ret)
goto stream_error;
+ ret = sdw_master_port_config(bus, m_rt, port_config, num_ports);
+ if (ret)
+ goto stream_error;
+
if (!list_empty(&m_rt->slave_rt_list) &&
stream->state == SDW_STREAM_ALLOCATED)
stream->state = SDW_STREAM_CONFIGURED;
@@ -295,10 +434,14 @@ EXPORT_SYMBOL(sdw_stream_add_master);
*
* @slave: SDW Slave instance
* @stream_config: Stream configuration for audio stream
+ * @port_config: Port configuration for audio stream
+ * @num_ports: Number of ports
* @stream: Soundwire stream
*/
int sdw_stream_add_slave(struct sdw_slave *slave,
struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
struct sdw_stream_runtime *stream)
{
struct sdw_slave_runtime *s_rt;
@@ -342,6 +485,10 @@ int sdw_stream_add_slave(struct sdw_slave *slave,
list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list);
+ ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports);
+ if (ret)
+ goto stream_error;
+
stream->state = SDW_STREAM_CONFIGURED;
goto error;
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 893e1b6b4914..228fdbf506fe 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -26,6 +26,8 @@ struct sdw_slave;
#define SDW_MAX_DEVICES 11
+#define SDW_VALID_PORT_RANGE(n) (n <= 14 && n >= 1)
+
/**
* enum sdw_slave_status - Slave status
* @SDW_SLAVE_UNATTACHED: Slave is not attached with the bus.
@@ -430,6 +432,56 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
* SDW master structures and APIs
*/
+/**
+ * struct sdw_port_params: Data Port parameters
+ *
+ * @num: Port number
+ * @bps: Word length of the Port
+ * @flow_mode: Port Data flow mode
+ * @data_mode: Test modes or normal mode
+ *
+ * This is used to program the Data Port based on Data Port stream
+ * parameters.
+ */
+struct sdw_port_params {
+ unsigned int num;
+ unsigned int bps;
+ unsigned int flow_mode;
+ unsigned int data_mode;
+};
+
+/**
+ * struct sdw_transport_params: Data Port Transport Parameters
+ *
+ * @blk_grp_ctrl_valid: Port implements block group control
+ * @num: Port number
+ * @blk_grp_ctrl: Block group control value
+ * @sample_interval: Sample interval
+ * @offset1: Blockoffset of the payload data
+ * @offset2: Blockoffset of the payload data
+ * @hstart: Horizontal start of the payload data
+ * @hstop: Horizontal stop of the payload data
+ * @blk_pkg_mode: Block per channel or block per port
+ * @lane_ctrl: Data lane Port uses for Data transfer. Currently only single
+ * data lane is supported in bus
+ *
+ * This is used to program the Data Port based on Data Port transport
+ * parameters. All these parameters are banked and can be modified
+ * during a bank switch without any artifacts in audio stream.
+ */
+struct sdw_transport_params {
+ bool blk_grp_ctrl_valid;
+ unsigned int port_num;
+ unsigned int blk_grp_ctrl;
+ unsigned int sample_interval;
+ unsigned int offset1;
+ unsigned int offset2;
+ unsigned int hstart;
+ unsigned int hstop;
+ unsigned int blk_pkg_mode;
+ unsigned int lane_ctrl;
+};
+
struct sdw_msg;
/**
@@ -498,6 +550,17 @@ int sdw_add_bus_master(struct sdw_bus *bus);
void sdw_delete_bus_master(struct sdw_bus *bus);
/**
+ * sdw_port_config: Master or Slave Port configuration
+ *
+ * @num: Port number
+ * @ch_mask: channels mask for port
+ */
+struct sdw_port_config {
+ unsigned int num;
+ unsigned int ch_mask;
+};
+
+/**
* sdw_stream_config: Master or Slave stream configuration
*
* @frame_rate: Audio frame rate of the stream, in Hz
@@ -569,9 +632,13 @@ struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name);
void sdw_release_stream(struct sdw_stream_runtime *stream);
int sdw_stream_add_master(struct sdw_bus *bus,
struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
struct sdw_stream_runtime *stream);
int sdw_stream_add_slave(struct sdw_slave *slave,
struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
struct sdw_stream_runtime *stream);
int sdw_stream_remove_master(struct sdw_bus *bus,
struct sdw_stream_runtime *stream);
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