From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B96D41076374 for ; Wed, 1 Apr 2026 06:12:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2956A10EC3C; Wed, 1 Apr 2026 06:12:51 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=mediatek.com header.i=@mediatek.com header.b="r7LMFFwo"; dkim-atps=neutral Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5A74510EC3C for ; Wed, 1 Apr 2026 06:12:49 +0000 (UTC) X-UUID: caea3e462d9111f19a16598d5ca7f8ec-20260401 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=2W14g40vqxna88foZFfsDI/an1hpSc2sZgoHE3Dhm/0=; b=r7LMFFwoZbYg1nBnVhoTIOKmmqNq91f6VF/rSCRbOXnXtiJ4IXpIXYRKrT73+SXE9awog/iGGw58jV3ivWOBPY5wZdHvqWzeWimh6FaGbw4bGem8wLDM9hz93yHWkPNaWZeQQNXCSrkOJrdT3GuC8dnvI94e7s3BrOyZoPgUSmM=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12, REQID:60da354d-eeaa-436a-a70c-e3453edb1a46, IP:0, U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:e7bac3a, CLOUDID:c1c15fd5-060f-4ecc-9ee0-121eeeb4a682, B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102|836|888|898,TC:-5,Content:0|15|5 0,EDM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0,OSA :0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: caea3e462d9111f19a16598d5ca7f8ec-20260401 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 110947584; Wed, 01 Apr 2026 14:12:42 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Wed, 1 Apr 2026 14:12:41 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Wed, 1 Apr 2026 14:12:41 +0800 From: Morris Pan To: , , CC: , , , , , , , , , Morris Pan Subject: [PATCH] drm/virtgpu: Add PM support for suspend/resume Date: Wed, 1 Apr 2026 14:10:50 +0800 Message-ID: <20260401061050.1035881-1-morris.pan@mediatek.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-MTK: N X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add freeze/restore callbacks to handle system suspend/resume. During freeze, delete virtqueues and reset device. During restore, reinitialize virtqueues and mark device ready. Signed-off-by: Morris Pan --- drivers/gpu/drm/virtio/virtgpu_drv.c | 40 +++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index a5ce96fb8a1d..fbca0a82958c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -145,6 +145,40 @@ static void virtio_gpu_config_changed(struct virtio_device *vdev) schedule_work(&vgdev->config_changed_work); } +#ifdef CONFIG_PM_SLEEP +static int virtgpu_freeze(struct virtio_device *vdev) +{ + vdev->config->del_vqs(vdev); + virtio_reset_device(vdev); + + return 0; +} + +static int virtgpu_restore(struct virtio_device *vdev) +{ + int ret; + struct virtqueue *vqs[2]; + struct drm_device *dev = vdev->priv; + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtqueue_info vqs_info[] = { + { "control", virtio_gpu_ctrl_ack }, + { "cursor", virtio_gpu_cursor_ack }, + }; + + ret = virtio_find_vqs(vdev, 2, vqs, vqs_info, NULL); + if (ret) { + DRM_ERROR("failed to find virtio queues\n"); + return ret; + } + + vgdev->ctrlq.vq = vqs[0]; + vgdev->cursorq.vq = vqs[1]; + virtio_device_ready(vdev); + + return 0; +} +#endif + static struct virtio_device_id id_table[] = { { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID }, { 0 }, @@ -172,7 +206,11 @@ static struct virtio_driver virtio_gpu_driver = { .probe = virtio_gpu_probe, .remove = virtio_gpu_remove, .shutdown = virtio_gpu_shutdown, - .config_changed = virtio_gpu_config_changed + .config_changed = virtio_gpu_config_changed, +#ifdef CONFIG_PM_SLEEP + .freeze = virtgpu_freeze, + .restore = virtgpu_restore +#endif }; static int __init virtio_gpu_driver_init(void) -- 2.45.2