From nobody Fri Apr 3 04:52:59 2026 Received: from sender4-pp-g124.zoho.com (sender4-pp-g124.zoho.com [136.143.188.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5412E29898B for ; Tue, 17 Feb 2026 19:01:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.124 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771354878; cv=pass; b=k8rkRTrp7W6p8rtTVR+Z+9Rw1SGrVuG10ZdLOm4lv78O/vc/QZR0htzafTBt6qDVCy1+JyBfkhvHDAv4l28tuIjUETSL+cKb8N2/lOoMX+yBhW6oPDerZuVarBStNVLq6cxWIH7UjcybOsnjYX+/VdjG0+KF5PQymqSMdmcsHSU= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771354878; c=relaxed/simple; bh=Ln6m9AAbIYGQwZFbpNb9NG1HAVpudxN+zAE6vNAgyI4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=mWYdfSdP18M7n+6SY9FxfoPwSChzeOLFhl//Ea7AeznnuGK8demmSzp2LZiexjbs4+hQdGZEeWSHWOrcYKB3hqDSePmRIV2coRphi1kOQPrq369zazIV9C+Ep3DCqhGBqlZ1fYodm/jVfW8okZreJKzRogtb/ki86aG6y962Q44= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=nicolas.frattaroli@collabora.com header.b=fsZfTCEN; arc=pass smtp.client-ip=136.143.188.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=nicolas.frattaroli@collabora.com header.b="fsZfTCEN" ARC-Seal: i=1; a=rsa-sha256; t=1771354856; cv=none; d=zohomail.com; s=zohoarc; b=l3ZHZSLmx6nemgYDe4yIG3Tk0f2od/tGCpeMB0z7+mdY4GpTRrvxNBl+rJ6lroBEvYIrcEy9+VknHumQ8qO/Yv9aoD7cPavDEB/tBKd/2SeEpz67wtl3qF2zvyzw5d1KwpL487U68sUIqtHPV8A08k0B0vI9iNQryXu0vqf95I8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1771354856; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=/d0BRo433OI/KcFL3NEdQN9ck7d6byNdXS2fhxmuxJ8=; b=M+zjik/w47L1RCqsGSUwD7P/XEHF+CaRtRTC1xM3gxeIb71OPW+TQIEfm6zakB1gIyovybBI8pDDHueLL0xVxk8NRW3tFzV1Q2s8TqA91hIHltNaJ4a13aDi+CeM0ZLhV4D0S7rapVk+uPMU+D1iEaZdCrBoDmAO0EYGZkOR+Sk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=nicolas.frattaroli@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1771354856; s=zohomail; d=collabora.com; i=nicolas.frattaroli@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:References:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=/d0BRo433OI/KcFL3NEdQN9ck7d6byNdXS2fhxmuxJ8=; b=fsZfTCENji5PFVGwv4xZTsaklIYXRoxSuY94vf+twCICwbUDiESFmAsiyLokO/Av tYmCEunrLe0V1IlhlT/D3i+oDRv1QGfpMoKN060vtYZdhQ3vyCztoL3TKk/4oaSWkZq LXk2IlF2u2+DqxtPrmR8KtbSetc8cKkmWNV6SDHE= Received: by mx.zohomail.com with SMTPS id 1771354854023702.6782797187954; Tue, 17 Feb 2026 11:00:54 -0800 (PST) From: Nicolas Frattaroli Date: Tue, 17 Feb 2026 20:00:23 +0100 Subject: [PATCH v7 1/2] drm: Introduce pending_hp to drm_connector Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260217-hot-plug-passup-v7-1-f8221b2aab51@collabora.com> References: <20260217-hot-plug-passup-v7-0-f8221b2aab51@collabora.com> In-Reply-To: <20260217-hot-plug-passup-v7-0-f8221b2aab51@collabora.com> To: =?utf-8?q?Ville_Syrj=C3=A4l=C3=A4?= , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Louis Chauvet , Haneen Mohammed , Melissa Wen , Daniel Stone , Ian Forbes , Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Nicolas Frattaroli , Marius Vlad X-Mailer: b4 0.14.3 From: Marius Vlad Introduce a new boolean variable used to track whether a connector has changed its status since the last hotplug event for it was sent to userspace. It is used by both the polling and HPD path. A subsequent change will make use of this new member to propagate per-connector udev hotplug events to userspace, rather than sending a global hotplug event. Signed-off-by: Marius Vlad Signed-off-by: Nicolas Frattaroli --- drivers/gpu/drm/drm_connector.c | 1 + drivers/gpu/drm/drm_probe_helper.c | 17 +++++++++++++++++ drivers/gpu/drm/drm_sysfs.c | 2 ++ include/drm/drm_connector.h | 3 +++ 4 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connecto= r.c index aec05adbc889..67497d0e41f1 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -274,6 +274,7 @@ static int drm_connector_init_only(struct drm_device *d= ev, =20 /* provide ddc symlink in sysfs */ connector->ddc =3D ddc; + connector->pending_hp =3D false; =20 INIT_LIST_HEAD(&connector->head); INIT_LIST_HEAD(&connector->global_connector_list_entry); diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe= _helper.c index d4dc8cb45bce..f8cbd6713960 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -732,6 +732,17 @@ EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); */ void drm_kms_helper_hotplug_event(struct drm_device *dev) { + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + + mutex_lock(&dev->mode_config.mutex); + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + connector->pending_hp =3D false; + } + drm_connector_list_iter_end(&conn_iter); + mutex_unlock(&dev->mode_config.mutex); + drm_sysfs_hotplug_event(dev); drm_client_dev_hotplug(dev); } @@ -748,6 +759,10 @@ void drm_kms_helper_connector_hotplug_event(struct drm= _connector *connector) { struct drm_device *dev =3D connector->dev; =20 + mutex_lock(&dev->mode_config.mutex); + connector->pending_hp =3D false; + mutex_unlock(&dev->mode_config.mutex); + drm_sysfs_connector_hotplug_event(connector); drm_client_dev_hotplug(dev); } @@ -837,6 +852,7 @@ static void output_poll_execute(struct work_struct *wor= k) old_epoch_counter, connector->epoch_counter); =20 changed =3D true; + connector->pending_hp =3D true; } } drm_connector_list_iter_end(&conn_iter); @@ -1101,6 +1117,7 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) first_changed_connector =3D connector; } =20 + connector->pending_hp =3D true; changed++; } } diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index b01ffa4d6509..53076c2afd12 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -216,6 +216,8 @@ static ssize_t status_store(struct device *device, connector->base.id, connector->name, old_force, connector->force); =20 + connector->pending_hp =3D true; + connector->funcs->fill_modes(connector, dev->mode_config.max_width, dev->mode_config.max_height); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index c18be8c19de0..cd9787c54425 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -2191,6 +2191,9 @@ struct drm_connector { /** @force: a DRM_FORCE_ state for forced mode sets */ enum drm_connector_force force; =20 + /** @pending_hp: true if connector changed since last hotplug event */ + bool pending_hp; 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Tue, 17 Feb 2026 11:00:59 -0800 (PST) From: Nicolas Frattaroli Date: Tue, 17 Feb 2026 20:00:24 +0100 Subject: [PATCH v7 2/2] drm: Send per-connector hotplug events Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260217-hot-plug-passup-v7-2-f8221b2aab51@collabora.com> References: <20260217-hot-plug-passup-v7-0-f8221b2aab51@collabora.com> In-Reply-To: <20260217-hot-plug-passup-v7-0-f8221b2aab51@collabora.com> To: =?utf-8?q?Ville_Syrj=C3=A4l=C3=A4?= , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Louis Chauvet , Haneen Mohammed , Melissa Wen , Daniel Stone , Ian Forbes , Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Nicolas Frattaroli , Marius Vlad X-Mailer: b4 0.14.3 From: Marius Vlad Use the new pending_hp member of drm_connector to always send per-connector hotplug events for those connectors that need it, rather than sending a global event, or only an event for one connector. On the HPD (Hot Plug Detect) path this change notifies all connectors, rather than just first changed connector. The polling path is changed to no longer send a connector-less hotplug event, but similarly send a hotplug event for each changed connector. Signed-off-by: Marius Vlad Signed-off-by: Nicolas Frattaroli --- drivers/gpu/drm/drm_probe_helper.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe= _helper.c index f8cbd6713960..5c39f27ada1d 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -860,8 +860,14 @@ static void output_poll_execute(struct work_struct *wo= rk) mutex_unlock(&dev->mode_config.mutex); =20 out: - if (changed) - drm_kms_helper_hotplug_event(dev); + if (changed) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->pending_hp) + drm_kms_helper_connector_hotplug_event(connector); + } + drm_connector_list_iter_end(&conn_iter); + } =20 if (repoll) schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); @@ -1124,10 +1130,16 @@ bool drm_helper_hpd_irq_event(struct drm_device *de= v) drm_connector_list_iter_end(&conn_iter); mutex_unlock(&dev->mode_config.mutex); =20 - if (changed =3D=3D 1) + if (changed =3D=3D 1) { drm_kms_helper_connector_hotplug_event(first_changed_connector); - else if (changed > 0) - drm_kms_helper_hotplug_event(dev); + } else if (changed > 0) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->pending_hp) + drm_kms_helper_connector_hotplug_event(connector); + } + drm_connector_list_iter_end(&conn_iter); + } =20 if (first_changed_connector) drm_connector_put(first_changed_connector); --=20 2.53.0