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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY autolearn=unavailable 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 9D821C43381 for ; Tue, 19 Feb 2019 01:53:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6E51A217D9 for ; Tue, 19 Feb 2019 01:53:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="SOa6i1D7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E51A217D9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Date:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oKkCsyclZg/B2rgFUg0JLaZjJxbJxdFedb7Vw15opuo=; b=SOa6i1D79ZHl0+ JDePyLEoDeu9fkj/66yVUOYws3QWdBkhJ660+wd92qvdDye1Tb/Zq8GSZdwI++NZaG5nepl4Gh/2s HiTSu6gJeucGmydnV3UnvBpZu89SQzJid/jZzdRx09dsl6fpEbf5pbno4tKSFY168ZlgzpZTefban i82iZMJPLJu4R4zTwIZznX6q9RKtDi2YmtXfHBlIk3vXOrx5r/f3Z7PnaOD56D04+bSh0OCgnX5Gf Ne+ovmd+RxKj86lwpLQBCt5F6TA/awnYMvmMtbDHGcj3w4pZjH/rjp1pQxRNXc9EyeoHwovdVHKXj qZODcn8wMQZTGhQfRctA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gvubD-0002m6-EJ; Tue, 19 Feb 2019 01:53:31 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gvub9-0002lG-CX; Tue, 19 Feb 2019 01:53:29 +0000 X-UUID: 1190827bdcfe47288d88b08c9b8c5fbb-20190218 X-UUID: 1190827bdcfe47288d88b08c9b8c5fbb-20190218 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 693473250; Mon, 18 Feb 2019 17:53:15 -0800 Received: from MTKMBS01N1.mediatek.inc (172.21.101.68) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 18 Feb 2019 17:53:14 -0800 Received: from MTKCAS32.mediatek.inc (172.27.4.184) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 19 Feb 2019 09:53:12 +0800 Received: from [10.16.6.141] (10.16.6.141) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 19 Feb 2019 09:53:10 +0800 Message-ID: <1550541190.13121.2.camel@mszsdaap41> Subject: Re: [PATCH] drm/mediatek: add mt8183 dpi support From: Jitao Shi To: CK Hu Date: Tue, 19 Feb 2019 09:53:10 +0800 In-Reply-To: <1550160809.6862.13.camel@mtksdaap41> References: <20190211045059.11821-1-jitao.shi@mediatek.com> <1550160809.6862.13.camel@mtksdaap41> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190218_175327_434655_1EEE63A4 X-CRM114-Status: GOOD ( 17.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, David Airlie , stonea168@163.com, dri-devel@lists.freedesktop.org, yingjoe.chen@mediatek.com, Ajay Kumar , Vincent Palatin , cawa.cheng@mediatek.com, bibby.hsieh@mediatek.com, Russell King , Thierry Reding , linux-pwm@vger.kernel.org, Sascha Hauer , Pawel Moll , Ian Campbell , Inki Dae , Rob Herring , linux-mediatek@lists.infradead.org, Andy Yan , Matthias Brugger , eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org, Rahul Sharma , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Philipp Zabel , Kumar Gala , Sean Paul Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 2019-02-15 at 00:13 +0800, CK Hu wrote: > Hi, Jitao: > > On Mon, 2019-02-11 at 12:50 +0800, Jitao Shi wrote: > > MT8183 sample on rising and falling edge. It can reduce half data io. > > > > Signed-off-by: Jitao Shi > > --- > > drivers/gpu/drm/mediatek/mtk_dpi.c | 29 +++++++++++++++++++++++++++++ > > 1 file changed, 29 insertions(+) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c > > index 62a9d47df948..610c23334047 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c > > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c > > @@ -117,6 +117,7 @@ struct mtk_dpi_conf { > > unsigned int (*cal_factor)(int clock); > > u32 reg_h_fre_con; > > bool edge_sel_en; > > + bool dual_edge; > > }; > > > > static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask) > > @@ -353,6 +354,13 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi) > > mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN); > > } > > > > +static void mtk_dpi_enable_dual_edge(struct mtk_dpi *dpi) > > +{ > > + mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, > > + DDR_EN | DDR_4PHASE); > > + mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, EDGE_SEL, EDGE_SEL); > > +} > > All these register exist in MT8173, if you do the same setting in > MT8173, could it also sample on rising edge and falling edge? > > Regards, > CK Hi CK, MT8173 has those registers. But the hw function is removed. So MT8173 doesn't support DPI dual edge sample. Best Regards Jitao > > > + > > static void mtk_dpi_config_color_format(struct mtk_dpi *dpi, > > enum mtk_dpi_out_color_format format) > > { > > @@ -509,6 +517,8 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, > > mtk_dpi_config_color_format(dpi, dpi->color_format); > > mtk_dpi_config_2n_h_fre(dpi); > > mtk_dpi_config_disable_edge(dpi); > > + if (dpi->conf->dual_edge) > > + mtk_dpi_enable_dual_edge(dpi); > > mtk_dpi_sw_reset(dpi, false); > > > > return 0; > > @@ -671,6 +681,16 @@ static unsigned int mt2701_calculate_factor(int clock) > > return 2; > > } > > > > +static unsigned int mt8183_calculate_factor(int clock) > > +{ > > + if (clock <= 27000) > > + return 8; > > + else if (clock <= 167000) > > + return 4; > > + else > > + return 2; > > +} > > + > > static const struct mtk_dpi_conf mt8173_conf = { > > .cal_factor = mt8173_calculate_factor, > > .reg_h_fre_con = 0xe0, > > @@ -682,6 +702,12 @@ static const struct mtk_dpi_conf mt2701_conf = { > > .edge_sel_en = true, > > }; > > > > +static const struct mtk_dpi_conf mt8183_conf = { > > + .cal_factor = mt8183_calculate_factor, > > + .reg_h_fre_con = 0xe0, > > + .dual_edge = true, > > +}; > > + > > static int mtk_dpi_probe(struct platform_device *pdev) > > { > > struct device *dev = &pdev->dev; > > @@ -777,6 +803,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = { > > { .compatible = "mediatek,mt8173-dpi", > > .data = &mt8173_conf, > > }, > > + { .compatible = "mediatek,mt8183-dpi", > > + .data = &mt8183_conf, > > + }, > > { }, > > }; > > > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel