Hi Wenyou, [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v4.14-rc1 next-20170918] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Wenyou-Yang/media-ov7670-Add-entity-init-and-power-operation/20170918-145527 base: git://linuxtv.org/media_tree.git master config: x86_64-randconfig-x003-201738 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): drivers/media/i2c/ov7670.c: In function 'ov7670_set_fmt': >> drivers/media/i2c/ov7670.c:1006:3: warning: ISO C90 forbids mixed >> declarations and code [-Wdeclaration-after-statement] struct v4l2_mbus_framefmt *mbus_fmt; ^~~~~~ vim +1006 drivers/media/i2c/ov7670.c 984 985 /* 986 * Set a format. 987 */ 988 static int ov7670_set_fmt(struct v4l2_subdev *sd, 989 struct v4l2_subdev_pad_config *cfg, 990 struct v4l2_subdev_format *format) 991 { 992 struct ov7670_format_struct *ovfmt; 993 struct ov7670_win_size *wsize; 994 struct ov7670_info *info = to_state(sd); 995 unsigned char com7; 996 int ret; 997 998 if (format->pad) 999 return -EINVAL; 1000 1001 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 1002 ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL); 1003 if (ret) 1004 return ret; 1005 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API > 1006 struct v4l2_mbus_framefmt *mbus_fmt; 1007 1008 mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad); 1009 *mbus_fmt = format->format; 1010 return 0; 1011 #else 1012 return -ENOTTY; 1013 #endif 1014 } 1015 1016 ret = ov7670_try_fmt_internal(sd, &format->format, &ovfmt, &wsize); 1017 1018 if (ret) 1019 return ret; 1020 /* 1021 * COM7 is a pain in the ass, it doesn't like to be read then 1022 * quickly written afterward. But we have everything we need 1023 * to set it absolutely here, as long as the format-specific 1024 * register sets list it first. 1025 */ 1026 com7 = ovfmt->regs[0].value; 1027 com7 |= wsize->com7_bit; 1028 ov7670_write(sd, REG_COM7, com7); 1029 /* 1030 * Now write the rest of the array. Also store start/stops 1031 */ 1032 ov7670_write_array(sd, ovfmt->regs + 1); 1033 ov7670_set_hw(sd, wsize->hstart, wsize->hstop, wsize->vstart, 1034 wsize->vstop); 1035 ret = 0; 1036 if (wsize->regs) 1037 ret = ov7670_write_array(sd, wsize->regs); 1038 info->fmt = ovfmt; 1039 1040 /* 1041 * If we're running RGB565, we must rewrite clkrc after setting 1042 * the other parameters or the image looks poor. If we're *not* 1043 * doing RGB565, we must not rewrite clkrc or the image looks 1044 * *really* poor. 1045 * 1046 * (Update) Now that we retain clkrc state, we should be able 1047 * to write it unconditionally, and that will make the frame 1048 * rate persistent too. 1049 */ 1050 if (ret == 0) 1051 ret = ov7670_write(sd, REG_CLKRC, info->clkrc); 1052 return 0; 1053 } 1054 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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