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From:   Maxime Ripard <maxime@cerno.tech>
To:     dri-devel@lists.freedesktop.org,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Maxime Ripard <maxime@cerno.tech>
Cc:     linux-kernel@vger.kernel.org,
        Dave Stevenson <dave.stevenson@raspberrypi.com>,
        Phil Elwell <phil@raspberrypi.com>,
        Tim Gover <tim.gover@raspberrypi.com>,
        Dom Cobley <dom@raspberrypi.com>,
        Boris Brezillon <bbrezillon@kernel.org>,
        linux-rpi-kernel@lists.infradead.org,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        bcm-kernel-feedback-list@broadcom.com,
        Emma Anholt <emma@anholt.net>,
        Nicolas Saenz Julienne <nsaenz@kernel.org>,
        Maxime Ripard <mripard@kernel.org>
Subject: [PATCH v3 0/6] drm/vc4: hdmi: Fix CEC access while disabled
Date:   Thu, 19 Aug 2021 15:59:25 +0200
Message-Id: <20210819135931.895976-1-maxime@cerno.tech>
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Hi,=0D
=0D
This series aims at fixing a complete and silent hang when one tries to use=
 CEC=0D
while the display output is off.=0D
=0D
This can be tested with:=0D
=0D
echo off > /sys/class/drm/card0-HDMI-A-1/status=0D
cec-ctl --tuner -p 1.0.0.0=0D
cec-compliance=0D
=0D
This series addresses it by making sure the HDMI controller is powered up a=
s=0D
soon as the CEC device is opened by the userspace.=0D
=0D
Let me know what you think,=0D
Maxime=0D
=0D
Changes from v2:=0D
  - Rebased on top of drm-misc-fixes=0D
  - Fixed a build error=0D
=0D
Changes from v1:=0D
  - More fixes=0D
  - Added a big warning if we try to access a register while the device is=
=0D
    disabled.=0D
  - Fixed the pre_crtc_configure error path=0D
=0D
Maxime Ripard (6):=0D
  drm/vc4: select PM=0D
  drm/vc4: hdmi: Make sure the controller is powered up during bind=0D
  drm/vc4: hdmi: Rework the pre_crtc_configure error handling=0D
  drm/vc4: hdmi: Split the CEC disable / enable functions in two=0D
  drm/vc4: hdmi: Make sure the device is powered with CEC=0D
  drm/vc4: hdmi: Warn if we access the controller while disabled=0D
=0D
 drivers/gpu/drm/vc4/Kconfig         |   1 +=0D
 drivers/gpu/drm/vc4/vc4_hdmi.c      | 125 ++++++++++++++++++----------=0D
 drivers/gpu/drm/vc4/vc4_hdmi_regs.h |   6 ++=0D
 3 files changed, 90 insertions(+), 42 deletions(-)=0D
=0D
-- =0D
2.31.1=0D
=0D