FROMLIST: iommu/arm-smmu-qcom: Fix fastrpc compatible string in ACTLR…

[bibekpatro]

… client match table

The qcom_smmu_actlr_client_of_match table contained "qcom,fastrpc" as the compatible string for applying ACTLR prefetch settings to FastRPC devices. However, "qcom,fastrpc" is the compatible string for the parent rpmsg channel node, which is not an IOMMU client — it carries no "iommus" property in the device tree and is never attached to an SMMU context bank.

The actual IOMMU clients are the compute context bank (CB) child nodes, which use the compatible string "qcom,fastrpc-compute-cb". These nodes carry the "iommus" property and are probed by fastrpc_cb_driver via fastrpc_cb_probe(), which sets up the DMA mask and IOMMU mappings for each FastRPC session. The device tree structure is:

fastrpc {
compatible = "qcom,fastrpc"; /* rpmsg channel, no iommus /
...
compute-cb@3 {
compatible = "qcom,fastrpc-compute-cb";
iommus = <&apps_smmu 0x1823 0x0>; / actual IOMMU client */
};
};

Since qcom_smmu_set_actlr_dev() calls of_match_device() against the device being attached to the SMMU context bank, the "qcom,fastrpc" entry was never matching any device. As a result, the ACTLR prefetch settings (PREFETCH_DEEP | CPRE | CMTLB) were silently never applied for FastRPC compute context banks.

Fix this by replacing "qcom,fastrpc" with "qcom,fastrpc-compute-cb" in the match table so that the ACTLR settings are correctly applied to the compute CB devices that are the true IOMMU clients.

Link: https://lore.kernel.org/all/20251209052323.1133495-1-bibek.patro@oss.qualcomm.com/
Assisted-by: Anthropic:claude-4-6-sonnet
Fixes: 3e35c3e ("iommu/arm-smmu: Add ACTLR data and support for qcom_smmu_500")
CRs-Fixed: 4412146

[qcomlnxci]

Test jobs on a75707d

• Job 72672 on lemans-evk
• Job 72676 on monaco-evk
• Job 72673 on qcs615-ride
• Job 72674 on qcs6490-rb3gen2
• Job 72677 on qcs8300-ride
• Job 72678 on qcs9100-ride-r3
• Job 72679 on sm8750-mtp
• Job 72675 on x1e80100-crd

[qcomlnxci]

Test Matrix

Test Case	lemans-evk	monaco-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp	x1e80100-crd
BT_FW_KMD_Service	❌ Fail	❌ Fail	◻️	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
BT_ON_OFF	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
BT_SCAN	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
CPUFreq_Validation	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
CPU_affinity	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
DSP_AudioPD	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Ethernet	✅ Pass	✅ Pass	◻️	⚠️ skip	✅ Pass	⚠️ skip	◻️	◻️
Freq_Scaling	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
GIC	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
IPA	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Interrupts	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
OpenCV	⚠️ skip	⚠️ skip	◻️	⚠️ skip	⚠️ skip	⚠️ skip	◻️	◻️
PCIe	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Probe_Failure_Check	❌ Fail	❌ Fail	◻️	❌ Fail	❌ Fail	❌ Fail	◻️	◻️
RMNET	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
UFS_Validation	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
USBHost	✅ Pass	✅ Pass	◻️	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
WiFi_Firmware_Driver	⚠️ skip	⚠️ skip	◻️	⚠️ skip	⚠️ skip	⚠️ skip	◻️	◻️
WiFi_OnOff	✅ Pass	⚠️ skip	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
cdsp_remoteproc	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
hotplug	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
irq	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
kaslr	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
pinctrl	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
qcom_hwrng	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
remoteproc	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
rngtest	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
shmbridge	✅ Pass	✅ Pass	◻️	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
smmu	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
watchdog	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
wpss_remoteproc	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️	◻️

[sgaud-quic]

Infra issue with qcs615-ride device, will wait for tests to complete on it.

[qcomlnxci]

Test Matrix

Test Case	lemans-evk	monaco-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp	x1e80100-crd
BT_FW_KMD_Service	❌ Fail	❌ Fail	✅ Pass	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
BT_ON_OFF	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
BT_SCAN	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
CPUFreq_Validation	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
CPU_affinity	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
DSP_AudioPD	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Ethernet	✅ Pass	✅ Pass	⚠️ skip	⚠️ skip	✅ Pass	⚠️ skip	◻️	◻️
Freq_Scaling	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
GIC	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
IPA	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Interrupts	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
OpenCV	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	◻️	◻️
PCIe	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
Probe_Failure_Check	❌ Fail	❌ Fail	✅ Pass	❌ Fail	❌ Fail	❌ Fail	◻️	◻️
RMNET	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
UFS_Validation	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
USBHost	✅ Pass	✅ Pass	✅ Pass	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
WiFi_Firmware_Driver	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	◻️	◻️
WiFi_OnOff	✅ Pass	⚠️ skip	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
cdsp_remoteproc	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
hotplug	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
irq	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
kaslr	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
pinctrl	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
qcom_hwrng	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
remoteproc	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
rngtest	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
shmbridge	✅ Pass	✅ Pass	✅ Pass	❌ Fail	✅ Pass	✅ Pass	◻️	◻️
smmu	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
watchdog	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️
wpss_remoteproc	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	◻️

[qcomlnxci]

Test jobs on a75707d

• Job 72672 on lemans-evk
• Job 72676 on monaco-evk
• Job 73132 on qcs615-ride
• Job 72674 on qcs6490-rb3gen2
• Job 72677 on qcs8300-ride
• Job 72678 on qcs9100-ride-r3
• Job 72679 on sm8750-mtp
• Job 72675 on x1e80100-crd