From nobody Fri Jun 19 07:51:44 2026 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) (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 62BF12472AE for ; Fri, 24 Apr 2026 08:57:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777021062; cv=none; b=GJniwCwBKUJ9ockJdurLp+KUm/Md5WTesoODANSJ+6D9HMHaZIhNzQ0JyDobpZoqLpl0Efuvn75jTBSLZCMHY3qr+leyVU7YIcgZJncJx1Ck4DeHUK0h99q+Mnz5+JFVbEdND+RKdh3M1u5hwFzq5E/7WhxT4xfhZ3yrR0ctcY4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777021062; c=relaxed/simple; bh=sTUCeNnhzZv2WDolnhjrCV7Faa2zl7bbhLbaPbo2YcU=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Jz0l/mPm8ywDz1X71stx29h/cNfcPJvdPkjoLz5tNa8f5nvgUtlq48D/VHWZidBh0KbKZOoC6RkBpeiQESjlTPQqKvAIPLVp+cWxpdXBq0aDjlJUUTwUVOfI6ugfZyOAWd+GvuJx3jt2ji+Vr0QcxjZIZWCIqc0xIOM50q3cobg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=pkQlAK6u; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="pkQlAK6u" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=HE ncDlacW1KFgp1ByKKU3NHffsLFHgb3iR9i3NU75fE=; b=pkQlAK6unBDO8KI2aX bLYrtv7TQ2LfczK4otto653Fr2bSYWPvOW5yCaV0M6atY66671swXvpNJYNPBV5Q KPT2qG2/0bgFSm58rypc7Wtr+CfT+wSggVWy0uds9SfQlTRLc+YOmhBTtPpN5XlJ 62bR8F7Nfj8wefF612CyaXU6o= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wAH06JMMOtpdnwKBg--.18904S2; Fri, 24 Apr 2026 16:56:45 +0800 (CST) From: oushixiong1025@163.com To: Dave Airlie Cc: Sean Paul , Thomas Zimmermann , Maarten Lankhorst , Maxime Ripard , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Shixiong Ou Subject: [PATCH v2 RESEND] drm/udl: Increase GET_URB_TIMEOUT Date: Fri, 24 Apr 2026 16:56:43 +0800 Message-Id: <20260424085643.559968-1-oushixiong1025@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wAH06JMMOtpdnwKBg--.18904S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7WFyUtrWDtr4rAFW3Gw1xZrb_yoW8Zw15pF srA3yjyr4rAF4Dta17tFWvya43Aa13GFZ7GrZ7Ga93u3WqyFn8JrykAryYgFy8X3sxCF1a qFs2vr909FW5Ar7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07UP3kNUUUUU= X-CM-SenderInfo: xrxvxxx0lr0wirqskqqrwthudrp/xtbC4Q50g2nrME6f-QAA3G Content-Type: text/plain; charset="utf-8" From: Shixiong Ou [WHY] A situation has occurred where udl_handle_damage() executed successfully and the kernel log appears normal, but the display fails to show any output. This is because the call to udl_get_urb() in udl_crtc_helper_atomic_enable() failed without generating any error message. [HOW] 1. Increase GET_URB_TIMEOUT. 2. Add error messages when calling udl_get_urb() failed in udl_crtc_helper_atomic_enable(). Signed-off-by: Shixiong Ou Reviewed-by: Thomas Zimmermann --- drivers/gpu/drm/udl/udl_main.c | 2 +- drivers/gpu/drm/udl/udl_modeset.c | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index bc58991a6f14..dd9576fd4ff0 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -285,7 +285,7 @@ static struct urb *udl_get_urb_locked(struct udl_device= *udl, long timeout) return unode->urb; } =20 -#define GET_URB_TIMEOUT HZ +#define GET_URB_TIMEOUT (HZ * 2) struct urb *udl_get_urb(struct udl_device *udl) { struct urb *urb; diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_mo= deset.c index 231e829bd709..2df5bd291b0a 100644 --- a/drivers/gpu/drm/udl/udl_modeset.c +++ b/drivers/gpu/drm/udl/udl_modeset.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include =20 @@ -342,8 +343,10 @@ static void udl_crtc_helper_atomic_enable(struct drm_c= rtc *crtc, struct drm_atom return; =20 urb =3D udl_get_urb(udl); - if (!urb) + if (!urb) { + drm_err_ratelimited(dev, "Get urb failed when enabling crtc\n"); goto out; + } =20 buf =3D (char *)urb->transfer_buffer; buf =3D udl_vidreg_lock(buf); --=20 2.25.1