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FROMLIST: PCI: qcom: Add .get_ltssm() helper#304

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FROMLIST: PCI: qcom: Add .get_ltssm() helper#304
krishnachaitanya-linux wants to merge 1 commit intoqualcomm-linux:qcom-6.18.yfrom
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@krishnachaitanya-linux krishnachaitanya-linux commented Feb 24, 2026

For older targets like sc7280, we see reading DBI after sending PME turn off message is causing NOC error.

To avoid unsafe DBI accesses, introduce qcom_pcie_get_ltssm(), which retrieves the LTSSM state from the PARF_LTSSM register instead.

Link: https://lore.kernel.org/r/20260217-d3cold-v2-3-89b322864043@oss.qualcomm.com

CRs-Fixed: 4440925

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FROMLIST: PCI: qcom: Add .get_ltssm() helper
e39cedc 
For older targets like sc7280, we see reading DBI after sending PME
turn off message is causing NOC error.

To avoid unsafe DBI accesses, introduce qcom_pcie_get_ltssm(), which
retrieves the LTSSM state from the PARF_LTSSM register instead.

Link: https://lore.kernel.org/r/20260217-d3cold-v2-3-89b322864043@oss.qualcomm.com
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
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qcomlnxci commented Feb 24, 2026

Test jobs on e39cedc

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qcomlnxci commented Feb 24, 2026

Test Matrix

Test Case kaanapali-mtp lemans-evk monaco-evk qcs615-ride qcs6490-rb3gen2 qcs8300-ride qcs9100-ride-r3 sm8750-mtp x1e80100-crd
0_qcom-next-ci-premerge-tests ◻️ ❌ Fail ❌ Fail ◻️ ❌ Fail ❌ Fail ❌ Fail ❌ Fail ◻️
BT_FW_KMD_Service ◻️ ❌ Fail ❌ Fail ◻️ ✅ Pass ❌ Fail ✅ Pass ❌ Fail ◻️
BT_ON_OFF ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ⚠️ skip ◻️
BT_SCAN ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ⚠️ skip ◻️
CPUFreq_Validation ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
CPU_affinity ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
DSP_AudioPD ◻️ ❌ Fail ✅ Pass ◻️ ✅ Pass ✅ Pass ❌ Fail ◻️ ◻️
Ethernet ◻️ ⚠️ skip ⚠️ skip ◻️ ⚠️ skip ⚠️ skip ⚠️ skip ⚠️ skip ◻️
Freq_Scaling ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ❌ Fail ◻️
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 ◻️ ◻️
PCIe ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
Probe_Failure_Check ◻️ ❌ Fail ❌ Fail ◻️ ✅ Pass ✅ Pass ✅ Pass ❌ Fail ◻️
RMNET ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
UFS_Validation ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
USBHost ◻️ ❌ Fail ❌ Fail ◻️ ❌ Fail ✅ Pass ✅ Pass ❌ Fail ◻️
WiFi_Firmware_Driver ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ◻️ ◻️
WiFi_OnOff ◻️ ⚠️ skip ⚠️ skip ◻️ ✅ Pass ✅ Pass ✅ Pass ◻️ ◻️
cdsp_remoteproc ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ❌ Fail ◻️
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 ◻️ ◻️
remoteproc ◻️ ✅ Pass ❌ Fail ◻️ ✅ Pass ❌ Fail ✅ Pass ❌ Fail ◻️
rngtest ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ❌ Fail ✅ Pass ✅ Pass ◻️
shmbridge ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ❌ Fail ✅ Pass ✅ Pass ◻️
smmu ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️
watchdog ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ◻️ ◻️
wpss_remoteproc ◻️ ✅ Pass ✅ Pass ◻️ ✅ Pass ✅ Pass ✅ Pass ✅ Pass ◻️

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@vbadigan vbadigan vbadigan approved these changes

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