From patchwork Wed Aug 7 06:02:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jitao Shi X-Patchwork-Id: 1143273 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 463LXc4gzSz9sNk for ; Wed, 7 Aug 2019 16:03:28 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727018AbfHGGDU (ORCPT ); Wed, 7 Aug 2019 02:03:20 -0400 Received: from Mailgw01.mediatek.com ([1.203.163.78]:50329 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726137AbfHGGDT (ORCPT ); Wed, 7 Aug 2019 02:03:19 -0400 X-UUID: 66379fd288374440afeac1fca168d612-20190807 X-UUID: 66379fd288374440afeac1fca168d612-20190807 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 564144345; Wed, 07 Aug 2019 14:03:11 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS33N1.mediatek.inc (172.27.4.75) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 7 Aug 2019 14:03:09 +0800 Received: from mszsdclx1018.gcn.mediatek.inc (172.27.4.253) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 7 Aug 2019 14:03:07 +0800 From: Jitao Shi To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , , David Airlie , Matthias Brugger CC: Jitao Shi , Thierry Reding , Ajay Kumar , Inki Dae , Rahul Sharma , Sean Paul , Vincent Palatin , Andy Yan , Philipp Zabel , Russell King , , , , , , , Sascha Hauer , , , , , , Subject: [PATCH v5 4/4] drm/mediatek: control dpi pins dpi or gpio mode in on or off Date: Wed, 7 Aug 2019 14:02:57 +0800 Message-ID: <20190807060257.57007-5-jitao.shi@mediatek.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190807060257.57007-1-jitao.shi@mediatek.com> References: <20190807060257.57007-1-jitao.shi@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 1B2CA2D23DF96E5EB5B80F2CCDC9DF7A23B524F7C9EECA1DDDD30165E22A6FB52000:8 X-MTK: N Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org Pull dpi pins low when dpi has nothing to display. Aovid leakage current from some dpi pins (Hsync Vsync DE ... ). Some chips have dpi pins, but there are some chip don't have pins. So this function is controlled by device tree. Signed-off-by: Jitao Shi --- drivers/gpu/drm/mediatek/mtk_dpi.c | 39 +++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index 4f2700cbfdb7..83fb0d753f72 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -9,10 +9,12 @@ #include #include #include -#include #include #include +#include #include +#include +#include #include #include #include @@ -71,8 +73,12 @@ 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; bool dual_edge; + bool dpi_pin_ctrl; }; static inline struct mtk_dpi *mtk_dpi_from_encoder(struct drm_encoder *e) @@ -384,6 +390,9 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi) if (--dpi->refcount != 0) return; + if (dpi->dpi_pin_ctrl) + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); + mtk_dpi_disable(dpi); clk_disable_unprepare(dpi->pixel_clk); clk_disable_unprepare(dpi->engine_clk); @@ -408,6 +417,9 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi) goto err_pixel; } + if (dpi->dpi_pin_ctrl) + pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); + mtk_dpi_enable(dpi); return 0; @@ -713,6 +725,31 @@ 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->dual_edge = of_property_read_bool(dev->of_node, "dpi_dual_edge"); + dpi->dpi_pin_ctrl = of_property_read_bool(dev->of_node, + "dpi_pin_mode_swap"); + + if (dpi->dpi_pin_ctrl) { + dpi->pinctrl = devm_pinctrl_get(&pdev->dev); + if (IS_ERR(dpi->pinctrl)) { + dev_err(&pdev->dev, "Cannot find pinctrl!\n"); + return PTR_ERR(dpi->pinctrl); + } + + dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, + "gpiomode"); + if (IS_ERR(dpi->pins_gpio)) { + dev_err(&pdev->dev, "Cannot find pinctrl gpiomode!\n"); + return PTR_ERR(dpi->pins_gpio); + } + + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); + + dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "dpimode"); + if (IS_ERR(dpi->pins_dpi)) { + dev_err(&pdev->dev, "Cannot find pinctrl dpimode!\n"); + return PTR_ERR(dpi->pins_dpi); + } + } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); dpi->regs = devm_ioremap_resource(dev, mem);