From patchwork Wed Dec 16 03:57:37 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 7859721 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 BF315BEEE1 for ; Wed, 16 Dec 2015 04:01:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F0AED202EC for ; Wed, 16 Dec 2015 04:01:13 +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 213A0202D1 for ; Wed, 16 Dec 2015 04:01:13 +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 1a93H6-0001n6-Fv; Wed, 16 Dec 2015 04:01:12 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a93G5-000804-6i; Wed, 16 Dec 2015 04:00:10 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.236]) by lucky1.263xmail.com (Postfix) with SMTP id 59D951E8794; Wed, 16 Dec 2015 11:59:46 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 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 52E5C41F; Wed, 16 Dec 2015 11:59:40 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: inki.dae@samsung.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: 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 9340O81U2; Wed, 16 Dec 2015 11:59:46 +0800 (CST) From: Yakir Yang To: Inki Dae , Mark Yao , Jingoo Han , Heiko Stuebner Subject: [PATCH v11 17/19] drm: bridge: analogix/dp: expand the look time for waiting AUX CH reply Date: Wed, 16 Dec 2015 11:57:37 +0800 Message-Id: <1450238257-3274-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1450236018-1118-1-git-send-email-ykk@rock-chips.com> References: <1450236018-1118-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151215_200009_680117_D9EE2552 X-CRM114-Status: GOOD ( 10.08 ) 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: devicetree@vger.kernel.org, Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, Russell King , linux-rockchip@lists.infradead.org, emil.l.velikov@gmail.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Kishon Vijay Abraham I , javier@osg.samsung.com, Rob Herring , Yakir Yang , Andy Yan , Thierry Reding , Gustavo Padovan , linux-arm-kernel@lists.infradead.org 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=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 After test on rockchiop platform, i found sometims driver would failed at reading EDID message. After debugging more, i found that it's okay to read_a byte from i2c, but it would failed at AUX transcation if we try to ready multi-bytes from i2c. Driver just can't received the AUX CH reply command, even no AUX error code. I may guess that the AUX wait time is not enough, so I try to expand the AUX wait time, and i do see this could fix the EDID read failed at rockchip platform. And I thought that expand the wait time won't hurt Exynos platform too much, cause Exynos didn't have this problem, then driver would received the reply command very soon, so no more additional wait time would bring to Exynos platform. Signed-off-by: Yakir Yang --- Changes in v11: None Changes in v10: None Changes in v9: None Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index c7e2959..dc376bd 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -482,7 +482,7 @@ int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp) reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA); while (!(reg & RPLY_RECEIV)) { timeout_loop++; - if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { + if (DP_TIMEOUT_LOOP_COUNT * 10 < timeout_loop) { dev_err(dp->dev, "AUX CH command reply failed!\n"); return -ETIMEDOUT; }