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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E53B4C43334 for ; Wed, 29 Jun 2022 04:41:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229977AbiF2Elw (ORCPT ); Wed, 29 Jun 2022 00:41:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229511AbiF2Elu (ORCPT ); Wed, 29 Jun 2022 00:41:50 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D9A82CDF0; Tue, 28 Jun 2022 21:41:49 -0700 (PDT) X-UUID: bfa30ba3cc7345c9989fac580893baa9-20220629 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:0c867c88-9af2-4629-adfd-0035ee76b800,OB:0,LO B:10,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,AC TION:release,TS:45 X-CID-INFO: VERSION:1.1.7,REQID:0c867c88-9af2-4629-adfd-0035ee76b800,OB:0,LOB: 10,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:45 X-CID-META: VersionHash:87442a2,CLOUDID:0b13eb62-0b3f-4b2c-b3a6-ed5c044366a0,C OID:4675debb0dcf,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: bfa30ba3cc7345c9989fac580893baa9-20220629 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 832169266; Wed, 29 Jun 2022 12:41:45 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.186) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Wed, 29 Jun 2022 12:41:43 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 29 Jun 2022 12:41:43 +0800 Message-ID: Subject: Re: [PATCH v12 05/10] drm/mediatek: Add MT8195 Embedded DisplayPort driver From: CK Hu To: Bo-Chen Chen , , , , , , , , , , CC: , , , , , , , , , , , Date: Wed, 29 Jun 2022 12:41:43 +0800 In-Reply-To: <20220627080341.5087-6-rex-bc.chen@mediatek.com> References: <20220627080341.5087-1-rex-bc.chen@mediatek.com> <20220627080341.5087-6-rex-bc.chen@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Bo-Chen: On Mon, 2022-06-27 at 16:03 +0800, Bo-Chen Chen wrote: > From: Markus Schneider-Pargmann > > This patch adds a embedded displayport driver for the MediaTek mt8195 > SoC. > > It supports the MT8195, the embedded DisplayPort units. It offers > DisplayPort 1.4 with up to 4 lanes. > > The driver creates a child device for the phy. The child device will > never exist without the parent being active. As they are sharing a > register range, the parent passes a regmap pointer to the child so > that > both can work with the same register range. The phy driver sets > device > data that is read by the parent to get the phy device that can be > used > to control the phy properties. > > This driver is based on an initial version by > Jitao shi > > Signed-off-by: Markus Schneider-Pargmann > Signed-off-by: Guillaume Ranquet > [Bo-Chen: Cleanup the drivers and modify comments from reviewers] > Signed-off-by: Bo-Chen Chen > --- [snip] > + > +static void mtk_dp_calculate_pixrate(struct mtk_dp *mtk_dp) > +{ > + u8 target_frame_rate = 60; > + u32 target_pixel_clk; > + struct drm_display_mode mode; > + struct mtk_dp_timings *timings = &mtk_dp->info.timings; > + > + drm_display_mode_from_videomode(&timings->vm, &mode); > + > + if (mtk_dp->info.timings.frame_rate > 0) { > + target_frame_rate = mtk_dp->info.timings.frame_rate; > + target_pixel_clk = mode.htotal * mode.vtotal * > + target_frame_rate; target_pixel_clk is not used in other place, so remove it. Regards, CK > + } else { > + target_pixel_clk = mode.htotal * mode.vtotal * > + target_frame_rate; > + } > +} > +