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media: vivid: fix module load error when enabling fb and no_error_inj=1 

If the framebuffer is enabled and error injection is disabled, then
creating the controls for the video output device would fail with an
error.

This is because the Clear Framebuffer control uses the 'vivid control
class' and that control class isn't added if error injection is disabled.

In addition, this control was added to e.g. vbi devices as well, which
makes no sense.

Move this control to its own control handler and handle it correctly.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: <stable@vger.kernel.org>      # for v4.15 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2018-01-25 06:57:45 -05:00 committed by Mauro Carvalho Chehab
parent 0f3827351e
commit 0fa2c5f954
2 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/media/platform/vivid/vivid-core.h
View File

@ -154,6 +154,7 @@ struct vivid_dev {
struct v4l2_ctrl_handler ctrl_hdl_streaming;
struct v4l2_ctrl_handler ctrl_hdl_sdtv_cap;
struct v4l2_ctrl_handler ctrl_hdl_loop_cap;
struct v4l2_ctrl_handler ctrl_hdl_fb;
struct video_device vid_cap_dev;
struct v4l2_ctrl_handler ctrl_hdl_vid_cap;
struct video_device vid_out_dev;

35
drivers/media/platform/vivid/vivid-ctrls.c
View File

@ -120,9 +120,6 @@ static int vivid_user_gen_s_ctrl(struct v4l2_ctrl *ctrl)
clear_bit(V4L2_FL_REGISTERED, &dev->radio_rx_dev.flags);
clear_bit(V4L2_FL_REGISTERED, &dev->radio_tx_dev.flags);
break;
case VIVID_CID_CLEAR_FB:
vivid_clear_fb(dev);
break;
case VIVID_CID_BUTTON:
dev->button_pressed = 30;
break;
@ -274,8 +271,28 @@ static const struct v4l2_ctrl_config vivid_ctrl_disconnect = {
.type = V4L2_CTRL_TYPE_BUTTON,
};
/* Framebuffer Controls */
static int vivid_fb_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vivid_dev *dev = container_of(ctrl->handler,
struct vivid_dev, ctrl_hdl_fb);
switch (ctrl->id) {
case VIVID_CID_CLEAR_FB:
vivid_clear_fb(dev);
break;
}
return 0;
}
static const struct v4l2_ctrl_ops vivid_fb_ctrl_ops = {
.s_ctrl = vivid_fb_s_ctrl,
};
static const struct v4l2_ctrl_config vivid_ctrl_clear_fb = {
.ops = &vivid_user_gen_ctrl_ops,
.ops = &vivid_fb_ctrl_ops,
.id = VIVID_CID_CLEAR_FB,
.name = "Clear Framebuffer",
.type = V4L2_CTRL_TYPE_BUTTON,
@ -1357,6 +1374,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
struct v4l2_ctrl_handler *hdl_streaming = &dev->ctrl_hdl_streaming;
struct v4l2_ctrl_handler *hdl_sdtv_cap = &dev->ctrl_hdl_sdtv_cap;
struct v4l2_ctrl_handler *hdl_loop_cap = &dev->ctrl_hdl_loop_cap;
struct v4l2_ctrl_handler *hdl_fb = &dev->ctrl_hdl_fb;
struct v4l2_ctrl_handler *hdl_vid_cap = &dev->ctrl_hdl_vid_cap;
struct v4l2_ctrl_handler *hdl_vid_out = &dev->ctrl_hdl_vid_out;
struct v4l2_ctrl_handler *hdl_vbi_cap = &dev->ctrl_hdl_vbi_cap;
@ -1384,10 +1402,12 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_new_custom(hdl_sdtv_cap, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_loop_cap, 1);
v4l2_ctrl_new_custom(hdl_loop_cap, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_fb, 1);
v4l2_ctrl_new_custom(hdl_fb, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_vid_cap, 55);
v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_vid_out, 26);
if (!no_error_inj)
if (!no_error_inj || dev->has_fb)
v4l2_ctrl_new_custom(hdl_vid_out, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_vbi_cap, 21);
v4l2_ctrl_new_custom(hdl_vbi_cap, &vivid_ctrl_class, NULL);
@ -1561,7 +1581,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_new_custom(hdl_loop_cap, &vivid_ctrl_loop_video, NULL);
if (dev->has_fb)
v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_clear_fb, NULL);
v4l2_ctrl_new_custom(hdl_fb, &vivid_ctrl_clear_fb, NULL);
if (dev->has_radio_rx) {
v4l2_ctrl_new_custom(hdl_radio_rx, &vivid_ctrl_radio_hw_seek_mode, NULL);
@ -1658,6 +1678,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_add_handler(hdl_vid_cap, hdl_streaming, NULL);
v4l2_ctrl_add_handler(hdl_vid_cap, hdl_sdtv_cap, NULL);
v4l2_ctrl_add_handler(hdl_vid_cap, hdl_loop_cap, NULL);
v4l2_ctrl_add_handler(hdl_vid_cap, hdl_fb, NULL);
if (hdl_vid_cap->error)
return hdl_vid_cap->error;
dev->vid_cap_dev.ctrl_handler = hdl_vid_cap;
@ -1666,6 +1687,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_add_handler(hdl_vid_out, hdl_user_gen, NULL);
v4l2_ctrl_add_handler(hdl_vid_out, hdl_user_aud, NULL);
v4l2_ctrl_add_handler(hdl_vid_out, hdl_streaming, NULL);
v4l2_ctrl_add_handler(hdl_vid_out, hdl_fb, NULL);
if (hdl_vid_out->error)
return hdl_vid_out->error;
dev->vid_out_dev.ctrl_handler = hdl_vid_out;
@ -1725,4 +1747,5 @@ void vivid_free_controls(struct vivid_dev *dev)
v4l2_ctrl_handler_free(&dev->ctrl_hdl_streaming);
v4l2_ctrl_handler_free(&dev->ctrl_hdl_sdtv_cap);
v4l2_ctrl_handler_free(&dev->ctrl_hdl_loop_cap);
v4l2_ctrl_handler_free(&dev->ctrl_hdl_fb);
}