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Subject: media: ov2680: Implement selection support
Author: Hans de Goede <hdego...@redhat.com>
Date: Thu Aug 3 11:33:38 2023 +0200
Implement selection support. Modelled after ov5693 selection support,
but allow setting sizes smaller than crop-size through set_fmt() since
that was already allowed.
Acked-by: Rui Miguel Silva <rmf...@gmail.com>
Reviewed-by: Daniel Scally <dan.sca...@ideasonboard.com>
Signed-off-by: Hans de Goede <hdego...@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
drivers/media/i2c/ov2680.c | 153 +++++++++++++++++++++++++++++++++++++++++----
1 file changed, 141 insertions(+), 12 deletions(-)
---
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c
index 87c4c5ea47c9..ecd99e6669bd 100644
--- a/drivers/media/i2c/ov2680.c
+++ b/drivers/media/i2c/ov2680.c
@@ -65,8 +65,14 @@
#define OV2680_NATIVE_WIDTH 1616
#define OV2680_NATIVE_HEIGHT 1216
+#define OV2680_NATIVE_START_LEFT 0
+#define OV2680_NATIVE_START_TOP 0
#define OV2680_ACTIVE_WIDTH 1600
#define OV2680_ACTIVE_HEIGHT 1200
+#define OV2680_ACTIVE_START_LEFT 8
+#define OV2680_ACTIVE_START_TOP 8
+#define OV2680_MIN_CROP_WIDTH 2
+#define OV2680_MIN_CROP_HEIGHT 2
/* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */
#define OV2680_PIXELS_PER_LINE 1704
@@ -114,6 +120,7 @@ struct ov2680_ctrls {
};
struct ov2680_mode {
+ struct v4l2_rect crop;
struct v4l2_mbus_framefmt fmt;
struct v4l2_fract frame_interval;
bool binning;
@@ -147,6 +154,13 @@ struct ov2680_dev {
struct ov2680_mode mode;
};
+static const struct v4l2_rect ov2680_default_crop = {
+ .left = OV2680_ACTIVE_START_LEFT,
+ .top = OV2680_ACTIVE_START_TOP,
+ .width = OV2680_ACTIVE_WIDTH,
+ .height = OV2680_ACTIVE_HEIGHT,
+};
+
static const char * const test_pattern_menu[] = {
"Disabled",
"Color Bars",
@@ -232,6 +246,18 @@ __ov2680_get_pad_format(struct ov2680_dev *sensor,
return &sensor->mode.fmt;
}
+static struct v4l2_rect *
+__ov2680_get_pad_crop(struct ov2680_dev *sensor,
+ struct v4l2_subdev_state *state,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_crop(&sensor->sd, state, pad);
+
+ return &sensor->mode.crop;
+}
+
static void ov2680_fill_format(struct ov2680_dev *sensor,
struct v4l2_mbus_framefmt *fmt,
unsigned int width, unsigned int height)
@@ -251,8 +277,8 @@ static void ov2680_calc_mode(struct ov2680_dev *sensor)
int orig_width = width;
int orig_height = height;
- if (width <= (OV2680_NATIVE_WIDTH / 2) &&
- height <= (OV2680_NATIVE_HEIGHT / 2)) {
+ if (width <= (sensor->mode.crop.width / 2) &&
+ height <= (sensor->mode.crop.height / 2)) {
sensor->mode.binning = true;
width *= 2;
height *= 2;
@@ -260,8 +286,10 @@ static void ov2680_calc_mode(struct ov2680_dev *sensor)
sensor->mode.binning = false;
}
- sensor->mode.h_start = ((OV2680_NATIVE_WIDTH - width) / 2) & ~1;
- sensor->mode.v_start = ((OV2680_NATIVE_HEIGHT - height) / 2) & ~1;
+ sensor->mode.h_start = (sensor->mode.crop.left +
+ (sensor->mode.crop.width - width) / 2) & ~1;
+ sensor->mode.v_start = (sensor->mode.crop.top +
+ (sensor->mode.crop.height - height) / 2) & ~1;
sensor->mode.h_end =
min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1,
OV2680_NATIVE_WIDTH - 1);
@@ -541,16 +569,21 @@ static int ov2680_set_fmt(struct v4l2_subdev *sd,
{
struct ov2680_dev *sensor = to_ov2680_dev(sd);
struct v4l2_mbus_framefmt *try_fmt;
+ const struct v4l2_rect *crop;
unsigned int width, height;
int ret = 0;
if (format->pad != 0)
return -EINVAL;
- width = min_t(unsigned int, ALIGN(format->format.width, 2),
- OV2680_NATIVE_WIDTH);
- height = min_t(unsigned int, ALIGN(format->format.height, 2),
- OV2680_NATIVE_HEIGHT);
+ crop = __ov2680_get_pad_crop(sensor, sd_state, format->pad,
+ format->which);
+
+ /* Limit set_fmt max size to crop width / height */
+ width = clamp_val(ALIGN(format->format.width, 2),
+ OV2680_MIN_CROP_WIDTH, crop->width);
+ height = clamp_val(ALIGN(format->format.height, 2),
+ OV2680_MIN_CROP_HEIGHT, crop->height);
ov2680_fill_format(sensor, &format->format, width, height);
@@ -576,11 +609,97 @@ unlock:
return ret;
}
+static int ov2680_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ mutex_lock(&sensor->lock);
+ sel->r = *__ov2680_get_pad_crop(sensor, state, sel->pad,
+ sel->which);
+ mutex_unlock(&sensor->lock);
+ break;
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ sel->r.top = 0;
+ sel->r.left = 0;
+ sel->r.width = OV2680_NATIVE_WIDTH;
+ sel->r.height = OV2680_NATIVE_HEIGHT;
+ break;
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ sel->r = ov2680_default_crop;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ov2680_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+ struct v4l2_rect rect;
+
+ if (sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ /*
+ * Clamp the boundaries of the crop rectangle to the size of the sensor
+ * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
+ * disrupted.
+ */
+ rect.left = clamp_val(ALIGN(sel->r.left, 2),
+ OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH);
+ rect.top = clamp_val(ALIGN(sel->r.top, 2),
+ OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT);
+ rect.width = clamp_val(ALIGN(sel->r.width, 2),
+ OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH);
+ rect.height = clamp_val(ALIGN(sel->r.height, 2),
+ OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT);
+
+ /* Make sure the crop rectangle isn't outside the bounds of the array */
+ rect.width = min_t(unsigned int, rect.width,
+ OV2680_NATIVE_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ OV2680_NATIVE_HEIGHT - rect.top);
+
+ crop = __ov2680_get_pad_crop(sensor, state, sel->pad, sel->which);
+
+ mutex_lock(&sensor->lock);
+ if (rect.width != crop->width || rect.height != crop->height) {
+ /*
+ * Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ format = __ov2680_get_pad_format(sensor, state, sel->pad,
+ sel->which);
+ format->width = rect.width;
+ format->height = rect.height;
+ }
+
+ *crop = rect;
+ mutex_unlock(&sensor->lock);
+
+ sel->r = rect;
+
+ return 0;
+}
+
static int ov2680_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state)
{
struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ sd_state->pads[0].try_crop = ov2680_default_crop;
+
ov2680_fill_format(sensor, &sd_state->pads[0].try_fmt,
OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
return 0;
@@ -590,11 +709,18 @@ static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ struct v4l2_rect *crop;
+
if (fse->index >= OV2680_FRAME_SIZES)
return -EINVAL;
- fse->min_width = OV2680_ACTIVE_WIDTH / (fse->index + 1);
- fse->min_height = OV2680_ACTIVE_HEIGHT / (fse->index + 1);
+ crop = __ov2680_get_pad_crop(sensor, sd_state, fse->pad, fse->which);
+ if (!crop)
+ return -EINVAL;
+
+ fse->min_width = crop->width / (fse->index + 1);
+ fse->min_height = crop->height / (fse->index + 1);
fse->max_width = fse->min_width;
fse->max_height = fse->min_height;
@@ -690,10 +816,12 @@ static const struct v4l2_subdev_video_ops
ov2680_video_ops = {
static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
.init_cfg = ov2680_init_cfg,
.enum_mbus_code = ov2680_enum_mbus_code,
- .get_fmt = ov2680_get_fmt,
- .set_fmt = ov2680_set_fmt,
.enum_frame_size = ov2680_enum_frame_size,
.enum_frame_interval = ov2680_enum_frame_interval,
+ .get_fmt = ov2680_get_fmt,
+ .set_fmt = ov2680_set_fmt,
+ .get_selection = ov2680_get_selection,
+ .set_selection = ov2680_set_selection,
};
static const struct v4l2_subdev_ops ov2680_subdev_ops = {
@@ -704,6 +832,7 @@ static const struct v4l2_subdev_ops ov2680_subdev_ops = {
static int ov2680_mode_init(struct ov2680_dev *sensor)
{
/* set initial mode */
+ sensor->mode.crop = ov2680_default_crop;
ov2680_fill_format(sensor, &sensor->mode.fmt,
OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
ov2680_calc_mode(sensor);
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