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Wed, 7 Jul 2021 05:22:59 -0400 (EDT) From: Maxime Ripard To: dri-devel@lists.freedesktop.org, Daniel Vetter , David Airlie , Maarten Lankhorst , Thomas Zimmermann , Maxime Ripard Cc: Maxime Ripard , Emma Anholt , Dave Stevenson , Boris Brezillon , Phil Elwell , Tim Gover , Dom Cobley , linux-rpi-kernel@lists.infradead.org, Nicolas Saenz Julienne , Hans Verkuil , linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Subject: [PATCH v2 0/5] drm/vc4: hdmi: Fix CEC access while disabled Date: Wed, 7 Jul 2021 11:22:52 +0200 Message-Id: <20210707092257.1465109-1-maxime@cerno.tech> X-Mailer: git-send-email 2.31.1 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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 (5):=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/vc4_hdmi.c | 123 +++++++++++++++++++---------=0D drivers/gpu/drm/vc4/vc4_hdmi_regs.h | 6 ++=0D 2 files changed, 89 insertions(+), 40 deletions(-)=0D =0D -- =0D 2.31.1=0D =0D