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media: i2c: ov5675: add .get_selection support

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The sensor has 2592*1944 active pixels, surrounded by 16 active dummy
pixels and there are an additional 24 black rows "at the bottom".

                     [2624]
        +-----+------------------+-----+
        |     |     16 dummy     |     |
        +-----+------------------+-----+
        |     |                  |     |
        |     |     [2592]       |     |
        |     |                  |     |
        |16   |      valid       | 16  |[2000]
        |dummy|                  |dummy|
        |     |            [1944]|     |
        |     |                  |     |
        +-----+------------------+-----+
        |     |     16 dummy     |     |
        +-----+------------------+-----+
        |     |  24 black lines  |     |
        +-----+------------------+-----+

The top-left coordinate is gotten from the registers specified in the
modes which are identical for both currently supported modes.

There are currently two modes supported by this driver: 2592*1944 and
1296*972. The second mode is obtained thanks to subsampling while
keeping the same field of view (FoV). No cropping involved, hence the
harcoded values.

Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Quentin Schulz 2022-06-08 15:44:20 +02:00 committed by Mauro Carvalho Chehab
parent c8aa2111e1
commit 221827ee2d
1 changed files with 26 additions and 0 deletions
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26
drivers/media/i2c/ov5675.c
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@ -1123,6 +1123,31 @@ static int ov5675_get_format(struct v4l2_subdev *sd,
return 0;
}
static int ov5675_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_selection *sel)
{
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = 2624;
sel->r.height = 2000;
return 0;
case V4L2_SEL_TGT_CROP:
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r.top = 16;
sel->r.left = 16;
sel->r.width = 2592;
sel->r.height = 1944;
return 0;
}
return -EINVAL;
}
static int ov5675_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
@ -1172,6 +1197,7 @@ static const struct v4l2_subdev_video_ops ov5675_video_ops = {
static const struct v4l2_subdev_pad_ops ov5675_pad_ops = {
.set_fmt = ov5675_set_format,
.get_fmt = ov5675_get_format,
.get_selection = ov5675_get_selection,
.enum_mbus_code = ov5675_enum_mbus_code,
.enum_frame_size = ov5675_enum_frame_size,
};