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,
bcm-kernel-feedback-list@broadcom.com,
Boris Brezillon <bbrezillon@kernel.org>,
Emma Anholt <emma@anholt.net>, Maxime Ripard <mripard@kernel.org>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
Phil Elwell <phil@raspberrypi.com>,
Tim Gover <tim.gover@raspberrypi.com>,
Dom Cobley <dom@raspberrypi.com>,
linux-rpi-kernel@lists.infradead.org
Subject: [PATCH 0/4] drm/vc4: hdmi: Fix CEC access while disabled
Date: Tue, 29 Jun 2021 14:57:32 +0200 [thread overview]
Message-ID: <20210629125736.414467-1-maxime@cerno.tech> (raw)
Hi,
This series aims at fixing a complete and silent hang when one tries to use CEC
while the display output is off.
This can be tested with:
echo off > /sys/class/drm/card0-HDMI-A-1/status
cec-ctl --tuner -p 1.0.0.0
cec-compliance
This series addresses it by making sure the HDMI controller is powered up as
soon as the CEC device is opened by the userspace.
Let me know what you think,
Maxime
Maxime Ripard (4):
drm/vc4: hdmi: Mark the device as active if running
drm/vc4: hdmi: Put the device on error in pre_crtc_configure
drm/vc4: hdmi: Split the CEC disable / enable functions in two
drm/vc4: hdmi: Make sure the device is powered with CEC
drivers/gpu/drm/vc4/vc4_hdmi.c | 85 ++++++++++++++++++++++------------
1 file changed, 55 insertions(+), 30 deletions(-)
--
2.31.1
next reply other threads:[~2021-06-29 12:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-29 12:57 Maxime Ripard [this message]
2021-06-29 12:57 ` [PATCH 1/4] drm/vc4: hdmi: Mark the device as active if running Maxime Ripard
2021-06-29 12:57 ` [PATCH 2/4] drm/vc4: hdmi: Put the device on error in pre_crtc_configure Maxime Ripard
2021-06-29 12:57 ` [PATCH 3/4] drm/vc4: hdmi: Split the CEC disable / enable functions in two Maxime Ripard
2021-06-29 12:57 ` [PATCH 4/4] drm/vc4: hdmi: Make sure the device is powered with CEC Maxime Ripard
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