From patchwork Mon Feb 15 11:11:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 8313391 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E58D99F6E4 for ; Mon, 15 Feb 2016 11:23:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 134B52042B for ; Mon, 15 Feb 2016 11:23:19 +0000 (UTC) Received: from bombadil.infradead.org (unknown [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1E7EA20416 for ; Mon, 15 Feb 2016 11:23:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aVH68-0002EZ-IA; Mon, 15 Feb 2016 11:13:44 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aVH48-0000TG-Sa; Mon, 15 Feb 2016 11:11:45 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.190]) by lucky1.263xmail.com (Postfix) with SMTP id D5B841E8A5C; Mon, 15 Feb 2016 19:11:15 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 8F176299AC; Mon, 15 Feb 2016 19:11:06 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: inki.dae@samsung.com X-SENDER-IP: 103.29.142.67 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [103.29.142.67]) by smtp.263.net (Postfix) whith ESMTP id 30861R1LY1R; Mon, 15 Feb 2016 19:11:12 +0800 (CST) From: Yakir Yang To: Inki Dae , Andrzej Hajda , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Jingoo Han , Thierry Reding , Krzysztof Kozlowski , Rob Herring , Heiko Stuebner , Mark Yao Subject: [PATCH v14 12/17] drm: bridge: analogix/dp: add max link rate and lane count limit for RK3288 Date: Mon, 15 Feb 2016 19:11:05 +0800 Message-Id: <1455534665-2012-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1455534485-1154-1-git-send-email-ykk@rock-chips.com> References: <1455534485-1154-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160215_031141_506599_364B9145 X-CRM114-Status: GOOD ( 11.68 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Russell King , Pawel Moll , Ian Campbell , linux-rockchip@lists.infradead.org, Yakir Yang , emil.l.velikov@gmail.com, linux-kernel@vger.kernel.org, djkurtz@chromium.org, Kishon Vijay Abraham I , javier@osg.samsung.com, Kukjin Kim , Sean Paul , dri-devel@lists.freedesktop.org, Kumar Gala , ajaynumb@gmail.com, robherring2@gmail.com, Andy Yan , Gustavo Padovan , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RDNS_NONE,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There are some IP limit on rk3288 that only support 4 physical lanes of 2.7/1.6 Gbps/lane, so seprate them out by device_type flag. Signed-off-by: Yakir Yang Tested-by: Javier Martinez Canillas --- Changes in v14: None Changes in v13: None Changes in v12: None Changes in v11: None Changes in v10: - Remove the surplus "plat_data" check. (Heiko) - switch (dp->plat_data && dp->plat_data->dev_type) { + switch (dp->plat_data->dev_type) { Changes in v9: None Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: - Seprate the link-rate and lane-count limit out with the device_type flag. (Thierry) Changes in v3: None Changes in v2: None drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 33 ++++++++++++++-------- drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 +-- 2 files changed, 23 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 26359f4..a62e8d0 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -893,8 +893,8 @@ static void analogix_dp_commit(struct analogix_dp_device *dp) return; } - ret = analogix_dp_set_link_train(dp, dp->video_info.lane_count, - dp->video_info.link_rate); + ret = analogix_dp_set_link_train(dp, dp->video_info.max_lane_count, + dp->video_info.max_link_rate); if (ret) { dev_err(dp->dev, "unable to do link train\n"); return; @@ -1203,16 +1203,25 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp) struct device_node *dp_node = dp->dev->of_node; struct video_info *video_info = &dp->video_info; - if (of_property_read_u32(dp_node, "samsung,link-rate", - &video_info->link_rate)) { - dev_err(dp->dev, "failed to get link-rate\n"); - return -EINVAL; - } - - if (of_property_read_u32(dp_node, "samsung,lane-count", - &video_info->lane_count)) { - dev_err(dp->dev, "failed to get lane-count\n"); - return -EINVAL; + switch (dp->plat_data->dev_type) { + case RK3288_DP: + /* + * Like Rk3288 DisplayPort TRM indicate that "Main link + * containing 4 physical lanes of 2.7/1.62 Gbps/lane". + */ + video_info->max_link_rate = 0x0A; + video_info->max_lane_count = 0x04; + break; + case EXYNOS_DP: + /* + * NOTE: those property parseing code is used for + * providing backward compatibility for samsung platform. + */ + of_property_read_u32(dp_node, "samsung,link-rate", + &video_info->max_link_rate); + of_property_read_u32(dp_node, "samsung,lane-count", + &video_info->max_lane_count); + break; } return 0; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 123030f..02c0ecf 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -123,8 +123,8 @@ struct video_info { enum color_coefficient ycbcr_coeff; enum color_depth color_depth; - int link_rate; - enum link_lane_count_type lane_count; + int max_link_rate; + enum link_lane_count_type max_lane_count; }; struct link_train {