From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 842F0C433DF for ; Wed, 26 Aug 2020 07:26:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61D892071E for ; Wed, 26 Aug 2020 07:26:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="lCGvvJtx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726750AbgHZH0o (ORCPT ); Wed, 26 Aug 2020 03:26:44 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:46282 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726749AbgHZH0o (ORCPT ); Wed, 26 Aug 2020 03:26:44 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 07Q7QQAw044714; Wed, 26 Aug 2020 02:26:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1598426786; bh=5vsDR7X3Aq0aAuUV19I1BIwRlagOD/K58mwMuCDkt0E=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=lCGvvJtxFVazQGWve4gNBURcEZ5nWoiF6ggO3eDngkMnX1hUBgxMjNb5gWj41zWKE pL2EdCy1IgBudhs3JeKeSV/y5W/GUZRt1DpAlGDBuJPo+9faRrD6JbUHtI5wVToSOS 9P1K6J3J3if+bYFYtPjDdlv7CFcguw1s0B4/UPKE= Received: from DLEE112.ent.ti.com (dlee112.ent.ti.com [157.170.170.23]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 07Q7QQGK022517 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 26 Aug 2020 02:26:26 -0500 Received: from DLEE108.ent.ti.com (157.170.170.38) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 26 Aug 2020 02:26:26 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 26 Aug 2020 02:26:26 -0500 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 07Q7QMK8115741; Wed, 26 Aug 2020 02:26:23 -0500 Subject: Re: [PATCH v8 2/3] drm: bridge: Add support for Cadence MHDP DPI/DP bridge To: Laurent Pinchart , Swapnil Jakhade CC: , , , , , , , , , , , , , , References: <1596713672-8146-1-git-send-email-sjakhade@cadence.com> <1596713672-8146-3-git-send-email-sjakhade@cadence.com> <20200811023622.GC13513@pendragon.ideasonboard.com> From: Tomi Valkeinen Message-ID: <0a6e7550-67ca-c72f-7c3a-1ed4586381a7@ti.com> Date: Wed, 26 Aug 2020 10:26:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200811023622.GC13513@pendragon.ideasonboard.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi, On 11/08/2020 05:36, Laurent Pinchart wrote: >> +{ >> + u32 max_bw, req_bw, bpp; >> + >> + bpp = cdns_mhdp_get_bpp(&mhdp->display_fmt); >> + req_bw = mode->clock * bpp / 8; >> + max_bw = lanes * rate; > mode->clock is in kHz, while rate is expressed in 10kHz unit if I'm not > mistaken. Rate is in 10 kbps units. And 10 bits in DP gives you one byte (8b/10b encoding). So max_bw is in kBps, the same as req_bw. Tomi -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki