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Subject[PATCH v3 17/23] camss: vfe: Add interface for scaling
Date
Add compose selection ioctls to handle scaling configuration.

Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
---
drivers/media/platform/qcom/camss-8x16/camss-vfe.c | 189 ++++++++++++++++++++-
drivers/media/platform/qcom/camss-8x16/camss-vfe.h | 1 +
2 files changed, 188 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/camss-8x16/camss-vfe.c b/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
index 327f158..8ec6ce7 100644
--- a/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss-8x16/camss-vfe.c
@@ -211,6 +211,8 @@
#define CAMIF_TIMEOUT_SLEEP_US 1000
#define CAMIF_TIMEOUT_ALL_US 1000000

+#define SCALER_RATIO_MAX 16
+
static const u32 vfe_formats[] = {
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_VYUY8_2X8,
@@ -1905,6 +1907,25 @@ __vfe_get_format(struct vfe_line *line,
return &line->fmt[pad];
}

+/*
+ * __vfe_get_compose - Get pointer to compose selection structure
+ * @line: VFE line
+ * @cfg: V4L2 subdev pad configuration
+ * @which: TRY or ACTIVE format
+ *
+ * Return pointer to TRY or ACTIVE compose rectangle structure
+ */
+static struct v4l2_rect *
+__vfe_get_compose(struct vfe_line *line,
+ struct v4l2_subdev_pad_config *cfg,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_compose(&line->subdev, cfg,
+ MSM_VFE_PAD_SINK);
+
+ return &line->compose;
+}

/*
* vfe_try_format - Handle try format by pad subdev method
@@ -1951,7 +1972,14 @@ static void vfe_try_format(struct vfe_line *line,
*fmt = *__vfe_get_format(line, cfg, MSM_VFE_PAD_SINK,
which);

- if (line->id == VFE_LINE_PIX)
+ if (line->id == VFE_LINE_PIX) {
+ struct v4l2_rect *rect;
+
+ rect = __vfe_get_compose(line, cfg, which);
+
+ fmt->width = rect->width;
+ fmt->height = rect->height;
+
switch (fmt->code) {
case MEDIA_BUS_FMT_YUYV8_2X8:
if (code == MEDIA_BUS_FMT_YUYV8_1_5X8)
@@ -1979,6 +2007,7 @@ static void vfe_try_format(struct vfe_line *line,
fmt->code = MEDIA_BUS_FMT_VYUY8_2X8;
break;
}
+ }

break;
}
@@ -1987,6 +2016,50 @@ static void vfe_try_format(struct vfe_line *line,
}

/*
+ * vfe_try_compose - Handle try compose selection by pad subdev method
+ * @line: VFE line
+ * @cfg: V4L2 subdev pad configuration
+ * @rect: pointer to v4l2 rect structure
+ * @which: wanted subdev format
+ */
+static void vfe_try_compose(struct vfe_line *line,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_rect *rect,
+ enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_mbus_framefmt *fmt;
+
+ rect->width = rect->width - rect->left;
+ rect->left = 0;
+ rect->height = rect->height - rect->top;
+ rect->top = 0;
+
+ fmt = __vfe_get_format(line, cfg, MSM_VFE_PAD_SINK, which);
+
+ if (rect->width > fmt->width)
+ rect->width = fmt->width;
+
+ if (rect->height > fmt->height)
+ rect->height = fmt->height;
+
+ if (fmt->width > rect->width * SCALER_RATIO_MAX)
+ rect->width = (fmt->width + SCALER_RATIO_MAX - 1) /
+ SCALER_RATIO_MAX;
+
+ rect->width &= ~0x1;
+
+ if (fmt->height > rect->height * SCALER_RATIO_MAX)
+ rect->height = (fmt->height + SCALER_RATIO_MAX - 1) /
+ SCALER_RATIO_MAX;
+
+ if (rect->width < 16)
+ rect->width = 16;
+
+ if (rect->height < 4)
+ rect->height = 4;
+}
+
+/*
* vfe_enum_mbus_code - Handle pixel format enumeration
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
@@ -2081,6 +2154,10 @@ static int vfe_get_format(struct v4l2_subdev *sd,
return 0;
}

+static int vfe_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel);
+
/*
* vfe_set_format - Handle set format by pads subdev method
* @sd: VFE V4L2 subdevice
@@ -2103,20 +2180,126 @@ static int vfe_set_format(struct v4l2_subdev *sd,
vfe_try_format(line, cfg, fmt->pad, &fmt->format, fmt->which);
*format = fmt->format;

- /* Propagate the format from sink to source */
if (fmt->pad == MSM_VFE_PAD_SINK) {
+ struct v4l2_subdev_selection sel = { 0 };
+ int ret;
+
+ /* Propagate the format from sink to source */
format = __vfe_get_format(line, cfg, MSM_VFE_PAD_SRC,
fmt->which);

*format = fmt->format;
vfe_try_format(line, cfg, MSM_VFE_PAD_SRC, format,
fmt->which);
+
+ if (line->id != VFE_LINE_PIX)
+ return 0;
+
+ /* Reset sink pad compose selection */
+ sel.which = fmt->which;
+ sel.pad = MSM_VFE_PAD_SINK;
+ sel.target = V4L2_SEL_TGT_COMPOSE;
+ sel.r.width = fmt->format.width;
+ sel.r.height = fmt->format.height;
+ ret = vfe_set_selection(sd, cfg, &sel);
+ if (ret < 0)
+ return ret;
}

return 0;
}

/*
+ * vfe_get_selection - Handle get selection by pads subdev method
+ * @sd: VFE V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @sel: pointer to v4l2 subdev selection structure
+ *
+ * Return -EINVAL or zero on success
+ */
+static int vfe_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vfe_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_subdev_format fmt = { 0 };
+ struct v4l2_rect *compose;
+ int ret;
+
+ if (line->id != VFE_LINE_PIX || sel->pad != MSM_VFE_PAD_SINK)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ fmt.pad = sel->pad;
+ fmt.which = sel->which;
+ ret = vfe_get_format(sd, cfg, &fmt);
+ if (ret < 0)
+ return ret;
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = fmt.format.width;
+ sel->r.height = fmt.format.height;
+ break;
+ case V4L2_SEL_TGT_COMPOSE:
+ compose = __vfe_get_compose(line, cfg, sel->which);
+ if (compose == NULL)
+ return -EINVAL;
+
+ sel->r = *compose;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * vfe_set_selection - Handle set selection by pads subdev method
+ * @sd: VFE V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @sel: pointer to v4l2 subdev selection structure
+ *
+ * Return -EINVAL or zero on success
+ */
+int vfe_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct vfe_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_rect *compose;
+ struct v4l2_subdev_format fmt = { 0 };
+ int ret;
+
+ if (line->id != VFE_LINE_PIX || sel->pad != MSM_VFE_PAD_SINK)
+ return -EINVAL;
+
+ if (sel->target != V4L2_SEL_TGT_COMPOSE)
+ return -EINVAL;
+
+ compose = __vfe_get_compose(line, cfg, sel->which);
+ if (compose == NULL)
+ return -EINVAL;
+
+ vfe_try_compose(line, cfg, &sel->r, sel->which);
+ *compose = sel->r;
+
+ /* Reset source pad format width and height */
+ fmt.which = sel->which;
+ fmt.pad = MSM_VFE_PAD_SRC;
+ ret = vfe_get_format(sd, cfg, &fmt);
+ if (ret < 0)
+ return ret;
+
+ fmt.format.width = compose->width;
+ fmt.format.height = compose->height;
+ ret = vfe_set_format(sd, cfg, &fmt);
+
+ return ret;
+}
+
+/*
* vfe_init_formats - Initialize formats on all pads
* @sd: VFE V4L2 subdevice
* @fh: V4L2 subdev file handle
@@ -2310,6 +2493,8 @@ static const struct v4l2_subdev_pad_ops vfe_pad_ops = {
.enum_frame_size = vfe_enum_frame_size,
.get_fmt = vfe_get_format,
.set_fmt = vfe_set_format,
+ .get_selection = vfe_get_selection,
+ .set_selection = vfe_set_selection,
};

static const struct v4l2_subdev_ops vfe_v4l2_ops = {
diff --git a/drivers/media/platform/qcom/camss-8x16/camss-vfe.h b/drivers/media/platform/qcom/camss-8x16/camss-vfe.h
index b0598e4..6518c7a 100644
--- a/drivers/media/platform/qcom/camss-8x16/camss-vfe.h
+++ b/drivers/media/platform/qcom/camss-8x16/camss-vfe.h
@@ -80,6 +80,7 @@ struct vfe_line {
struct v4l2_subdev subdev;
struct media_pad pads[MSM_VFE_PADS_NUM];
struct v4l2_mbus_framefmt fmt[MSM_VFE_PADS_NUM];
+ struct v4l2_rect compose;
struct camss_video video_out;
struct vfe_output output;
};
--
2.7.4
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