Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755559AbbHFOc3 (ORCPT ); Thu, 6 Aug 2015 10:32:29 -0400 Received: from regular2.263xmail.com ([211.157.152.4]:55105 "EHLO regular2.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753890AbbHFOc2 (ORCPT ); Thu, 6 Aug 2015 10:32:28 -0400 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 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: <0a4b52c715237848581c7b743fdc814e> X-DNS-TYPE: 0 From: Yakir Yang To: Heiko Stuebner , Russell King , Fabio Estevam , Jingoo Han , Inki Dae Cc: djkurtz@google.com, dianders@google.com, Takashi Iwai , Andrzej Hajda , Yakir Yang , 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 , 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 Subject: [RFC PATCH 8/8] drm: bridge/analogix_dp: expand the delay time for hpd detect Date: Thu, 6 Aug 2015 09:26:33 -0500 Message-Id: <1438871193-24067-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1438868947-22132-1-git-send-email-ykk@rock-chips.com> References: <1438868947-22132-1-git-send-email-ykk@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1021 Lines: 32 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 --- 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 7e67f19..447c94d 100644 --- a/drivers/gpu/drm/bridge/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix_dp_core.c @@ -73,7 +73,7 @@ static int analogix_dp_detect_hpd(struct analogix_dp_device *dp) return 0; timeout_loop++; - usleep_range(10, 11); + usleep_range(100, 110); } /* -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/