On 11/14/22 04:29, Charles Keepax wrote:
There is no need to play with the runtime reference everytime a register is accessed. All the remaining "pm" style register accesses trace back to 4 functions:
sdw_prepare_stream sdw_deprepare_stream sdw_enable_stream sdw_disable_stream
Any sensible implementation will need to hold a runtime reference across all those functions, it makes no sense to be allowing the device/bus to suspend whilst streams are being prepared/enabled. And certainly in the case of the all existing users, they all call these functions from hw_params/prepare/trigger/hw_free callbacks in ALSA, which will have already runtime resumed all the audio devices associated during the open callback.
Signed-off-by: Charles Keepax ckeepax@opensource.cirrus.com
I tend to agree with this one, and if this ever fails that would point to a miss at a higher-level we'd need to address.
Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
drivers/soundwire/bus.c | 2 +- drivers/soundwire/stream.c | 30 +++++++++++++++--------------- 2 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index ef4878258afad..d87a188fcce1e 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1214,7 +1214,7 @@ int sdw_configure_dpn_intr(struct sdw_slave *slave, val &= ~SDW_DPN_INT_PORT_READY; }
- ret = sdw_update(slave, addr, (mask | SDW_DPN_INT_PORT_READY), val);
- ret = sdw_update_no_pm(slave, addr, (mask | SDW_DPN_INT_PORT_READY), val); if (ret < 0) dev_err(&slave->dev, "SDW_DPN_INTMASK write failed:%d\n", val);
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index bd502368339e5..df3b36670df4c 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -81,14 +81,14 @@ static int _sdw_program_slave_port_params(struct sdw_bus *bus, }
/* Program DPN_OffsetCtrl2 registers */
- ret = sdw_write(slave, addr1, t_params->offset2);
ret = sdw_write_no_pm(slave, addr1, t_params->offset2); if (ret < 0) { dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed\n"); return ret; }
/* Program DPN_BlockCtrl3 register */
- ret = sdw_write(slave, addr2, t_params->blk_pkg_mode);
- ret = sdw_write_no_pm(slave, addr2, t_params->blk_pkg_mode); if (ret < 0) { dev_err(bus->dev, "DPN_BlockCtrl3 register write failed\n"); return ret;
@@ -105,7 +105,7 @@ static int _sdw_program_slave_port_params(struct sdw_bus *bus, /* Program DPN_SampleCtrl2 register */ wbuf = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1);
- ret = sdw_write(slave, addr3, wbuf);
- ret = sdw_write_no_pm(slave, addr3, wbuf); if (ret < 0) { dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n"); return ret;
@@ -115,7 +115,7 @@ static int _sdw_program_slave_port_params(struct sdw_bus *bus, wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop);
- ret = sdw_write(slave, addr4, wbuf);
- ret = sdw_write_no_pm(slave, addr4, wbuf); if (ret < 0) dev_err(bus->dev, "DPN_HCtrl register write failed\n");
@@ -163,7 +163,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus, wbuf = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode);
- ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf);
- ret = sdw_update_no_pm(s_rt->slave, addr1, 0xF, wbuf); if (ret < 0) { dev_err(&s_rt->slave->dev, "DPN_PortCtrl register write failed for port %d\n",
@@ -173,7 +173,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus,
if (!dpn_prop->read_only_wordlength) { /* Program DPN_BlockCtrl1 register */
ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1));
ret = sdw_write_no_pm(s_rt->slave, addr2, (p_params->bps - 1));@@ -184,7 +184,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus,
/* Program DPN_SampleCtrl1 register */ wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW;
- ret = sdw_write(s_rt->slave, addr3, wbuf);
- ret = sdw_write_no_pm(s_rt->slave, addr3, wbuf); if (ret < 0) { dev_err(&s_rt->slave->dev, "DPN_SampleCtrl1 register write failed for port %d\n",
@@ -193,7 +193,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus, }
/* Program DPN_OffsetCtrl1 registers */
- ret = sdw_write(s_rt->slave, addr4, t_params->offset1);
- ret = sdw_write_no_pm(s_rt->slave, addr4, t_params->offset1); if (ret < 0) { dev_err(&s_rt->slave->dev, "DPN_OffsetCtrl1 register write failed for port %d\n",
@@ -203,7 +203,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus,
/* Program DPN_BlockCtrl2 register*/ if (t_params->blk_grp_ctrl_valid) {
ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl);
ret = sdw_write_no_pm(s_rt->slave, addr5, t_params->blk_grp_ctrl);@@ -214,7 +214,7 @@ static int sdw_program_slave_port_params(struct sdw_bus *bus,
/* program DPN_LaneCtrl register */ if (slave_prop->lane_control_support) {
ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl);
ret = sdw_write_no_pm(s_rt->slave, addr6, t_params->lane_ctrl);@@ -319,9 +319,9 @@ static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, * it is safe to reset this register */ if (en)
ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask);
ret = sdw_write_no_pm(s_rt->slave, addr, p_rt->ch_mask);
ret = sdw_write(s_rt->slave, addr, 0x0);
ret = sdw_write_no_pm(s_rt->slave, addr, 0x0);if (ret < 0) dev_err(&s_rt->slave->dev,
@@ -476,9 +476,9 @@ static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, addr = SDW_DPN_PREPARECTRL(p_rt->num);
if (prep)
ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask);
ret = sdw_write_no_pm(s_rt->slave, addr, p_rt->ch_mask);
ret = sdw_write(s_rt->slave, addr, 0x0);
ret = sdw_write_no_pm(s_rt->slave, addr, 0x0);if (ret < 0) { dev_err(&s_rt->slave->dev,
@@ -491,7 +491,7 @@ static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, wait_for_completion_timeout(port_ready, msecs_to_jiffies(dpn_prop->ch_prep_timeout));
val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num));
val = sdw_read_no_pm(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num));