Both DisplayPort and HDMI standards define a way for the Sink / display to notify the Source / host about some kinds of events. In case of HDMI it's as simple as singnalling changes to the EDID. In case of DisplayPort it's more complicated and requires actual checking of the DPCD registers.
Currently USB-C drivers don't have a way to deliver the IRQ_HPD notifications, leading to missing MST notifications. Provide necessary plumbing to let IRQ_HPD events be passed to the DisplayPort drivers. Note: the Yoga C630 UCSI driver and Acer Aspire1 EC driver are not yet enabled to send the IRQ_HPD events. Both of them would need some more reverse engineering to find out how the event is being reported by the EC. Signed-off-by: Dmitry Baryshkov <[email protected]> --- Changes in v8: - Moved the OMAP DSS HDMI5 chunk (Sashiko) - Link to v7: https://patch.msgid.link/[email protected] Changes in v7: - Fix build error in drm/msm/dp, forgot to squash a patch - Link to v6: https://patch.msgid.link/[email protected] Changes in v6: - Corrected indentation of args after the function rename (Chaoyi Chen) - Reordered / rehashed patches to be more logical (Chaoyi Chen) - Fixed build error in the OMAPDSS HDMI driver (Sashiko) - Fixed IRQ_HPD vs PLUG interaction in drm/msm/dp (Sashiko) - Link to v5: https://patch.msgid.link/[email protected] Changes in v5: - Renamed drm_connector_status_extra to drm_connector_dp_event (Maxime) - Link to v4: https://patch.msgid.link/[email protected] Changes in v4: - Renamed drm_connector_oob_hotplug_event() to drm_connector_dp_oob_status() (Maxime) - Reworked commit messages, explaining what it is about (Bjorn) - Rearranged commits, making them a bit more logical. - Link to v3: https://patch.msgid.link/[email protected] Changes in v3: - Fixed build error if aux bridges are disabled (Intel GFX CI) - Link to v2: https://patch.msgid.link/[email protected] Changes in v2: - Change irq_hpd arg to be an enum, possibly desribing other uses (Toni) - Account for that, chaning the API accordingly (with_irq -> extra, etc.) - Wire up AUX bridge notifications - Link to v1: https://patch.msgid.link/[email protected] To: Maarten Lankhorst <[email protected]> To: Maxime Ripard <[email protected]> To: Thomas Zimmermann <[email protected]> To: David Airlie <[email protected]> To: Simona Vetter <[email protected]> To: Heikki Krogerus <[email protected]> To: Greg Kroah-Hartman <[email protected]> To: Andrzej Hajda <[email protected]> To: Neil Armstrong <[email protected]> To: Robert Foss <[email protected]> To: Laurent Pinchart <[email protected]> To: Jonas Karlman <[email protected]> To: Jernej Skrabec <[email protected]> To: Luca Ceresoli <[email protected]> To: Jani Nikula <[email protected]> To: Rodrigo Vivi <[email protected]> To: Joonas Lahtinen <[email protected]> To: Tvrtko Ursulin <[email protected]> To: Francesco Dolcini <[email protected]> To: Kevin Hilman <[email protected]> To: Jerome Brunet <[email protected]> To: Martin Blumenstingl <[email protected]> To: Rob Clark <[email protected]> To: Dmitry Baryshkov <[email protected]> To: Abhinav Kumar <[email protected]> To: Jessica Zhang <[email protected]> To: Sean Paul <[email protected]> To: Marijn Suijten <[email protected]> To: Tomi Valkeinen <[email protected]> To: Bjorn Andersson <[email protected]> To: Konrad Dybcio <[email protected]> To: Pengyu Luo <[email protected]> To: Chaoyi Chen <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] --- Dmitry Baryshkov (9): drm/connector: report out-of-band IRQ_HPD events drm/connector: pass down IRQ_HPD to the drivers drm/bridge: pass down IRQ_HPD to the drivers drm/bridge: pass extra events to the HPD callback drm/bridge: aux-hpd: let drivers pass IRQ_HPD events drm/msm/dp: don't take extra references on multiple plug events drm/msm/dp: handle the IRQ_HPD events reported by USB-C soc: qcom: pmic-glink-altmode: pass down HPD_IRQ events usb: typec: ucsi: huawei-gaokun: pass down HPD_IRQ events drivers/gpu/drm/bridge/aux-hpd-bridge.c | 11 +++++---- drivers/gpu/drm/bridge/chrontel-ch7033.c | 3 ++- drivers/gpu/drm/bridge/lontium-lt8912b.c | 3 ++- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 3 ++- drivers/gpu/drm/bridge/ti-tfp410.c | 3 ++- drivers/gpu/drm/display/drm_bridge_connector.c | 22 ++++++++++-------- drivers/gpu/drm/drm_bridge.c | 20 ++++++++++------- drivers/gpu/drm/drm_connector.c | 22 ++++++++++-------- drivers/gpu/drm/i915/display/intel_dp.c | 3 ++- drivers/gpu/drm/meson/meson_encoder_hdmi.c | 3 ++- drivers/gpu/drm/msm/dp/dp_display.c | 12 +++++++--- drivers/gpu/drm/msm/dp/dp_drm.h | 3 ++- drivers/gpu/drm/omapdrm/dss/hdmi4.c | 3 ++- drivers/gpu/drm/omapdrm/dss/hdmi5.c | 3 ++- drivers/soc/qcom/pmic_glink_altmode.c | 6 ++++- drivers/usb/typec/altmodes/displayport.c | 25 +++++++++++++-------- drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c | 11 +++++---- include/drm/bridge/aux-bridge.h | 13 +++++++++-- include/drm/drm_bridge.h | 31 +++++++++++++++++++++----- include/drm/drm_connector.h | 24 +++++++++++++++++--- 20 files changed, 158 insertions(+), 66 deletions(-) --- base-commit: 725953d4da85cfb97a4c309fad6346b72f8529e7 change-id: 20260414-hpd-irq-events-e72bc076a5f1 Best regards, -- With best wishes Dmitry
