From patchwork Wed Jun 7 16:46:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 13270979 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 A6911C77B7A for ; Wed, 7 Jun 2023 16:48:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230401AbjFGQs2 (ORCPT ); Wed, 7 Jun 2023 12:48:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230326AbjFGQs1 (ORCPT ); Wed, 7 Jun 2023 12:48:27 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C8E91FDA for ; Wed, 7 Jun 2023 09:47:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1686156460; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hQPDEvb0u80O5ZNyanT9GMDZX97mWx50ZKedJHxo+Mc=; b=LYj+uf9lNMvrXXBPFiypzoe8ZIZlip7DMs6LXbiy44RTG0EydIZp4JcBcxtQQWjaY78l4k QtvhF6MUpTkKrkFbENPp9nMVtsXTYLeukko8ZN4q3oOZkD4gnxJLVrllDA/RNkwFmV6LrQ /yhpTcAE8XUx0XRJnrUGCyD4MyUCPxo= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-589-5wxPtPPsN6WpFAyr-uFuoQ-1; Wed, 07 Jun 2023 12:47:37 -0400 X-MC-Unique: 5wxPtPPsN6WpFAyr-uFuoQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6D3C4801224; Wed, 7 Jun 2023 16:47:36 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.192.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 54908C1603B; Wed, 7 Jun 2023 16:47:35 +0000 (UTC) From: Hans de Goede To: Daniel Scally , Laurent Pinchart , Sakari Ailus , Andy Shevchenko Cc: Hans de Goede , Mauro Carvalho Chehab , Kate Hsuan , linux-media@vger.kernel.org Subject: [PATCH 12/28] media: ov2680: Add runtime-pm support Date: Wed, 7 Jun 2023 18:46:56 +0200 Message-Id: <20230607164712.63579-13-hdegoede@redhat.com> In-Reply-To: <20230607164712.63579-1-hdegoede@redhat.com> References: <20230607164712.63579-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Remove the obsolete s_power() callback and instead use runtime-pm + autosuspend, powering-on the sensor on s_stream(1) and releasing the runtime-pm reference on s_stream(0). This also removes the need for ov2680_mode_restore() instead ov2680_stream_enable() now takes care of all sensor initalization after power-on. This is a preparation patch for adding ACPI support. Note this also removes putting the clock lane into LP-11 state from ov2680_power_on() since now streaming will start immediately after powering on the sensor there is no need to put the clock lane in a low power state. Signed-off-by: Hans de Goede --- drivers/media/i2c/ov2680.c | 134 ++++++++++++++++--------------------- 1 file changed, 59 insertions(+), 75 deletions(-) diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c index bfc65c712b84..8a95be552633 100644 --- a/drivers/media/i2c/ov2680.c +++ b/drivers/media/i2c/ov2680.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -98,7 +99,6 @@ struct ov2680_dev { struct gpio_desc *pwdn_gpio; struct mutex lock; /* protect members */ - bool mode_pending_changes; bool is_enabled; bool is_streaming; @@ -277,20 +277,12 @@ static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp) static int ov2680_stream_enable(struct ov2680_dev *sensor) { - return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 1, NULL); -} + int ret = 0; -static int ov2680_stream_disable(struct ov2680_dev *sensor) -{ - return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 0, NULL); -} - -static int ov2680_mode_set(struct ov2680_dev *sensor) -{ - int ret; - - ret = cci_multi_reg_write(sensor->regmap, sensor->current_mode->reg_data, - sensor->current_mode->reg_data_size, NULL); + cci_multi_reg_write(sensor->regmap, ov2680_mode_init_data.reg_data, + ov2680_mode_init_data.reg_data_size, &ret); + cci_multi_reg_write(sensor->regmap, sensor->current_mode->reg_data, + sensor->current_mode->reg_data_size, &ret); if (ret < 0) return ret; @@ -299,21 +291,12 @@ static int ov2680_mode_set(struct ov2680_dev *sensor) if (ret < 0) return ret; - sensor->mode_pending_changes = false; - - return 0; + return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 1, NULL); } -static int ov2680_mode_restore(struct ov2680_dev *sensor) +static int ov2680_stream_disable(struct ov2680_dev *sensor) { - int ret; - - ret = cci_multi_reg_write(sensor->regmap, ov2680_mode_init_data.reg_data, - ov2680_mode_init_data.reg_data_size, NULL); - if (ret < 0) - return ret; - - return ov2680_mode_set(sensor); + return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 0, NULL); } static int ov2680_power_off(struct ov2680_dev *sensor) @@ -360,34 +343,9 @@ static int ov2680_power_on(struct ov2680_dev *sensor) sensor->is_enabled = true; - /* Set clock lane into LP-11 state */ - ov2680_stream_enable(sensor); - usleep_range(1000, 2000); - ov2680_stream_disable(sensor); - return 0; } -static int ov2680_s_power(struct v4l2_subdev *sd, int on) -{ - struct ov2680_dev *sensor = to_ov2680_dev(sd); - int ret = 0; - - mutex_lock(&sensor->lock); - - if (on) - ret = ov2680_power_on(sensor); - else - ret = ov2680_power_off(sensor); - - if (on && ret == 0) - ret = ov2680_mode_restore(sensor); - - mutex_unlock(&sensor->lock); - - return ret; -} - static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { @@ -410,16 +368,20 @@ static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) if (sensor->is_streaming == !!enable) goto unlock; - if (enable && sensor->mode_pending_changes) { - ret = ov2680_mode_set(sensor); + if (enable) { + ret = pm_runtime_resume_and_get(sensor->sd.dev); if (ret < 0) goto unlock; - } - if (enable) ret = ov2680_stream_enable(sensor); - else + if (ret < 0) { + pm_runtime_put(sensor->sd.dev); + goto unlock; + } + } else { ret = ov2680_stream_disable(sensor); + pm_runtime_put(sensor->sd.dev); + } sensor->is_streaming = !!enable; @@ -504,7 +466,6 @@ static int ov2680_set_fmt(struct v4l2_subdev *sd, sensor->current_mode = mode; sensor->fmt = format->format; - sensor->mode_pending_changes = true; unlock: mutex_unlock(&sensor->lock); @@ -588,10 +549,6 @@ static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { .s_ctrl = ov2680_s_ctrl, }; -static const struct v4l2_subdev_core_ops ov2680_core_ops = { - .s_power = ov2680_s_power, -}; - static const struct v4l2_subdev_video_ops ov2680_video_ops = { .g_frame_interval = ov2680_s_g_frame_interval, .s_frame_interval = ov2680_s_g_frame_interval, @@ -608,7 +565,6 @@ static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { }; static const struct v4l2_subdev_ops ov2680_subdev_ops = { - .core = &ov2680_core_ops, .video = &ov2680_video_ops, .pad = &ov2680_pad_ops, }; @@ -627,8 +583,6 @@ static int ov2680_mode_init(struct ov2680_dev *sensor) sensor->current_mode = init_mode; - sensor->mode_pending_changes = true; - return 0; } @@ -704,8 +658,6 @@ static int ov2680_check_id(struct ov2680_dev *sensor) u32 chip_id; int ret; - ov2680_power_on(sensor); - ret = cci_read(sensor->regmap, OV2680_REG_CHIP_ID, &chip_id, NULL); if (ret < 0) { dev_err(sensor->dev, "failed to read chip id\n"); @@ -790,18 +742,39 @@ static int ov2680_probe(struct i2c_client *client) mutex_init(&sensor->lock); - ret = ov2680_check_id(sensor); + /* + * Power up and verify the chip now, so that if runtime pm is + * disabled the chip is left on and streaming will work. + */ + ret = ov2680_power_on(sensor); if (ret < 0) goto lock_destroy; + ret = ov2680_check_id(sensor); + if (ret < 0) + goto err_powerdown; + + pm_runtime_set_active(&client->dev); + pm_runtime_get_noresume(&client->dev); + pm_runtime_enable(&client->dev); + ret = ov2680_v4l2_register(sensor, client); if (ret < 0) - goto lock_destroy; + goto err_pm_runtime; + + pm_runtime_set_autosuspend_delay(&client->dev, 1000); + pm_runtime_use_autosuspend(&client->dev); + pm_runtime_put_autosuspend(&client->dev); dev_info(dev, "ov2680 init correctly\n"); return 0; +err_pm_runtime: + pm_runtime_disable(&client->dev); + pm_runtime_put_noidle(&client->dev); +err_powerdown: + ov2680_power_off(sensor); lock_destroy: dev_err(dev, "ov2680 init fail: %d\n", ret); mutex_destroy(&sensor->lock); @@ -818,9 +791,18 @@ static void ov2680_remove(struct i2c_client *client) mutex_destroy(&sensor->lock); media_entity_cleanup(&sensor->sd.entity); v4l2_ctrl_handler_free(&sensor->ctrls.handler); + + /* + * Disable runtime PM. In case runtime PM is disabled in the kernel, + * make sure to turn power off manually. + */ + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + ov2680_power_off(sensor); + pm_runtime_set_suspended(&client->dev); } -static int __maybe_unused ov2680_suspend(struct device *dev) +static int ov2680_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov2680_dev *sensor = to_ov2680_dev(sd); @@ -828,15 +810,19 @@ static int __maybe_unused ov2680_suspend(struct device *dev) if (sensor->is_streaming) ov2680_stream_disable(sensor); - return 0; + return ov2680_power_off(sensor); } -static int __maybe_unused ov2680_resume(struct device *dev) +static int ov2680_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov2680_dev *sensor = to_ov2680_dev(sd); int ret; + ret = ov2680_power_on(sensor); + if (ret < 0) + goto stream_disable; + if (sensor->is_streaming) { ret = ov2680_stream_enable(sensor); if (ret < 0) @@ -852,9 +838,7 @@ static int __maybe_unused ov2680_resume(struct device *dev) return ret; } -static const struct dev_pm_ops ov2680_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) -}; +static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume, NULL); static const struct of_device_id ov2680_dt_ids[] = { { .compatible = "ovti,ov2680" }, @@ -865,7 +849,7 @@ MODULE_DEVICE_TABLE(of, ov2680_dt_ids); static struct i2c_driver ov2680_i2c_driver = { .driver = { .name = "ov2680", - .pm = &ov2680_pm_ops, + .pm = pm_sleep_ptr(&ov2680_pm_ops), .of_match_table = of_match_ptr(ov2680_dt_ids), }, .probe_new = ov2680_probe,