From patchwork Mon Feb 5 19:38:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 10201637 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6B769602CA for ; Mon, 5 Feb 2018 19:39:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5AEE52875A for ; Mon, 5 Feb 2018 19:39:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4DD09287DA; Mon, 5 Feb 2018 19:39:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 115292875A for ; Mon, 5 Feb 2018 19:39:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0771E6E2EA; Mon, 5 Feb 2018 19:39:15 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-qk0-x242.google.com (mail-qk0-x242.google.com [IPv6:2607:f8b0:400d:c09::242]) by gabe.freedesktop.org (Postfix) with ESMTPS id 883CF6E2EA for ; Mon, 5 Feb 2018 19:39:13 +0000 (UTC) Received: by mail-qk0-x242.google.com with SMTP id a5so34091900qkg.10 for ; Mon, 05 Feb 2018 11:39:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references; bh=WDnczaoSp7RRmwBrx+8gz4+aRZxzbjZpN3qBPwgAy/g=; b=dZ279gqjz/aVuJZgu4tNuYfvYaur8Egp5FgwDc6w5IR7SJODjH5v7eYehuW0ADTQZa V4uw3BgIIqcmqwBM/JzgFn4j9594Uz5yHqTP0f/b97vOqyImLxnCOcfKvO8pOGuCMYcA jUrfc6PKLibSlOckLZDym1arUe6f3TS3cB5vrT6ztyPGQphzPbwIsW4knBKdjDPlS3c8 jdYfKzTnqm873KEHBMtvoX1d31A0Vi18tmaM+86uY8uGq8xzv2EIzPawpOxuwX7O1XeR +aWbwUmth5Jtsu8Ql4hTTTUCd33hsxWEsHxogY8mEiWo13UUWjgLrDHe+y5mNclq1MQ2 vokQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=WDnczaoSp7RRmwBrx+8gz4+aRZxzbjZpN3qBPwgAy/g=; b=Mw/042Cc03hiYfh+F0bHUh8nzMBk8knmZ6iAQY/D53s+MQma6V9A75DBSDGw3Yrct0 vPY1XvXVnFm/mM0QfNx/d9pfTD+jtOOt2TLyWSW8txBPs9Lib4nThZ+ID5C2Nz7Y1PSh P0G6Fh0e6NRt9q5U1u0Idbg8fRCJcQKFjBXvifMeXQ7C2ih5fsmyKMNKKbI28ZyiwW6f UYvYPh7qTBlMjE7B8O8XMQtm+g/NnkM0vutMZUYuU8/zL9u6J47mP1fK4mHlbMExEkO0 c85N84T6oQT8s67rO5mOZooqzDZAfb7TXXXmsCHK00jcE7VMXbVtkxLs9/EOKB6PrFt3 /+yA== X-Gm-Message-State: AKwxyteWYxaX5FjySbWT5NIRB7+D+QYlA2TjY0cwPllzQ99hb+ZgZSa5 3NCEaQTey5orTUCZX+GCk/03yg== X-Google-Smtp-Source: AH8x227yZD4xR6SlsDLMbLkrrtUfT2VcnwbBsQB3UavlLnmoxw3DXXAD+lCvrZCHGXJgXR8Faldnfg== X-Received: by 10.55.94.4 with SMTP id s4mr77524218qkb.156.1517859552523; Mon, 05 Feb 2018 11:39:12 -0800 (PST) Received: from localhost (p200300E41F41B00009B231EAB1BE76D4.dip0.t-ipconnect.de. [2003:e4:1f41:b000:9b2:31ea:b1be:76d4]) by smtp.gmail.com with ESMTPSA id j6sm2336457qke.11.2018.02.05.11.39.11 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 05 Feb 2018 11:39:12 -0800 (PST) From: Thierry Reding To: dri-devel@lists.freedesktop.org Subject: [PATCH 16/17] drm/dp: Enable alternate scrambler reset when supported Date: Mon, 5 Feb 2018 20:38:26 +0100 Message-Id: <20180205193827.20374-17-thierry.reding@gmail.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180205193827.20374-1-thierry.reding@gmail.com> References: <20180205193827.20374-1-thierry.reding@gmail.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Thierry Reding If the sink is eDP and supports the alternate scrambler reset, enable it. Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_dp_helper.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 828dc091b015..c8b18c0161d7 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -546,6 +546,13 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link) if (err < 0) return err; + if (link->caps.alternate_scrambler_reset) { + err = drm_dp_dpcd_writeb(aux, DP_EDP_CONFIGURATION_SET, + DP_ALTERNATE_SCRAMBLER_RESET_ENABLE); + if (err < 0) + return err; + } + return 0; } EXPORT_SYMBOL(drm_dp_link_configure);