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path: root/drivers/media/video/s5p-tv/mixer_vp_layer.c
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Diffstat (limited to 'drivers/media/video/s5p-tv/mixer_vp_layer.c')
-rw-r--r--drivers/media/video/s5p-tv/mixer_vp_layer.c108
1 files changed, 69 insertions, 39 deletions
diff --git a/drivers/media/video/s5p-tv/mixer_vp_layer.c b/drivers/media/video/s5p-tv/mixer_vp_layer.c
index f3bb2e34cb5..3d13a636877 100644
--- a/drivers/media/video/s5p-tv/mixer_vp_layer.c
+++ b/drivers/media/video/s5p-tv/mixer_vp_layer.c
@@ -127,47 +127,77 @@ static void mxr_vp_format_set(struct mxr_layer *layer)
mxr_reg_vp_format(layer->mdev, layer->fmt, &layer->geo);
}
-static void mxr_vp_fix_geometry(struct mxr_layer *layer)
+static inline unsigned int do_center(unsigned int center,
+ unsigned int size, unsigned int upper, unsigned int flags)
{
- struct mxr_geometry *geo = &layer->geo;
+ unsigned int lower;
+
+ if (flags & MXR_NO_OFFSET)
+ return 0;
+
+ lower = center - min(center, size / 2);
+ return min(lower, upper - size);
+}
- /* align horizontal size to 8 pixels */
- geo->src.full_width = ALIGN(geo->src.full_width, 8);
- /* limit to boundary size */
- geo->src.full_width = clamp_val(geo->src.full_width, 8, 8192);
- geo->src.full_height = clamp_val(geo->src.full_height, 1, 8192);
- geo->src.width = clamp_val(geo->src.width, 32, geo->src.full_width);
- geo->src.width = min(geo->src.width, 2047U);
- geo->src.height = clamp_val(geo->src.height, 4, geo->src.full_height);
- geo->src.height = min(geo->src.height, 2047U);
-
- /* setting size of output window */
- geo->dst.width = clamp_val(geo->dst.width, 8, geo->dst.full_width);
- geo->dst.height = clamp_val(geo->dst.height, 1, geo->dst.full_height);
-
- /* ensure that scaling is in range 1/4x to 16x */
- if (geo->src.width >= 4 * geo->dst.width)
- geo->src.width = 4 * geo->dst.width;
- if (geo->dst.width >= 16 * geo->src.width)
- geo->dst.width = 16 * geo->src.width;
- if (geo->src.height >= 4 * geo->dst.height)
- geo->src.height = 4 * geo->dst.height;
- if (geo->dst.height >= 16 * geo->src.height)
- geo->dst.height = 16 * geo->src.height;
-
- /* setting scaling ratio */
- geo->x_ratio = (geo->src.width << 16) / geo->dst.width;
- geo->y_ratio = (geo->src.height << 16) / geo->dst.height;
-
- /* adjust offsets */
- geo->src.x_offset = min(geo->src.x_offset,
- geo->src.full_width - geo->src.width);
- geo->src.y_offset = min(geo->src.y_offset,
- geo->src.full_height - geo->src.height);
- geo->dst.x_offset = min(geo->dst.x_offset,
- geo->dst.full_width - geo->dst.width);
- geo->dst.y_offset = min(geo->dst.y_offset,
- geo->dst.full_height - geo->dst.height);
+static void mxr_vp_fix_geometry(struct mxr_layer *layer,
+ enum mxr_geometry_stage stage, unsigned long flags)
+{
+ struct mxr_geometry *geo = &layer->geo;
+ struct mxr_crop *src = &geo->src;
+ struct mxr_crop *dst = &geo->dst;
+ unsigned long x_center, y_center;
+
+ switch (stage) {
+
+ case MXR_GEOMETRY_SINK: /* nothing to be fixed here */
+ case MXR_GEOMETRY_COMPOSE:
+ /* remember center of the area */
+ x_center = dst->x_offset + dst->width / 2;
+ y_center = dst->y_offset + dst->height / 2;
+
+ /* ensure that compose is reachable using 16x scaling */
+ dst->width = clamp(dst->width, 8U, 16 * src->full_width);
+ dst->height = clamp(dst->height, 1U, 16 * src->full_height);
+
+ /* setup offsets */
+ dst->x_offset = do_center(x_center, dst->width,
+ dst->full_width, flags);
+ dst->y_offset = do_center(y_center, dst->height,
+ dst->full_height, flags);
+ flags = 0; /* remove possible MXR_NO_OFFSET flag */
+ /* fall through */
+ case MXR_GEOMETRY_CROP:
+ /* remember center of the area */
+ x_center = src->x_offset + src->width / 2;
+ y_center = src->y_offset + src->height / 2;
+
+ /* ensure scaling is between 0.25x .. 16x */
+ src->width = clamp(src->width, round_up(dst->width / 16, 4),
+ dst->width * 4);
+ src->height = clamp(src->height, round_up(dst->height / 16, 4),
+ dst->height * 4);
+
+ /* hardware limits */
+ src->width = clamp(src->width, 32U, 2047U);
+ src->height = clamp(src->height, 4U, 2047U);
+
+ /* setup offsets */
+ src->x_offset = do_center(x_center, src->width,
+ src->full_width, flags);
+ src->y_offset = do_center(y_center, src->height,
+ src->full_height, flags);
+
+ /* setting scaling ratio */
+ geo->x_ratio = (src->width << 16) / dst->width;
+ geo->y_ratio = (src->height << 16) / dst->height;
+ /* fall through */
+
+ case MXR_GEOMETRY_SOURCE:
+ src->full_width = clamp(src->full_width,
+ ALIGN(src->width + src->x_offset, 8), 8192U);
+ src->full_height = clamp(src->full_height,
+ src->height + src->y_offset, 8192U);
+ };
}
/* PUBLIC API */