125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* vsp1_rwpf.c -- R-Car VSP1 Read and Write Pixel Formatters
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*
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* Copyright (C) 2013 Renesas Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <media/v4l2-subdev.h>
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#include "vsp1.h"
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#include "vsp1_rwpf.h"
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#include "vsp1_video.h"
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#define RWPF_MIN_WIDTH 1
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#define RWPF_MIN_HEIGHT 1
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/* -----------------------------------------------------------------------------
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* V4L2 Subdevice Pad Operations
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*/
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int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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static const unsigned int codes[] = {
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V4L2_MBUS_FMT_ARGB8888_1X32,
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V4L2_MBUS_FMT_AYUV8_1X32,
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};
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if (code->index >= ARRAY_SIZE(codes))
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return -EINVAL;
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code->code = codes[code->index];
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return 0;
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}
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int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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struct vsp1_rwpf *rwpf = to_rwpf(subdev);
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struct v4l2_mbus_framefmt *format;
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format = v4l2_subdev_get_try_format(fh, fse->pad);
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if (fse->index || fse->code != format->code)
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return -EINVAL;
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if (fse->pad == RWPF_PAD_SINK) {
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fse->min_width = RWPF_MIN_WIDTH;
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fse->max_width = rwpf->max_width;
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fse->min_height = RWPF_MIN_HEIGHT;
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fse->max_height = rwpf->max_height;
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} else {
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/* The size on the source pad are fixed and always identical to
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* the size on the sink pad.
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*/
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fse->min_width = format->width;
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fse->max_width = format->width;
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fse->min_height = format->height;
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fse->max_height = format->height;
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}
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return 0;
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}
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int vsp1_rwpf_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_format *fmt)
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{
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struct vsp1_rwpf *rwpf = to_rwpf(subdev);
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fmt->format = *vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
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fmt->which);
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return 0;
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}
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int vsp1_rwpf_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_format *fmt)
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{
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struct vsp1_rwpf *rwpf = to_rwpf(subdev);
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struct v4l2_mbus_framefmt *format;
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/* Default to YUV if the requested format is not supported. */
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if (fmt->format.code != V4L2_MBUS_FMT_ARGB8888_1X32 &&
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fmt->format.code != V4L2_MBUS_FMT_AYUV8_1X32)
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fmt->format.code = V4L2_MBUS_FMT_AYUV8_1X32;
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format = vsp1_entity_get_pad_format(&rwpf->entity, fh, fmt->pad,
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fmt->which);
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if (fmt->pad == RWPF_PAD_SOURCE) {
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/* The RWPF performs format conversion but can't scale, only the
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* format code can be changed on the source pad.
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*/
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format->code = fmt->format.code;
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fmt->format = *format;
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return 0;
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}
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format->code = fmt->format.code;
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format->width = clamp_t(unsigned int, fmt->format.width,
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RWPF_MIN_WIDTH, rwpf->max_width);
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format->height = clamp_t(unsigned int, fmt->format.height,
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RWPF_MIN_HEIGHT, rwpf->max_height);
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format->field = V4L2_FIELD_NONE;
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format->colorspace = V4L2_COLORSPACE_SRGB;
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fmt->format = *format;
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/* Propagate the format to the source pad. */
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format = vsp1_entity_get_pad_format(&rwpf->entity, fh, RWPF_PAD_SOURCE,
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fmt->which);
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*format = fmt->format;
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return 0;
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}
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