From patchwork Wed Apr 15 01:13:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jitao Shi X-Patchwork-Id: 11489549 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1D64A913 for ; Wed, 15 Apr 2020 01:13:42 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 E040F20787 for ; Wed, 15 Apr 2020 01:13:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="u9F4vImH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E040F20787 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1662A6E808; Wed, 15 Apr 2020 01:13:38 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailgw01.mediatek.com (unknown [1.203.163.78]) by gabe.freedesktop.org (Postfix) with ESMTP id 2CBBF6E802 for ; Wed, 15 Apr 2020 01:13:30 +0000 (UTC) X-UUID: 6b2547368f62461696c9d15b020bfc5c-20200415 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=jaJQuh8fvp6T9Be9ipJU3hsADftSb0W/4ALoBtZp+2k=; b=u9F4vImHJ9YxND0bBd3lhYXXSUqIqcZYHsgEpM7eimTaJzH11WJmQV60u5CG16ZWgVkexXX8qzJXu/jJWbS/o9NHld0dJkAwCyc2Jb+pI8egfiDJUspn9NmY0qU/bJujeb1Ux2CsW8fp+D9o+Rva87PtPdVt+JKlrqRHhYJeCIs=; X-UUID: 6b2547368f62461696c9d15b020bfc5c-20200415 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 1741448416; Wed, 15 Apr 2020 09:13:26 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS33N2.mediatek.inc (172.27.4.76) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 15 Apr 2020 09:13:26 +0800 Received: from mszsdaap41.gcn.mediatek.inc (10.16.6.141) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 15 Apr 2020 09:13:23 +0800 From: Jitao Shi To: Rob Herring , Mark Rutland , Matthias Brugger , Daniel Vetter , David Airlie , , Subject: [PATCH v15 3/3] drm/mediatek: set dpi pin mode to gpio low to avoid leakage current Date: Wed, 15 Apr 2020 09:13:19 +0800 Message-ID: <20200415011319.25559-4-jitao.shi@mediatek.com> X-Mailer: git-send-email 2.12.5 In-Reply-To: <20200415011319.25559-1-jitao.shi@mediatek.com> References: <20200415011319.25559-1-jitao.shi@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: C3AD1FEB0857C1B01CAC2862F68CBFD9E7616DEFBCFC35987262C8A2BEE0528C2000:8 X-MTK: N X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Jitao Shi , srv_heupstream@mediatek.com, huijuan.xie@mediatek.com, stonea168@163.com, cawa.cheng@mediatek.com, linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com, eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Config dpi pins mode to output and pull low when dpi is disabled. Aovid leakage current from some dpi pins (Hsync Vsync DE ... ). Reviewed-by: Chun-Kuang Hu Signed-off-by: Jitao Shi --- drivers/gpu/drm/mediatek/mtk_dpi.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index 087f5ce732e1..1e01254788d9 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -10,7 +10,9 @@ #include #include #include +#include #include +#include #include #include @@ -74,6 +76,9 @@ struct mtk_dpi { enum mtk_dpi_out_yc_map yc_map; enum mtk_dpi_out_bit_num bit_num; enum mtk_dpi_out_channel_swap channel_swap; + struct pinctrl *pinctrl; + struct pinctrl_state *pins_gpio; + struct pinctrl_state *pins_dpi; int refcount; }; @@ -379,6 +384,9 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi) if (--dpi->refcount != 0) return; + if (dpi->pinctrl && dpi->pins_gpio) + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); + mtk_dpi_disable(dpi); clk_disable_unprepare(dpi->pixel_clk); clk_disable_unprepare(dpi->engine_clk); @@ -403,6 +411,9 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi) goto err_pixel; } + if (dpi->pinctrl && dpi->pins_dpi) + pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); + mtk_dpi_enable(dpi); return 0; @@ -705,6 +716,26 @@ static int mtk_dpi_probe(struct platform_device *pdev) dpi->dev = dev; dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev); + dpi->pinctrl = devm_pinctrl_get(&pdev->dev); + if (IS_ERR(dpi->pinctrl)) { + dpi->pinctrl = NULL; + dev_dbg(&pdev->dev, "Cannot find pinctrl!\n"); + } + if (dpi->pinctrl) { + dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep"); + if (IS_ERR(dpi->pins_gpio)) { + dpi->pins_gpio = NULL; + dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n"); + } + if (dpi->pins_gpio) + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); + + dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default"); + if (IS_ERR(dpi->pins_dpi)) { + dpi->pins_dpi = NULL; + dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n"); + } + } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); dpi->regs = devm_ioremap_resource(dev, mem); if (IS_ERR(dpi->regs)) {