[hverkuil-media-tree:outreachy-vivid 51/53] drivers/media/test-drivers/vivid/vivid-ctrls.c:1094:57: warning: variable 'dev' is uninitialized when used within its own initialization

[kernel test robot <lkp@intel.com>]

tree:   git://linuxtv.org/hverkuil/media_tree.git outreachy-vivid
head:   4964cefc537c29dc9946430b8334a6de73a937b4
commit: a9ce0ed91ef0b798d3e8cefb238e33b2ea9a597d [51/53] media: vivid: Remove loop video ctrl
config: arm-defconfig (https://download.01.org/0day-ci/archive/20240315/202403150440.BSFRkvlO-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240315/202403150440.BSFRkvlO-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403150440.BSFRkvlO-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/test-drivers/vivid/vivid-ctrls.c:1094:57: warning: variable 'dev' is uninitialized when used within its own initialization [-Wuninitialized]
                           struct vivid_dev *dev = vivid_output_is_connected_to(dev);
                                             ~~~                                ^~~
   1 warning generated.


vim +/dev +1094 drivers/media/test-drivers/vivid/vivid-ctrls.c

  1056	
  1057	static int vivid_vid_out_s_ctrl(struct v4l2_ctrl *ctrl)
  1058	{
  1059		struct vivid_dev *dev = container_of(ctrl->handler, struct vivid_dev, ctrl_hdl_vid_out);
  1060		struct v4l2_bt_timings *bt = &dev->dv_timings_out.bt;
  1061		u32 display_present = 0;
  1062		unsigned int i, j, bus_idx;
  1063	
  1064		switch (ctrl->id) {
  1065		case VIVID_CID_HAS_CROP_OUT:
  1066			dev->has_crop_out = ctrl->val;
  1067			vivid_update_format_out(dev);
  1068			break;
  1069		case VIVID_CID_HAS_COMPOSE_OUT:
  1070			dev->has_compose_out = ctrl->val;
  1071			vivid_update_format_out(dev);
  1072			break;
  1073		case VIVID_CID_HAS_SCALER_OUT:
  1074			dev->has_scaler_out = ctrl->val;
  1075			vivid_update_format_out(dev);
  1076			break;
  1077		case V4L2_CID_DV_TX_MODE:
  1078			dev->dvi_d_out = ctrl->val == V4L2_DV_TX_MODE_DVI_D;
  1079			if (!vivid_is_hdmi_out(dev))
  1080				break;
  1081			if (!dev->dvi_d_out && (bt->flags & V4L2_DV_FL_IS_CE_VIDEO)) {
  1082				if (bt->width == 720 && bt->height <= 576)
  1083					dev->colorspace_out = V4L2_COLORSPACE_SMPTE170M;
  1084				else
  1085					dev->colorspace_out = V4L2_COLORSPACE_REC709;
  1086				dev->quantization_out = V4L2_QUANTIZATION_DEFAULT;
  1087			} else {
  1088				dev->colorspace_out = V4L2_COLORSPACE_SRGB;
  1089				dev->quantization_out = dev->dvi_d_out ?
  1090						V4L2_QUANTIZATION_LIM_RANGE :
  1091						V4L2_QUANTIZATION_DEFAULT;
  1092			}
  1093			if (vivid_output_is_connected_to(dev)) {
> 1094				struct vivid_dev *dev = vivid_output_is_connected_to(dev);
  1095	
  1096				vivid_send_source_change(dev, HDMI);
  1097			}
  1098			break;
  1099		case VIVID_CID_DISPLAY_PRESENT:
  1100			if (dev->output_type[dev->output] != HDMI)
  1101				break;
  1102	
  1103			dev->display_present[dev->output] = ctrl->val;
  1104			for (i = 0, j = 0; i < dev->num_outputs; i++)
  1105				if (dev->output_type[i] == HDMI)
  1106					display_present |=
  1107						dev->display_present[i] << j++;
  1108	
  1109			__v4l2_ctrl_s_ctrl(dev->ctrl_tx_rxsense, display_present);
  1110	
  1111			if (dev->edid_blocks) {
  1112				__v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present,
  1113						   display_present);
  1114				__v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug,
  1115						   display_present);
  1116			}
  1117	
  1118			bus_idx = dev->cec_output2bus_map[dev->output];
  1119			if (!dev->cec_tx_adap[bus_idx])
  1120				break;
  1121	
  1122			if (ctrl->val && dev->edid_blocks)
  1123				cec_s_phys_addr(dev->cec_tx_adap[bus_idx],
  1124						dev->cec_tx_adap[bus_idx]->phys_addr,
  1125						false);
  1126			else
  1127				cec_phys_addr_invalidate(dev->cec_tx_adap[bus_idx]);
  1128	
  1129			break;
  1130		}
  1131		return 0;
  1132	}
  1133	

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