media: v4l: ctrls: Add debug messages
Currently, the v4l2 control code is a bit silent on errors. Add debug messages on (hopefully) most of the error paths. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia
Mauro Carvalho Chehab
Родитель
d4a6a9537b
Коммит
173f6eacc8
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@ -288,6 +288,7 @@ Mask Description
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0x08 Log the read and write file operations and the VIDIOC_QBUF and
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VIDIOC_DQBUF ioctls.
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0x10 Log the poll file operation.
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0x20 Log error and messages in the control operations.
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===== ================================================================
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Video device cleanup
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@ -1020,8 +1020,8 @@ static int isp_video_check_external_subdevs(struct isp_video *video,
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ctrls.count = 1;
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ctrls.controls = &ctrl;
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ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, NULL, &ctrls);
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ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &video->video,
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NULL, &ctrls);
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if (ret < 0) {
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dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
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pipe->external->name);
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@ -6,6 +6,8 @@
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*/
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#define pr_fmt(fmt) "v4l2-ctrls: " fmt
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#include <linux/ctype.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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@ -16,6 +18,12 @@
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#include <media/v4l2-event.h>
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#include <media/v4l2-dev.h>
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#define dprintk(vdev, fmt, arg...) do { \
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if (!WARN_ON(!(vdev)) && ((vdev)->dev_debug & V4L2_DEV_DEBUG_CTRL)) \
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printk(KERN_DEBUG pr_fmt("%s: %s: " fmt), \
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__func__, video_device_node_name(vdev), ##arg); \
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} while (0)
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#define has_op(master, op) \
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(master->ops && master->ops->op)
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#define call_op(master, op) \
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@ -3260,6 +3268,7 @@ static int v4l2_ctrl_request_bind(struct media_request *req,
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static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
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struct v4l2_ext_controls *cs,
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struct v4l2_ctrl_helper *helpers,
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struct video_device *vdev,
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bool get)
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{
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struct v4l2_ctrl_helper *h;
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@ -3277,20 +3286,31 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
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if (cs->which &&
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cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
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cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
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V4L2_CTRL_ID2WHICH(id) != cs->which)
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V4L2_CTRL_ID2WHICH(id) != cs->which) {
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dprintk(vdev,
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"invalid which 0x%x or control id 0x%x\n",
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cs->which, id);
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return -EINVAL;
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}
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/* Old-style private controls are not allowed for
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extended controls */
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if (id >= V4L2_CID_PRIVATE_BASE)
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if (id >= V4L2_CID_PRIVATE_BASE) {
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dprintk(vdev,
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"old-style private controls not allowed\n");
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return -EINVAL;
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}
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ref = find_ref_lock(hdl, id);
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if (ref == NULL)
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if (ref == NULL) {
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dprintk(vdev, "cannot find control id 0x%x\n", id);
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return -EINVAL;
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}
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h->ref = ref;
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ctrl = ref->ctrl;
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if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
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if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) {
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dprintk(vdev, "control id 0x%x is disabled\n", id);
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return -EINVAL;
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}
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if (ctrl->cluster[0]->ncontrols > 1)
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have_clusters = true;
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@ -3300,10 +3320,17 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
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unsigned tot_size = ctrl->elems * ctrl->elem_size;
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if (c->size < tot_size) {
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/*
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* In the get case the application first
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* queries to obtain the size of the control.
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*/
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if (get) {
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c->size = tot_size;
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return -ENOSPC;
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}
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dprintk(vdev,
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"pointer control id 0x%x size too small, %d bytes but %d bytes needed\n",
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id, c->size, tot_size);
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return -EFAULT;
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}
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c->size = tot_size;
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@ -3364,7 +3391,8 @@ static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
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/* Get extended controls. Allocates the helpers array if needed. */
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static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
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struct v4l2_ext_controls *cs)
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struct v4l2_ext_controls *cs,
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struct video_device *vdev)
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{
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struct v4l2_ctrl_helper helper[4];
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struct v4l2_ctrl_helper *helpers = helper;
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@ -3390,7 +3418,7 @@ static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
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return -ENOMEM;
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}
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ret = prepare_ext_ctrls(hdl, cs, helpers, true);
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ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, true);
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cs->error_idx = cs->count;
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for (i = 0; !ret && i < cs->count; i++)
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@ -3483,8 +3511,8 @@ v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
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return obj;
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}
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int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
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struct v4l2_ext_controls *cs)
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int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
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struct media_device *mdev, struct v4l2_ext_controls *cs)
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{
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struct media_request_object *obj = NULL;
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struct media_request *req = NULL;
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@ -3520,7 +3548,7 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
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req_obj);
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}
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ret = v4l2_g_ext_ctrls_common(hdl, cs);
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ret = v4l2_g_ext_ctrls_common(hdl, cs, vdev);
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if (obj) {
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media_request_unlock_for_access(req);
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@ -3663,7 +3691,9 @@ static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
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/* Validate controls. */
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static int validate_ctrls(struct v4l2_ext_controls *cs,
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struct v4l2_ctrl_helper *helpers, bool set)
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struct v4l2_ctrl_helper *helpers,
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struct video_device *vdev,
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bool set)
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{
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unsigned i;
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int ret = 0;
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@ -3675,16 +3705,24 @@ static int validate_ctrls(struct v4l2_ext_controls *cs,
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cs->error_idx = i;
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if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
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if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) {
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dprintk(vdev,
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"control id 0x%x is read-only\n",
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ctrl->id);
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return -EACCES;
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}
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/* This test is also done in try_set_control_cluster() which
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is called in atomic context, so that has the final say,
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but it makes sense to do an up-front check as well. Once
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an error occurs in try_set_control_cluster() some other
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controls may have been set already and we want to do a
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best-effort to avoid that. */
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if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
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if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) {
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dprintk(vdev,
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"control id 0x%x is grabbed, cannot set\n",
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ctrl->id);
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return -EBUSY;
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}
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/*
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* Skip validation for now if the payload needs to be copied
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* from userspace into kernelspace. We'll validate those later.
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@ -3719,7 +3757,8 @@ static void update_from_auto_cluster(struct v4l2_ctrl *master)
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/* Try or try-and-set controls */
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static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
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struct v4l2_ctrl_handler *hdl,
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struct v4l2_ext_controls *cs, bool set)
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struct v4l2_ext_controls *cs,
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struct video_device *vdev, bool set)
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{
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struct v4l2_ctrl_helper helper[4];
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struct v4l2_ctrl_helper *helpers = helper;
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@ -3729,13 +3768,19 @@ static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
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cs->error_idx = cs->count;
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/* Default value cannot be changed */
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if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
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if (cs->which == V4L2_CTRL_WHICH_DEF_VAL) {
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dprintk(vdev, "%s: cannot change default value\n",
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video_device_node_name(vdev));
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return -EINVAL;
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}
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cs->which = V4L2_CTRL_ID2WHICH(cs->which);
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if (hdl == NULL)
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if (hdl == NULL) {
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dprintk(vdev, "%s: invalid null control handler\n",
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video_device_node_name(vdev));
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return -EINVAL;
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}
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if (cs->count == 0)
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return class_check(hdl, cs->which);
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@ -3746,9 +3791,9 @@ static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
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if (!helpers)
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return -ENOMEM;
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}
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ret = prepare_ext_ctrls(hdl, cs, helpers, false);
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ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, false);
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if (!ret)
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ret = validate_ctrls(cs, helpers, set);
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ret = validate_ctrls(cs, helpers, vdev, set);
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if (ret && set)
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cs->error_idx = cs->count;
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for (i = 0; !ret && i < cs->count; i++) {
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@ -3833,7 +3878,9 @@ static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
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}
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static int try_set_ext_ctrls(struct v4l2_fh *fh,
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struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
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struct v4l2_ctrl_handler *hdl,
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struct video_device *vdev,
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struct media_device *mdev,
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struct v4l2_ext_controls *cs, bool set)
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{
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struct media_request_object *obj = NULL;
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@ -3841,21 +3888,39 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh,
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int ret;
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if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
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if (!mdev || cs->request_fd < 0)
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if (!mdev) {
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dprintk(vdev, "%s: missing media device\n",
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video_device_node_name(vdev));
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return -EINVAL;
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}
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if (cs->request_fd < 0) {
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dprintk(vdev, "%s: invalid request fd %d\n",
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video_device_node_name(vdev), cs->request_fd);
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return -EINVAL;
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}
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req = media_request_get_by_fd(mdev, cs->request_fd);
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if (IS_ERR(req))
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if (IS_ERR(req)) {
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dprintk(vdev, "%s: cannot find request fd %d\n",
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video_device_node_name(vdev), cs->request_fd);
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return PTR_ERR(req);
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}
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ret = media_request_lock_for_update(req);
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if (ret) {
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dprintk(vdev, "%s: cannot lock request fd %d\n",
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video_device_node_name(vdev), cs->request_fd);
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media_request_put(req);
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return ret;
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}
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obj = v4l2_ctrls_find_req_obj(hdl, req, set);
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if (IS_ERR(obj)) {
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dprintk(vdev,
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"%s: cannot find request object for request fd %d\n",
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video_device_node_name(vdev),
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cs->request_fd);
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media_request_unlock_for_update(req);
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media_request_put(req);
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return PTR_ERR(obj);
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@ -3864,7 +3929,11 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh,
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req_obj);
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}
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ret = try_set_ext_ctrls_common(fh, hdl, cs, set);
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ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set);
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if (ret)
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dprintk(vdev,
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"%s: try_set_ext_ctrls_common failed (%d)\n",
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video_device_node_name(vdev), ret);
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if (obj) {
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media_request_unlock_for_update(req);
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@ -3875,17 +3944,22 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh,
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return ret;
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}
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int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
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int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
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struct video_device *vdev,
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struct media_device *mdev,
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struct v4l2_ext_controls *cs)
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{
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return try_set_ext_ctrls(NULL, hdl, mdev, cs, false);
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return try_set_ext_ctrls(NULL, hdl, vdev, mdev, cs, false);
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}
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EXPORT_SYMBOL(v4l2_try_ext_ctrls);
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int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
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struct media_device *mdev, struct v4l2_ext_controls *cs)
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int v4l2_s_ext_ctrls(struct v4l2_fh *fh,
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struct v4l2_ctrl_handler *hdl,
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struct video_device *vdev,
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struct media_device *mdev,
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struct v4l2_ext_controls *cs)
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{
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return try_set_ext_ctrls(fh, hdl, mdev, cs, true);
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return try_set_ext_ctrls(fh, hdl, vdev, mdev, cs, true);
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}
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EXPORT_SYMBOL(v4l2_s_ext_ctrls);
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@ -2186,9 +2186,11 @@ static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
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p->error_idx = p->count;
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if (vfh && vfh->ctrl_handler)
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return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_g_ext_ctrls(vfh->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (vfd->ctrl_handler)
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return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_g_ext_ctrls(vfd->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (ops->vidioc_g_ext_ctrls == NULL)
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return -ENOTTY;
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return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
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@ -2205,9 +2207,11 @@ static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
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p->error_idx = p->count;
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if (vfh && vfh->ctrl_handler)
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return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (vfd->ctrl_handler)
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return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (ops->vidioc_s_ext_ctrls == NULL)
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return -ENOTTY;
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return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
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@ -2224,9 +2228,11 @@ static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
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p->error_idx = p->count;
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if (vfh && vfh->ctrl_handler)
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return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_try_ext_ctrls(vfh->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (vfd->ctrl_handler)
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return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
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return v4l2_try_ext_ctrls(vfd->ctrl_handler,
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vfd, vfd->v4l2_dev->mdev, p);
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if (ops->vidioc_try_ext_ctrls == NULL)
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return -ENOTTY;
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return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
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@ -372,19 +372,19 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_g_ext_ctrls(vfh->ctrl_handler,
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sd->v4l2_dev->mdev, arg);
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vdev, sd->v4l2_dev->mdev, arg);
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case VIDIOC_S_EXT_CTRLS:
|
||||
if (!vfh->ctrl_handler)
|
||||
return -ENOTTY;
|
||||
return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
|
||||
sd->v4l2_dev->mdev, arg);
|
||||
vdev, sd->v4l2_dev->mdev, arg);
|
||||
|
||||
case VIDIOC_TRY_EXT_CTRLS:
|
||||
if (!vfh->ctrl_handler)
|
||||
return -ENOTTY;
|
||||
return v4l2_try_ext_ctrls(vfh->ctrl_handler,
|
||||
sd->v4l2_dev->mdev, arg);
|
||||
vdev, sd->v4l2_dev->mdev, arg);
|
||||
|
||||
case VIDIOC_DQEVENT:
|
||||
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
|
||||
|
|
|
|||
|
|
@ -1268,25 +1268,28 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
|
|||
* :ref:`VIDIOC_G_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
|
||||
*
|
||||
* @hdl: pointer to &struct v4l2_ctrl_handler
|
||||
* @vdev: pointer to &struct video_device
|
||||
* @mdev: pointer to &struct media_device
|
||||
* @c: pointer to &struct v4l2_ext_controls
|
||||
*
|
||||
* If hdl == NULL then they will all return -EINVAL.
|
||||
*/
|
||||
int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
|
||||
struct v4l2_ext_controls *c);
|
||||
int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
|
||||
struct media_device *mdev, struct v4l2_ext_controls *c);
|
||||
|
||||
/**
|
||||
* v4l2_try_ext_ctrls - Helper function to implement
|
||||
* :ref:`VIDIOC_TRY_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
|
||||
*
|
||||
* @hdl: pointer to &struct v4l2_ctrl_handler
|
||||
* @vdev: pointer to &struct video_device
|
||||
* @mdev: pointer to &struct media_device
|
||||
* @c: pointer to &struct v4l2_ext_controls
|
||||
*
|
||||
* If hdl == NULL then they will all return -EINVAL.
|
||||
*/
|
||||
int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
|
||||
struct video_device *vdev,
|
||||
struct media_device *mdev,
|
||||
struct v4l2_ext_controls *c);
|
||||
|
||||
|
|
@ -1296,12 +1299,14 @@ int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
|
|||
*
|
||||
* @fh: pointer to &struct v4l2_fh
|
||||
* @hdl: pointer to &struct v4l2_ctrl_handler
|
||||
* @vdev: pointer to &struct video_device
|
||||
* @mdev: pointer to &struct media_device
|
||||
* @c: pointer to &struct v4l2_ext_controls
|
||||
*
|
||||
* If hdl == NULL then they will all return -EINVAL.
|
||||
*/
|
||||
int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
|
||||
struct video_device *vdev,
|
||||
struct media_device *mdev,
|
||||
struct v4l2_ext_controls *c);
|
||||
|
||||
|
|
|
|||
|
|
@ -602,6 +602,8 @@ struct v4l2_ioctl_ops {
|
|||
#define V4L2_DEV_DEBUG_STREAMING 0x08
|
||||
/* Log poll() */
|
||||
#define V4L2_DEV_DEBUG_POLL 0x10
|
||||
/* Log controls */
|
||||
#define V4L2_DEV_DEBUG_CTRL 0x20
|
||||
|
||||
/* Video standard functions */
|
||||
|
||||
|
|
|
|||
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