Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967654AbeAOR1R (ORCPT + 1 other); Mon, 15 Jan 2018 12:27:17 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:57524 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966489AbeAORRD (ORCPT ); Mon, 15 Jan 2018 12:17:03 -0500 From: Thierry Escande To: Archit Taneja , Inki Dae , Thierry Reding , Sandy Huang , Sean Paul , David Airlie Cc: Tomasz Figa , Haixia Shi , =?UTF-8?q?=C3=98rjan=20Eide?= , zain wang , Yakir Yang , Lin Huang , Douglas Anderson , Mark Yao , linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org Subject: [PATCH 15/40] drm/bridge: analogix_dp: Don't use fast link training when panel just powered up Date: Mon, 15 Jan 2018 18:15:49 +0100 Message-Id: <20180115171614.14474-16-thierry.escande@collabora.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180115171614.14474-1-thierry.escande@collabora.com> References: <20180115171614.14474-1-thierry.escande@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Type: text/plain; charset = "utf-8" Content-Transfert-Encoding: 8bit Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: 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 --- 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 8ef9e31c6713..179c2106b8a2 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, @@ -1198,6 +1198,7 @@ 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; -- 2.14.1