From patchwork Mon Oct 31 23:21:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 13026463 X-Patchwork-Delegate: kieran@bingham.xyz 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 877D2FA3741 for ; Mon, 31 Oct 2022 23:22:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229912AbiJaXWi (ORCPT ); Mon, 31 Oct 2022 19:22:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229689AbiJaXWS (ORCPT ); Mon, 31 Oct 2022 19:22:18 -0400 Received: from mail-wm1-x329.google.com (mail-wm1-x329.google.com [IPv6:2a00:1450:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 004BD15819; Mon, 31 Oct 2022 16:22:15 -0700 (PDT) Received: by mail-wm1-x329.google.com with SMTP id b20-20020a05600c4e1400b003cc28585e2fso8985693wmq.1; Mon, 31 Oct 2022 16:22:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=JdWVp8VKApnfegQEOrjaVUnNIwV9nr2tqU0d5pk0pbY=; b=aVYZykcQRdCNhljn6y2lG2hREcVaK6h7Y9tlwECutf18hy2Xq5a2QfW1vMzgeV9mKw 1mTjtFHPy836OtHRKd93eUAE5yKBfocaQETKWEilmEW0yN2DRSGoKx/98blsReyBZxtg rhD3xPrM3DYzaX4uxQFuYkFH+XMHsI+11OSuCSbYzvqjvfpbrtJULWjlYJ5YlZkwJQ77 DkXm1o+8BvuBW0EGeMhh0t3FJhCGFfiF5JB7aGNSBaFB+arnCyCtj1EFtQBuQsEmU3x2 KelZrDwwaeZc4mxMVuNLprEf/y+G9PDySKogLFJ35fwCs6LI8lvYcXKxiU1MXTuvt5RT +zzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=JdWVp8VKApnfegQEOrjaVUnNIwV9nr2tqU0d5pk0pbY=; b=V2JLpOpyYD3xuMHxdlSDbeDX652EeyupdhMeTS7gRm8f6Iy3E3n/NomLsneIjjbYqm g1bh/edQVI7UvnBHzoc/qZYbKG9W0i2zYN9KrJaD76kRULexPs8xt9kJ/t7pRqG748l7 xJqVskCEnyX9ppy34dnTNqI2i4HJqsBTDYQY6Rmn++UmLXjhEzX4vTmd4FbOfXZjKJAW KLG/Ta30BrDxxrRnggLsl3i8S5NpQGzUsuoTxp+c4kO1OLEJ/B2OmwgOG4xRhDCvZ9Wt S+uYYKUOW6hHoAVI5tTcTc0PotTeSckUJZn0KyEr5hJ37wdKJpaAgUVQZb4IzejvVaYa FCPA== X-Gm-Message-State: ACrzQf2vyoRFrVDybxEOolAVmlPhWo5sG5G1absZuYD/A2CWaMjCKE/N RRausqT1IJCoCp9AqoRhpgM= X-Google-Smtp-Source: AMsMyM55AZpk7lKS6zqkZ5m+nxrCYfO5A1HzB5ycOj0l2bC7+SYyD6GBmeVHyjlI4YCVxe8b/oWIkA== X-Received: by 2002:a05:600c:2150:b0:3cf:6c05:b4ab with SMTP id v16-20020a05600c215000b003cf6c05b4abmr6846876wml.161.1667258534320; Mon, 31 Oct 2022 16:22:14 -0700 (PDT) Received: from prasmi.home ([2a00:23c8:2501:c701:15da:d6ab:ec79:436]) by smtp.gmail.com with ESMTPSA id l24-20020a1c7918000000b003cf7928e731sm2190343wme.9.2022.10.31.16.22.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Oct 2022 16:22:13 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Sakari Ailus , Laurent Pinchart , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Geert Uytterhoeven , Magnus Damm , Hans Verkuil Cc: Shawn Tu , Jacopo Mondi , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v4 6/9] media: i2c: ov5645: Use runtime PM Date: Mon, 31 Oct 2022 23:21:59 +0000 Message-Id: <20221031232202.131945-7-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221031232202.131945-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20221031232202.131945-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Lad Prabhakar Switch to using runtime PM for power management. Signed-off-by: Lad Prabhakar Reviewed-by: Laurent Pinchart --- v3->v4 * Fixed comments pointed by Sakari v2->v3 * Jumped to err_pm_runtime label in case of sd register failure * Now calling pm_runtime_mark_last_busy() before pm_runtime_put_autosuspend() call * Now calling pm_runtime_put_sync() in case s_stream(1) fails * In s_stream(0) no calling pm_runtime_mark_last_busy() and pm_runtime_put_autosuspend() * Included RB tag from Laurent. v1->v2 * Moved pm_runtime_*_autosuspend() calls after registering the subdev. --- drivers/media/i2c/ov5645.c | 133 +++++++++++++++++++------------------ 1 file changed, 68 insertions(+), 65 deletions(-) diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c index 47451238ca05..2e6135d0a31a 100644 --- a/drivers/media/i2c/ov5645.c +++ b/drivers/media/i2c/ov5645.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -108,7 +109,6 @@ struct ov5645 { u8 timing_tc_reg21; struct mutex power_lock; /* lock to protect power state */ - int power_count; struct gpio_desc *enable_gpio; struct gpio_desc *rst_gpio; @@ -635,8 +635,24 @@ static int ov5645_set_register_array(struct ov5645 *ov5645, return 0; } -static int ov5645_set_power_on(struct ov5645 *ov5645) +static int ov5645_set_power_off(struct device *dev) { + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5645 *ov5645 = to_ov5645(sd); + + ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x58); + gpiod_set_value_cansleep(ov5645->rst_gpio, 1); + gpiod_set_value_cansleep(ov5645->enable_gpio, 0); + clk_disable_unprepare(ov5645->xclk); + regulator_bulk_disable(OV5645_NUM_SUPPLIES, ov5645->supplies); + + return 0; +} + +static int ov5645_set_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov5645 *ov5645 = to_ov5645(sd); int ret; ret = regulator_bulk_enable(OV5645_NUM_SUPPLIES, ov5645->supplies); @@ -658,57 +674,19 @@ static int ov5645_set_power_on(struct ov5645 *ov5645) msleep(20); - return 0; -} - -static void ov5645_set_power_off(struct ov5645 *ov5645) -{ - gpiod_set_value_cansleep(ov5645->rst_gpio, 1); - gpiod_set_value_cansleep(ov5645->enable_gpio, 0); - clk_disable_unprepare(ov5645->xclk); - regulator_bulk_disable(OV5645_NUM_SUPPLIES, ov5645->supplies); -} - -static int ov5645_s_power(struct v4l2_subdev *sd, int on) -{ - struct ov5645 *ov5645 = to_ov5645(sd); - int ret = 0; - - mutex_lock(&ov5645->power_lock); - - /* If the power count is modified from 0 to != 0 or from != 0 to 0, - * update the power state. - */ - if (ov5645->power_count == !on) { - if (on) { - ret = ov5645_set_power_on(ov5645); - if (ret < 0) - goto exit; - - ret = ov5645_set_register_array(ov5645, - ov5645_global_init_setting, + ret = ov5645_set_register_array(ov5645, ov5645_global_init_setting, ARRAY_SIZE(ov5645_global_init_setting)); - if (ret < 0) { - dev_err(ov5645->dev, - "could not set init registers\n"); - ov5645_set_power_off(ov5645); - goto exit; - } - - usleep_range(500, 1000); - } else { - ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x58); - ov5645_set_power_off(ov5645); - } + if (ret < 0) { + dev_err(ov5645->dev, "could not set init registers\n"); + goto exit; } - /* Update the power count. */ - ov5645->power_count += on ? 1 : -1; - WARN_ON(ov5645->power_count < 0); + usleep_range(500, 1000); -exit: - mutex_unlock(&ov5645->power_lock); + return 0; +exit: + ov5645_set_power_off(dev); return ret; } @@ -795,7 +773,7 @@ static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl) int ret; mutex_lock(&ov5645->power_lock); - if (!ov5645->power_count) { + if (!pm_runtime_get_if_in_use(ov5645->dev)) { mutex_unlock(&ov5645->power_lock); return 0; } @@ -827,6 +805,8 @@ static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl) break; } + pm_runtime_mark_last_busy(ov5645->dev); + pm_runtime_put_autosuspend(ov5645->dev); mutex_unlock(&ov5645->power_lock); return ret; @@ -991,6 +971,10 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable) int ret; if (enable) { + ret = pm_runtime_resume_and_get(ov5645->dev); + if (ret < 0) + return ret; + ret = ov5645_set_register_array(ov5645, ov5645->current_mode->data, ov5645->current_mode->data_size); @@ -998,22 +982,22 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable) dev_err(ov5645->dev, "could not set mode %dx%d\n", ov5645->current_mode->width, ov5645->current_mode->height); - return ret; + goto err_rpm_put; } ret = v4l2_ctrl_handler_setup(&ov5645->ctrls); if (ret < 0) { dev_err(ov5645->dev, "could not sync v4l2 controls\n"); - return ret; + goto err_rpm_put; } ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x45); if (ret < 0) - return ret; + goto err_rpm_put; ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0, OV5645_SYSTEM_CTRL0_START); if (ret < 0) - return ret; + goto err_rpm_put; } else { ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x40); if (ret < 0) @@ -1023,14 +1007,17 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable) OV5645_SYSTEM_CTRL0_STOP); if (ret < 0) return ret; + + pm_runtime_mark_last_busy(ov5645->dev); + pm_runtime_put_autosuspend(ov5645->dev); } return 0; -} -static const struct v4l2_subdev_core_ops ov5645_core_ops = { - .s_power = ov5645_s_power, -}; +err_rpm_put: + pm_runtime_put_sync(ov5645->dev); + return ret; +} static const struct v4l2_subdev_video_ops ov5645_video_ops = { .s_stream = ov5645_s_stream, @@ -1046,7 +1033,6 @@ static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = { }; static const struct v4l2_subdev_ops ov5645_subdev_ops = { - .core = &ov5645_core_ops, .video = &ov5645_video_ops, .pad = &ov5645_subdev_pad_ops, }; @@ -1188,11 +1174,9 @@ static int ov5645_probe(struct i2c_client *client) goto free_ctrl; } - ret = ov5645_s_power(&ov5645->sd, true); - if (ret < 0) { - dev_err(dev, "could not power up OV5645\n"); + ret = ov5645_set_power_on(dev); + if (ret) goto free_entity; - } ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high); if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) { @@ -1233,20 +1217,30 @@ static int ov5645_probe(struct i2c_client *client) goto power_down; } - ov5645_s_power(&ov5645->sd, false); + pm_runtime_set_active(dev); + pm_runtime_get_noresume(dev); + pm_runtime_enable(dev); ret = v4l2_async_register_subdev(&ov5645->sd); if (ret < 0) { dev_err(dev, "could not register v4l2 device\n"); - goto free_entity; + goto err_pm_runtime; } + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + ov5645_entity_init_cfg(&ov5645->sd, NULL); return 0; +err_pm_runtime: + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); power_down: - ov5645_s_power(&ov5645->sd, false); + ov5645_set_power_off(dev); free_entity: media_entity_cleanup(&ov5645->sd.entity); free_ctrl: @@ -1264,6 +1258,10 @@ static void ov5645_remove(struct i2c_client *client) v4l2_async_unregister_subdev(&ov5645->sd); media_entity_cleanup(&ov5645->sd.entity); v4l2_ctrl_handler_free(&ov5645->ctrls); + pm_runtime_disable(ov5645->dev); + if (!pm_runtime_status_suspended(ov5645->dev)) + ov5645_set_power_off(ov5645->dev); + pm_runtime_set_suspended(ov5645->dev); mutex_destroy(&ov5645->power_lock); } @@ -1279,10 +1277,15 @@ static const struct of_device_id ov5645_of_match[] = { }; MODULE_DEVICE_TABLE(of, ov5645_of_match); +static const struct dev_pm_ops ov5645_pm_ops = { + SET_RUNTIME_PM_OPS(ov5645_set_power_off, ov5645_set_power_on, NULL) +}; + static struct i2c_driver ov5645_i2c_driver = { .driver = { .of_match_table = ov5645_of_match, .name = "ov5645", + .pm = &ov5645_pm_ops, }, .probe_new = ov5645_probe, .remove = ov5645_remove,