271 lines
6.5 KiB
C
271 lines
6.5 KiB
C
/*
|
|
* Samsung TV Mixer driver
|
|
*
|
|
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
|
|
*
|
|
* Tomasz Stanislawski, <t.stanislaws@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published
|
|
* by the Free Software Foundiation. either version 2 of the License,
|
|
* or (at your option) any later version
|
|
*/
|
|
|
|
#include "mixer.h"
|
|
|
|
#include <media/videobuf2-dma-contig.h>
|
|
|
|
/* FORMAT DEFINITIONS */
|
|
|
|
static const struct mxr_format mxr_fb_fmt_rgb565 = {
|
|
.name = "RGB565",
|
|
.fourcc = V4L2_PIX_FMT_RGB565,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.num_planes = 1,
|
|
.plane = {
|
|
{ .width = 1, .height = 1, .size = 2 },
|
|
},
|
|
.num_subframes = 1,
|
|
.cookie = 4,
|
|
};
|
|
|
|
static const struct mxr_format mxr_fb_fmt_argb1555 = {
|
|
.name = "ARGB1555",
|
|
.num_planes = 1,
|
|
.fourcc = V4L2_PIX_FMT_RGB555,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.plane = {
|
|
{ .width = 1, .height = 1, .size = 2 },
|
|
},
|
|
.num_subframes = 1,
|
|
.cookie = 5,
|
|
};
|
|
|
|
static const struct mxr_format mxr_fb_fmt_argb4444 = {
|
|
.name = "ARGB4444",
|
|
.num_planes = 1,
|
|
.fourcc = V4L2_PIX_FMT_RGB444,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.plane = {
|
|
{ .width = 1, .height = 1, .size = 2 },
|
|
},
|
|
.num_subframes = 1,
|
|
.cookie = 6,
|
|
};
|
|
|
|
static const struct mxr_format mxr_fb_fmt_argb8888 = {
|
|
.name = "ARGB8888",
|
|
.fourcc = V4L2_PIX_FMT_BGR32,
|
|
.colorspace = V4L2_COLORSPACE_SRGB,
|
|
.num_planes = 1,
|
|
.plane = {
|
|
{ .width = 1, .height = 1, .size = 4 },
|
|
},
|
|
.num_subframes = 1,
|
|
.cookie = 7,
|
|
};
|
|
|
|
static const struct mxr_format *mxr_graph_format[] = {
|
|
&mxr_fb_fmt_rgb565,
|
|
&mxr_fb_fmt_argb1555,
|
|
&mxr_fb_fmt_argb4444,
|
|
&mxr_fb_fmt_argb8888,
|
|
};
|
|
|
|
/* AUXILIARY CALLBACKS */
|
|
|
|
static void mxr_graph_layer_release(struct mxr_layer *layer)
|
|
{
|
|
mxr_base_layer_unregister(layer);
|
|
mxr_base_layer_release(layer);
|
|
}
|
|
|
|
static void mxr_graph_buffer_set(struct mxr_layer *layer,
|
|
struct mxr_buffer *buf)
|
|
{
|
|
dma_addr_t addr = 0;
|
|
|
|
if (buf)
|
|
addr = vb2_dma_contig_plane_dma_addr(&buf->vb, 0);
|
|
mxr_reg_graph_buffer(layer->mdev, layer->idx, addr);
|
|
}
|
|
|
|
static void mxr_graph_stream_set(struct mxr_layer *layer, int en)
|
|
{
|
|
mxr_reg_graph_layer_stream(layer->mdev, layer->idx, en);
|
|
}
|
|
|
|
static void mxr_graph_format_set(struct mxr_layer *layer)
|
|
{
|
|
mxr_reg_graph_format(layer->mdev, layer->idx,
|
|
layer->fmt, &layer->geo);
|
|
}
|
|
|
|
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;
|
|
|
|
switch (stage) {
|
|
|
|
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 */
|
|
|
|
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 */
|
|
|
|
struct mxr_layer *mxr_graph_layer_create(struct mxr_device *mdev, int idx)
|
|
{
|
|
struct mxr_layer *layer;
|
|
int ret;
|
|
struct mxr_layer_ops ops = {
|
|
.release = mxr_graph_layer_release,
|
|
.buffer_set = mxr_graph_buffer_set,
|
|
.stream_set = mxr_graph_stream_set,
|
|
.format_set = mxr_graph_format_set,
|
|
.fix_geometry = mxr_graph_fix_geometry,
|
|
};
|
|
char name[32];
|
|
|
|
sprintf(name, "graph%d", idx);
|
|
|
|
layer = mxr_base_layer_create(mdev, idx, name, &ops);
|
|
if (layer == NULL) {
|
|
mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
|
|
goto fail;
|
|
}
|
|
|
|
layer->fmt_array = mxr_graph_format;
|
|
layer->fmt_array_size = ARRAY_SIZE(mxr_graph_format);
|
|
|
|
ret = mxr_base_layer_register(layer);
|
|
if (ret)
|
|
goto fail_layer;
|
|
|
|
return layer;
|
|
|
|
fail_layer:
|
|
mxr_base_layer_release(layer);
|
|
|
|
fail:
|
|
return NULL;
|
|
}
|
|
|