From patchwork Fri Oct 14 18:34:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 615132 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 57838C4321E for ; Fri, 14 Oct 2022 18:35:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231185AbiJNSfh (ORCPT ); Fri, 14 Oct 2022 14:35:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230505AbiJNSfa (ORCPT ); Fri, 14 Oct 2022 14:35:30 -0400 Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D97909F368; Fri, 14 Oct 2022 11:35:21 -0700 (PDT) Received: by mail-wr1-x436.google.com with SMTP id r13so8846542wrj.11; Fri, 14 Oct 2022 11:35:21 -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=UiEFfAcdWdXIO10yeqLn2kjMb2xqsk14NlsbM8q2PJc=; b=hzTJ1vTVbL5GH17OppMGwJnbCOXcp6XvJ2Hj/NEf8PDfKQlmUcN55BZdP5h7mvVshm 504L19V+ZvDa3sIuGJGiwdB9cCdF+W3XHe07Ltqcs1zWWfu75jCtuKLDs1m0LVonQZ0X ZaGAb3MLCFyy5cnWxN7uq7eoo827604yK48pMZFtDYIT8nS/R4+YAXRWIsH4THMj9Ysc NnMMOuL1UiDbxBWMzjsJ9Swo82I7i2CfmgiVoHawYDr+Wj/a5MUxjIKHPQ3Ci1W9Fl7R ucZm0rkTcW7WoxO+PXXU0CZa9lwaipmdoPTihi8NfwoDZJWdiwFzh9DfoR+x3Jv/1vSX uRFQ== 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=UiEFfAcdWdXIO10yeqLn2kjMb2xqsk14NlsbM8q2PJc=; b=b5zGb9jD0PlPn8ASrR4j+Wj/HogWbiKjbPl15gTBePPQdkRNE619F9UeQApHkZRutk MxFMEq73Ga9gA1rQqRhQE+5cKUEhvA474rW6RDT9u6q02UxFJ/nBNzMdp/Em3TfaB2Qq w9gB4eq+B9z/5C5Dwh2ZD/Rr+M8IUeIvxyv1MVV69/ilSUAh2UyxuSamV88Y5dDlQhjx GOSahJGmtQ0yTwvaZyasjlVMOC4gn+hHRnjRHdIVye+de9JSt1mxDjLnX4nwo5CC3cCh 9XcwYFR2c7KOLrV2K+OBbOfPDlDj5O8vsMvRxpQlkezVbia3/4doTmjL1/gxfWsE8AxP qE5g== X-Gm-Message-State: ACrzQf0FIwaAg2FB+7r6BNLlUhqvcvREuqzVJqjTsUdx5JXot4Clqf/v FHJlm3/O4hJV9myeLx4xPV7K2fJ26fXDyQ== X-Google-Smtp-Source: AMsMyM4HG2ev+1W3DWzxR6W2myXACtGN5quQL4sbWR89ZGpP4SC4MEHYXYdfAWz2QudQmbo/DTF+fA== X-Received: by 2002:a5d:6dab:0:b0:231:3a49:3079 with SMTP id u11-20020a5d6dab000000b002313a493079mr4229577wrs.148.1665772519305; Fri, 14 Oct 2022 11:35:19 -0700 (PDT) Received: from prasmi.home ([2a00:23c8:2501:c701:fc4d:6548:d8bd:5bd]) by smtp.gmail.com with ESMTPSA id h10-20020a5d504a000000b0022a403954c3sm2485410wrt.42.2022.10.14.11.35.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Oct 2022 11:35:18 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Sakari Ailus , Laurent Pinchart , Krzysztof Kozlowski , Rob Herring , Mauro Carvalho Chehab , Hans Verkuil Cc: Shawn Tu , Jacopo Mondi , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v2 2/5] media: i2c: ov5645: Use runtime PM Date: Fri, 14 Oct 2022 19:34:56 +0100 Message-Id: <20221014183459.181567-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221014183459.181567-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20221014183459.181567-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Lad Prabhakar Switch to using runtime PM for power management. Signed-off-by: Lad Prabhakar Reviewed-by: Laurent Pinchart --- v1->v2 * Moved pm_runtime_*_autosuspend() calls after registering the subdev. --- drivers/media/i2c/Kconfig | 2 +- drivers/media/i2c/ov5645.c | 137 +++++++++++++++++++------------------ 2 files changed, 70 insertions(+), 69 deletions(-) diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 7806d4b81716..c0edd1017fe8 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -459,7 +459,7 @@ config VIDEO_OV5640 config VIDEO_OV5645 tristate "OmniVision OV5645 sensor support" depends on OF - depends on I2C && VIDEO_DEV + depends on I2C && PM && VIDEO_DEV select MEDIA_CONTROLLER select VIDEO_V4L2_SUBDEV_API select V4L2_FWNODE diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c index 81e4e87e1821..1551690a94e0 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 +805,7 @@ static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl) break; } + pm_runtime_put_autosuspend(ov5645->dev); mutex_unlock(&ov5645->power_lock); return ret; @@ -991,6 +970,10 @@ 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 +981,22 @@ 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 +1006,15 @@ static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable) OV5645_SYSTEM_CTRL0_STOP); if (ret < 0) return ret; + pm_runtime_put(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(ov5645->dev); + return ret; +} static const struct v4l2_subdev_video_ops ov5645_video_ops = { .s_stream = ov5645_s_stream, @@ -1046,7 +1030,6 @@ 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 +1171,9 @@ 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) { @@ -1209,12 +1190,16 @@ static int ov5645_probe(struct i2c_client *client) dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr); + pm_runtime_set_active(dev); + pm_runtime_get_noresume(dev); + pm_runtime_enable(dev); + ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL, &ov5645->aec_pk_manual); if (ret < 0) { dev_err(dev, "could not read AEC/AGC mode\n"); ret = -ENODEV; - goto power_down; + goto err_pm_runtime; } ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20, @@ -1222,7 +1207,7 @@ static int ov5645_probe(struct i2c_client *client) if (ret < 0) { dev_err(dev, "could not read vflip value\n"); ret = -ENODEV; - goto power_down; + goto err_pm_runtime; } ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21, @@ -1230,23 +1215,30 @@ static int ov5645_probe(struct i2c_client *client) if (ret < 0) { dev_err(dev, "could not read hflip value\n"); ret = -ENODEV; - goto power_down; + goto err_pm_runtime; } - ov5645_s_power(&ov5645->sd, false); - ret = v4l2_async_register_subdev(&ov5645->sd); if (ret < 0) { dev_err(dev, "could not register v4l2 device\n"); + pm_runtime_disable(dev); + pm_runtime_set_suspended(dev); goto free_entity; } + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(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 +1256,10 @@ 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 +1275,15 @@ 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,