linux-kernel - [PATCH v4 0/5] drm/msm/dp: implement HPD notifications handling

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Message-Id: <20220502165316.4167199-1-bjorn.andersson@linaro.org>
Date:   Mon,  2 May 2022 09:53:11 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     Stephen Boyd <swboyd@...omium.org>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-usb@...r.kernel.org
Subject: [PATCH v4 0/5] drm/msm/dp: implement HPD notifications handling

USB altmodes code would send OOB notifications to the drm_connector
specified in the device tree. However as the MSM DP driver uses
drm_bridge_connector, there is no way to receive these event directly.
Implement a bridge between oob_hotplug_event and drm_bridge's hpd_notify
and use it to deliver altmode messages to the MSM DP driver.

Note, I left the original 'bool connected' field to be used by the
notifiers. However I think that it should be replaced in favour of using
the dp->hpd_state properly.

Bjorn Andersson (2):
  drm: Add HPD state to drm_connector_oob_hotplug_event()
  drm/msm/dp: Implement hpd_notify()

Dmitry Baryshkov (3):
  drm/bridge_connector: stop filtering events in
    drm_bridge_connector_hpd_cb()
  drm/bridge_connector: implement oob_hotplug_event
  drm/msm/dp: remove most of usbpd-related remains

 drivers/gpu/drm/drm_bridge_connector.c   | 17 +++--
 drivers/gpu/drm/drm_connector.c          |  6 +-
 drivers/gpu/drm/i915/display/intel_dp.c  | 17 ++++-
 drivers/gpu/drm/i915/i915_drv.h          |  3 +
 drivers/gpu/drm/msm/Makefile             |  1 -
 drivers/gpu/drm/msm/dp/dp_ctrl.h         |  1 -
 drivers/gpu/drm/msm/dp/dp_debug.c        |  6 +-
 drivers/gpu/drm/msm/dp/dp_debug.h        |  4 +-
 drivers/gpu/drm/msm/dp/dp_display.c      | 81 +++++++++++-------------
 drivers/gpu/drm/msm/dp/dp_display.h      |  1 +
 drivers/gpu/drm/msm/dp/dp_drm.c          |  3 +
 drivers/gpu/drm/msm/dp/dp_drm.h          |  2 +
 drivers/gpu/drm/msm/dp/dp_hpd.c          | 67 --------------------
 drivers/gpu/drm/msm/dp/dp_hpd.h          | 78 -----------------------
 drivers/gpu/drm/msm/dp/dp_panel.h        |  1 -
 drivers/gpu/drm/msm/dp/dp_power.c        |  2 +-
 drivers/gpu/drm/msm/dp/dp_power.h        |  3 +-
 drivers/usb/typec/altmodes/displayport.c | 10 +--
 include/drm/drm_connector.h              |  6 +-
 19 files changed, 88 insertions(+), 221 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.c
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_hpd.h

-- 
2.35.1