From patchwork Mon Mar 5 22:23:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10260091 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 A190A60365 for ; Mon, 5 Mar 2018 22:24:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 80D3528943 for ; Mon, 5 Mar 2018 22:24:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 74E3B28CC8; Mon, 5 Mar 2018 22:24:48 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E628C28CA7 for ; Mon, 5 Mar 2018 22:24:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=EvrQHM/phaZVfTuJ4geh9MemdEvWFuv7/0dmF57f6p4=; b=rDWcRlGdEamFqB8oF3/y7ZtORn ynehCdaqOuXoHhLpvp2DMTSQNTejlgZg+is+5uDNMtTyaPSjHX6D5NtYCRvP1HMnVFJW57WNf7hs2 g05L+t+Ki5S/b2/TgK6giyH1cjmodGUT0FsIOwIhX/WnqqPsnlxBa2hJUnpcMVTzR+NlxutkFwaPz /wqCkc8Xz5jDqDc11++DiS688Ce8JGFU3igGiNbXqZ50xXBzMwInk3jS9ftBHdDHokCZsyarvcgAz OTUiXVb2K6dLKgnWaMTzJGlBPJzAYkbXeMe+dw2oKw3gozByl5P7x5zhpp52s4lFcu+amzkVdgVel d/UCWx0Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1esyXG-0000RB-1y; Mon, 05 Mar 2018 22:24:46 +0000 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1esyWp-00008b-Ah for linux-rockchip@lists.infradead.org; Mon, 05 Mar 2018 22:24:27 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id D0690273341 From: Enric Balletbo i Serra To: architt@codeaurora.org, inki.dae@samsung.com, thierry.reding@gmail.com, hjc@rock-chips.com, seanpaul@chromium.org, airlied@linux.ie, tfiga@chromium.org, heiko@sntech.de Subject: [PATCH v4 17/38] drm/bridge: analogix_dp: Fix incorrect usage of enhanced mode Date: Mon, 5 Mar 2018 23:23:09 +0100 Message-Id: <20180305222324.5872-18-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180305222324.5872-1-enric.balletbo@collabora.com> References: <20180305222324.5872-1-enric.balletbo@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180305_142420_218343_F8B961DE X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wzz@rock-chips.com, hl@rock-chips.com, dianders@chromium.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Enric Balletbo i Serra , orjan.eide@arm.com, m.szyprowski@samsung.com, hshi@chromium.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: zain wang Enhanced mode is required by the eDP 1.2 specification, and not doing it early could result in a period of time where we have a link transmitting idle packets without it. Since there is no reason to disable it, we just enable it at the beginning of link training and then keep it on all the time. Cc: Tomasz Figa Signed-off-by: zain wang Signed-off-by: Sean Paul Signed-off-by: Thierry Escande Reviewed-by: Andrzej Hajda Signed-off-by: Enric Balletbo i Serra --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 0ff151f741a3..5489570ef010 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -281,6 +281,8 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) retval = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, 2); if (retval < 0) return retval; + /* set enhanced mode if available */ + analogix_dp_set_enhanced_mode(dp); /* Set TX pre-emphasis to minimum */ for (lane = 0; lane < lane_count; lane++) @@ -593,8 +595,6 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) dev_dbg(dp->dev, "fast link training %s\n", dp->fast_train_enable ? "supported" : "unsupported"); - /* set enhanced mode if available */ - analogix_dp_set_enhanced_mode(dp); dp->link_train.lt_state = FINISHED; return 0; @@ -940,8 +940,6 @@ static int analogix_dp_commit(struct analogix_dp_device *dp) } analogix_dp_enable_scramble(dp, 1); - analogix_dp_enable_rx_to_enhanced_mode(dp, 1); - analogix_dp_enable_enhanced_mode(dp, 1); analogix_dp_init_video(dp); ret = analogix_dp_config_video(dp);