Enabling turbo mode disables hardware clock gating. Suspend requires
hardware clock gating to be re-enabled, otherwise suspend will fail.
Fix this by calling aie2_runtime_cfg() from aie2_hw_stop() to
re-enable clock gating during suspend. Also ensure that firmware is
initialized in aie2_hw_start() before modifying clock-gating
settings during resume.

Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
---
 drivers/accel/amdxdna/aie2_pci.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/accel/amdxdna/aie2_pci.c b/drivers/accel/amdxdna/aie2_pci.c
index 5b326e4610e6..0d41a6764892 100644
--- a/drivers/accel/amdxdna/aie2_pci.c
+++ b/drivers/accel/amdxdna/aie2_pci.c
@@ -323,6 +323,7 @@ static void aie2_hw_stop(struct amdxdna_dev *xdna)
 		return;
 	}
 
+	aie2_runtime_cfg(ndev, AIE2_RT_CFG_CLK_GATING, NULL);
 	aie2_mgmt_fw_fini(ndev);
 	xdna_mailbox_stop_channel(ndev->mgmt_chann);
 	xdna_mailbox_destroy_channel(ndev->mgmt_chann);
@@ -406,15 +407,15 @@ static int aie2_hw_start(struct amdxdna_dev *xdna)
 		goto stop_psp;
 	}
 
-	ret = aie2_pm_init(ndev);
+	ret = aie2_mgmt_fw_init(ndev);
 	if (ret) {
-		XDNA_ERR(xdna, "failed to init pm, ret %d", ret);
+		XDNA_ERR(xdna, "initial mgmt firmware failed, ret %d", ret);
 		goto destroy_mgmt_chann;
 	}
 
-	ret = aie2_mgmt_fw_init(ndev);
+	ret = aie2_pm_init(ndev);
 	if (ret) {
-		XDNA_ERR(xdna, "initial mgmt firmware failed, ret %d", ret);
+		XDNA_ERR(xdna, "failed to init pm, ret %d", ret);
 		goto destroy_mgmt_chann;
 	}
 
-- 
2.34.1

On 2/10/26 1:16 PM, Lizhi Hou wrote:
> Enabling turbo mode disables hardware clock gating. Suspend requires
> hardware clock gating to be re-enabled, otherwise suspend will fail.
> Fix this by calling aie2_runtime_cfg() from aie2_hw_stop() to
> re-enable clock gating during suspend. Also ensure that firmware is
> initialized in aie2_hw_start() before modifying clock-gating
> settings during resume.
> 
> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Fixes tag?
> ---
>   drivers/accel/amdxdna/aie2_pci.c | 9 +++++----
>   1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/accel/amdxdna/aie2_pci.c b/drivers/accel/amdxdna/aie2_pci.c
> index 5b326e4610e6..0d41a6764892 100644
> --- a/drivers/accel/amdxdna/aie2_pci.c
> +++ b/drivers/accel/amdxdna/aie2_pci.c
> @@ -323,6 +323,7 @@ static void aie2_hw_stop(struct amdxdna_dev *xdna)
>   		return;
>   	}
>   
> +	aie2_runtime_cfg(ndev, AIE2_RT_CFG_CLK_GATING, NULL);
>   	aie2_mgmt_fw_fini(ndev);
>   	xdna_mailbox_stop_channel(ndev->mgmt_chann);
>   	xdna_mailbox_destroy_channel(ndev->mgmt_chann);
> @@ -406,15 +407,15 @@ static int aie2_hw_start(struct amdxdna_dev *xdna)
>   		goto stop_psp;
>   	}
>   
> -	ret = aie2_pm_init(ndev);
> +	ret = aie2_mgmt_fw_init(ndev);
>   	if (ret) {
> -		XDNA_ERR(xdna, "failed to init pm, ret %d", ret);
> +		XDNA_ERR(xdna, "initial mgmt firmware failed, ret %d", ret);
>   		goto destroy_mgmt_chann;
>   	}
>   
> -	ret = aie2_mgmt_fw_init(ndev);
> +	ret = aie2_pm_init(ndev);
>   	if (ret) {
> -		XDNA_ERR(xdna, "initial mgmt firmware failed, ret %d", ret);
> +		XDNA_ERR(xdna, "failed to init pm, ret %d", ret);
>   		goto destroy_mgmt_chann;
>   	}
>