LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Ricardo Ribalda <ribalda@chromium.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Tomasz Figa <tfiga@chromium.org>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	senozhatsky@chromium.org, Hans Verkuil <hverkuil@xs4all.nl>
Cc: Ricardo Ribalda <ribalda@chromium.org>
Subject: [PATCH v3 5/8] media: uvcvideo: refactor __uvc_ctrl_add_mapping
Date: Fri, 12 Mar 2021 13:48:27 +0100	[thread overview]
Message-ID: <20210312124830.1344255-6-ribalda@chromium.org> (raw)
In-Reply-To: <20210312124830.1344255-1-ribalda@chromium.org>

Pass the chain instead of the device. We want to keed the reference to
the chain that controls belong to.

We need to delay the initialization of the controls after the chains
have been initialized.

This is a cleanup needed for the next patches.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_ctrl.c   | 41 ++++++++++++++++++++----------
 drivers/media/usb/uvc/uvc_driver.c |  8 +++---
 2 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index b3dde98499f4..90ecdc24d70a 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -2057,7 +2057,7 @@ static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
 /*
  * Add a control mapping to a given control.
  */
-static int __uvc_ctrl_add_mapping(struct uvc_device *dev,
+static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 	struct uvc_control *ctrl, const struct uvc_control_mapping *mapping)
 {
 	struct uvc_control_mapping *map;
@@ -2086,7 +2086,7 @@ static int __uvc_ctrl_add_mapping(struct uvc_device *dev,
 		map->set = uvc_set_le_value;
 
 	list_add_tail(&map->list, &ctrl->info.mappings);
-	uvc_dbg(dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n",
+	uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n",
 		map->name, ctrl->info.entity, ctrl->info.selector);
 
 	return 0;
@@ -2168,7 +2168,7 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 		goto done;
 	}
 
-	ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping);
+	ret = __uvc_ctrl_add_mapping(chain, ctrl, mapping);
 	if (ret < 0)
 		atomic_dec(&dev->nmappings);
 
@@ -2244,7 +2244,8 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
  * Add control information and hardcoded stock control mappings to the given
  * device.
  */
-static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl)
+static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
+			       struct uvc_control *ctrl)
 {
 	const struct uvc_control_info *info = uvc_ctrls;
 	const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls);
@@ -2263,14 +2264,14 @@ static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl)
 	for (; info < iend; ++info) {
 		if (uvc_entity_match_guid(ctrl->entity, info->entity) &&
 		    ctrl->index == info->index) {
-			uvc_ctrl_add_info(dev, ctrl, info);
+			uvc_ctrl_add_info(chain->dev, ctrl, info);
 			/*
 			 * Retrieve control flags from the device. Ignore errors
 			 * and work with default flag values from the uvc_ctrl
 			 * array when the device doesn't properly implement
 			 * GET_INFO on standard controls.
 			 */
-			uvc_ctrl_get_flags(dev, ctrl, &ctrl->info);
+			uvc_ctrl_get_flags(chain->dev, ctrl, &ctrl->info);
 			break;
 		 }
 	}
@@ -2281,22 +2282,20 @@ static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl)
 	for (; mapping < mend; ++mapping) {
 		if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
 		    ctrl->info.selector == mapping->selector)
-			__uvc_ctrl_add_mapping(dev, ctrl, mapping);
+			__uvc_ctrl_add_mapping(chain, ctrl, mapping);
 	}
 }
 
 /*
  * Initialize device controls.
  */
-int uvc_ctrl_init_device(struct uvc_device *dev)
+static int uvc_ctrl_init_chain(struct uvc_video_chain *chain)
 {
 	struct uvc_entity *entity;
 	unsigned int i;
 
-	INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work);
-
 	/* Walk the entities list and instantiate controls */
-	list_for_each_entry(entity, &dev->entities, list) {
+	list_for_each_entry(entity, &chain->entities, chain) {
 		struct uvc_control *ctrl;
 		unsigned int bControlSize = 0, ncontrols;
 		u8 *bmControls = NULL;
@@ -2316,7 +2315,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
 		}
 
 		/* Remove bogus/blacklisted controls */
-		uvc_ctrl_prune_entity(dev, entity);
+		uvc_ctrl_prune_entity(chain->dev, entity);
 
 		/* Count supported controls and allocate the controls array */
 		ncontrols = memweight(bmControls, bControlSize);
@@ -2338,7 +2337,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
 			ctrl->entity = entity;
 			ctrl->index = i;
 
-			uvc_ctrl_init_ctrl(dev, ctrl);
+			uvc_ctrl_init_ctrl(chain, ctrl);
 			ctrl++;
 		}
 	}
@@ -2346,6 +2345,22 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
 	return 0;
 }
 
+int uvc_ctrl_init_device(struct uvc_device *dev)
+{
+	struct uvc_video_chain *chain;
+	int ret;
+
+	INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work);
+
+	list_for_each_entry(chain, &dev->chains, list) {
+		ret = uvc_ctrl_init_chain(chain);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
 /*
  * Cleanup device controls.
  */
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 30ef2a3110f7..35873cf2773d 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -2423,14 +2423,14 @@ static int uvc_probe(struct usb_interface *intf,
 	if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
 		goto error;
 
-	/* Initialize controls. */
-	if (uvc_ctrl_init_device(dev) < 0)
-		goto error;
-
 	/* Scan the device for video chains. */
 	if (uvc_scan_device(dev) < 0)
 		goto error;
 
+	/* Initialize controls. */
+	if (uvc_ctrl_init_device(dev) < 0)
+		goto error;
+
 	/* Register video device nodes. */
 	if (uvc_register_chains(dev) < 0)
 		goto error;
-- 
2.31.0.rc2.261.g7f71774620-goog


  parent reply	other threads:[~2021-03-12 12:49 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-12 12:48 [PATCH v3 0/8] Fix v4l2-compliance errors Ricardo Ribalda
2021-03-12 12:48 ` [PATCH v3 1/8] media: v4l2-ioctl: Fix check_ext_ctrls Ricardo Ribalda
2021-03-12 12:48 ` [PATCH v3 2/8] media: uvcvideo: Set capability in s_param Ricardo Ribalda
2021-03-12 12:48 ` [PATCH v3 3/8] media: uvcvideo: Return -EIO for control errors Ricardo Ribalda
2021-03-12 12:48 ` [PATCH v3 4/8] media: uvcvideo: set error_idx to count on EACCESS Ricardo Ribalda
2021-03-12 22:42   ` Laurent Pinchart
2021-03-12 12:48 ` Ricardo Ribalda [this message]
2021-03-12 22:40   ` [PATCH v3 5/8] media: uvcvideo: refactor __uvc_ctrl_add_mapping Laurent Pinchart
2021-03-12 12:48 ` [PATCH v3 6/8] media: uvcvideo: Add support for V4L2_CTRL_TYPE_CTRL_CLASS Ricardo Ribalda
2021-03-12 22:44   ` Laurent Pinchart
2021-03-12 12:48 ` [PATCH v3 7/8] media: uvcvideo: Set a different name for the metadata entity Ricardo Ribalda
2021-03-12 22:27   ` Laurent Pinchart
2021-03-12 23:17     ` Ricardo Ribalda Delgado
2021-03-12 23:28       ` Laurent Pinchart
2021-03-12 23:47         ` Ricardo Ribalda Delgado
2021-03-12 12:48 ` [PATCH v3 8/8] uvc: use vb2 ioctl and fop helpers Ricardo Ribalda
2021-03-12 13:59   ` Hans Verkuil

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210312124830.1344255-6-ribalda@chromium.org \
    --to=ribalda@chromium.org \
    --cc=hverkuil@xs4all.nl \
    --cc=laurent.pinchart@ideasonboard.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=mchehab@kernel.org \
    --cc=senozhatsky@chromium.org \
    --cc=tfiga@chromium.org \
    --subject='Re: [PATCH v3 5/8] media: uvcvideo: refactor __uvc_ctrl_add_mapping' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).