From patchwork Mon Jun 22 17:18:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 209342 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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,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 0A6A4C433E0 for ; Mon, 22 Jun 2020 17:16:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE53020767 for ; Mon, 22 Jun 2020 17:16:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729920AbgFVRQU (ORCPT ); Mon, 22 Jun 2020 13:16:20 -0400 Received: from relay7-d.mail.gandi.net ([217.70.183.200]:34167 "EHLO relay7-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729850AbgFVRQT (ORCPT ); Mon, 22 Jun 2020 13:16:19 -0400 X-Originating-IP: 93.34.118.233 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id 62D3F20007; Mon, 22 Jun 2020 17:16:14 +0000 (UTC) From: Jacopo Mondi To: lolivei@synopsys.com, mchehab@kernel.org, sakari.ailus@linux.intel.com, hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, roman.kovalivskyi@globallogic.com, dave.stevenson@raspberrypi.org, naush@raspberrypi.com Cc: Jacopo Mondi , mrodin@de.adit-jv.com, hugues.fruchet@st.com, mripard@kernel.org, aford173@gmail.com, sudipi@jp.adit-jv.com, andrew_gabbasov@mentor.com, erosca@de.adit-jv.com, linux-media@vger.kernel.org, libcamera-devel@lists.libcamera.org Subject: [PATCH 04/25] media: ov5647: Add support for non-continuous clock mode Date: Mon, 22 Jun 2020 19:18:49 +0200 Message-Id: <20200622171910.608894-5-jacopo@jmondi.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200622171910.608894-1-jacopo@jmondi.org> References: <20200622171910.608894-1-jacopo@jmondi.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dave Stevenson Add support for optional non-continuous clock mode to the ov5647 sensor driver. Non-continuous clock saves a small amount of power and on some SoCs is easier to interface with. Signed-off-by: Dave Stevenson Signed-off-by: Roman Kovalivskyi Signed-off-by: Jacopo Mondi --- drivers/media/i2c/ov5647.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c index 105ff7f899b34..2d69cd97142d7 100644 --- a/drivers/media/i2c/ov5647.c +++ b/drivers/media/i2c/ov5647.c @@ -44,6 +44,7 @@ #define PWDN_ACTIVE_DELAY_MS 20 #define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5) +#define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4) #define MIPI_CTRL00_BUS_IDLE BIT(2) #define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0) @@ -95,6 +96,7 @@ struct ov5647 { int power_count; struct clk *xclk; struct gpio_desc *pwdn; + bool clock_ncont; }; static inline struct ov5647 *to_state(struct v4l2_subdev *sd) @@ -269,9 +271,15 @@ static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel) static int ov5647_stream_on(struct v4l2_subdev *sd) { + struct ov5647 *ov5647 = to_state(sd); + u8 val = MIPI_CTRL00_BUS_IDLE; int ret; - ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, MIPI_CTRL00_BUS_IDLE); + if (ov5647->clock_ncont) + val |= MIPI_CTRL00_CLOCK_LANE_GATE | + MIPI_CTRL00_LINE_SYNC_ENABLE; + + ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val); if (ret < 0) return ret; @@ -546,9 +554,11 @@ static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = { .open = ov5647_open, }; -static int ov5647_parse_dt(struct device_node *np) +static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np) { - struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 }; + struct v4l2_fwnode_endpoint bus_cfg = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; struct device_node *ep; int ret; @@ -558,7 +568,13 @@ static int ov5647_parse_dt(struct device_node *np) return -EINVAL; ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg); + if (ret) + goto out; + sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags & + V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK; + +out: of_node_put(ep); return ret; } @@ -577,7 +593,7 @@ static int ov5647_probe(struct i2c_client *client) return -ENOMEM; if (IS_ENABLED(CONFIG_OF) && np) { - ret = ov5647_parse_dt(np); + ret = ov5647_parse_dt(sensor, np); if (ret) { dev_err(dev, "DT parsing error: %d\n", ret); return ret;