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SubjectRe: [PATCH v3 2/2] media: ov2680: Add Omnivision OV2680 sensor driver
Hi Rui,

I love your patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[cannot apply to next-20180314]
[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/Rui-Miguel-Silva/media-Introduce-Omnivision-OV2680-driver/20180315-020617
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

drivers/media/i2c/ov2680.c: In function 'ov2680_set_fmt':
drivers/media/i2c/ov2680.c:713:9: error: implicit declaration of function 'v4l2_find_nearest_size'; did you mean 'v4l2_find_nearest_format'? [-Werror=implicit-function-declaration]
mode = v4l2_find_nearest_size(ov2680_mode_data,
^~~~~~~~~~~~~~~~~~~~~~
v4l2_find_nearest_format
drivers/media/i2c/ov2680.c:714:195: error: 'width' undeclared (first use in this function)
ARRAY_SIZE(ov2680_mode_data), width,
^
drivers/media/i2c/ov2680.c:714:195: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/media/i2c/ov2680.c:715:11: error: 'height' undeclared (first use in this function); did you mean '__iget'?
height, fmt->width, fmt->height);
^~~~~~
__iget
cc1: some warnings being treated as errors

vim +715 drivers/media/i2c/ov2680.c

693
694 static int ov2680_set_fmt(struct v4l2_subdev *sd,
695 struct v4l2_subdev_pad_config *cfg,
696 struct v4l2_subdev_format *format)
697 {
698 struct ov2680_dev *sensor = to_ov2680_dev(sd);
699 struct v4l2_mbus_framefmt *fmt = &format->format;
700 const struct ov2680_mode_info *mode;
701 int ret = 0;
702
703 if (format->pad != 0)
704 return -EINVAL;
705
706 mutex_lock(&sensor->lock);
707
708 if (sensor->is_streaming) {
709 ret = -EBUSY;
710 goto unlock;
711 }
712
> 713 mode = v4l2_find_nearest_size(ov2680_mode_data,
714 ARRAY_SIZE(ov2680_mode_data), width,
> 715 height, fmt->width, fmt->height);
716 if (!mode) {
717 ret = -EINVAL;
718 goto unlock;
719 }
720
721 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
722 fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
723
724 *fmt = format->format;
725 goto unlock;
726 }
727
728 fmt->width = mode->width;
729 fmt->height = mode->height;
730 fmt->code = sensor->fmt.code;
731 fmt->colorspace = sensor->fmt.colorspace;
732
733 sensor->current_mode = mode;
734 sensor->fmt = format->format;
735 sensor->mode_pending_changes = true;
736
737 unlock:
738 mutex_unlock(&sensor->lock);
739
740 return ret;
741 }
742

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