From patchwork Fri Dec 16 11:30:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 634927 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 4A978C4167B for ; Fri, 16 Dec 2022 11:31:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231211AbiLPLbe (ORCPT ); Fri, 16 Dec 2022 06:31:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231213AbiLPLbd (ORCPT ); Fri, 16 Dec 2022 06:31:33 -0500 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 C15FC1BEB2 for ; Fri, 16 Dec 2022 03:30:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1671190244; 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=TPZAvcSWa7ZoNFdQlUVFBketRAGJW/SHrz8gHWtEsVk=; b=epxTdkP8dEEFbmQnN+WG6tFJFY9N1pqPKWWBrt0DzTPDuB21fwlCcV5y9lFPXTRKS5XDTv ozgG6uRuj6Z1o+dycqe+GlfrDbfLgDFcWhTf8Lo6YLV75Tqudq83O5sjs4w1zLnArBdO/H sMjAapYyl23su8La7UtnEQOk7tYmcU0= 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-633--hl6y3gGP2q5TlEBpBCLwQ-1; Fri, 16 Dec 2022 06:30:41 -0500 X-MC-Unique: -hl6y3gGP2q5TlEBpBCLwQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E25BA3814595; Fri, 16 Dec 2022 11:30:40 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.194.205]) by smtp.corp.redhat.com (Postfix) with ESMTP id B3A3C400F58; Fri, 16 Dec 2022 11:30:37 +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 , Yao Hao , linux-media@vger.kernel.org Subject: [PATCH v3 06/11] v4l: subdev: Make the v4l2-subdev core code enable/disable the privacy LED if present Date: Fri, 16 Dec 2022 12:30:08 +0100 Message-Id: <20221216113013.126881-7-hdegoede@redhat.com> In-Reply-To: <20221216113013.126881-1-hdegoede@redhat.com> References: <20221216113013.126881-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Extend the call_s_stream() wrapper to enable/disable sensor privacy LEDs for sensors with a privacy LED, rather then having to duplicate this code in all the sensor drivers. Suggested-by: Sakari Ailus Signed-off-by: Hans de Goede --- drivers/media/v4l2-core/v4l2-subdev.c | 40 +++++++++++++++++++++++++++ include/media/v4l2-subdev.h | 3 ++ 2 files changed, 43 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 4988a25bd8f4..7344f6cd58b7 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -318,10 +318,44 @@ static int call_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad, sd->ops->pad->get_mbus_config(sd, pad, config); } +#if IS_REACHABLE(CONFIG_LEDS_CLASS) +#include + +static void call_s_stream_update_pled(struct v4l2_subdev *sd, int enable) +{ + if (!sd->dev) + return; + + /* Try to get privacy-led once, at first s_stream() */ + if (!sd->privacy_led) + sd->privacy_led = led_get(sd->dev, "privacy-led"); + + if (IS_ERR(sd->privacy_led)) + return; + + mutex_lock(&sd->privacy_led->led_access); + + if (enable) { + led_sysfs_disable(sd->privacy_led); + led_trigger_remove(sd->privacy_led); + led_set_brightness(sd->privacy_led, sd->privacy_led->max_brightness); + } else { + led_set_brightness(sd->privacy_led, 0); + led_sysfs_enable(sd->privacy_led); + } + + mutex_unlock(&sd->privacy_led->led_access); +} +#else +static void call_s_stream_update_pled(struct v4l2_subdev *sd, int enable) {} +#endif + static int call_s_stream(struct v4l2_subdev *sd, int enable) { int ret; + call_s_stream_update_pled(sd, enable); + ret = sd->ops->video->s_stream(sd, enable); if (!enable && ret < 0) { @@ -1050,6 +1084,11 @@ 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)) + led_put(sd->privacy_led); +#endif + __v4l2_subdev_state_free(sd->active_state); sd->active_state = NULL; } @@ -1090,6 +1129,7 @@ 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