From patchwork Thu Jan 19 13:00:49 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: 644750 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 B9884C004D4 for ; Thu, 19 Jan 2023 13:03:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230433AbjASND3 (ORCPT ); Thu, 19 Jan 2023 08:03:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230410AbjASNDB (ORCPT ); Thu, 19 Jan 2023 08:03:01 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 85702798C6 for ; Thu, 19 Jan 2023 05:01:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674133302; 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=ga2PGVX0PPBs2vzCz8Ez+avx29WM7urpa7gn/akoUYg=; b=LKOgbkccubJ/WKjNXB7GpDwLvoT0EJik1WP74kyGgqyZPg6ueXL8tjq4mWC7LI4JVnMBdL /XzqUsqSC4hqJJT3hDPnJN7GdKBIDI1XXb+8HA42YyJYuWbUMdULI/Ae8al0qvT2DcDz7Q QzkEv8S7o8P1t1Ffh+VdZDGqbVFlw30= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-636--Z7FW677MS6ZUQHoTu-klQ-1; Thu, 19 Jan 2023 08:01:39 -0500 X-MC-Unique: -Z7FW677MS6ZUQHoTu-klQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 955B21C0A594; Thu, 19 Jan 2023 13:01:38 +0000 (UTC) Received: from localhost.localdomain (unknown [10.39.194.158]) by smtp.corp.redhat.com (Postfix) with ESMTP id B5E7E14152F6; Thu, 19 Jan 2023 13:01:34 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v4 07/11] media: v4l2-core: Make the v4l2-core code enable/disable the privacy LED if present Date: Thu, 19 Jan 2023 14:00:49 +0100 Message-Id: <20230119130053.111344-8-hdegoede@redhat.com> In-Reply-To: <20230119130053.111344-1-hdegoede@redhat.com> References: <20230119130053.111344-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Make v4l2_async_register_subdev_sensor() try to get a privacy LED associated with the sensor and extend the call_s_stream() wrapper to enable/disable the privacy LED if found. This makes the core handle privacy LED control, rather then having to duplicate this code in all the sensor drivers. Suggested-by: Sakari Ailus Signed-off-by: Hans de Goede --- Changes in v4 (requested by Laurent Pinchart): - Move the led_get() call to v4l2_async_register_subdev_sensor() and make errors other then -ENOENT fail the register() call. - Move the led_disable_sysfs() call to be done at led_get() time, instead of only disabling the sysfs interface when the sensor is streaming. --- drivers/media/v4l2-core/v4l2-fwnode.c | 15 +++++++++++++++ drivers/media/v4l2-core/v4l2-subdev.c | 18 ++++++++++++++++++ include/media/v4l2-subdev.h | 3 +++ 3 files changed, 36 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index c8a2264262bc..cfac1e2ae501 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -16,6 +16,7 @@ */ #include #include +#include #include #include #include @@ -1295,6 +1296,20 @@ int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd) if (WARN_ON(!sd->dev)) return -ENODEV; +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + sd->privacy_led = led_get(sd->dev, "privacy-led"); + if (IS_ERR(sd->privacy_led) && PTR_ERR(sd->privacy_led) != -ENOENT) + return dev_err_probe(sd->dev, PTR_ERR(sd->privacy_led), "getting privacy LED\n"); + + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_disable(sd->privacy_led); + led_trigger_remove(sd->privacy_led); + led_set_brightness(sd->privacy_led, 0); + mutex_unlock(&sd->privacy_led->led_access); + } +#endif + notifier = kzalloc(sizeof(*notifier), GFP_KERNEL); if (!notifier) return -ENOMEM; diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 4988a25bd8f4..f33e943aab3f 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -9,6 +9,7 @@ */ #include +#include #include #include #include @@ -322,6 +323,14 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) { int ret; +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + if (enable) + led_set_brightness(sd->privacy_led, sd->privacy_led->max_brightness); + else + led_set_brightness(sd->privacy_led, 0); + } +#endif ret = sd->ops->video->s_stream(sd, enable); if (!enable && ret < 0) { @@ -1050,6 +1059,14 @@ EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize); void v4l2_subdev_cleanup(struct v4l2_subdev *sd) { +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_enable(sd->privacy_led); + mutex_unlock(&sd->privacy_led->led_access); + led_put(sd->privacy_led); + } +#endif __v4l2_subdev_state_free(sd->active_state); sd->active_state = NULL; } @@ -1090,6 +1107,7 @@ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) sd->grp_id = 0; sd->dev_priv = NULL; sd->host_priv = NULL; + sd->privacy_led = NULL; #if defined(CONFIG_MEDIA_CONTROLLER) sd->entity.name = sd->name; sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV; diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index b15fa9930f30..0547313f98cc 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -38,6 +38,7 @@ struct v4l2_subdev; struct v4l2_subdev_fh; struct tuner_setup; struct v4l2_mbus_frame_desc; +struct led_classdev; /** * struct v4l2_decode_vbi_line - used to decode_vbi_line @@ -982,6 +983,8 @@ struct v4l2_subdev { * appropriate functions. */ + struct led_classdev *privacy_led; + /* * TODO: active_state should most likely be changed from a pointer to an * embedded field. For the time being it's kept as a pointer to more