[media] v4l: s5p-tv: mixer: add support for selection API

This patch add support for V4L2 selection API to s5p-tv driver.  Moreover it
removes old API for cropping.  Old applications would still work because the
crop ioctls are emulated using the selection API.

Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 425 insertions, 196 deletions

diff --git a/drivers/media/video/s5p-tv/mixer.h b/drivers/media/video/s5p-tv/mixer.h
index 51ad59b3035..1597078c4a5 100644
--- a/drivers/media/video/s5p-tv/mixer.h
+++ b/drivers/media/video/s5p-tv/mixer.h
@@ -86,6 +86,17 @@ struct mxr_crop {
         unsigned int field;
 };
 
+/** stages of geometry operations */
+enum mxr_geometry_stage {
+        MXR_GEOMETRY_SINK,
+        MXR_GEOMETRY_COMPOSE,
+        MXR_GEOMETRY_CROP,
+        MXR_GEOMETRY_SOURCE,
+};
+
+/* flag indicating that offset should be 0 */
+#define MXR_NO_OFFSET   0x80000000
+
 /** description of transformation from source to destination image */
 struct mxr_geometry {
         /** cropping for source image */
@@ -133,7 +144,8 @@ struct mxr_layer_ops {
         /** streaming stop/start */
         void (*stream_set)(struct mxr_layer *, int);
         /** adjusting geometry */
-        void (*fix_geometry)(struct mxr_layer *);
+        void (*fix_geometry)(struct mxr_layer *,
+                enum mxr_geometry_stage, unsigned long);
 };
 
 /** layer instance, a single window and content displayed on output */
diff --git a/drivers/media/video/s5p-tv/mixer_grp_layer.c b/drivers/media/video/s5p-tv/mixer_grp_layer.c
index de8270c2b6e..b93a21f5aa1 100644
--- a/drivers/media/video/s5p-tv/mixer_grp_layer.c
+++ b/drivers/media/video/s5p-tv/mixer_grp_layer.c
@@ -101,47 +101,132 @@ static void mxr_graph_format_set(struct mxr_layer *layer)
                 layer->fmt, &layer->geo);
 }
 
-static void mxr_graph_fix_geometry(struct mxr_layer *layer)
+static inline unsigned int closest(unsigned int x, unsigned int a,
+        unsigned int b, unsigned long flags)
+{
+        unsigned int mid = (a + b) / 2;
+
+        /* choosing closest value with constraints according to table:
+         * -------------+-----+-----+-----+-------+
+         * flags        |  0  |  LE |  GE | LE|GE |
+         * -------------+-----+-----+-----+-------+
+         * x <= a       |  a  |  a  |  a  |   a   |
+         * a < x <= mid |  a  |  a  |  b  |   a   |
+         * mid < x < b  |  b  |  a  |  b  |   b   |
+         * b <= x       |  b  |  b  |  b  |   b   |
+         * -------------+-----+-----+-----+-------+
+         */
+
+        /* remove all non-constraint flags */
+        flags &= V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE;
+
+        if (x <= a)
+                return  a;
+        if (x >= b)
+                return b;
+        if (flags == V4L2_SEL_FLAG_LE)
+                return a;
+        if (flags == V4L2_SEL_FLAG_GE)
+                return b;
+        if (x <= mid)
+                return a;
+        return b;
+}
+
+static inline unsigned int do_center(unsigned int center,
+        unsigned int size, unsigned int upper, unsigned int flags)
+{
+        unsigned int lower;
+
+        if (flags & MXR_NO_OFFSET)
+                return 0;
+
+        lower = center - min(center, size / 2);
+        return min(lower, upper - size);
+}
+
+static void mxr_graph_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 int x_center, y_center;
 
-        /* limit to boundary size */
-        geo->src.full_width = clamp_val(geo->src.full_width, 1, 32767);
-        geo->src.full_height = clamp_val(geo->src.full_height, 1, 2047);
-        geo->src.width = clamp_val(geo->src.width, 1, geo->src.full_width);
-        geo->src.width = min(geo->src.width, 2047U);
-        /* not possible to crop of Y axis */
-        geo->src.y_offset = min(geo->src.y_offset, geo->src.full_height - 1);
-        geo->src.height = geo->src.full_height - geo->src.y_offset;
-        /* limitting offset */
-        geo->src.x_offset = min(geo->src.x_offset,
-                geo->src.full_width - geo->src.width);
-
-        /* setting position in output */
-        geo->dst.width = min(geo->dst.width, geo->dst.full_width);
-        geo->dst.height = min(geo->dst.height, geo->dst.full_height);
-
-        /* Mixer supports only 1x and 2x scaling */
-        if (geo->dst.width >= 2 * geo->src.width) {
-                geo->x_ratio = 1;
-                geo->dst.width = 2 * geo->src.width;
-        } else {
-                geo->x_ratio = 0;
-                geo->dst.width = geo->src.width;
-        }
+        switch (stage) {
 
-        if (geo->dst.height >= 2 * geo->src.height) {
-                geo->y_ratio = 1;
-                geo->dst.height = 2 * geo->src.height;
-        } else {
-                geo->y_ratio = 0;
-                geo->dst.height = geo->src.height;
-        }
+        case MXR_GEOMETRY_SINK: /* nothing to be fixed here */
+                flags = 0;
+                /* fall through */
+
+        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;
+                /* round up/down to 2 multiple depending on flags */
+                if (flags & V4L2_SEL_FLAG_LE) {
+                        dst->width = round_down(dst->width, 2);
+                        dst->height = round_down(dst->height, 2);
+                } else {
+                        dst->width = round_up(dst->width, 2);
+                        dst->height = round_up(dst->height, 2);
+                }
+                /* assure that compose rect is inside display area */
+                dst->width = min(dst->width, dst->full_width);
+                dst->height = min(dst->height, dst->full_height);
+
+                /* ensure that compose is reachable using 2x scaling */
+                dst->width = min(dst->width, 2 * src->full_width);
+                dst->height = min(dst->height, 2 * 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;
+                /* fall through */
 
-        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);
+        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 that cropping area lies inside the buffer */
+                if (src->full_width < dst->width)
+                        src->width = dst->width / 2;
+                else
+                        src->width = closest(src->width, dst->width / 2,
+                                dst->width, flags);
+
+                if (src->width == dst->width)
+                        geo->x_ratio = 0;
+                else
+                        geo->x_ratio = 1;
+
+                if (src->full_height < dst->height)
+                        src->height = dst->height / 2;
+                else
+                        src->height = closest(src->height, dst->height / 2,
+                                dst->height, flags);
+
+                if (src->height == dst->height)
+                        geo->y_ratio = 0;
+                else
+                        geo->y_ratio = 1;
+
+                /* 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);
+                flags = 0;
+                /* fall through */
+        case MXR_GEOMETRY_SOURCE:
+                src->full_width = clamp_val(src->full_width,
+                        src->width + src->x_offset, 32767);
+                src->full_height = clamp_val(src->full_height,
+                        src->height + src->y_offset, 2047);
+        };
 }
 
 /* PUBLIC API */
diff --git a/drivers/media/video/s5p-tv/mixer_video.c b/drivers/media/video/s5p-tv/mixer_video.c
index b47d0c06ecf..7884baeff76 100644
--- a/drivers/media/video/s5p-tv/mixer_video.c
+++ b/drivers/media/video/s5p-tv/mixer_video.c
@@ -170,18 +170,22 @@ static int mxr_querycap(struct file *file, void *priv,
         return 0;
 }
 
-/* Geometry handling */
-static void mxr_layer_geo_fix(struct mxr_layer *layer)
+static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
 {
-        struct mxr_device *mdev = layer->mdev;
-        struct v4l2_mbus_framefmt mbus_fmt;
-
-        /* TODO: add some dirty flag to avoid unnecessary adjustments */
-        mxr_get_mbus_fmt(mdev, &mbus_fmt);
-        layer->geo.dst.full_width = mbus_fmt.width;
-        layer->geo.dst.full_height = mbus_fmt.height;
-        layer->geo.dst.field = mbus_fmt.field;
-        layer->ops.fix_geometry(layer);
+        mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
+                geo->src.full_width, geo->src.full_height);
+        mxr_dbg(mdev, "src.size = (%u, %u)\n",
+                geo->src.width, geo->src.height);
+        mxr_dbg(mdev, "src.offset = (%u, %u)\n",
+                geo->src.x_offset, geo->src.y_offset);
+        mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
+                geo->dst.full_width, geo->dst.full_height);
+        mxr_dbg(mdev, "dst.size = (%u, %u)\n",
+                geo->dst.width, geo->dst.height);
+        mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
+                geo->dst.x_offset, geo->dst.y_offset);
+        mxr_dbg(mdev, "ratio = (%u, %u)\n",
+                geo->x_ratio, geo->y_ratio);
 }
 
 static void mxr_layer_default_geo(struct mxr_layer *layer)
@@ -204,27 +208,29 @@ static void mxr_layer_default_geo(struct mxr_layer *layer)
         layer->geo.src.width = layer->geo.src.full_width;
         layer->geo.src.height = layer->geo.src.full_height;
 
-        layer->ops.fix_geometry(layer);
+        mxr_geometry_dump(mdev, &layer->geo);
+        layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
+        mxr_geometry_dump(mdev, &layer->geo);
 }
 
-static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
+static void mxr_layer_update_output(struct mxr_layer *layer)
 {
-        mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
-                geo->src.full_width, geo->src.full_height);
-        mxr_dbg(mdev, "src.size = (%u, %u)\n",
-                geo->src.width, geo->src.height);
-        mxr_dbg(mdev, "src.offset = (%u, %u)\n",
-                geo->src.x_offset, geo->src.y_offset);
-        mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
-                geo->dst.full_width, geo->dst.full_height);
-        mxr_dbg(mdev, "dst.size = (%u, %u)\n",
-                geo->dst.width, geo->dst.height);
-        mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
-                geo->dst.x_offset, geo->dst.y_offset);
-        mxr_dbg(mdev, "ratio = (%u, %u)\n",
-                geo->x_ratio, geo->y_ratio);
-}
+        struct mxr_device *mdev = layer->mdev;
+        struct v4l2_mbus_framefmt mbus_fmt;
+
+        mxr_get_mbus_fmt(mdev, &mbus_fmt);
+        /* checking if update is needed */
+        if (layer->geo.dst.full_width == mbus_fmt.width &&
+                layer->geo.dst.full_height == mbus_fmt.width)
+                return;
 
+        layer->geo.dst.full_width = mbus_fmt.width;
+        layer->geo.dst.full_height = mbus_fmt.height;
+        layer->geo.dst.field = mbus_fmt.field;
+        layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
+
+        mxr_geometry_dump(mdev, &layer->geo);
+}
 
 static const struct mxr_format *find_format_by_fourcc(
         struct mxr_layer *layer, unsigned long fourcc);
@@ -249,37 +255,6 @@ static int mxr_enum_fmt(struct file *file, void  *priv,
         return 0;
 }
 
-static int mxr_s_fmt(struct file *file, void *priv,
-        struct v4l2_format *f)
-{
-        struct mxr_layer *layer = video_drvdata(file);
-        const struct mxr_format *fmt;
-        struct v4l2_pix_format_mplane *pix;
-        struct mxr_device *mdev = layer->mdev;
-        struct mxr_geometry *geo = &layer->geo;
-
-        mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
-
-        pix = &f->fmt.pix_mp;
-        fmt = find_format_by_fourcc(layer, pix->pixelformat);
-        if (fmt == NULL) {
-                mxr_warn(mdev, "not recognized fourcc: %08x\n",
-                        pix->pixelformat);
-                return -EINVAL;
-        }
-        layer->fmt = fmt;
-        geo->src.full_width = pix->width;
-        geo->src.width = pix->width;
-        geo->src.full_height = pix->height;
-        geo->src.height = pix->height;
-        /* assure consistency of geometry */
-        mxr_layer_geo_fix(layer);
-        mxr_dbg(mdev, "width=%u height=%u span=%u\n",
-                geo->src.width, geo->src.height, geo->src.full_width);
-
-        return 0;
-}
-
 static unsigned int divup(unsigned int divident, unsigned int divisor)
 {
         return (divident + divisor - 1) / divisor;
@@ -299,6 +274,10 @@ static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
 {
         int i;
 
+        /* checking if nothing to fill */
+        if (!planes)
+                return;
+
         memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
         for (i = 0; i < fmt->num_planes; ++i) {
                 struct v4l2_plane_pix_format *plane = planes
@@ -332,73 +311,194 @@ static int mxr_g_fmt(struct file *file, void *priv,
         return 0;
 }
 
-static inline struct mxr_crop *choose_crop_by_type(struct mxr_geometry *geo,
-        enum v4l2_buf_type type)
-{
-        switch (type) {
-        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-                return &geo->dst;
-        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
-                return &geo->src;
-        default:
-                return NULL;
-        }
-}
-
-static int mxr_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
+static int mxr_s_fmt(struct file *file, void *priv,
+        struct v4l2_format *f)
 {
         struct mxr_layer *layer = video_drvdata(file);
-        struct mxr_crop *crop;
+        const struct mxr_format *fmt;
+        struct v4l2_pix_format_mplane *pix;
+        struct mxr_device *mdev = layer->mdev;
+        struct mxr_geometry *geo = &layer->geo;
 
-        mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
-        crop = choose_crop_by_type(&layer->geo, a->type);
-        if (crop == NULL)
+        mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
+
+        pix = &f->fmt.pix_mp;
+        fmt = find_format_by_fourcc(layer, pix->pixelformat);
+        if (fmt == NULL) {
+                mxr_warn(mdev, "not recognized fourcc: %08x\n",
+                        pix->pixelformat);
                 return -EINVAL;
-        mxr_layer_geo_fix(layer);
-        a->c.left = crop->x_offset;
-        a->c.top = crop->y_offset;
-        a->c.width = crop->width;
-        a->c.height = crop->height;
+        }
+        layer->fmt = fmt;
+        /* set source size to highest accepted value */
+        geo->src.full_width = max(geo->dst.full_width, pix->width);
+        geo->src.full_height = max(geo->dst.full_height, pix->height);
+        layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
+        mxr_geometry_dump(mdev, &layer->geo);
+        /* set cropping to total visible screen */
+        geo->src.width = pix->width;
+        geo->src.height = pix->height;
+        geo->src.x_offset = 0;
+        geo->src.y_offset = 0;
+        /* assure consistency of geometry */
+        layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
+        mxr_geometry_dump(mdev, &layer->geo);
+        /* set full size to lowest possible value */
+        geo->src.full_width = 0;
+        geo->src.full_height = 0;
+        layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
+        mxr_geometry_dump(mdev, &layer->geo);
+
+        /* returning results */
+        mxr_g_fmt(file, priv, f);
+
         return 0;
 }
 
-static int mxr_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
+static int mxr_g_selection(struct file *file, void *fh,
+        struct v4l2_selection *s)
 {
         struct mxr_layer *layer = video_drvdata(file);
-        struct mxr_crop *crop;
+        struct mxr_geometry *geo = &layer->geo;
 
         mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
-        crop = choose_crop_by_type(&layer->geo, a->type);
-        if (crop == NULL)
+
+        if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+                s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+                return -EINVAL;
+
+        switch (s->target) {
+        case V4L2_SEL_TGT_CROP_ACTIVE:
+                s->r.left = geo->src.x_offset;
+                s->r.top = geo->src.y_offset;
+                s->r.width = geo->src.width;
+                s->r.height = geo->src.height;
+                break;
+        case V4L2_SEL_TGT_CROP_DEFAULT:
+        case V4L2_SEL_TGT_CROP_BOUNDS:
+                s->r.left = 0;
+                s->r.top = 0;
+                s->r.width = geo->src.full_width;
+                s->r.height = geo->src.full_height;
+                break;
+        case V4L2_SEL_TGT_COMPOSE_ACTIVE:
+        case V4L2_SEL_TGT_COMPOSE_PADDED:
+                s->r.left = geo->dst.x_offset;
+                s->r.top = geo->dst.y_offset;
+                s->r.width = geo->dst.width;
+                s->r.height = geo->dst.height;
+                break;
+        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+                s->r.left = 0;
+                s->r.top = 0;
+                s->r.width = geo->dst.full_width;
+                s->r.height = geo->dst.full_height;
+                break;
+        default:
                 return -EINVAL;
-        crop->x_offset = a->c.left;
-        crop->y_offset = a->c.top;
-        crop->width = a->c.width;
-        crop->height = a->c.height;
-        mxr_layer_geo_fix(layer);
+        }
+
         return 0;
 }
 
-static int mxr_cropcap(struct file *file, void *fh, struct v4l2_cropcap *a)
+/* returns 1 if rectangle 'a' is inside 'b' */
+static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
+{
+        if (a->left < b->left)
+                return 0;
+        if (a->top < b->top)
+                return 0;
+        if (a->left + a->width > b->left + b->width)
+                return 0;
+        if (a->top + a->height > b->top + b->height)
+                return 0;
+        return 1;
+}
+
+static int mxr_s_selection(struct file *file, void *fh,
+        struct v4l2_selection *s)
 {
         struct mxr_layer *layer = video_drvdata(file);
-        struct mxr_crop *crop;
+        struct mxr_geometry *geo = &layer->geo;
+        struct mxr_crop *target = NULL;
+        enum mxr_geometry_stage stage;
+        struct mxr_geometry tmp;
+        struct v4l2_rect res;
 
-        mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
-        crop = choose_crop_by_type(&layer->geo, a->type);
-        if (crop == NULL)
+        memset(&res, 0, sizeof res);
+
+        mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
+                s->r.width, s->r.height, s->r.left, s->r.top);
+
+        if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
+                s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
                 return -EINVAL;
-        mxr_layer_geo_fix(layer);
-        a->bounds.left = 0;
-        a->bounds.top = 0;
-        a->bounds.width = crop->full_width;
-        a->bounds.top = crop->full_height;
-        a->defrect = a->bounds;
-        /* setting pixel aspect to 1/1 */
-        a->pixelaspect.numerator = 1;
-        a->pixelaspect.denominator = 1;
+
+        switch (s->target) {
+        /* ignore read-only targets */
+        case V4L2_SEL_TGT_CROP_DEFAULT:
+        case V4L2_SEL_TGT_CROP_BOUNDS:
+                res.width = geo->src.full_width;
+                res.height = geo->src.full_height;
+                break;
+
+        /* ignore read-only targets */
+        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+                res.width = geo->dst.full_width;
+                res.height = geo->dst.full_height;
+                break;
+
+        case V4L2_SEL_TGT_CROP_ACTIVE:
+                target = &geo->src;
+                stage = MXR_GEOMETRY_CROP;
+                break;
+        case V4L2_SEL_TGT_COMPOSE_ACTIVE:
+        case V4L2_SEL_TGT_COMPOSE_PADDED:
+                target = &geo->dst;
+                stage = MXR_GEOMETRY_COMPOSE;
+                break;
+        default:
+                return -EINVAL;
+        }
+        /* apply change and update geometry if needed */
+        if (target) {
+                /* backup current geometry if setup fails */
+                memcpy(&tmp, geo, sizeof tmp);
+
+                /* apply requested selection */
+                target->x_offset = s->r.left;
+                target->y_offset = s->r.top;
+                target->width = s->r.width;
+                target->height = s->r.height;
+
+                layer->ops.fix_geometry(layer, stage, s->flags);
+
+                /* retrieve update selection rectangle */
+                res.left = target->x_offset;
+                res.top = target->y_offset;
+                res.width = target->width;
+                res.height = target->height;
+
+                mxr_geometry_dump(layer->mdev, &layer->geo);
+        }
+
+        /* checking if the rectangle satisfies constraints */
+        if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
+                goto fail;
+        if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
+                goto fail;
+
+        /* return result rectangle */
+        s->r = res;
+
         return 0;
+fail:
+        /* restore old geometry, which is not touched if target is NULL */
+        if (target)
+                memcpy(geo, &tmp, sizeof tmp);
+        return -ERANGE;
 }
 
 static int mxr_enum_dv_presets(struct file *file, void *fh,
@@ -438,6 +538,8 @@ static int mxr_s_dv_preset(struct file *file, void *fh,
 
         mutex_unlock(&mdev->mutex);
 
+        mxr_layer_update_output(layer);
+
         /* any failure should return EINVAL according to V4L2 doc */
         return ret ? -EINVAL : 0;
 }
@@ -478,6 +580,8 @@ static int mxr_s_std(struct file *file, void *fh, v4l2_std_id *norm)
 
         mutex_unlock(&mdev->mutex);
 
+        mxr_layer_update_output(layer);
+
         return ret ? -EINVAL : 0;
 }
 
@@ -526,25 +630,27 @@ static int mxr_s_output(struct file *file, void *fh, unsigned int i)
         struct video_device *vfd = video_devdata(file);
         struct mxr_layer *layer = video_drvdata(file);
         struct mxr_device *mdev = layer->mdev;
-        int ret = 0;
 
         if (i >= mdev->output_cnt || mdev->output[i] == NULL)
                 return -EINVAL;
 
         mutex_lock(&mdev->mutex);
         if (mdev->n_output > 0) {
-                ret = -EBUSY;
-                goto done;
+                mutex_unlock(&mdev->mutex);
+                return -EBUSY;
         }
         mdev->current_output = i;
         vfd->tvnorms = 0;
         v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
                 &vfd->tvnorms);
+        mutex_unlock(&mdev->mutex);
+
+        /* update layers geometry */
+        mxr_layer_update_output(layer);
+
         mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
 
-done:
-        mutex_unlock(&mdev->mutex);
-        return ret;
+        return 0;
 }
 
 static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
@@ -633,10 +739,9 @@ static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
         .vidioc_enum_output = mxr_enum_output,
         .vidioc_s_output = mxr_s_output,
         .vidioc_g_output = mxr_g_output,
-        /* Crop ioctls */
-        .vidioc_g_crop = mxr_g_crop,
-        .vidioc_s_crop = mxr_s_crop,
-        .vidioc_cropcap = mxr_cropcap,
+        /* selection ioctls */
+        .vidioc_g_selection = mxr_g_selection,
+        .vidioc_s_selection = mxr_s_selection,
 };
 
 static int mxr_video_open(struct file *file)
@@ -805,10 +910,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
         /* block any changes in output configuration */
         mxr_output_get(mdev);
 
-        /* update layers geometry */
-        mxr_layer_geo_fix(layer);
-        mxr_geometry_dump(mdev, &layer->geo);
-
+        mxr_layer_update_output(layer);
         layer->ops.format_set(layer);
         /* enabling layer in hardware */
         spin_lock_irqsave(&layer->enq_slock, flags);
diff --git a/drivers/media/video/s5p-tv/mixer_vp_layer.c b/drivers/media/video/s5p-tv/mixer_vp_layer.c
index f3bb2e34cb5..e41ec2ec45f 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, 4),
+                        dst->width * 16);
+                src->height = clamp(src->height, round_up(dst->height, 4),
+                        dst->height * 16);
+
+                /* 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 */