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: 6967981 Return-Path: X-Original-To: patchwork-linux-samsung-soc@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 54368C05AC for ; Fri, 7 Aug 2015 10:56:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1D9032068A for ; Fri, 7 Aug 2015 10:56:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3CBDB2067A for ; Fri, 7 Aug 2015 10:56:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751978AbbHGK4W (ORCPT ); Fri, 7 Aug 2015 06:56:22 -0400 Received: from regular1.263xmail.com ([211.150.99.137]:39803 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751958AbbHGK4U (ORCPT ); Fri, 7 Aug 2015 06:56:20 -0400 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 Cc: djkurtz@google.com, dianders@google.com, seanpaul@google.com, joe@perches.com, Takashi Iwai , Andrzej Hajda , Thierry Reding , Philipp Zabel , David Airlie , Gustavo Padovan , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Kukjin Kim , Ajay Kumar , Joonyoung Shim , Vincent Palatin , Mark Yao , Andy Yan , ajaynumb@gmail.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Yakir Yang 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> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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); } /*