[PATCH 7/8] soundwire: amd: replace >= ACP70 with explicit switch/case in PM paths
From: Vijendar Mukunda
Date: Thu Sep 10 2026 - 15:09:07 EST
Replace open-ended acp_rev >= ACP70_PCI_REV_ID comparisons in
amd_suspend(), amd_suspend_runtime(), and amd_resume_runtime() with
explicit per-revision handling enumerating ACP63, ACP70, ACP71, and
ACP72, so that every supported revision is handled explicitly.
The host wake enable step is guarded by acp_rev at six PM call sites.
Factor that repeated block into amd_sdw_host_wake_enable_by_rev() to
avoid duplicating the switch/case at every site. The remaining device
state transitions keep an inline switch/case as one of them carries
additional PME handling.
An unrecognised revision cannot reach these PM callbacks because
amd_sdw_manager_probe() already validates acp_rev with the same switch
and fails registration for anything unknown. The switch default therefore
emits dev_err() and returns -EINVAL to make the unexpected case visible
while keeping the error path consistent across all PM operations.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
drivers/soundwire/amd_manager.c | 97 ++++++++++++++++++++++-----------
1 file changed, 64 insertions(+), 33 deletions(-)
diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 6af224ca54a3..0cb5f4694e9a 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -1292,6 +1292,22 @@ static int __maybe_unused amd_pm_prepare(struct device *dev)
return 0;
}
+static int amd_sdw_host_wake_enable_by_rev(struct amd_sdw_manager *amd_manager, bool enable)
+{
+ switch (amd_manager->acp_rev) {
+ case ACP63_PCI_REV_ID:
+ break;
+ case ACP70_PCI_REV_ID:
+ case ACP71_PCI_REV_ID:
+ case ACP72_PCI_REV_ID:
+ return amd_sdw_host_wake_enable(amd_manager, enable);
+ default:
+ dev_err(amd_manager->dev, "unexpected acp_rev 0x%x\n", amd_manager->acp_rev);
+ return -EINVAL;
+ }
+ return 0;
+}
+
static int __maybe_unused amd_suspend(struct device *dev)
{
struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
@@ -1307,22 +1323,18 @@ static int __maybe_unused amd_suspend(struct device *dev)
if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
cancel_work_sync(&amd_manager->amd_sdw_work);
amd_sdw_wake_enable(amd_manager, false);
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, false);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, false);
+ if (ret)
+ return ret;
ret = amd_sdw_clock_stop(amd_manager);
if (ret)
return ret;
} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
cancel_work_sync(&amd_manager->amd_sdw_work);
amd_sdw_wake_enable(amd_manager, false);
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, false);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, false);
+ if (ret)
+ return ret;
/*
* As per hardware programming sequence on AMD platforms,
* clock stop should be invoked first before powering-off
@@ -1335,10 +1347,19 @@ static int __maybe_unused amd_suspend(struct device *dev)
if (ret)
return ret;
}
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+ switch (amd_manager->acp_rev) {
+ case ACP63_PCI_REV_ID:
+ break;
+ case ACP70_PCI_REV_ID:
+ case ACP71_PCI_REV_ID:
+ case ACP72_PCI_REV_ID:
ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D3);
if (ret)
return ret;
+ break;
+ default:
+ dev_err(amd_manager->dev, "unexpected acp_rev 0x%x\n", amd_manager->acp_rev);
+ return -EINVAL;
}
return 0;
}
@@ -1357,21 +1378,17 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
}
if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
amd_sdw_wake_enable(amd_manager, true);
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, true);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, true);
+ if (ret)
+ return ret;
ret = amd_sdw_clock_stop(amd_manager);
if (ret)
return ret;
} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
amd_sdw_wake_enable(amd_manager, true);
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, true);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, true);
+ if (ret)
+ return ret;
ret = amd_sdw_clock_stop(amd_manager);
if (ret)
return ret;
@@ -1380,7 +1397,12 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
if (ret)
return ret;
}
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+ switch (amd_manager->acp_rev) {
+ case ACP63_PCI_REV_ID:
+ break;
+ case ACP70_PCI_REV_ID:
+ case ACP71_PCI_REV_ID:
+ case ACP72_PCI_REV_ID:
ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D3);
if (ret)
return ret;
@@ -1392,6 +1414,10 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
dev_dbg(amd_manager->dev, "ACP_PME_EN:0x%x\n", val);
}
}
+ break;
+ default:
+ dev_err(amd_manager->dev, "unexpected acp_rev 0x%x\n", amd_manager->acp_rev);
+ return -EINVAL;
}
return 0;
}
@@ -1413,11 +1439,9 @@ static int __maybe_unused amd_resume_runtime(struct device *dev)
ret = amd_sdw_clock_stop_exit(amd_manager);
if (ret)
return ret;
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, false);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, false);
+ if (ret)
+ return ret;
} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
/*
@@ -1431,11 +1455,9 @@ static int __maybe_unused amd_resume_runtime(struct device *dev)
mutex_lock(&amd_manager->bus.msg_lock);
amd_manager->ping_slave_stat = U32_MAX;
mutex_unlock(&amd_manager->bus.msg_lock);
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
- ret = amd_sdw_host_wake_enable(amd_manager, false);
- if (ret)
- return ret;
- }
+ ret = amd_sdw_host_wake_enable_by_rev(amd_manager, false);
+ if (ret)
+ return ret;
val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
if (val) {
val |= AMD_SDW_CLK_RESUME_REQ;
@@ -1461,10 +1483,19 @@ static int __maybe_unused amd_resume_runtime(struct device *dev)
return ret;
amd_sdw_set_frameshape(amd_manager);
}
- if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+ switch (amd_manager->acp_rev) {
+ case ACP63_PCI_REV_ID:
+ break;
+ case ACP70_PCI_REV_ID:
+ case ACP71_PCI_REV_ID:
+ case ACP72_PCI_REV_ID:
ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D0);
if (ret)
return ret;
+ break;
+ default:
+ dev_err(amd_manager->dev, "unexpected acp_rev 0x%x\n", amd_manager->acp_rev);
+ return -EINVAL;
}
return 0;
}
--
2.48.1