From nobody Sun Apr 19 09:30:48 2026 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (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 37A3935DA42 for ; Wed, 15 Apr 2026 18:00:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776276032; cv=pass; b=QRjqOi1AUTBfXT0m3xCwLN1NyKyKNC8ctQmIRZwM/+ObUX9RrWjRMUTotLDEEliPsl0Q47Atu1zV0UcCUF0CpFlQmGnfnhxrAiReQuacy+JykZ8THcra1N4yKc2hhzM0xputyXsClpMmqcp5zHyswP8KJl6TMh780oDOY52dT/g= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776276032; c=relaxed/simple; bh=lSz/xL2dLt2oD/VJLI9GcNTu5bTMiCpy5rbbe0SXSB0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GBNf/hEsFlW1PIV3XAxeHhTISgmZ/Dm0GGrmGKXD3RyDp6Lbz4YThID3aO0S0o8mr1dSNRrl7col4x95X2PoR/gKoG1hgE87ENeJ9gkMfO5KxWgTWtlixXtnbgaclr5HRGxBkCOVlPP5Evm3uy/F5UduFFK/BBoJ+NoXbUEh95c= 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=dL02vGEU; arc=pass smtp.client-ip=136.143.188.112 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="dL02vGEU" ARC-Seal: i=1; a=rsa-sha256; t=1776276006; cv=none; d=zohomail.com; s=zohoarc; b=isSt4nV2sbA24BLpgxx8aP50mpocM7khHu8gtlwOU1e72MbAH8deM3nsgr+G00xY/M4uGnvyDBQYb/Pg43TxlINBYYQ8GWHw0KiO0R1IEuCe0uEwSGhlewpxi0ugbVshkMz1hjSvljCCTv43lpFyqZm6EgQ3DKzX0tarhAW/vgc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1776276006; 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=CJ9S9SYweRejpCw9A46ovCcBNk/A0W+USSJumRpgMy4=; b=EdIV9KLXIMIcDLKa5LadDDzRJ6LWaakNR9cExDI+TKRCi+Pc1a+vkPNagLFdkI+JvPzSU8byaSSy2AFUVffxb+7pxfBq7tR2xgT6qZu4sXKPEbVV79XF+bOadEn9pjH6Pb2DQsjTtDc4xvpyAuEqn1hwyZcOH/n+lMIxrm80zvE= 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=1776276006; 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=CJ9S9SYweRejpCw9A46ovCcBNk/A0W+USSJumRpgMy4=; b=dL02vGEU8p4jD64v4rpPuLCe5jLaP5fRZ1sFqdK2qp+GXeWV+rS1pjkPkMwFoJdA IS/8orBl/HmNAJ1e74W1GfJDoEenddV4TE+n413/PWTkpkW2uB7qXvLY9hTmXiJfvtc CYeDDLk24KFt5jAr9XUJZQ6/zDoBdbsI2/KsFhBc= Received: by mx.zohomail.com with SMTPS id 1776276004760751.849826698265; Wed, 15 Apr 2026 11:00:04 -0700 (PDT) From: Nicolas Frattaroli Date: Wed, 15 Apr 2026 19:59:39 +0200 Subject: [PATCH RESEND 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: <20260415-hot-plug-passup-v7-1-9a27ef5e2428@collabora.com> References: <20260415-hot-plug-passup-v7-0-9a27ef5e2428@collabora.com> In-Reply-To: <20260415-hot-plug-passup-v7-0-9a27ef5e2428@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, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, wayland-devel@lists.freedesktop.org, Nicolas Frattaroli , Marius Vlad X-Mailer: b4 0.15.2 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 3fa4d2082cd7..b1abdef6778a 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 ef4e923a8728..47a6b322e873 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 3e422a4f2e72..70a740301089 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -2251,6 +2251,9 @@ 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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Wed, 15 Apr 2026 11:00:09 -0700 (PDT) From: Nicolas Frattaroli Date: Wed, 15 Apr 2026 19:59:40 +0200 Subject: [PATCH RESEND 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: <20260415-hot-plug-passup-v7-2-9a27ef5e2428@collabora.com> References: <20260415-hot-plug-passup-v7-0-9a27ef5e2428@collabora.com> In-Reply-To: <20260415-hot-plug-passup-v7-0-9a27ef5e2428@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, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel@collabora.com, wayland-devel@lists.freedesktop.org, Nicolas Frattaroli , Marius Vlad X-Mailer: b4 0.15.2 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