diff mbox series

[RFC,06/16] soundwire: stream: reuse existing code for BPT stream

Message ID 20231207222944.663893-7-pierre-louis.bossart@linux.intel.com
State New
Headers show
Series soundwire/ASoC: speed-up downloads with BTP/BRA protocol | expand

Commit Message

Pierre-Louis Bossart Dec. 7, 2023, 10:29 p.m. UTC 
DP0 (Data Port 0) is very similar to regular data ports, with minor
tweaks we can reuse the same code.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 drivers/soundwire/stream.c | 94 +++++++++++++++++++++++++++-----------
 1 file changed, 68 insertions(+), 26 deletions(-)

Comments

Pierre-Louis Bossart Dec. 18, 2023, 10:45 a.m. UTC | #1 
On 12/12/23 06:30, Charles Keepax wrote:
> On Thu, Dec 07, 2023 at 04:29:34PM -0600, Pierre-Louis Bossart wrote:
>> DP0 (Data Port 0) is very similar to regular data ports, with minor
>> tweaks we can reuse the same code.
>>
>> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
>> ---
>> -	dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
>> -					  s_rt->direction,
>> -					  t_params->port_num);
>> -	if (!dpn_prop)
>> -		return -EINVAL;
>> +	if (t_params->port_num) {
>> +		struct sdw_dpn_prop *dpn_prop;
>> +
>> +		dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
>> +						  s_rt->direction,
>> +						  t_params->port_num);
>> +		if (!dpn_prop)
>> +			return -EINVAL;
>> +
>> +		read_only_wordlength = dpn_prop->read_only_wordlength;
>> +		port_type = dpn_prop->type;
>> +	} else {
>> +		read_only_wordlength = false;
>> +		port_type = SDW_DPN_FULL;
>> +	}
> 
> Would it be nicer to just add a special case sdw_get_slave_dpn_prop
> to return dp0_prop and avoid all this special casing in the rest
> of the code?

There are multiple cases in the same function where we need to check for
DP0. We could move the read_only_wordlength and port_type to the
sdw_get_slave_dpn_prop() helper, but then we would spread the special
cases in multiple locations. It's not pretty either way.
diff mbox series

Patch

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 16ee58d4b7a2..f9762610f051 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -87,6 +87,10 @@  static int _sdw_program_slave_port_params(struct sdw_bus *bus,
 		return ret;
 	}
 
+	/* DP0 does not implement BlockCtrl3 */
+	if (!t_params->port_num)
+		goto skip_block_ctrl3;
+
 	/* Program DPN_BlockCtrl3 register */
 	ret = sdw_write_no_pm(slave, addr2, t_params->blk_pkg_mode);
 	if (ret < 0) {
@@ -94,6 +98,7 @@  static int _sdw_program_slave_port_params(struct sdw_bus *bus,
 		return ret;
 	}
 
+skip_block_ctrl3:
 	/*
 	 * Data ports are FULL, SIMPLE and REDUCED. This function handles
 	 * FULL and REDUCED only and beyond this point only FULL is
@@ -130,18 +135,29 @@  static int sdw_program_slave_port_params(struct sdw_bus *bus,
 	struct sdw_port_params *p_params = &p_rt->port_params;
 	struct sdw_slave_prop *slave_prop = &s_rt->slave->prop;
 	u32 addr1, addr2, addr3, addr4, addr5, addr6;
-	struct sdw_dpn_prop *dpn_prop;
+	enum sdw_dpn_type port_type;
+	bool read_only_wordlength;
 	int ret;
 	u8 wbuf;
 
 	if (s_rt->slave->is_mockup_device)
 		return 0;
 
-	dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
-					  s_rt->direction,
-					  t_params->port_num);
-	if (!dpn_prop)
-		return -EINVAL;
+	if (t_params->port_num) {
+		struct sdw_dpn_prop *dpn_prop;
+
+		dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
+						  s_rt->direction,
+						  t_params->port_num);
+		if (!dpn_prop)
+			return -EINVAL;
+
+		read_only_wordlength = dpn_prop->read_only_wordlength;
+		port_type = dpn_prop->type;
+	} else {
+		read_only_wordlength = false;
+		port_type = SDW_DPN_FULL;
+	}
 
 	addr1 = SDW_DPN_PORTCTRL(t_params->port_num);
 	addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num);
@@ -171,7 +187,7 @@  static int sdw_program_slave_port_params(struct sdw_bus *bus,
 		return ret;
 	}
 
-	if (!dpn_prop->read_only_wordlength) {
+	if (!read_only_wordlength) {
 		/* Program DPN_BlockCtrl1 register */
 		ret = sdw_write_no_pm(s_rt->slave, addr2, (p_params->bps - 1));
 		if (ret < 0) {
@@ -223,9 +239,9 @@  static int sdw_program_slave_port_params(struct sdw_bus *bus,
 		}
 	}
 
-	if (dpn_prop->type != SDW_DPN_SIMPLE) {
+	if (port_type != SDW_DPN_SIMPLE) {
 		ret = _sdw_program_slave_port_params(bus, s_rt->slave,
-						     t_params, dpn_prop->type);
+						     t_params, port_type);
 		if (ret < 0)
 			dev_err(&s_rt->slave->dev,
 				"Transport reg write failed for port: %d\n",
@@ -432,6 +448,9 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	struct completion *port_ready;
 	struct sdw_dpn_prop *dpn_prop;
 	struct sdw_prepare_ch prep_ch;
+	u32 imp_def_interrupts;
+	bool simple_ch_prep_sm;
+	u32 ch_prep_timeout;
 	bool intr = false;
 	int ret = 0, val;
 	u32 addr;
@@ -439,20 +458,31 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	prep_ch.num = p_rt->num;
 	prep_ch.ch_mask = p_rt->ch_mask;
 
-	dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
-					  s_rt->direction,
-					  prep_ch.num);
-	if (!dpn_prop) {
-		dev_err(bus->dev,
-			"Slave Port:%d properties not found\n", prep_ch.num);
-		return -EINVAL;
+	if (p_rt->num) {
+		dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
+						  s_rt->direction,
+						  prep_ch.num);
+		if (!dpn_prop) {
+			dev_err(bus->dev,
+				"Slave Port:%d properties not found\n", prep_ch.num);
+			return -EINVAL;
+		}
+
+		imp_def_interrupts = dpn_prop->imp_def_interrupts;
+		simple_ch_prep_sm = dpn_prop->simple_ch_prep_sm;
+	} else {
+		struct sdw_dp0_prop *dp0_prop = s_rt->slave->prop.dp0_prop;
+
+		imp_def_interrupts = dp0_prop->imp_def_interrupts;
+		simple_ch_prep_sm =  dp0_prop->simple_ch_prep_sm;
+		ch_prep_timeout = dp0_prop->ch_prep_timeout;
 	}
 
 	prep_ch.prepare = prep;
 
 	prep_ch.bank = bus->params.next_bank;
 
-	if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm ||
+	if (imp_def_interrupts || !simple_ch_prep_sm ||
 	    bus->params.s_data_mode != SDW_PORT_DATA_MODE_NORMAL)
 		intr = true;
 
@@ -463,7 +493,7 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	 */
 	if (prep && intr) {
 		ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep,
-					     dpn_prop->imp_def_interrupts);
+					     imp_def_interrupts);
 		if (ret < 0)
 			return ret;
 	}
@@ -472,7 +502,7 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	sdw_do_port_prep(s_rt, prep_ch, prep ? SDW_OPS_PORT_PRE_PREP : SDW_OPS_PORT_PRE_DEPREP);
 
 	/* Prepare Slave port implementing CP_SM */
-	if (!dpn_prop->simple_ch_prep_sm) {
+	if (!simple_ch_prep_sm) {
 		addr = SDW_DPN_PREPARECTRL(p_rt->num);
 
 		if (prep)
@@ -489,7 +519,7 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 		/* Wait for completion on port ready */
 		port_ready = &s_rt->slave->port_ready[prep_ch.num];
 		wait_for_completion_timeout(port_ready,
-			msecs_to_jiffies(dpn_prop->ch_prep_timeout));
+			msecs_to_jiffies(ch_prep_timeout));
 
 		val = sdw_read_no_pm(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num));
 		if ((val < 0) || (val & p_rt->ch_mask)) {
@@ -506,7 +536,7 @@  static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus,
 	/* Disable interrupt after Port de-prepare */
 	if (!prep && intr)
 		ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep,
-					     dpn_prop->imp_def_interrupts);
+					     imp_def_interrupts);
 
 	return ret;
 }
@@ -970,7 +1000,8 @@  static int sdw_slave_port_is_valid_range(struct device *dev, int num)
 
 static int sdw_slave_port_config(struct sdw_slave *slave,
 				 struct sdw_slave_runtime *s_rt,
-				 const struct sdw_port_config *port_config)
+				 const struct sdw_port_config *port_config,
+				 bool is_bpt_stream)
 {
 	struct sdw_port_runtime *p_rt;
 	int ret;
@@ -982,9 +1013,14 @@  static int sdw_slave_port_config(struct sdw_slave *slave,
 		 * TODO: Check valid port range as defined by DisCo/
 		 * slave
 		 */
-		ret = sdw_slave_port_is_valid_range(&slave->dev, port_config[i].num);
-		if (ret < 0)
-			return ret;
+		if (!is_bpt_stream) {
+			ret = sdw_slave_port_is_valid_range(&slave->dev, port_config[i].num);
+			if (ret < 0)
+				return ret;
+		} else {
+			if (port_config[i].num)
+				return -EINVAL;
+		}
 
 		ret = sdw_port_config(p_rt, port_config, i);
 		if (ret < 0)
@@ -1293,6 +1329,11 @@  struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
 	u8 num_ports;
 	int i;
 
+	if (!port_num) {
+		dev_err(&slave->dev, "%s: port_num is zero\n", __func__);
+		return NULL;
+	}
+
 	if (direction == SDW_DATA_DIR_TX) {
 		num_ports = hweight32(slave->prop.source_ports);
 		dpn_prop = slave->prop.src_dpn_prop;
@@ -2056,7 +2097,8 @@  int sdw_stream_add_slave(struct sdw_slave *slave,
 	if (ret)
 		goto unlock;
 
-	ret = sdw_slave_port_config(slave, s_rt, port_config);
+	ret = sdw_slave_port_config(slave, s_rt, port_config,
+				    stream->type == SDW_STREAM_BPT ? true : false);
 	if (ret)
 		goto unlock;