From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomeu Vizoso Subject: [PATCH v2 4/7] [media] uvcvideo: Enable runtime PM of descendant devices Date: Fri, 3 Apr 2015 14:57:53 +0200 Message-ID: <1428065887-16017-5-git-send-email-tomeu.vizoso@collabora.com> References: <1428065887-16017-1-git-send-email-tomeu.vizoso@collabora.com> Return-path: In-Reply-To: <1428065887-16017-1-git-send-email-tomeu.vizoso@collabora.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-pm@vger.kernel.org Cc: Tomeu Vizoso , Laurent Pinchart , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-pm@vger.kernel.org So UVC devices can remain runtime-suspended when the system goes into a sleep state, they and all of their descendant devices need to have runtime PM enable. Signed-off-by: Tomeu Vizoso --- drivers/media/usb/uvc/uvc_driver.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index cf27006..687e5fb 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -1855,6 +1855,15 @@ static int uvc_register_chains(struct uvc_device *dev) return 0; } +static int uvc_pm_runtime_enable(struct device *dev, void *data) +{ + pm_runtime_enable(dev); + + device_for_each_child(dev, NULL, uvc_pm_runtime_enable); + + return 0; +} + /* ------------------------------------------------------------------------ * USB probe, disconnect, suspend and resume */ @@ -1959,6 +1968,8 @@ static int uvc_probe(struct usb_interface *intf, "supported.\n", ret); } + device_for_each_child(&dev->intf->dev, NULL, uvc_pm_runtime_enable); + uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); usb_enable_autosuspend(udev); return 0; -- 2.3.4