From patchwork Tue May 28 08:27:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 10964129 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A05726C5 for ; Tue, 28 May 2019 08:28:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 92049286A8 for ; Tue, 28 May 2019 08:28:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 864C9286BD; Tue, 28 May 2019 08:28:19 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED 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 29BC2286A8 for ; Tue, 28 May 2019 08:28:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F360689C80; Tue, 28 May 2019 08:28:16 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from lelv0142.ext.ti.com (lelv0142.ext.ti.com [198.47.23.249]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8C4BE89C6C for ; Tue, 28 May 2019 08:28:15 +0000 (UTC) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x4S8SBrx031725; Tue, 28 May 2019 03:28:11 -0500 Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x4S8SBif114485 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 28 May 2019 03:28:11 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Tue, 28 May 2019 03:28:09 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Tue, 28 May 2019 03:28:09 -0500 Received: from deskari.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x4S8RxuX125039; Tue, 28 May 2019 03:28:07 -0500 From: Tomi Valkeinen To: , Andrzej Hajda , Laurent Pinchart , Lucas Stach , Andrey Gusakov , Philipp Zabel , Andrey Smirnov , Peter Ujfalusi , Jyri Sarha , Benoit Parrot Subject: [PATCHv4 03/24] drm/bridge: tc358767: fix ansi 8b10b use Date: Tue, 28 May 2019 11:27:26 +0300 Message-ID: <20190528082747.3631-4-tomi.valkeinen@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190528082747.3631-1-tomi.valkeinen@ti.com> References: <20190528082747.3631-1-tomi.valkeinen@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1559032091; bh=01vlQ9vCZK2Vfub0eQ745iqI/5NB12jv2APDmow4cKY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=uQv5QP4Gd7lpHe5EXxiPb8zxG2Mw3DQM4cvFAhrHdyrWlJ/Jp6myM1RuuvQNvVJ1K 94JRtI721QzjLSKQpFW7vflKQ1tUdWM9xAX9KpGvFslfdHEkHh0G60Dq3/iemLBmg9 Ezlgbg6qGQj+pFJUh2iom69ESZEXuzYtZNxFeYz0= 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: , Cc: Tomi Valkeinen Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP DP always uses ANSI 8B10B encoding. Some monitors (old?) may not have the ANSI 8B10B bit set in DPCD, even if it should always be set. The tc358767 driver currently respects that flag, and turns the encoding off if the monitor does not have the bit set, which then results in the monitor not working. This patch makes the driver to always use ANSI 8B10B encoding, and drops the 'coding8b10b' field which is no longer used. Signed-off-by: Tomi Valkeinen Reviewed-by: Andrzej Hajda --- drivers/gpu/drm/bridge/tc358767.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index c8b04f711db3..33e27dc2f0b4 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -188,7 +188,6 @@ struct tc_edp_link { u8 assr; int scrambler_dis; int spread; - int coding8b10b; u8 swing; u8 preemp; }; @@ -390,13 +389,10 @@ static u32 tc_srcctrl(struct tc_data *tc) * No training pattern, skew lane 1 data by two LSCLK cycles with * respect to lane 0 data, AutoCorrect Mode = 0 */ - u32 reg = DP0_SRCCTRL_NOTP | DP0_SRCCTRL_LANESKEW; + u32 reg = DP0_SRCCTRL_NOTP | DP0_SRCCTRL_LANESKEW | DP0_SRCCTRL_EN810B; if (tc->link.scrambler_dis) reg |= DP0_SRCCTRL_SCRMBLDIS; /* Scrambler Disabled */ - if (tc->link.coding8b10b) - /* Enable 8/10B Encoder (TxData[19:16] not used) */ - reg |= DP0_SRCCTRL_EN810B; if (tc->link.spread) reg |= DP0_SRCCTRL_SSCG; /* Spread Spectrum Enable */ if (tc->link.base.num_lanes == 2) @@ -635,7 +631,7 @@ static int tc_get_display_props(struct tc_data *tc) ret = drm_dp_dpcd_readb(&tc->aux, DP_MAIN_LINK_CHANNEL_CODING, tmp); if (ret < 0) goto err_dpcd_read; - tc->link.coding8b10b = tmp[0] & BIT(0); + tc->link.scrambler_dis = 0; /* read assr */ ret = drm_dp_dpcd_readb(&tc->aux, DP_EDP_CONFIGURATION_SET, tmp); @@ -649,7 +645,6 @@ static int tc_get_display_props(struct tc_data *tc) tc->link.base.num_lanes, (tc->link.base.capabilities & DP_LINK_CAP_ENHANCED_FRAMING) ? "enhanced" : "non-enhanced"); - dev_dbg(tc->dev, "ANSI 8B/10B: %d\n", tc->link.coding8b10b); dev_dbg(tc->dev, "Display ASSR: %d, TC358767 ASSR: %d\n", tc->link.assr, tc->assr); @@ -951,7 +946,7 @@ static int tc_main_link_setup(struct tc_data *tc) /* DOWNSPREAD_CTRL */ tmp[0] = tc->link.spread ? DP_SPREAD_AMP_0_5 : 0x00; /* MAIN_LINK_CHANNEL_CODING_SET */ - tmp[1] = tc->link.coding8b10b ? DP_SET_ANSI_8B10B : 0x00; + tmp[1] = DP_SET_ANSI_8B10B; ret = drm_dp_dpcd_write(aux, DP_DOWNSPREAD_CTRL, tmp, 2); if (ret < 0) goto err_dpcd_write;