linux-kernel - [PATCH 0/5] drm: dw-hdmi: update CEC phys addr, EDID and ELD on HPD event

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Date:   Sun, 1 Sep 2019 16:13:02 +0000
From:   Jonas Karlman <jonas@...boo.se>
To:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Sean Paul <sean@...rly.run>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Hans Verkuil <hverkuil@...all.nl>,
        Jerome Brunet <jbrunet@...libre.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jonas Karlman <jonas@...boo.se>
Subject: [PATCH 0/5] drm: dw-hdmi: update CEC phys addr, EDID and ELD on HPD
 event

This series change dw-hdmi to update CEC phys addr, EDID and ELD on HPD event,
this fixes lost CEC phys addr and stale EDID/ELD when HDMI cable is
unplugged/replugged or AVR is powered on/off.

Patch 1 and 2 extracts code into a dw_hdmi_connector_update_edid() helper
and moves dw_hdmi_connector_detect() to be able to call this helper.

Patch 3 moves CEC phys addr invalidation from dw_hdmi_irq() to
dw_hdmi_connector_detect() and ensure connector EDID property gets updated.
I opted to not use cec_notifier_mutex after the move, please advise.

Patch 4 and 5 ensures ELD gets updated allowing userspace to query the latest
capabilities when a AVR is powered on and EDID gets updated.
This reverts a previous change to make drm_edid_to_eld() static, please advise.

Next step after this would be to add support for signaling
SNDRV_CTL_EVENT_MASK_VALUE to userspace when ELD changes.

Regards,
Jonas

Jonas Karlman (5):
  drm: dw-hdmi: extract dw_hdmi_connector_update_edid()
  drm: dw-hdmi: move dw_hdmi_connector_detect()
  drm: dw-hdmi: update CEC phys addr and EDID on HPD event
  Revert "drm/edid: make drm_edid_to_eld() static"
  drm: dw-hdmi: update ELD on HPD event

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 57 ++++++++++++++---------
 drivers/gpu/drm/drm_edid.c                |  5 +-
 include/drm/drm_edid.h                    |  1 +
 3 files changed, 38 insertions(+), 25 deletions(-)

-- 
2.17.1