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>

diff --git a/drivers/media/platform/vivid/vivid-core.h b/drivers/media/platform/vivid/vivid-core.h
index 50802e650750fed84b753528c4d6ef688d5e858a..c90e4a0ab94ed653dcfb92980b17e1f615b206df 100644 (file)
--- a/drivers/media/platform/vivid/vivid-core.h
+++ b/drivers/media/platform/vivid/vivid-core.h
@@ -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;

diff --git a/drivers/media/platform/vivid/vivid-ctrls.c b/drivers/media/platform/vivid/vivid-ctrls.c
index 34731f71cc0077f4e66bb344c2e6737833e8b44e..3f9d354827af35de8b9b986f5f0bc0ab466a9060 100644 (file)
--- a/drivers/media/platform/vivid/vivid-ctrls.c
+++ b/drivers/media/platform/vivid/vivid-ctrls.c
@@ -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);
 }