From: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
To: Andrzej Hajda <andrzej.hajda@intel.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Robert Foss <rfoss@kernel.org>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
Sam Ravnborg <sam@ravnborg.org>,
Sebastian Reichel <sebastian.reichel@collabora.com>,
Yongxing Mou <yongxing.mou@oss.qualcomm.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] drm/bridge: display-connector: detect DP state if cable is plugged on boot
Date: Sat, 14 Mar 2026 02:43:10 +0200 [thread overview]
Message-ID: <20260314-dp-connector-hpd-v1-0-786044cedc17@oss.qualcomm.com> (raw)
Unlike the USB-C AltMode handling and unlike the DP controller handling
the HPD on its own, if the display-connector is being used to handle the
HPD pin, DP controller might not be able to get either the HPD
notification nor detect the cable state if the cable is plugged in
before the system has booted.
Make the display-connector send the HPD notifications during system
startup for DisplayPort connectors.
It's typically not a problem for other types of display connectors since
there is no special procedure to detect if the monitor is actually
plugged in or not.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
Dmitry Baryshkov (2):
drm/bridge: display-connector: don't autoenable HPD IRQ
drm/bridge: display-connector: trigger initial HPD event for DP
drivers/gpu/drm/bridge/display-connector.c | 36 ++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
---
base-commit: 5c9e55fecf9365890c64f14761a80f9413a3b1d1
change-id: 20260314-dp-connector-hpd-f069e66bc6af
Best regards,
--
With best wishes
Dmitry
next reply other threads:[~2026-03-14 0:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-14 0:43 Dmitry Baryshkov [this message]
2026-03-14 0:43 ` [PATCH 1/2] drm/bridge: display-connector: don't autoenable HPD IRQ Dmitry Baryshkov
2026-03-16 2:14 ` Claude review: " Claude Code Review Bot
2026-03-14 0:43 ` [PATCH 2/2] drm/bridge: display-connector: trigger initial HPD event for DP Dmitry Baryshkov
2026-03-16 2:14 ` Claude review: " Claude Code Review Bot
2026-03-16 2:14 ` Claude review: drm/bridge: display-connector: detect DP state if cable is plugged on boot Claude Code Review Bot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260314-dp-connector-hpd-v1-0-786044cedc17@oss.qualcomm.com \
--to=dmitry.baryshkov@oss.qualcomm.com \
--cc=Laurent.pinchart@ideasonboard.com \
--cc=airlied@gmail.com \
--cc=andrzej.hajda@intel.com \
--cc=boris.brezillon@collabora.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=jernej.skrabec@gmail.com \
--cc=jonas@kwiboo.se \
--cc=linux-kernel@vger.kernel.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=mripard@kernel.org \
--cc=neil.armstrong@linaro.org \
--cc=rfoss@kernel.org \
--cc=sam@ravnborg.org \
--cc=sebastian.reichel@collabora.com \
--cc=simona@ffwll.ch \
--cc=tomi.valkeinen@ti.com \
--cc=tzimmermann@suse.de \
--cc=yongxing.mou@oss.qualcomm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox