BACKPORT: driver: bluetooth: hci_qca: Fix SSR (SubSystem Restart) fail when BT_EN is pulled up by hw

[shuaz-shuai]

On QCS9075 and QCA8275 platforms, the BT_EN pin is always pulled up by hw and cannot be controlled by the host. As a result, in case of a firmware crash, the host cannot trigger a cold reset. Instead, the BT controller performs a warm restart on its own, without reloading the firmware.

This leads to the controller remaining in IBS_WAKE state, while the host expects it to be in sleep mode. The mismatch causes HCI reset commands to time out. Additionally, the driver does not clear internal flags QCA_SSR_TRIGGERED and QCA_IBS_DISABLED, which blocks the reset sequence. If the SSR duration exceeds 2 seconds, the host may enter TX sleep mode due to tx_idle_timeout, further preventing recovery. Also, memcoredump_flag is not cleared, so only the first SSR generates a coredump.

Tell the driver that the BT controller has undergone a proper restart sequence:

• Clear QCA_SSR_TRIGGERED and QCA_IBS_DISABLED flags after SSR.
• Add a 50ms delay to allow the controller to complete its warm reset.
• Reset tx_idle_timer to prevent the host from entering TX sleep mode.
• Clear memcoredump_flag to allow multiple coredump captures.

Apply these steps only when HCI_QUIRK_NON_PERSISTENT_SETUP is not set, which indicates that BT_EN is defined in DTS and cannot be toggled.

Refer to the comment in include/net/bluetooth/hci.h for details on HCI_QUIRK_NON_PERSISTENT_SETUP.

Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@oss.qualcomm.com

CRs-Fixed: 4436122

[shashim-quic]

CRs-Fixed: 4436122

Same , just add to PR description not to commit log.

[qcomlnxci]

Test jobs on 215be99

• Job 37166 on kaanapali-qrd
• Job 37170 on lemans-evk
• Job 37165 on qcs615-ride
• Job 37169 on qcs6490-rb3gen2
• Job 37168 on qcs8300-ride
• Job 37167 on qcs9100-ride-r3
• Job 37171 on sm8750-mtp
• Job 37172 on x1e80100-crd

[qcomlnxci]

Test Matrix

Test Case	kaanapali-qrd	lemans-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp	x1e80100-crd
BT_FW_KMD_Service	◻️	❌ Fail	◻️	✅ Pass	✅ Pass	✅ Pass	❌ Fail	◻️
BT_ON_OFF	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	⚠️ skip	◻️
BT_SCAN	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	⚠️ skip	◻️
CPUFreq_Validation	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
CPU_affinity	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
DSP_AudioPD	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
Ethernet	◻️	⚠️ skip	◻️	⚠️ skip	⚠️ skip	⚠️ skip	⚠️ skip	◻️
Freq_Scaling	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	❌ Fail	◻️
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	◻️	✅ Pass	✅ Pass	✅ Pass	❌ Fail	◻️
RMNET	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
UFS_Validation	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
USBHost	◻️	❌ Fail	◻️	❌ Fail	✅ Pass	✅ Pass	❌ Fail	◻️
WiFi_Firmware_Driver	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	⚠️ skip	◻️
WiFi_OnOff	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	⚠️ skip	◻️
cdsp_remoteproc	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	❌ Fail	◻️
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	❌ Fail	✅ Pass	❌ Fail	◻️
rngtest	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
shmbridge	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
smmu	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
watchdog	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️
wpss_remoteproc	◻️	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️