From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4EBB8C43381 for ; Mon, 21 Dec 2020 18:44:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EA32225AC for ; Mon, 21 Dec 2020 18:44:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726807AbgLUSoH (ORCPT ); Mon, 21 Dec 2020 13:44:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726598AbgLUSoG (ORCPT ); Mon, 21 Dec 2020 13:44:06 -0500 Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1998DC0613D6 for ; Mon, 21 Dec 2020 10:43:26 -0800 (PST) Received: by mail-wm1-x332.google.com with SMTP id 3so11931470wmg.4 for ; Mon, 21 Dec 2020 10:43:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Dw71v3CL2kM3raQJeeszspBPFX2F58JASjvYTnrWOCM=; b=XOv3mP7zUK4jneYBbu/i4GBH/kEqUFHETXAhDBUJrLmK6HUbonxcaTAu8F6Ohru5UX rAwsaNimKdp05wcbnmOu2XsGfPhqgup77quWUSS7RUvUrIC5KaJoj1wTz3ChGWOBMAyZ nHwzAKxwOKTYmMRmeebWMQueyrhZ3SqPLyluU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Dw71v3CL2kM3raQJeeszspBPFX2F58JASjvYTnrWOCM=; b=p+uLCUmdo8iFU1t4GkdCwUFiMxN37d8aGcEWnoatevJIiu8t+UlyCkt9YqMLhYYCsV mUvfpcCDSIIm9MkebkzphXC22FfuzHBz/qWzyPcZbykvKrV6lvxeH0qT3qrQsCNddOJX 7ebfYt+IjNTBO7HAaZXgm9We9Jel+Iux6bK/FhwjM7/ip7AL7M9aYCqm9onViw8p3hWd ans19xVJmrtuTtFAM5SrADl7QziOd1x1FKoMKUSBghpmdurtXlhtDS9X86s2p1wXg9P/ 1jPxhxuTR2XX8IVv7WAxMwI/mw44X/waK4rL0uKqBWb/adMziQNsgo6T31FBZYbOnTEj u2Og== X-Gm-Message-State: AOAM533SEkkunEje6Q0RohcrxdcnkCpELRysonEhrTC1Q3yynlECZM8S 7lm6VIySWw4LsribPYV/If9Wha6LVBz6sAqQH6c= X-Google-Smtp-Source: ABdhPJydw13iQ9B5q81Px8W3R+OZXO2wPlxvontCOvnnKaWO5tOhYWFAenan2mUZOZgLkc6o+nEe5Q== X-Received: by 2002:a1c:7f8c:: with SMTP id a134mr15711577wmd.184.1608569308687; Mon, 21 Dec 2020 08:48:28 -0800 (PST) Received: from alco.lan ([80.71.134.83]) by smtp.gmail.com with ESMTPSA id o125sm24581109wmo.30.2020.12.21.08.48.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Dec 2020 08:48:28 -0800 (PST) From: Ricardo Ribalda To: Laurent Pinchart , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ricardo Ribalda Subject: [PATCH v5 09/12] media: uvcvideo: Implement UVC_QUIRK_PRIVACY_DURING_STREAM Date: Mon, 21 Dec 2020 17:48:16 +0100 Message-Id: <20201221164819.792019-10-ribalda@chromium.org> X-Mailer: git-send-email 2.29.2.684.gfbc64c5ab5-goog In-Reply-To: <20201221164819.792019-1-ribalda@chromium.org> References: <20201221164819.792019-1-ribalda@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some devices, can only read the privacy_pin if the device is streaming. This patch implement a quirk for such devices, in order to avoid invalid reads and/or spurious events. Signed-off-by: Ricardo Ribalda --- drivers/media/usb/uvc/uvc_driver.c | 57 ++++++++++++++++++++++++++++-- drivers/media/usb/uvc/uvc_queue.c | 3 ++ drivers/media/usb/uvc/uvcvideo.h | 4 +++ 3 files changed, 61 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 72516101fdd0..7af37d4bd60a 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -7,6 +7,7 @@ */ #include +#include #include #include #include @@ -1472,6 +1473,17 @@ static int uvc_parse_control(struct uvc_device *dev) /* ----------------------------------------------------------------------------- * Privacy GPIO */ +static bool uvc_gpio_is_streaming(struct uvc_device *dev) +{ + struct uvc_streaming *streaming; + + list_for_each_entry(streaming, &dev->streams, list) { + if (uvc_queue_streaming(&streaming->queue)) + return true; + } + + return false; +} static u8 uvc_gpio_update_value(struct uvc_device *dev, @@ -1499,7 +1511,12 @@ static int uvc_gpio_get_cur(struct uvc_device *dev, struct uvc_entity *entity, if (cs != UVC_CT_PRIVACY_CONTROL || size < 1) return -EINVAL; + if ((dev->quirks & UVC_QUIRK_PRIVACY_DURING_STREAM) && + !uvc_gpio_is_streaming(dev)) + return -EBUSY; + *(uint8_t *)data = uvc_gpio_update_value(dev, entity); + return 0; } @@ -1528,19 +1545,50 @@ static struct uvc_entity *uvc_gpio_find_entity(struct uvc_device *dev) return NULL; } -static irqreturn_t uvc_gpio_irq(int irq, void *data) +void uvc_privacy_gpio_event(struct uvc_device *dev) { - struct uvc_device *dev = data; struct uvc_entity *unit; + unit = uvc_gpio_find_entity(dev); if (!unit) - return IRQ_HANDLED; + return; uvc_gpio_update_value(dev, unit); +} + +static irqreturn_t uvc_gpio_irq(int irq, void *data) +{ + struct uvc_device *dev = data; + + /* Ignore privacy events during streamoff */ + if (dev->quirks & UVC_QUIRK_PRIVACY_DURING_STREAM) + if (!uvc_gpio_is_streaming(dev)) + return IRQ_HANDLED; + + uvc_privacy_gpio_event(dev); + return IRQ_HANDLED; } +static const struct dmi_system_id privacy_valid_during_streamon[] = { + { + .ident = "HP Elite c1030 Chromebook", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "HP"), + DMI_MATCH(DMI_PRODUCT_NAME, "Jinlon"), + }, + }, + { + .ident = "HP Pro c640 Chromebook", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "HP"), + DMI_MATCH(DMI_PRODUCT_NAME, "Dratini"), + }, + }, + { } /* terminate list */ +}; + static int uvc_gpio_parse(struct uvc_device *dev) { struct uvc_entity *unit; @@ -1577,6 +1625,9 @@ static int uvc_gpio_parse(struct uvc_device *dev) list_add_tail(&unit->list, &dev->entities); + if (dmi_check_system(privacy_valid_during_streamon)) + dev->quirks |= UVC_QUIRK_PRIVACY_DURING_STREAM; + return 0; } diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c index cd60c6c1749e..e800d491303f 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -337,9 +337,12 @@ int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf, int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type) { int ret; + struct uvc_streaming *stream = uvc_queue_to_stream(queue); mutex_lock(&queue->mutex); ret = vb2_streamon(&queue->queue, type); + if (stream->dev->quirks & UVC_QUIRK_PRIVACY_DURING_STREAM) + uvc_privacy_gpio_event(stream->dev); mutex_unlock(&queue->mutex); return ret; diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 079a407ebba5..32c1ba246d97 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -209,6 +209,7 @@ #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 #define UVC_QUIRK_FORCE_Y8 0x00000800 #define UVC_QUIRK_FORCE_BPP 0x00001000 +#define UVC_QUIRK_PRIVACY_DURING_STREAM 0x00002000 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 @@ -826,6 +827,9 @@ extern const struct v4l2_file_operations uvc_fops; int uvc_mc_register_entities(struct uvc_video_chain *chain); void uvc_mc_cleanup_entity(struct uvc_entity *entity); +/* Privacy gpio */ +void uvc_privacy_gpio_event(struct uvc_device *dev); + /* Video */ int uvc_video_init(struct uvc_streaming *stream); int uvc_video_suspend(struct uvc_streaming *stream); -- 2.29.2.684.gfbc64c5ab5-goog