From patchwork Fri Aug 7 10:54:04 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 6968001 Return-Path: X-Original-To: patchwork-linux-rockchip@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B4BAFC05AC for ; Fri, 7 Aug 2015 10:56:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F05BD2068E for ; Fri, 7 Aug 2015 10:56:53 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2F7192067A for ; Fri, 7 Aug 2015 10:56:52 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZNfKV-0005js-Kd; Fri, 07 Aug 2015 10:56:51 +0000 Received: from regular1.263xmail.com ([211.150.99.137]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZNfKG-0005Oq-GW; Fri, 07 Aug 2015 10:56:39 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.11]) by regular1.263xmail.com (Postfix) with SMTP id 59E787DF0; Fri, 7 Aug 2015 18:56:10 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id CCEE3432; Fri, 7 Aug 2015 18:56:05 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: <984e7f71652873afbe28a6aa969bd9f0> X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 28408RK4KXI; Fri, 07 Aug 2015 18:56:09 +0800 (CST) From: Yakir Yang To: Heiko Stuebner , Russell King , Fabio Estevam , Jingoo Han , Inki Dae Subject: [PATCH v2 8/8] drm: bridge/analogix_dp: expand the delay time for hpd detect Date: Fri, 7 Aug 2015 05:54:04 -0500 Message-Id: <1438944844-19243-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1438943674-18191-1-git-send-email-ykk@rock-chips.com> References: <1438943674-18191-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150807_035638_643083_B90D03F8 X-CRM114-Status: UNSURE ( 6.75 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Krzysztof Kozlowski , seanpaul@google.com, Takashi Iwai , dri-devel@lists.freedesktop.org, Andrzej Hajda , Yakir Yang , Gustavo Padovan , Ajay Kumar , linux-samsung-soc@vger.kernel.org, Vincent Palatin , Joonyoung Shim , linux-rockchip@lists.infradead.org, David Airlie , Kukjin Kim , Thierry Reding , dianders@google.com, joe@perches.com, linux-arm-kernel@lists.infradead.org, Mark Yao , Seung-Woo Kim , linux-kernel@vger.kernel.org, Kyungmin Park , djkurtz@google.com, Philipp Zabel , ajaynumb@gmail.com, Andy Yan MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some edp screen with no hpd signal would need some delay time to ensure that screen would be ready for work, so we can expand the delay time in hpd detect function, it works prefectly on my rk3288 sdk board. Signed-off-by: Yakir Yang --- Changes in v2: None drivers/gpu/drm/bridge/analogix_dp_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix_dp_core.c index efd810c..3ba10fa2 100644 --- a/drivers/gpu/drm/bridge/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix_dp_core.c @@ -71,7 +71,7 @@ static int analogix_dp_detect_hpd(struct analogix_dp_device *dp) return 0; timeout_loop++; - usleep_range(10, 11); + usleep_range(100, 110); } /*