From patchwork Mon Aug 5 16:42:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13753845 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 aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5198CC3DA7F for ; Mon, 5 Aug 2024 16:43:58 +0000 (UTC) Received: from relmlie5.idc.renesas.com (relmlie5.idc.renesas.com [210.160.252.171]) by mx.groups.io with SMTP id smtpd.web11.12741.1722876226641507271 for ; Mon, 05 Aug 2024 09:43:49 -0700 Authentication-Results: mx.groups.io; dkim=none (message not signed); spf=pass (domain: bp.renesas.com, ip: 210.160.252.171, mailfrom: biju.das.jz@bp.renesas.com) X-IronPort-AV: E=Sophos;i="6.09,265,1716217200"; d="scan'208";a="214739873" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 06 Aug 2024 01:43:49 +0900 Received: from localhost.localdomain (unknown [10.226.92.197]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id B108D4020F32; Tue, 6 Aug 2024 01:43:47 +0900 (JST) From: Biju Das To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu , Pavel Machek Cc: Biju Das , Lad Prabhakar Subject: [PATCH 6.1.y-cip 02/30] media: i2c: ov5645: Use runtime PM Date: Mon, 5 Aug 2024 17:42:55 +0100 Message-ID: <20240805164342.211857-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240805164342.211857-1-biju.das.jz@bp.renesas.com> References: <20240805164342.211857-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 05 Aug 2024 16:43:58 -0000 X-Groupsio-URL: https://lists.cip-project.org/g/cip-dev/message/16724 From: Lad Prabhakar commit b504503954c7c3741112d4260fbfc9214c66de9b upstream. Switch to using runtime PM for power management. Signed-off-by: Lad Prabhakar Reviewed-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Biju Das --- 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,