271 lines
6.5 KiB
C
271 lines
6.5 KiB
C
/*
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* Samsung TV Mixer driver
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*
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* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
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*
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* Tomasz Stanislawski, <t.stanislaws@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundiation. either version 2 of the License,
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* or (at your option) any later version
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*/
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#include "mixer.h"
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#include <media/videobuf2-dma-contig.h>
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/* FORMAT DEFINITIONS */
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static const struct mxr_format mxr_fb_fmt_rgb565 = {
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.name = "RGB565",
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.fourcc = V4L2_PIX_FMT_RGB565,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.num_planes = 1,
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.plane = {
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{ .width = 1, .height = 1, .size = 2 },
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},
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.num_subframes = 1,
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.cookie = 4,
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};
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static const struct mxr_format mxr_fb_fmt_argb1555 = {
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.name = "ARGB1555",
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.num_planes = 1,
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.fourcc = V4L2_PIX_FMT_RGB555,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.plane = {
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{ .width = 1, .height = 1, .size = 2 },
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},
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.num_subframes = 1,
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.cookie = 5,
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};
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static const struct mxr_format mxr_fb_fmt_argb4444 = {
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.name = "ARGB4444",
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.num_planes = 1,
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.fourcc = V4L2_PIX_FMT_RGB444,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.plane = {
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{ .width = 1, .height = 1, .size = 2 },
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},
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.num_subframes = 1,
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.cookie = 6,
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};
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static const struct mxr_format mxr_fb_fmt_argb8888 = {
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.name = "ARGB8888",
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.fourcc = V4L2_PIX_FMT_BGR32,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.num_planes = 1,
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.plane = {
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{ .width = 1, .height = 1, .size = 4 },
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},
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.num_subframes = 1,
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.cookie = 7,
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};
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static const struct mxr_format *mxr_graph_format[] = {
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&mxr_fb_fmt_rgb565,
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&mxr_fb_fmt_argb1555,
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&mxr_fb_fmt_argb4444,
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&mxr_fb_fmt_argb8888,
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};
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/* AUXILIARY CALLBACKS */
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static void mxr_graph_layer_release(struct mxr_layer *layer)
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{
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mxr_base_layer_unregister(layer);
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mxr_base_layer_release(layer);
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}
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static void mxr_graph_buffer_set(struct mxr_layer *layer,
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struct mxr_buffer *buf)
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{
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dma_addr_t addr = 0;
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if (buf)
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addr = vb2_dma_contig_plane_dma_addr(&buf->vb, 0);
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mxr_reg_graph_buffer(layer->mdev, layer->idx, addr);
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}
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static void mxr_graph_stream_set(struct mxr_layer *layer, int en)
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{
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mxr_reg_graph_layer_stream(layer->mdev, layer->idx, en);
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}
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static void mxr_graph_format_set(struct mxr_layer *layer)
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{
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mxr_reg_graph_format(layer->mdev, layer->idx,
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layer->fmt, &layer->geo);
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}
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static inline unsigned int closest(unsigned int x, unsigned int a,
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unsigned int b, unsigned long flags)
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{
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unsigned int mid = (a + b) / 2;
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/* choosing closest value with constraints according to table:
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* -------------+-----+-----+-----+-------+
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* flags | 0 | LE | GE | LE|GE |
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* -------------+-----+-----+-----+-------+
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* x <= a | a | a | a | a |
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* a < x <= mid | a | a | b | a |
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* mid < x < b | b | a | b | b |
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* b <= x | b | b | b | b |
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* -------------+-----+-----+-----+-------+
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*/
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/* remove all non-constraint flags */
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flags &= V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE;
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if (x <= a)
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return a;
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if (x >= b)
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return b;
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if (flags == V4L2_SEL_FLAG_LE)
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return a;
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if (flags == V4L2_SEL_FLAG_GE)
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return b;
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if (x <= mid)
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return a;
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return b;
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}
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static inline unsigned int do_center(unsigned int center,
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unsigned int size, unsigned int upper, unsigned int flags)
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{
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unsigned int lower;
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if (flags & MXR_NO_OFFSET)
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return 0;
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lower = center - min(center, size / 2);
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return min(lower, upper - size);
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}
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static void mxr_graph_fix_geometry(struct mxr_layer *layer,
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enum mxr_geometry_stage stage, unsigned long flags)
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{
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struct mxr_geometry *geo = &layer->geo;
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struct mxr_crop *src = &geo->src;
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struct mxr_crop *dst = &geo->dst;
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unsigned int x_center, y_center;
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switch (stage) {
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case MXR_GEOMETRY_SINK: /* nothing to be fixed here */
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flags = 0;
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/* fall through */
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case MXR_GEOMETRY_COMPOSE:
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/* remember center of the area */
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x_center = dst->x_offset + dst->width / 2;
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y_center = dst->y_offset + dst->height / 2;
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/* round up/down to 2 multiple depending on flags */
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if (flags & V4L2_SEL_FLAG_LE) {
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dst->width = round_down(dst->width, 2);
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dst->height = round_down(dst->height, 2);
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} else {
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dst->width = round_up(dst->width, 2);
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dst->height = round_up(dst->height, 2);
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}
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/* assure that compose rect is inside display area */
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dst->width = min(dst->width, dst->full_width);
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dst->height = min(dst->height, dst->full_height);
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/* ensure that compose is reachable using 2x scaling */
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dst->width = min(dst->width, 2 * src->full_width);
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dst->height = min(dst->height, 2 * src->full_height);
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/* setup offsets */
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dst->x_offset = do_center(x_center, dst->width,
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dst->full_width, flags);
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dst->y_offset = do_center(y_center, dst->height,
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dst->full_height, flags);
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flags = 0;
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/* fall through */
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case MXR_GEOMETRY_CROP:
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/* remember center of the area */
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x_center = src->x_offset + src->width / 2;
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y_center = src->y_offset + src->height / 2;
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/* ensure that cropping area lies inside the buffer */
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if (src->full_width < dst->width)
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src->width = dst->width / 2;
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else
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src->width = closest(src->width, dst->width / 2,
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dst->width, flags);
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if (src->width == dst->width)
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geo->x_ratio = 0;
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else
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geo->x_ratio = 1;
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if (src->full_height < dst->height)
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src->height = dst->height / 2;
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else
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src->height = closest(src->height, dst->height / 2,
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dst->height, flags);
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if (src->height == dst->height)
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geo->y_ratio = 0;
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else
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geo->y_ratio = 1;
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/* setup offsets */
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src->x_offset = do_center(x_center, src->width,
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src->full_width, flags);
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src->y_offset = do_center(y_center, src->height,
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src->full_height, flags);
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flags = 0;
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/* fall through */
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case MXR_GEOMETRY_SOURCE:
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src->full_width = clamp_val(src->full_width,
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src->width + src->x_offset, 32767);
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src->full_height = clamp_val(src->full_height,
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src->height + src->y_offset, 2047);
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};
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}
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/* PUBLIC API */
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struct mxr_layer *mxr_graph_layer_create(struct mxr_device *mdev, int idx)
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{
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struct mxr_layer *layer;
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int ret;
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struct mxr_layer_ops ops = {
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.release = mxr_graph_layer_release,
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.buffer_set = mxr_graph_buffer_set,
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.stream_set = mxr_graph_stream_set,
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.format_set = mxr_graph_format_set,
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.fix_geometry = mxr_graph_fix_geometry,
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};
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char name[32];
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sprintf(name, "graph%d", idx);
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layer = mxr_base_layer_create(mdev, idx, name, &ops);
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if (layer == NULL) {
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mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
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goto fail;
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}
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layer->fmt_array = mxr_graph_format;
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layer->fmt_array_size = ARRAY_SIZE(mxr_graph_format);
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ret = mxr_base_layer_register(layer);
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if (ret)
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goto fail_layer;
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return layer;
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fail_layer:
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mxr_base_layer_release(layer);
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fail:
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return NULL;
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}
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