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[PATCH AUTOSEL 6.6 34/58] soundwire: cadence: re-check Peripheral status with delayed_work
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit f8c35d61ba01afa76846905c67862cdace7f66b0 ] The SoundWire peripheral enumeration is entirely based on interrupts, more specifically sticky bits tracking state changes. This patch adds a defensive programming check on the actual status reported in PING frames. If for some reason an interrupt was lost or delayed, the delayed work would detect a peripheral change of status after the bus starts. The 100ms defined for the delay is not completely arbitrary, if a Peripheral didn't join the bus within that delay then probably the hardware link is broken, and conversely if the detection didn't happen because of software issues the 100ms is still acceptable in terms of user experience. The overhead of the one-shot workqueue is minimal, and the mutual exclusion ensures that the interrupt and delayed work cannot update the status concurrently. Reviewed-by: Liam Girdwood <liam.r.girdwood(a)intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805114921.88007-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/cadence_master.c | 39 ++++++++++++++++++++++++++-- drivers/soundwire/cadence_master.h | 5 ++++ drivers/soundwire/intel.h | 2 ++ drivers/soundwire/intel_auxdevice.c | 1 + drivers/soundwire/intel_bus_common.c | 11 ++++++++ 5 files changed, 56 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 3e7cf04aaf2a6..e69982dbd449b 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -891,8 +891,14 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns, } } - if (is_slave) - return sdw_handle_slave_status(&cdns->bus, status); + if (is_slave) { + int ret; + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + return ret; + } return 0; } @@ -989,6 +995,31 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) } EXPORT_SYMBOL(sdw_cdns_irq); +static void cdns_check_attached_status_dwork(struct work_struct *work) +{ + struct sdw_cdns *cdns = + container_of(work, struct sdw_cdns, attach_dwork.work); + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; + u32 val; + int ret; + int i; + + val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT); + + for (i = 0; i <= SDW_MAX_DEVICES; i++) { + status[i] = val & 0x3; + if (status[i]) + dev_dbg(cdns->dev, "Peripheral %d status: %d\n", i, status[i]); + val >>= 2; + } + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + if (ret < 0) + dev_err(cdns->dev, "%s: sdw_handle_slave_status failed: %d\n", __func__, ret); +} + /** * cdns_update_slave_status_work - update slave status in a work since we will need to handle * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave @@ -1745,7 +1776,11 @@ int sdw_cdns_probe(struct sdw_cdns *cdns) init_completion(&cdns->tx_complete); cdns->bus.port_ops = &cdns_port_ops; + mutex_init(&cdns->status_update_lock); + INIT_WORK(&cdns->work, cdns_update_slave_status_work); + INIT_DELAYED_WORK(&cdns->attach_dwork, cdns_check_attached_status_dwork); + return 0; } EXPORT_SYMBOL(sdw_cdns_probe); diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index bc84435e420f5..e1d7969ba48ae 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -117,6 +117,8 @@ struct sdw_cdns_dai_runtime { * @link_up: Link status * @msg_count: Messages sent on bus * @dai_runtime_array: runtime context for each allocated DAI. + * @status_update_lock: protect concurrency between interrupt-based and delayed work + * status update */ struct sdw_cdns { struct device *dev; @@ -148,10 +150,13 @@ struct sdw_cdns { bool interrupt_enabled; struct work_struct work; + struct delayed_work attach_dwork; struct list_head list; struct sdw_cdns_dai_runtime **dai_runtime_array; + + struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */ }; #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus) diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h index 511932c55216c..bb6b1df2d2c20 100644 --- a/drivers/soundwire/intel.h +++ b/drivers/soundwire/intel.h @@ -91,6 +91,8 @@ static inline void intel_writew(void __iomem *base, int offset, u16 value) #define INTEL_MASTER_RESET_ITERATIONS 10 +#define SDW_INTEL_DELAYED_ENUMERATION_MS 100 + #define SDW_INTEL_CHECK_OPS(sdw, cb) ((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \ (sdw)->link_res->hw_ops->cb) #define SDW_INTEL_OPS(sdw, cb) ((sdw)->link_res->hw_ops->cb) diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c index 93698532deac4..bdfff78ac2f81 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -398,6 +398,7 @@ static void intel_link_remove(struct auxiliary_device *auxdev) */ if (!bus->prop.hw_disabled) { sdw_intel_debugfs_exit(sdw); + cancel_delayed_work_sync(&cdns->attach_dwork); sdw_cdns_enable_interrupt(cdns, false); } sdw_bus_master_delete(bus); diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index 179aa0d85951b..db9cf211671a3 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -60,6 +60,9 @@ int intel_start_bus(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -151,6 +154,9 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) } sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -184,6 +190,9 @@ int intel_start_bus_after_clock_stop(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -194,6 +203,8 @@ int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop) bool wake_enable = false; int ret; + cancel_delayed_work_sync(&cdns->attach_dwork); + if (clock_stop) { ret = sdw_cdns_clock_stop(cdns, true); if (ret < 0) -- 2.43.0

1 0

[PATCH AUTOSEL 6.6 20/58] soundwire: intel_bus_common: enable interrupts before exiting reset
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit 5aedb8d8336b0a0421b58ca27d1b572aa6695b5b ] The existing code enables the Cadence IP interrupts after the bus reset sequence. The problem with this sequence is that it might be pre-empted, giving SoundWire devices time to sync and report as ATTACHED before the interrupts are enabled. In that case, the Cadence IP will not detect a state change and will not throw an interrupt to proceed with the enumeration of a Device0. In our overnight stress tests, we observed that a slight sub-millisecond delay in enabling interrupts after the reset was correlated with detection failures. This problem is more prevalent on the LunarLake silicon, likely due to SOC integration changes, but it was observed on earlier generations as well. This patch reverts the sequence, with the interrupts enabled before performing the bus reset. This removes the race condition and makes sure the Cadence IP is able to detect the presence of a Device0 in all cases. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805115003.88035-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/intel_bus_common.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index e5ac3cc7cb79b..179aa0d85951b 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -45,15 +45,15 @@ int intel_start_bus(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); + dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); + dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); return ret; } @@ -136,15 +136,15 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "unable to exit bus reset sequence during resume\n"); + dev_err(dev, "cannot enable interrupts during resume\n"); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "cannot enable interrupts during resume\n"); + dev_err(dev, "unable to exit bus reset sequence during resume\n"); return ret; } -- 2.43.0

1 0

[PATCH AUTOSEL 6.10 39/70] soundwire: cadence: re-check Peripheral status with delayed_work
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit f8c35d61ba01afa76846905c67862cdace7f66b0 ] The SoundWire peripheral enumeration is entirely based on interrupts, more specifically sticky bits tracking state changes. This patch adds a defensive programming check on the actual status reported in PING frames. If for some reason an interrupt was lost or delayed, the delayed work would detect a peripheral change of status after the bus starts. The 100ms defined for the delay is not completely arbitrary, if a Peripheral didn't join the bus within that delay then probably the hardware link is broken, and conversely if the detection didn't happen because of software issues the 100ms is still acceptable in terms of user experience. The overhead of the one-shot workqueue is minimal, and the mutual exclusion ensures that the interrupt and delayed work cannot update the status concurrently. Reviewed-by: Liam Girdwood <liam.r.girdwood(a)intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805114921.88007-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/cadence_master.c | 39 ++++++++++++++++++++++++++-- drivers/soundwire/cadence_master.h | 5 ++++ drivers/soundwire/intel.h | 2 ++ drivers/soundwire/intel_auxdevice.c | 1 + drivers/soundwire/intel_bus_common.c | 11 ++++++++ 5 files changed, 56 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 74da99034dab5..ec08e26cef829 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -891,8 +891,14 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns, } } - if (is_slave) - return sdw_handle_slave_status(&cdns->bus, status); + if (is_slave) { + int ret; + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + return ret; + } return 0; } @@ -989,6 +995,31 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) } EXPORT_SYMBOL(sdw_cdns_irq); +static void cdns_check_attached_status_dwork(struct work_struct *work) +{ + struct sdw_cdns *cdns = + container_of(work, struct sdw_cdns, attach_dwork.work); + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; + u32 val; + int ret; + int i; + + val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT); + + for (i = 0; i <= SDW_MAX_DEVICES; i++) { + status[i] = val & 0x3; + if (status[i]) + dev_dbg(cdns->dev, "Peripheral %d status: %d\n", i, status[i]); + val >>= 2; + } + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + if (ret < 0) + dev_err(cdns->dev, "%s: sdw_handle_slave_status failed: %d\n", __func__, ret); +} + /** * cdns_update_slave_status_work - update slave status in a work since we will need to handle * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave @@ -1741,7 +1772,11 @@ int sdw_cdns_probe(struct sdw_cdns *cdns) init_completion(&cdns->tx_complete); cdns->bus.port_ops = &cdns_port_ops; + mutex_init(&cdns->status_update_lock); + INIT_WORK(&cdns->work, cdns_update_slave_status_work); + INIT_DELAYED_WORK(&cdns->attach_dwork, cdns_check_attached_status_dwork); + return 0; } EXPORT_SYMBOL(sdw_cdns_probe); diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index bc84435e420f5..e1d7969ba48ae 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -117,6 +117,8 @@ struct sdw_cdns_dai_runtime { * @link_up: Link status * @msg_count: Messages sent on bus * @dai_runtime_array: runtime context for each allocated DAI. + * @status_update_lock: protect concurrency between interrupt-based and delayed work + * status update */ struct sdw_cdns { struct device *dev; @@ -148,10 +150,13 @@ struct sdw_cdns { bool interrupt_enabled; struct work_struct work; + struct delayed_work attach_dwork; struct list_head list; struct sdw_cdns_dai_runtime **dai_runtime_array; + + struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */ }; #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus) diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h index b68e74c294e70..c502dfdfe8abf 100644 --- a/drivers/soundwire/intel.h +++ b/drivers/soundwire/intel.h @@ -98,6 +98,8 @@ static inline void intel_writew(void __iomem *base, int offset, u16 value) #define INTEL_MASTER_RESET_ITERATIONS 10 +#define SDW_INTEL_DELAYED_ENUMERATION_MS 100 + #define SDW_INTEL_CHECK_OPS(sdw, cb) ((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \ (sdw)->link_res->hw_ops->cb) #define SDW_INTEL_OPS(sdw, cb) ((sdw)->link_res->hw_ops->cb) diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c index 18517121cc898..58f6b4f33cabd 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -433,6 +433,7 @@ static void intel_link_remove(struct auxiliary_device *auxdev) */ if (!bus->prop.hw_disabled) { sdw_intel_debugfs_exit(sdw); + cancel_delayed_work_sync(&cdns->attach_dwork); sdw_cdns_enable_interrupt(cdns, false); } sdw_bus_master_delete(bus); diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index 179aa0d85951b..db9cf211671a3 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -60,6 +60,9 @@ int intel_start_bus(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -151,6 +154,9 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) } sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -184,6 +190,9 @@ int intel_start_bus_after_clock_stop(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -194,6 +203,8 @@ int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop) bool wake_enable = false; int ret; + cancel_delayed_work_sync(&cdns->attach_dwork); + if (clock_stop) { ret = sdw_cdns_clock_stop(cdns, true); if (ret < 0) -- 2.43.0

1 0

[PATCH AUTOSEL 6.10 22/70] soundwire: intel_bus_common: enable interrupts before exiting reset
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit 5aedb8d8336b0a0421b58ca27d1b572aa6695b5b ] The existing code enables the Cadence IP interrupts after the bus reset sequence. The problem with this sequence is that it might be pre-empted, giving SoundWire devices time to sync and report as ATTACHED before the interrupts are enabled. In that case, the Cadence IP will not detect a state change and will not throw an interrupt to proceed with the enumeration of a Device0. In our overnight stress tests, we observed that a slight sub-millisecond delay in enabling interrupts after the reset was correlated with detection failures. This problem is more prevalent on the LunarLake silicon, likely due to SOC integration changes, but it was observed on earlier generations as well. This patch reverts the sequence, with the interrupts enabled before performing the bus reset. This removes the race condition and makes sure the Cadence IP is able to detect the presence of a Device0 in all cases. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805115003.88035-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/intel_bus_common.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index e5ac3cc7cb79b..179aa0d85951b 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -45,15 +45,15 @@ int intel_start_bus(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); + dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); + dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); return ret; } @@ -136,15 +136,15 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "unable to exit bus reset sequence during resume\n"); + dev_err(dev, "cannot enable interrupts during resume\n"); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "cannot enable interrupts during resume\n"); + dev_err(dev, "unable to exit bus reset sequence during resume\n"); return ret; } -- 2.43.0

1 0

[PATCH AUTOSEL 6.11 42/76] soundwire: cadence: re-check Peripheral status with delayed_work
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit f8c35d61ba01afa76846905c67862cdace7f66b0 ] The SoundWire peripheral enumeration is entirely based on interrupts, more specifically sticky bits tracking state changes. This patch adds a defensive programming check on the actual status reported in PING frames. If for some reason an interrupt was lost or delayed, the delayed work would detect a peripheral change of status after the bus starts. The 100ms defined for the delay is not completely arbitrary, if a Peripheral didn't join the bus within that delay then probably the hardware link is broken, and conversely if the detection didn't happen because of software issues the 100ms is still acceptable in terms of user experience. The overhead of the one-shot workqueue is minimal, and the mutual exclusion ensures that the interrupt and delayed work cannot update the status concurrently. Reviewed-by: Liam Girdwood <liam.r.girdwood(a)intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805114921.88007-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/cadence_master.c | 39 ++++++++++++++++++++++++++-- drivers/soundwire/cadence_master.h | 5 ++++ drivers/soundwire/intel.h | 2 ++ drivers/soundwire/intel_auxdevice.c | 1 + drivers/soundwire/intel_bus_common.c | 11 ++++++++ 5 files changed, 56 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index e0683a5975d10..05652e983539b 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -890,8 +890,14 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns, } } - if (is_slave) - return sdw_handle_slave_status(&cdns->bus, status); + if (is_slave) { + int ret; + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + return ret; + } return 0; } @@ -988,6 +994,31 @@ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) } EXPORT_SYMBOL(sdw_cdns_irq); +static void cdns_check_attached_status_dwork(struct work_struct *work) +{ + struct sdw_cdns *cdns = + container_of(work, struct sdw_cdns, attach_dwork.work); + enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; + u32 val; + int ret; + int i; + + val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT); + + for (i = 0; i <= SDW_MAX_DEVICES; i++) { + status[i] = val & 0x3; + if (status[i]) + dev_dbg(cdns->dev, "Peripheral %d status: %d\n", i, status[i]); + val >>= 2; + } + + mutex_lock(&cdns->status_update_lock); + ret = sdw_handle_slave_status(&cdns->bus, status); + mutex_unlock(&cdns->status_update_lock); + if (ret < 0) + dev_err(cdns->dev, "%s: sdw_handle_slave_status failed: %d\n", __func__, ret); +} + /** * cdns_update_slave_status_work - update slave status in a work since we will need to handle * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave @@ -1740,7 +1771,11 @@ int sdw_cdns_probe(struct sdw_cdns *cdns) init_completion(&cdns->tx_complete); cdns->bus.port_ops = &cdns_port_ops; + mutex_init(&cdns->status_update_lock); + INIT_WORK(&cdns->work, cdns_update_slave_status_work); + INIT_DELAYED_WORK(&cdns->attach_dwork, cdns_check_attached_status_dwork); + return 0; } EXPORT_SYMBOL(sdw_cdns_probe); diff --git a/drivers/soundwire/cadence_master.h b/drivers/soundwire/cadence_master.h index bc84435e420f5..e1d7969ba48ae 100644 --- a/drivers/soundwire/cadence_master.h +++ b/drivers/soundwire/cadence_master.h @@ -117,6 +117,8 @@ struct sdw_cdns_dai_runtime { * @link_up: Link status * @msg_count: Messages sent on bus * @dai_runtime_array: runtime context for each allocated DAI. + * @status_update_lock: protect concurrency between interrupt-based and delayed work + * status update */ struct sdw_cdns { struct device *dev; @@ -148,10 +150,13 @@ struct sdw_cdns { bool interrupt_enabled; struct work_struct work; + struct delayed_work attach_dwork; struct list_head list; struct sdw_cdns_dai_runtime **dai_runtime_array; + + struct mutex status_update_lock; /* add mutual exclusion to sdw_handle_slave_status() */ }; #define bus_to_cdns(_bus) container_of(_bus, struct sdw_cdns, bus) diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h index 68838e843b543..f4235f5991c37 100644 --- a/drivers/soundwire/intel.h +++ b/drivers/soundwire/intel.h @@ -103,6 +103,8 @@ static inline void intel_writew(void __iomem *base, int offset, u16 value) #define INTEL_MASTER_RESET_ITERATIONS 10 +#define SDW_INTEL_DELAYED_ENUMERATION_MS 100 + #define SDW_INTEL_CHECK_OPS(sdw, cb) ((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \ (sdw)->link_res->hw_ops->cb) #define SDW_INTEL_OPS(sdw, cb) ((sdw)->link_res->hw_ops->cb) diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c index 8807e01cbf7c7..dff49c5ce5b30 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -475,6 +475,7 @@ static void intel_link_remove(struct auxiliary_device *auxdev) */ if (!bus->prop.hw_disabled) { sdw_intel_debugfs_exit(sdw); + cancel_delayed_work_sync(&cdns->attach_dwork); sdw_cdns_enable_interrupt(cdns, false); } sdw_bus_master_delete(bus); diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index a75e5d7d87154..d3ff6c65b64c3 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -60,6 +60,9 @@ int intel_start_bus(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -151,6 +154,9 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) } sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -184,6 +190,9 @@ int intel_start_bus_after_clock_stop(struct sdw_intel *sdw) sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS); + schedule_delayed_work(&cdns->attach_dwork, + msecs_to_jiffies(SDW_INTEL_DELAYED_ENUMERATION_MS)); + return 0; } @@ -194,6 +203,8 @@ int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop) bool wake_enable = false; int ret; + cancel_delayed_work_sync(&cdns->attach_dwork); + if (clock_stop) { ret = sdw_cdns_clock_stop(cdns, true); if (ret < 0) -- 2.43.0

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[PATCH AUTOSEL 6.11 23/76] soundwire: intel_bus_common: enable interrupts before exiting reset
by Sasha Levin 04 Oct '24

04 Oct '24

From: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> [ Upstream commit 5aedb8d8336b0a0421b58ca27d1b572aa6695b5b ] The existing code enables the Cadence IP interrupts after the bus reset sequence. The problem with this sequence is that it might be pre-empted, giving SoundWire devices time to sync and report as ATTACHED before the interrupts are enabled. In that case, the Cadence IP will not detect a state change and will not throw an interrupt to proceed with the enumeration of a Device0. In our overnight stress tests, we observed that a slight sub-millisecond delay in enabling interrupts after the reset was correlated with detection failures. This problem is more prevalent on the LunarLake silicon, likely due to SOC integration changes, but it was observed on earlier generations as well. This patch reverts the sequence, with the interrupts enabled before performing the bus reset. This removes the race condition and makes sure the Cadence IP is able to detect the presence of a Device0 in all cases. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao(a)linux.intel.com> Link: https://lore.kernel.org/r/20240805115003.88035-1-yung-chuan.liao@linux.inte… Signed-off-by: Vinod Koul <vkoul(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/soundwire/intel_bus_common.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index df944e11b9caa..a75e5d7d87154 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -45,15 +45,15 @@ int intel_start_bus(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); + dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret); + dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret); return ret; } @@ -136,15 +136,15 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw) return ret; } - ret = sdw_cdns_exit_reset(cdns); + ret = sdw_cdns_enable_interrupt(cdns, true); if (ret < 0) { - dev_err(dev, "unable to exit bus reset sequence during resume\n"); + dev_err(dev, "cannot enable interrupts during resume\n"); return ret; } - ret = sdw_cdns_enable_interrupt(cdns, true); + ret = sdw_cdns_exit_reset(cdns); if (ret < 0) { - dev_err(dev, "cannot enable interrupts during resume\n"); + dev_err(dev, "unable to exit bus reset sequence during resume\n"); return ret; } -- 2.43.0

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[PATCH v2] ALSA: hda/realtek: Fix the push button function for the ALC257
by Oder Chiou 04 Oct '24

04 Oct '24

The headset push button cannot work properly in case of the ALC257. This patch reverted the previous commit to correct the side effect. Fixes: ef9718b3d54e ("ALSA: hda/realtek: Fix noise from speakers on Lenovo IdeaPad 3 15IAU7") Signed-off-by: Oder Chiou <oder_chiou(a)realtek.com> --- sound/pci/hda/patch_realtek.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index f787ff4182d4..86db1a4ec24c 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -587,6 +587,7 @@ static void alc_shutup_pins(struct hda_codec *codec) switch (codec->core.vendor_id) { case 0x10ec0236: case 0x10ec0256: + case 0x10ec0257: case 0x19e58326: case 0x10ec0283: case 0x10ec0285: -- 2.34.1

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[PATCH] ASoC: codecs: wcd9335: remove unnecessary MODULE_ALIAS()
by Masahiro Yamada 03 Oct '24

03 Oct '24

Since commit b4b818305578 ("slimbus: generate MODULE_ALIAS() from MODULE_DEVICE_TABLE()"), modpost automatically generates MODULE_ALIAS() from MODULE_DEVICE_TABLE(slim, ). Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> --- sound/soc/codecs/wcd9335.c | 1 - 1 file changed, 1 deletion(-) diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c index 373a31ddccb2..a2521e16c099 100644 --- a/sound/soc/codecs/wcd9335.c +++ b/sound/soc/codecs/wcd9335.c @@ -5177,4 +5177,3 @@ static struct slim_driver wcd9335_slim_driver = { module_slim_driver(wcd9335_slim_driver); MODULE_DESCRIPTION("WCD9335 slim driver"); MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("slim:217:1a0:*"); -- 2.43.0

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[PATCH] ASoC: dt-bindings: davinci-mcasp: Fix interrupts property
by Miquel Raynal 03 Oct '24

03 Oct '24

My understanding of the interrupts property is that it can either be: 1/ - TX 2/ - TX - RX 3/ - Common/combined. There are very little chances that either: - TX - Common/combined or even - TX - RX - Common/combined could be a thing. Looking at the interrupt-names definition (which uses oneOf instead of anyOf), it makes indeed little sense to use anyOf in the interrupts definition. I believe this is just a mistake, hence let's fix it. Fixes: 8be90641a0bb ("ASoC: dt-bindings: davinci-mcasp: convert McASP bindings to yaml schema") Signed-off-by: Miquel Raynal <miquel.raynal(a)bootlin.com> --- --- .../devicetree/bindings/sound/davinci-mcasp-audio.yaml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.yaml b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.yaml index 7735e08d35ba..ab3206ffa4af 100644 --- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.yaml +++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.yaml @@ -102,7 +102,7 @@ properties: default: 2 interrupts: - anyOf: + oneOf: - minItems: 1 items: - description: TX interrupt -- 2.43.0

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[PATCH v1] soundwire: Correct some typos in comments
by Shen Lichuan 03 Oct '24

03 Oct '24

Fixed some confusing spelling errors that were currently identified, the details are as follows: -in the code comments: drivers/soundwire/bus.c:115: enumuration==> enumeration drivers/soundwire/qcom.c:1176: wil ==> will drivers/soundwire/sysfs_slave.c:218: highligh ==> highlight Signed-off-by: Shen Lichuan <shenlichuan(a)vivo.com> --- drivers/soundwire/bus.c | 2 +- drivers/soundwire/qcom.c | 2 +- drivers/soundwire/sysfs_slave.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 263ca32f0c5c..d1dc62c34f1c 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -112,7 +112,7 @@ int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent, /* Set higher order bits */ *bus->assigned = ~GENMASK(SDW_BROADCAST_DEV_NUM, SDW_ENUM_DEV_NUM); - /* Set enumuration device number and broadcast device number */ + /* Set enumeration device number and broadcast device number */ set_bit(SDW_ENUM_DEV_NUM, bus->assigned); set_bit(SDW_BROADCAST_DEV_NUM, bus->assigned); diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index aed57002fd0e..2b403b14066c 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -1173,7 +1173,7 @@ static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl, else sconfig.direction = SDW_DATA_DIR_RX; - /* hw parameters wil be ignored as we only support PDM */ + /* hw parameters will be ignored as we only support PDM */ sconfig.ch_count = 1; sconfig.frame_rate = params_rate(params); sconfig.type = stream->type; diff --git a/drivers/soundwire/sysfs_slave.c b/drivers/soundwire/sysfs_slave.c index f4259710dd0f..c5c22d1708ec 100644 --- a/drivers/soundwire/sysfs_slave.c +++ b/drivers/soundwire/sysfs_slave.c @@ -215,7 +215,7 @@ const struct attribute_group *sdw_attr_groups[] = { /* * the status is shown in capital letters for UNATTACHED and RESERVED - * on purpose, to highligh users to the fact that these status values + * on purpose, to highlight users to the fact that these status values * are not expected. */ static const char *const slave_status[] = { -- 2.17.1

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