From patchwork Sat Jul 9 13:50:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Ford X-Patchwork-Id: 12912205 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B8A0C433EF for ; Sat, 9 Jul 2022 13:51:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229679AbiGINvG (ORCPT ); Sat, 9 Jul 2022 09:51:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229462AbiGINvF (ORCPT ); Sat, 9 Jul 2022 09:51:05 -0400 Received: from mail-io1-xd30.google.com (mail-io1-xd30.google.com [IPv6:2607:f8b0:4864:20::d30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F5CF3CBDF; Sat, 9 Jul 2022 06:51:04 -0700 (PDT) Received: by mail-io1-xd30.google.com with SMTP id n68so1288016iod.3; Sat, 09 Jul 2022 06:51:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QhrFKWsUCK+BEM0aD0PrGGBv2e+dmfgaO+e2DAm5ZiE=; b=O9uPFm51xM7K/hgLWUIW74XZXRNNWTWWThuRBvqm3TbblTxJozdWj9lPD/Qieghg0M uGxAaOO36kyvhqAQ7GY9i4hpwwROU0AwLtZfzveVNiDeSBKIWEd5kpXjWiHSKHICJO3s IM8co9HVRxopSuLnq50DNVK1pOO1hP9caboruKR7qBzWd5l5vQ6KYuTwNgONAr03Mh+a xYv/PQE9f95tyF8vS9GSVQDZFay+DiN3dmrt0EpnlEva4M0hiscANAy90kOiYMxE5jdt 6j1tOMf+g3dir4KkhAQzZvJbFxLCt0yQsMAfQXNFFh+brxx6J0Mzx+G1VaUBwK6O2acc CyBQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QhrFKWsUCK+BEM0aD0PrGGBv2e+dmfgaO+e2DAm5ZiE=; b=OZuMDcW5vir8vMbzl/Y3w/h9j+q5Kf6xXBN7n+aFyQti1Yjrpan0C/zq2DAhDhHtmY 1wj7Q1rwxvPVIp25+SH2du7485RUVhiiO8jTi0QhLX6b0BEsJdGiaBvcUeuDlGRWzKKR QAgYrEa+BgKADMxlXRFO4HskXE7sP37nEiwjeyl2uZtrZPaFoEj/Qo++hQVDS2XCSw8+ 9qSJdsfGFNAFsb615zpbgUXO1HxlvElV4iKdKyMJSI78c4c65QUKXR7K2hoXLolwhaYk XJr0/F7xsvzSpBvH7H1BCxf5IzmMAGKU9RvgtNMnDLRITEaltIeeOLWwYVH42RDPgBH8 jqCw== X-Gm-Message-State: AJIora/pHeTwN9FKDdgnhqDhhsxk9jVyzUvxpsRXX2CkQxFxt7hKBxGz iIze+4xdTJc/FyC4Ib+sQG6bJbPSNSD/pg== X-Google-Smtp-Source: AGRyM1vvZBKEC12QLqFg9kHGAU8PXpG/tJ2fNzo2LCKP78NqdF/KGiqH9Hkb3wf0NpmGiMis7ftFzA== X-Received: by 2002:a02:8797:0:b0:33c:8c21:5a3c with SMTP id t23-20020a028797000000b0033c8c215a3cmr5125292jai.172.1657374663627; Sat, 09 Jul 2022 06:51:03 -0700 (PDT) Received: from aford-IdeaCentre-A730.lan ([2601:448:8400:9e8:4a65:3ca1:59ec:e66b]) by smtp.gmail.com with ESMTPSA id p133-20020a02298b000000b0033f3e34f3b4sm635441jap.150.2022.07.09.06.51.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jul 2022 06:51:03 -0700 (PDT) From: Adam Ford To: linux-media@vger.kernel.org Cc: dave.stevenson@raspberrypi.com, mchehab@kernel.org, linux-kernel@vger.kernel.org, Adam Ford Subject: [PATCH 2/2] media: i2c: imx219: Support four-lane operation Date: Sat, 9 Jul 2022 08:50:52 -0500 Message-Id: <20220709135052.3850913-2-aford173@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220709135052.3850913-1-aford173@gmail.com> References: <20220709135052.3850913-1-aford173@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The imx219 camera is capable of either two-lane or four-lane operation. When operating in four-lane, both the pixel rate and link frequency change. Regardless of the mode, however, both frequencies remain fixed. Helper functions are needed to read and set pixel and link frequencies which also reduces the number of fixed registers in the table of modes. Since the link frequency and number of lanes is extracted from the endpoint, move the endpoint handling into the probe function and out of the imx219_check_hwcfg. This simplifies the imx219_check_hwcfg just a bit. Signed-off-by: Adam Ford --- V3: Keep the helper function doing the link and lane parsing to keep th probe function small. diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c index faa5dab3c2ec..bb4125e7e113 100644 --- a/drivers/media/i2c/imx219.c +++ b/drivers/media/i2c/imx219.c @@ -42,10 +42,16 @@ /* External clock frequency is 24.0M */ #define IMX219_XCLK_FREQ 24000000 -/* Pixel rate is fixed at 182.4M for all the modes */ +/* Pixel rate is fixed for all the modes */ #define IMX219_PIXEL_RATE 182400000 +#define IMX219_PIXEL_RATE_4LANE 280800000 #define IMX219_DEFAULT_LINK_FREQ 456000000 +#define IMX219_DEFAULT_LINK_FREQ_4LANE 363000000 + +#define IMX219_REG_CSI_LANE_MODE 0x0114 +#define IMX219_CSI_2_LANE_MODE 0x01 +#define IMX219_CSI_4_LANE_MODE 0x03 /* V_TIMING internal */ #define IMX219_REG_VTS 0x0160 @@ -299,6 +305,10 @@ static const s64 imx219_link_freq_menu[] = { IMX219_DEFAULT_LINK_FREQ, }; +static const s64 imx219_link_freq_4lane_menu[] = { + IMX219_DEFAULT_LINK_FREQ_4LANE, +}; + static const char * const imx219_test_pattern_menu[] = { "Disabled", "Color Bars", @@ -474,6 +484,9 @@ struct imx219 { /* Streaming on/off */ bool streaming; + + /* Two or Four lanes */ + u8 lanes; }; static inline struct imx219 *to_imx219(struct v4l2_subdev *_sd) @@ -936,6 +949,13 @@ static int imx219_get_selection(struct v4l2_subdev *sd, return -EINVAL; } +static int imx219_configure_lanes(struct imx219 *imx219) +{ + return imx219_write_reg(imx219, IMX219_REG_CSI_LANE_MODE, + IMX219_REG_VALUE_08BIT, (imx219->lanes == 2) ? + IMX219_CSI_2_LANE_MODE : IMX219_CSI_4_LANE_MODE); +}; + static int imx219_start_streaming(struct imx219 *imx219) { struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd); @@ -953,6 +973,13 @@ static int imx219_start_streaming(struct imx219 *imx219) goto err_rpm_put; } + /* Configure two or four Lane mode */ + ret = imx219_configure_lanes(imx219); + if (ret) { + dev_err(&client->dev, "%s failed to configure lanes\n", __func__); + goto err_rpm_put; + } + /* Apply default values of current mode */ reg_list = &imx219->mode->reg_list; ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs); @@ -1184,6 +1211,11 @@ static const struct v4l2_subdev_internal_ops imx219_internal_ops = { .open = imx219_open, }; +static unsigned long imx219_get_pixel_rate(struct imx219 *imx219) +{ + return (imx219->lanes == 2) ? IMX219_PIXEL_RATE : IMX219_PIXEL_RATE_4LANE; +} + /* Initialize control handlers */ static int imx219_init_controls(struct imx219 *imx219) { @@ -1205,15 +1237,16 @@ static int imx219_init_controls(struct imx219 *imx219) /* By default, PIXEL_RATE is read only */ imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_PIXEL_RATE, - IMX219_PIXEL_RATE, - IMX219_PIXEL_RATE, 1, - IMX219_PIXEL_RATE); + imx219_get_pixel_rate(imx219), + imx219_get_pixel_rate(imx219), 1, + imx219_get_pixel_rate(imx219)); imx219->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_LINK_FREQ, ARRAY_SIZE(imx219_link_freq_menu) - 1, 0, - imx219_link_freq_menu); + (imx219->lanes == 2) ? imx219_link_freq_menu : + imx219_link_freq_4lane_menu); if (imx219->link_freq) imx219->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; @@ -1308,7 +1341,7 @@ static void imx219_free_controls(struct imx219 *imx219) mutex_destroy(&imx219->mutex); } -static int imx219_check_hwcfg(struct device *dev) +static int imx219_check_hwcfg(struct device *dev, struct imx219 *imx219) { struct fwnode_handle *endpoint; struct v4l2_fwnode_endpoint ep_cfg = { @@ -1328,10 +1361,12 @@ static int imx219_check_hwcfg(struct device *dev) } /* Check the number of MIPI CSI2 data lanes */ - if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) { - dev_err(dev, "only 2 data lanes are currently supported\n"); + if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2 && + ep_cfg.bus.mipi_csi2.num_data_lanes != 4) { + dev_err(dev, "only 2 or 4 data lanes are currently supported\n"); goto error_out; } + imx219->lanes = ep_cfg.bus.mipi_csi2.num_data_lanes; /* Check the link frequency set in device tree */ if (!ep_cfg.nr_of_link_frequencies) { @@ -1339,8 +1374,8 @@ static int imx219_check_hwcfg(struct device *dev) goto error_out; } - if (ep_cfg.nr_of_link_frequencies != 1 || - ep_cfg.link_frequencies[0] != IMX219_DEFAULT_LINK_FREQ) { + if (ep_cfg.link_frequencies[0] != ((imx219->lanes == 2) ? + IMX219_DEFAULT_LINK_FREQ : IMX219_DEFAULT_LINK_FREQ_4LANE)) { dev_err(dev, "Link frequency not supported: %lld\n", ep_cfg.link_frequencies[0]); goto error_out; @@ -1368,7 +1403,7 @@ static int imx219_probe(struct i2c_client *client) v4l2_i2c_subdev_init(&imx219->sd, client, &imx219_subdev_ops); /* Check the hardware configuration in device tree */ - if (imx219_check_hwcfg(dev)) + if (imx219_check_hwcfg(dev, imx219)) return -EINVAL; /* Get system clock (xclk) */