drm/bridge: display-connector: detect DP state if cable is plugged on boot by YongxingMou · Pull Request #397 · qualcomm-linux/kernel

YongxingMou · 2026-03-31T07:15:20Z

Unlike the USB-C AltMode handling and unlike the DP controller handling
the HPD on its own, if the display-connector is being used to handle the
HPD pin, DP controller might not be able to get either the HPD
notification nor detect the cable state if the cable is plugged in
before the system has booted.

Make the display-connector send the HPD notifications during system
startup for DisplayPort connectors.

It's typically not a problem for other types of display connectors since
there is no special procedure to detect if the monitor is actually
plugged in or not.

CRs-Fixed:4455495

If HPD IRQ is enabled in the display_connector's probe, it can be triggered too early, before the DRM connector is completely setup. Use the enable_hpd / disable_hpd callbacks to control enablement of the HPD IRQ. Fixes: 0c275c3 ("drm/bridge: Add bridge driver for display connectors") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Link: https://lore.kernel.org/all/20260314-dp-connector-hpd-v1-1-786044cedc17@oss.qualcomm.com/

shashim-quic

qcom-6.18.y-check

Associate your CR with this github PR else orbit check will keep failing

…r DP If the DisplayPort drivers use display-connector for the HPD detection, the internal HPD state machine might be not active and thus the hardware might be not able to handle cable detection correctly. Instead it will depend on the externall HPD notifications to set the cable state, bypassing the internal HPD state machine (for example this is the case for the msm DP driver). However if the cable has been plugged before the HPD IRQ has been enabled, there will be no HPD event coming. The drivers might fail detection in such a case. Trigger the HPD notification after enabling the HPD IRQ, propagating the cable insertion state. Fixes: 2e2bf3a ("drm/bridge: display-connector: add DP support") Reported-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Link: https://lore.kernel.org/all/20260314-dp-connector-hpd-v1-2-786044cedc17@oss.qualcomm.com/

YongxingMou · 2026-04-01T02:48:23Z

qcom-6.18.y-check

Associate your CR with this github PR else orbit check will keep failing
Done.

qcomlnxci · 2026-04-07T18:44:44Z

Test jobs on 481191b

qcomlnxci · 2026-04-07T18:44:46Z

Test Matrix

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

qcomlnxci · 2026-04-08T09:17:50Z

Test jobs on 481191b

qcomlnxci · 2026-04-08T09:17:53Z

Test Matrix

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

qcomlnxci · 2026-04-08T11:06:28Z

Test Matrix

Test Case	lemans-evk	monaco-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp
0_qcom-next-ci-premerge-tests	◻️	◻️	◻️	◻️	◻️	◻️	❌ Fail
BT_FW_KMD_Service	❌ Fail	❌ Fail	❌ Fail	✅ Pass	◻️	❌ Fail	❌ Fail
BT_ON_OFF	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	⚠️ skip
BT_SCAN	✅ Pass	❌ Fail	✅ 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	◻️
Ethernet	✅ Pass	✅ Pass	⚠️ 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	❌ Fail	◻️	❌ Fail	❌ Fail
RMNET	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass
UFS_Validation	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass
USBHost	✅ Pass	✅ Pass	✅ Pass	❌ Fail	◻️	✅ Pass	❌ Fail
WiFi_Firmware_Driver	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	◻️
WiFi_OnOff	✅ Pass	⚠️ 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	✅ Pass	◻️	✅ Pass	❌ Fail
rngtest	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass
shmbridge	✅ Pass	✅ Pass	❌ Fail	✅ Pass	◻️	❌ Fail	✅ Pass
smmu	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass
watchdog	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	◻️
wpss_remoteproc	✅ Pass	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass

qcomlnxci · 2026-04-08T11:06:28Z

Test jobs on 481191b

qcomlnxci · 2026-04-08T11:40:46Z

Test jobs on 481191b

qcomlnxci · 2026-04-08T11:40:47Z

Test Matrix

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

YongxingMou requested a review from a team March 31, 2026 07:15

YongxingMou force-pushed the for-2.0-DPprebot branch 2 times, most recently from aff469d to c523701 Compare March 31, 2026 07:19

shashim-quic requested changes Mar 31, 2026

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YongxingMou force-pushed the for-2.0-DPprebot branch from c523701 to 9ee3f54 Compare April 1, 2026 02:47

YongxingMou force-pushed the for-2.0-DPprebot branch from 9ee3f54 to 481191b Compare April 1, 2026 02:47

YongxingMou requested a review from shashim-quic April 1, 2026 02:52

shashim-quic approved these changes Apr 7, 2026

View reviewed changes

sgaud-quic merged commit 8915fc6 into qualcomm-linux:qcom-6.18.y Apr 8, 2026
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drm/bridge: display-connector: detect DP state if cable is plugged on boot#397

drm/bridge: display-connector: detect DP state if cable is plugged on boot#397
sgaud-quic merged 2 commits intoqualcomm-linux:qcom-6.18.yfrom
YongxingMou:for-2.0-DPprebot

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Test jobs on 481191b

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Test Matrix

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Test jobs on 481191b

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Test Matrix

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Test Matrix

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Test jobs on 481191b

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Test jobs on 481191b

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YongxingMou commented Mar 31, 2026 •

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