From patchwork Mon Apr 23 10:49:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10356615 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 DE90D60225 for ; Mon, 23 Apr 2018 10:50:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D03D028A3A for ; Mon, 23 Apr 2018 10:50:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C47C228A5A; Mon, 23 Apr 2018 10:50:29 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 155FA28A3A for ; Mon, 23 Apr 2018 10:50:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754861AbeDWKu1 (ORCPT ); Mon, 23 Apr 2018 06:50:27 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:38514 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754078AbeDWKuX (ORCPT ); Mon, 23 Apr 2018 06:50:23 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id AC0AC277B9A 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 Cc: dri-devel@lists.freedesktop.org, dianders@chromium.org, a.hajda@samsung.com, kernel@collabora.com, m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org, jy0922.shim@samsung.com, rydberg@bitmath.org, krzk@kernel.org, linux-rockchip@lists.infradead.org, kgene@kernel.org, orjan.eide@arm.com, wxt@rock-chips.com, jeffy.chen@rock-chips.com, linux-arm-kernel@lists.infradead.org, wzz@rock-chips.com, hl@rock-chips.com, jingoohan1@gmail.com, sw0312.kim@samsung.com, linux-kernel@vger.kernel.org, kyungmin.park@samsung.com, Laurent.pinchart@ideasonboard.com, kuankuan.y@gmail.com, hshi@chromium.org, =?UTF-8?q?St=C3=A9phane=20Marchesin?= , Enric Balletbo i Serra Subject: [RESEND PATCH v6 03/27] drm/bridge: analogix_dp: Don't use fast link training when panel just powered up Date: Mon, 23 Apr 2018 12:49:39 +0200 Message-Id: <20180423105003.9004-4-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180423105003.9004-1-enric.balletbo@collabora.com> References: <20180423105003.9004-1-enric.balletbo@collabora.com> MIME-Version: 1.0 Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: zain wang Panel would reset its setting when it powers down. It would forget the last succeeded link training setting. So we can't use the last successful link training setting to do fast link training. Let's reset fast_train_enable in analogix_dp_bridge_disable(); Cc: Stéphane Marchesin Signed-off-by: zain wang Signed-off-by: Sean Paul Signed-off-by: Thierry Escande Signed-off-by: Enric Balletbo i Serra Tested-by: Marek Szyprowski Reviewed-by: Archit Taneja --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 9 +++++---- drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 2 +- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 05a0ca4af057..85dbb1ca9886 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -579,14 +579,14 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) if (retval != 1) { dev_err(dp->dev, "failed to read downspread %d\n", retval); - dp->fast_train_support = false; + dp->fast_train_enable = false; } else { - dp->fast_train_support = + dp->fast_train_enable = (spread & DP_NO_AUX_HANDSHAKE_LINK_TRAINING) ? true : false; } dev_dbg(dp->dev, "fast link training %s\n", - dp->fast_train_support ? "supported" : "unsupported"); + dp->fast_train_enable ? "supported" : "unsupported"); /* set enhanced mode if available */ analogix_dp_set_enhanced_mode(dp); @@ -793,7 +793,7 @@ static int analogix_dp_fast_link_train(struct analogix_dp_device *dp) static int analogix_dp_train_link(struct analogix_dp_device *dp) { - if (dp->fast_train_support) + if (dp->fast_train_enable) return analogix_dp_fast_link_train(dp); return analogix_dp_full_link_train(dp, dp->video_info.max_lane_count, @@ -1197,6 +1197,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge) DRM_ERROR("failed to setup the panel ret = %d\n", ret); dp->psr_enable = false; + dp->fast_train_enable = false; dp->dpms_mode = DRM_MODE_DPMS_OFF; } diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 6a96ef7e6934..403ff853464b 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -173,7 +173,7 @@ struct analogix_dp_device { int hpd_gpio; bool force_hpd; bool psr_enable; - bool fast_train_support; + bool fast_train_enable; struct mutex panel_lock; bool panel_is_modeset;