From nobody Sun Nov 9 15:06:02 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1550652600764652.92586059815; Wed, 20 Feb 2019 00:50:00 -0800 (PST) Received: from localhost ([127.0.0.1]:36225 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gwNZc-0006tn-Da for importer@patchew.org; Wed, 20 Feb 2019 03:49:48 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53317) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gwNXx-0005yP-7J for qemu-devel@nongnu.org; Wed, 20 Feb 2019 03:48:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gwNXw-0008NG-12 for qemu-devel@nongnu.org; Wed, 20 Feb 2019 03:48:05 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47156) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gwNXv-0008MZ-Oq for qemu-devel@nongnu.org; Wed, 20 Feb 2019 03:48:03 -0500 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DA0F07BDA9; Wed, 20 Feb 2019 08:48:02 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-228.ams2.redhat.com [10.36.116.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id BE9481001E78; Wed, 20 Feb 2019 08:47:54 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 1DA4C11AB8; Wed, 20 Feb 2019 09:47:54 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Wed, 20 Feb 2019 09:47:53 +0100 Message-Id: <20190220084753.9130-4-kraxel@redhat.com> In-Reply-To: <20190220084753.9130-1-kraxel@redhat.com> References: <20190220084753.9130-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Wed, 20 Feb 2019 08:48:02 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 3/3] vfio/display: delay link up event X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alex Williamson , intel-gvt-dev@lists.freedesktop.org, Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Kick the display link up event with a 0.1 sec delay, so the guest has a chance to notice the link down first. Signed-off-by: Gerd Hoffmann --- include/hw/vfio/vfio-common.h | 1 + hw/vfio/display.c | 26 +++++++++++++++++++++++--- 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 5f7f709b95..b65a2f0518 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -151,6 +151,7 @@ typedef struct VFIODisplay { struct vfio_region_info *edid_info; struct vfio_region_gfx_edid *edid_regs; uint8_t *edid_blob; + QEMUTimer *edid_link_timer; struct { VFIORegion buffer; DisplaySurface *surface; diff --git a/hw/vfio/display.c b/hw/vfio/display.c index 7b9b604a64..361823b23b 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -38,6 +38,21 @@ goto err; =20 =20 +static void vfio_display_edid_link_up(void *opaque) +{ + VFIOPCIDevice *vdev =3D opaque; + VFIODisplay *dpy =3D vdev->dpy; + int fd =3D vdev->vbasedev.fd; + + dpy->edid_regs->link_state =3D VFIO_DEVICE_GFX_LINK_STATE_UP; + pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state); + trace_vfio_display_edid_link_up(); + return; + +err: + trace_vfio_display_edid_write_error(); +} + static void vfio_display_edid_update(VFIOPCIDevice *vdev, bool enabled, int prefx, int prefy) { @@ -50,6 +65,7 @@ static void vfio_display_edid_update(VFIOPCIDevice *vdev,= bool enabled, .prefy =3D prefy ?: vdev->display_yres, }; =20 + timer_del(dpy->edid_link_timer); dpy->edid_regs->link_state =3D VFIO_DEVICE_GFX_LINK_STATE_DOWN; pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state); trace_vfio_display_edid_link_down(); @@ -77,9 +93,8 @@ static void vfio_display_edid_update(VFIOPCIDevice *vdev,= bool enabled, goto err; } =20 - dpy->edid_regs->link_state =3D VFIO_DEVICE_GFX_LINK_STATE_UP; - pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state); - trace_vfio_display_edid_link_up(); + timer_mod(dpy->edid_link_timer, + qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 100); return; =20 err: @@ -140,6 +155,9 @@ static void vfio_display_edid_init(VFIOPCIDevice *vdev) vdev->display_yres =3D dpy->edid_regs->max_yres; } =20 + dpy->edid_link_timer =3D timer_new_ms(QEMU_CLOCK_REALTIME, + vfio_display_edid_link_up, vdev); + vfio_display_edid_update(vdev, true, 0, 0); return; =20 @@ -158,6 +176,8 @@ static void vfio_display_edid_exit(VFIODisplay *dpy) =20 g_free(dpy->edid_regs); g_free(dpy->edid_blob); + timer_del(dpy->edid_link_timer); + timer_free(dpy->edid_link_timer); } =20 static void vfio_display_update_cursor(VFIODMABuf *dmabuf, --=20 2.9.3