From patchwork Wed Sep 15 12:02:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 12496083 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 30D8FC433EF for ; Wed, 15 Sep 2021 12:03:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 193C961357 for ; Wed, 15 Sep 2021 12:03:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237685AbhIOMEU (ORCPT ); Wed, 15 Sep 2021 08:04:20 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:55154 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237651AbhIOMER (ORCPT ); Wed, 15 Sep 2021 08:04:17 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 18FC2sp5085408; Wed, 15 Sep 2021 07:02:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1631707374; bh=l3ZcaCZppqvViDJsA+qmLFC+hXXiwwkwwQuFXOjal3k=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ZiAeYJ7P6l/HL8h+nF2AGweHXZh6cB0ekQJiHAKmyRWJC6MWBQsIc8nU37YlK1sx+ otus1uTI4o06voeUyvDfU0UISO9s3uamTuE3uDZHtK6KQHkqLkMHZJbwH0k+AxwMY1 X0qwde6bMauQGJ4nBOIy/CdmKmrVjgg2+e9/6rVQ= Received: from DLEE108.ent.ti.com (dlee108.ent.ti.com [157.170.170.38]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 18FC2skP120079 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 15 Sep 2021 07:02:54 -0500 Received: from DLEE109.ent.ti.com (157.170.170.41) 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 15.1.2308.14; Wed, 15 Sep 2021 07:02:53 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Wed, 15 Sep 2021 07:02:53 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 18FC2fD3019246; Wed, 15 Sep 2021 07:02:50 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Pratyush Yadav , Laurent Pinchart , Nikhil Devshatwar , Tomi Valkeinen , Vignesh Raghavendra , Benoit Parrot , Maxime Ripard , Rob Herring , Sakari Ailus , =?utf-8?q?Niklas_S=C3=B6derlun?= =?utf-8?q?d?= , , , Subject: [PATCH v4 02/11] media: cadence: csi2rx: Add external DPHY support Date: Wed, 15 Sep 2021 17:32:31 +0530 Message-ID: <20210915120240.21572-3-p.yadav@ti.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210915120240.21572-1-p.yadav@ti.com> References: <20210915120240.21572-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Some platforms like TI's J721E can have the CSI2RX paired with an external DPHY. Add support to enable and configure the DPHY using the generic PHY framework. Get the pixel rate and bpp from the subdev and pass them on to the DPHY along with the number of lanes. All other settings are left to their default values. Signed-off-by: Pratyush Yadav --- Changes in v4: - Drop the call to set PHY submode. It is now being done via compatible on the DPHY side. Changes in v3: - Use v4l2_get_link_freq() to calculate pixel clock. Changes in v2: - Use phy_pm_runtime_get_sync() and phy_pm_runtime_put() before making calls to set PHY mode, etc. to make sure it is ready. drivers/media/platform/cadence/cdns-csi2rx.c | 143 +++++++++++++++++-- 1 file changed, 133 insertions(+), 10 deletions(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index d60975f905d6..c06e039a1aa8 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -30,6 +30,12 @@ #define CSI2RX_STATIC_CFG_DLANE_MAP(llane, plane) ((plane) << (16 + (llane) * 4)) #define CSI2RX_STATIC_CFG_LANES_MASK GENMASK(11, 8) +#define CSI2RX_DPHY_LANE_CTRL_REG 0x40 +#define CSI2RX_DPHY_CL_RST BIT(16) +#define CSI2RX_DPHY_DL_RST(i) BIT((i) + 12) +#define CSI2RX_DPHY_CL_EN BIT(4) +#define CSI2RX_DPHY_DL_EN(i) BIT(i) + #define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100) #define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000) @@ -54,6 +60,11 @@ enum csi2rx_pads { CSI2RX_PAD_MAX, }; +struct csi2rx_fmt { + u32 code; + u8 bpp; +}; + struct csi2rx_priv { struct device *dev; unsigned int count; @@ -85,6 +96,37 @@ struct csi2rx_priv { int source_pad; }; +static const struct csi2rx_fmt formats[] = { + { + .code = MEDIA_BUS_FMT_YUYV8_2X8, + .bpp = 16, + }, + { + .code = MEDIA_BUS_FMT_UYVY8_2X8, + .bpp = 16, + }, + { + .code = MEDIA_BUS_FMT_YVYU8_2X8, + .bpp = 16, + }, + { + .code = MEDIA_BUS_FMT_VYUY8_2X8, + .bpp = 16, + }, +}; + +static u8 csi2rx_get_bpp(u32 code) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].code == code) + return formats[i].bpp; + } + + return 0; +} + static inline struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev) { @@ -101,6 +143,66 @@ static void csi2rx_reset(struct csi2rx_priv *csi2rx) writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG); } +static int csi2rx_configure_external_dphy(struct csi2rx_priv *csi2rx) +{ + union phy_configure_opts opts = { }; + struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy; + struct v4l2_subdev_format sd_fmt; + s64 pixel_clock; + int ret; + u8 bpp; + bool got_pm = true; + + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; + sd_fmt.pad = 0; + + ret = v4l2_subdev_call(csi2rx->source_subdev, pad, get_fmt, NULL, + &sd_fmt); + if (ret) + return ret; + + bpp = csi2rx_get_bpp(sd_fmt.format.code); + if (!bpp) + return -EINVAL; + + /* + * Do not divide by the number of lanes here. That will be done by + * phy_mipi_dphy_get_default_config(). + */ + pixel_clock = v4l2_get_link_freq(csi2rx->source_subdev->ctrl_handler, + 1, 2); + if (pixel_clock < 0) + return pixel_clock; + + ret = phy_mipi_dphy_get_default_config(pixel_clock, bpp, + csi2rx->num_lanes, cfg); + if (ret) + return ret; + + ret = phy_pm_runtime_get_sync(csi2rx->dphy); + if (ret == -ENOTSUPP) + got_pm = false; + else if (ret) + return ret; + + ret = phy_power_on(csi2rx->dphy); + if (ret) + goto out; + + ret = phy_configure(csi2rx->dphy, &opts); + if (ret) { + /* Can't do anything if it fails. Ignore the return value. */ + phy_power_off(csi2rx->dphy); + goto out; + } + +out: + if (got_pm) + phy_pm_runtime_put(csi2rx->dphy); + + return ret; +} + static int csi2rx_start(struct csi2rx_priv *csi2rx) { unsigned int i; @@ -139,6 +241,17 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) if (ret) goto err_disable_pclk; + /* Enable DPHY clk and data lanes. */ + if (csi2rx->dphy) { + reg = CSI2RX_DPHY_CL_EN | CSI2RX_DPHY_CL_RST; + for (i = 0; i < csi2rx->num_lanes; i++) { + reg |= CSI2RX_DPHY_DL_EN(csi2rx->lanes[i] - 1); + reg |= CSI2RX_DPHY_DL_RST(csi2rx->lanes[i] - 1); + } + + writel(reg, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG); + } + /* * Create a static mapping between the CSI virtual channels * and the output stream. @@ -169,10 +282,21 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) if (ret) goto err_disable_pixclk; + if (csi2rx->dphy) { + ret = csi2rx_configure_external_dphy(csi2rx); + if (ret) { + dev_err(csi2rx->dev, + "Failed to configure external DPHY: %d\n", ret); + goto err_disable_sysclk; + } + } + clk_disable_unprepare(csi2rx->p_clk); return 0; +err_disable_sysclk: + clk_disable_unprepare(csi2rx->sys_clk); err_disable_pixclk: for (; i > 0; i--) clk_disable_unprepare(csi2rx->pixel_clk[i - 1]); @@ -200,6 +324,13 @@ static void csi2rx_stop(struct csi2rx_priv *csi2rx) if (v4l2_subdev_call(csi2rx->source_subdev, video, s_stream, false)) dev_warn(csi2rx->dev, "Couldn't disable our subdev\n"); + + if (csi2rx->dphy) { + writel(0, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG); + + if (phy_power_off(csi2rx->dphy)) + dev_warn(csi2rx->dev, "Couldn't power off DPHY\n"); + } } static int csi2rx_s_stream(struct v4l2_subdev *subdev, int enable) @@ -307,15 +438,6 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx, return PTR_ERR(csi2rx->dphy); } - /* - * FIXME: Once we'll have external D-PHY support, the check - * will need to be removed. - */ - if (csi2rx->dphy) { - dev_err(&pdev->dev, "External D-PHY not supported yet\n"); - return -EINVAL; - } - ret = clk_prepare_enable(csi2rx->p_clk); if (ret) { dev_err(&pdev->dev, "Couldn't prepare and enable P clock\n"); @@ -345,7 +467,7 @@ static int csi2rx_get_resources(struct csi2rx_priv *csi2rx, * FIXME: Once we'll have internal D-PHY support, the check * will need to be removed. */ - if (csi2rx->has_internal_dphy) { + if (!csi2rx->dphy && csi2rx->has_internal_dphy) { dev_err(&pdev->dev, "Internal D-PHY not supported yet\n"); return -EINVAL; } @@ -464,6 +586,7 @@ static int csi2rx_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Probed CSI2RX with %u/%u lanes, %u streams, %s D-PHY\n", csi2rx->num_lanes, csi2rx->max_lanes, csi2rx->max_streams, + csi2rx->dphy ? "external" : csi2rx->has_internal_dphy ? "internal" : "no"); return 0;