From patchwork Wed Nov 30 00:12:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 630382 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD362C433FE for ; Wed, 30 Nov 2022 00:13:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231285AbiK3ANE (ORCPT ); Tue, 29 Nov 2022 19:13:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231284AbiK3AM6 (ORCPT ); Tue, 29 Nov 2022 19:12:58 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9688D2A958; Tue, 29 Nov 2022 16:12:57 -0800 (PST) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2ATNX0j3025189; Wed, 30 Nov 2022 00:12:51 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=AZ6vt2jKGUOv4azD48DvcGRskVyis4YObWpEOWE6LZg=; b=jOiX8wqYDL04+cW4ilEE43UNFYOo7PwkakWKZbH4OsL9PNXqCFcmEBbncR0WtbFmnxwV dcUzqh4ejBx2adSb89i5JZoYGlELNfmde7E7vf5HU62tE+fJ1Rxx6CuwFYgTmG8an5NY 89g53IMj/jOipJ11cb64wvxiagzEQ0cPqaVFWOpj+9LZ6HTTY/ksecmYQ37QJ4mlS7+m /i4pydSll3XcYCbWPUyoVw1/DxZjilU3Vo8ueYZSGvfAS/qLwISJvBvqwBnfuDis291t llcoEW+HOV++WmiFshsirSh2LvrGe6TniHVy56pOoWS+CJ/dqcZ7pgkCMLSph46Sw0jn Sw== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3m57p7kmry-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Nov 2022 00:12:51 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 2AU0Co32015935 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Nov 2022 00:12:50 GMT Received: from khsieh-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Tue, 29 Nov 2022 16:12:49 -0800 From: Kuogee Hsieh To: , , , , , , , , , , CC: Kuogee Hsieh , , , , , Subject: [PATCH v5 2/3] drm/msm/dp: parser data-lanes and link-frequencies from endpoint node Date: Tue, 29 Nov 2022 16:12:10 -0800 Message-ID: <1669767131-13854-3-git-send-email-quic_khsieh@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1669767131-13854-1-git-send-email-quic_khsieh@quicinc.com> References: <1669767131-13854-1-git-send-email-quic_khsieh@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 3GTTyKFpIAYD2Oc6AbfTBR-xaUDu445m X-Proofpoint-GUID: 3GTTyKFpIAYD2Oc6AbfTBR-xaUDu445m X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-29_13,2022-11-29_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 mlxscore=0 malwarescore=0 phishscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 impostorscore=0 spamscore=0 adultscore=0 clxscore=1011 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211290146 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Both data-lanes and link-frequencies are property of endpoint. This patch parser endpoint to retrieve max data lanes and max link rate supported specified at dp_out endpoint. In the case where no endpoint specified, then 4 data lanes with HBR2 link rate (5.4G) will be the default link configuration. Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_parser.c | 34 ++++++++++++++++++++++++++-------- drivers/gpu/drm/msm/dp/dp_parser.h | 2 ++ 2 files changed, 28 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index dd73221..9367f8c 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -94,16 +94,34 @@ static int dp_parser_ctrl_res(struct dp_parser *parser) static int dp_parser_misc(struct dp_parser *parser) { struct device_node *of_node = parser->pdev->dev.of_node; - int len; - - len = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES); - if (len < 0) { - DRM_WARN("Invalid property \"data-lanes\", default max DP lanes = %d\n", - DP_MAX_NUM_DP_LANES); - len = DP_MAX_NUM_DP_LANES; + struct device_node *endpoint; + int cnt; + u64 frequence[4]; + + endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */ + if (endpoint) { + cnt = of_property_count_u32_elems(endpoint, "data-lanes"); + if (cnt < 0) + parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ + else + parser->max_dp_lanes = cnt; + + cnt = of_property_count_u64_elems(endpoint, "link-frequencies"); + if (cnt < 0) { + parser->max_dp_link_rate = DP_LINK_FREQUENCY_HBR2; /* 54000 khz */ + } else { + if (cnt > 4) /* 4 frequency at most */ + cnt = 4; + of_property_read_u64_array(endpoint, "link-frequencies", frequence, cnt); + parser->max_dp_link_rate = (u32)frequence[cnt -1]; + parser->max_dp_link_rate /= 1000; /* khz */ + } + } else { + /* default */ + parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ + parser->max_dp_link_rate = DP_LINK_FREQUENCY_HBR2; /* 54000 khz */ } - parser->max_dp_lanes = len; return 0; } diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index 866c1a8..76ddb751 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -15,6 +15,7 @@ #define DP_LABEL "MDSS DP DISPLAY" #define DP_MAX_PIXEL_CLK_KHZ 675000 #define DP_MAX_NUM_DP_LANES 4 +#define DP_LINK_FREQUENCY_HBR2 540000 enum dp_pm_type { DP_CORE_PM, @@ -119,6 +120,7 @@ struct dp_parser { struct dp_io io; struct dp_display_data disp_data; u32 max_dp_lanes; + u32 max_dp_link_rate; struct drm_bridge *next_bridge; int (*parse)(struct dp_parser *parser);