[deliverable/linux.git] / drivers / media / platform / vsp1 / vsp1_rwpf.c

/*
 * vsp1_rwpf.c  --  R-Car VSP1 Read and Write Pixel Formatters
 *
 * Copyright (C) 2013-2014 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.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 Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_rwpf.h"
#include "vsp1_video.h"

#define RWPF_MIN_WIDTH				1
#define RWPF_MIN_HEIGHT				1

struct v4l2_rect *vsp1_rwpf_get_crop(struct vsp1_rwpf *rwpf,
				     struct v4l2_subdev_pad_config *config)
{
	return v4l2_subdev_get_try_crop(&rwpf->entity.subdev, config,
					RWPF_PAD_SINK);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Pad Operations
 */

static int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
				    struct v4l2_subdev_pad_config *cfg,
				    struct v4l2_subdev_mbus_code_enum *code)
{
	static const unsigned int codes[] = {
		MEDIA_BUS_FMT_ARGB8888_1X32,
		MEDIA_BUS_FMT_AYUV8_1X32,
	};

	if (code->index >= ARRAY_SIZE(codes))
		return -EINVAL;

	code->code = codes[code->index];

	return 0;
}

static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
				     struct v4l2_subdev_pad_config *cfg,
				     struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_rwpf *rwpf = to_rwpf(subdev);

	return vsp1_subdev_enum_frame_size(subdev, cfg, fse, RWPF_MIN_WIDTH,
					   RWPF_MIN_HEIGHT, rwpf->max_width,
					   rwpf->max_height);
}

static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
				struct v4l2_subdev_pad_config *cfg,
				struct v4l2_subdev_format *fmt)
{
	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;
	struct v4l2_rect *crop;

	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
	if (!config)
		return -EINVAL;

	/* Default to YUV if the requested format is not supported. */
	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	    fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
		fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;

	format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);

	if (fmt->pad == RWPF_PAD_SOURCE) {
		/* The RWPF performs format conversion but can't scale, only the
		 * format code can be changed on the source pad.
		 */
		format->code = fmt->format.code;
		fmt->format = *format;
		return 0;
	}

	format->code = fmt->format.code;
	format->width = clamp_t(unsigned int, fmt->format.width,
				RWPF_MIN_WIDTH, rwpf->max_width);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 RWPF_MIN_HEIGHT, rwpf->max_height);
	format->field = V4L2_FIELD_NONE;
	format->colorspace = V4L2_COLORSPACE_SRGB;

	fmt->format = *format;

	/* Update the sink crop rectangle. */
	crop = vsp1_rwpf_get_crop(rwpf, config);
	crop->left = 0;
	crop->top = 0;
	crop->width = fmt->format.width;
	crop->height = fmt->format.height;

	/* Propagate the format to the source pad. */
	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
					    RWPF_PAD_SOURCE);
	*format = fmt->format;

	return 0;
}

static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
				   struct v4l2_subdev_pad_config *cfg,
				   struct v4l2_subdev_selection *sel)
{
	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

	/* Cropping is implemented on the sink pad. */
	if (sel->pad != RWPF_PAD_SINK)
		return -EINVAL;

	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
	if (!config)
		return -EINVAL;

	switch (sel->target) {
	case V4L2_SEL_TGT_CROP:
		sel->r = *vsp1_rwpf_get_crop(rwpf, config);
		break;

	case V4L2_SEL_TGT_CROP_BOUNDS:
		format = vsp1_entity_get_pad_format(&rwpf->entity, config,
						    RWPF_PAD_SINK);
		sel->r.left = 0;
		sel->r.top = 0;
		sel->r.width = format->width;
		sel->r.height = format->height;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
				   struct v4l2_subdev_pad_config *cfg,
				   struct v4l2_subdev_selection *sel)
{
	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;
	struct v4l2_rect *crop;

	/* Cropping is implemented on the sink pad. */
	if (sel->pad != RWPF_PAD_SINK)
		return -EINVAL;

	if (sel->target != V4L2_SEL_TGT_CROP)
		return -EINVAL;

	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
	if (!config)
		return -EINVAL;

	/* Make sure the crop rectangle is entirely contained in the image. The
	 * WPF top and left offsets are limited to 255.
	 */
	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
					    RWPF_PAD_SINK);

	/* Restrict the crop rectangle coordinates to multiples of 2 to avoid
	 * shifting the color plane.
	 */
	if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
		sel->r.left = ALIGN(sel->r.left, 2);
		sel->r.top = ALIGN(sel->r.top, 2);
		sel->r.width = round_down(sel->r.width, 2);
		sel->r.height = round_down(sel->r.height, 2);
	}

	sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
	sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
	if (rwpf->entity.type == VSP1_ENTITY_WPF) {
		sel->r.left = min_t(unsigned int, sel->r.left, 255);
		sel->r.top = min_t(unsigned int, sel->r.top, 255);
	}
	sel->r.width = min_t(unsigned int, sel->r.width,
			     format->width - sel->r.left);
	sel->r.height = min_t(unsigned int, sel->r.height,
			      format->height - sel->r.top);

	crop = vsp1_rwpf_get_crop(rwpf, config);
	*crop = sel->r;

	/* Propagate the format to the source pad. */
	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
					    RWPF_PAD_SOURCE);
	format->width = crop->width;
	format->height = crop->height;

	return 0;
}

const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
	.init_cfg = vsp1_entity_init_cfg,
	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
	.enum_frame_size = vsp1_rwpf_enum_frame_size,
	.get_fmt = vsp1_subdev_get_pad_format,
	.set_fmt = vsp1_rwpf_set_format,
	.get_selection = vsp1_rwpf_get_selection,
	.set_selection = vsp1_rwpf_set_selection,
};

/* -----------------------------------------------------------------------------
 * Controls
 */

static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct vsp1_rwpf *rwpf =
		container_of(ctrl->handler, struct vsp1_rwpf, ctrls);

	switch (ctrl->id) {
	case V4L2_CID_ALPHA_COMPONENT:
		rwpf->alpha = ctrl->val;
		break;
	}

	return 0;
}

static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
	.s_ctrl = vsp1_rwpf_s_ctrl,
};

int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
{
	v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
	v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
			  V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);

	rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;

	return rwpf->ctrls.error;
}
Commit	Line	Data
26e0ca22 LP	1	/*
	2	* vsp1_rwpf.c -- R-Car VSP1 Read and Write Pixel Formatters
	3	*
8a1edc55	4	* Copyright (C) 2013-2014 Renesas Electronics Corporation
26e0ca22 LP	5	*
	6	* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
	14	#include <media/v4l2-subdev.h>
	15
	16	#include "vsp1.h"
	17	#include "vsp1_rwpf.h"
	18	#include "vsp1_video.h"
	19
	20	#define RWPF_MIN_WIDTH 1
	21	#define RWPF_MIN_HEIGHT 1
	22
c6c8efb6 LP	23	struct v4l2_rect vsp1_rwpf_get_crop(struct vsp1_rwpf rwpf,
	24	struct v4l2_subdev_pad_config *config)
	25	{
	26	return v4l2_subdev_get_try_crop(&rwpf->entity.subdev, config,
	27	RWPF_PAD_SINK);
	28	}
	29
26e0ca22 LP	30	/* -----------------------------------------------------------------------------
	31	* V4L2 Subdevice Pad Operations
	32	*/
	33
c6c8efb6 LP	34	static int vsp1_rwpf_enum_mbus_code(struct v4l2_subdev *subdev,
	35	struct v4l2_subdev_pad_config *cfg,
	36	struct v4l2_subdev_mbus_code_enum *code)
26e0ca22 LP	37	{
26e0ca22 LP	38	static const unsigned int codes[] = {
27ffaeb0 BB	39	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	40	MEDIA_BUS_FMT_AYUV8_1X32,
26e0ca22 LP	41	};
	42
	43	if (code->index >= ARRAY_SIZE(codes))
	44	return -EINVAL;
	45
	46	code->code = codes[code->index];
	47
	48	return 0;
	49	}
	50
c6c8efb6 LP	51	static int vsp1_rwpf_enum_frame_size(struct v4l2_subdev *subdev,
	52	struct v4l2_subdev_pad_config *cfg,
	53	struct v4l2_subdev_frame_size_enum *fse)
26e0ca22 LP	54	{
26e0ca22 LP	55	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
26e0ca22	56
076e834f LP	57	return vsp1_subdev_enum_frame_size(subdev, cfg, fse, RWPF_MIN_WIDTH,
	58	RWPF_MIN_HEIGHT, rwpf->max_width,
	59	rwpf->max_height);
26e0ca22 LP	60	}
26e0ca22 LP	61
c6c8efb6 LP	62	static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
	63	struct v4l2_subdev_pad_config *cfg,
	64	struct v4l2_subdev_format *fmt)
26e0ca22 LP	65	{
26e0ca22 LP	66	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
e790c3cb	67	struct v4l2_subdev_pad_config *config;
26e0ca22	68	struct v4l2_mbus_framefmt *format;
e5ad37b6	69	struct v4l2_rect *crop;
26e0ca22	70
e790c3cb LP	71	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
	72	if (!config)
	73	return -EINVAL;
	74
26e0ca22	75	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	76	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	77	fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
	78	fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
26e0ca22	79
e790c3cb	80	format = vsp1_entity_get_pad_format(&rwpf->entity, config, fmt->pad);
26e0ca22 LP	81
	82	if (fmt->pad == RWPF_PAD_SOURCE) {
	83	/* The RWPF performs format conversion but can't scale, only the
	84	* format code can be changed on the source pad.
	85	*/
	86	format->code = fmt->format.code;
	87	fmt->format = *format;
	88	return 0;
	89	}
	90
	91	format->code = fmt->format.code;
	92	format->width = clamp_t(unsigned int, fmt->format.width,
	93	RWPF_MIN_WIDTH, rwpf->max_width);
	94	format->height = clamp_t(unsigned int, fmt->format.height,
	95	RWPF_MIN_HEIGHT, rwpf->max_height);
	96	format->field = V4L2_FIELD_NONE;
	97	format->colorspace = V4L2_COLORSPACE_SRGB;
	98
	99	fmt->format = *format;
	100
e5ad37b6	101	/* Update the sink crop rectangle. */
b7e5107e	102	crop = vsp1_rwpf_get_crop(rwpf, config);
e5ad37b6 LP	103	crop->left = 0;
	104	crop->top = 0;
	105	crop->width = fmt->format.width;
	106	crop->height = fmt->format.height;
	107
26e0ca22	108	/* Propagate the format to the source pad. */
e790c3cb LP	109	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
e790c3cb LP	110	RWPF_PAD_SOURCE);
26e0ca22 LP	111	*format = fmt->format;
	112
	113	return 0;
	114	}
e5ad37b6	115
c6c8efb6 LP	116	static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
	117	struct v4l2_subdev_pad_config *cfg,
	118	struct v4l2_subdev_selection *sel)
e5ad37b6 LP	119	{
e5ad37b6 LP	120	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
e790c3cb	121	struct v4l2_subdev_pad_config *config;
e5ad37b6 LP	122	struct v4l2_mbus_framefmt *format;
	123
	124	/* Cropping is implemented on the sink pad. */
	125	if (sel->pad != RWPF_PAD_SINK)
	126	return -EINVAL;
	127
e790c3cb LP	128	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
	129	if (!config)
	130	return -EINVAL;
	131
e5ad37b6 LP	132	switch (sel->target) {
e5ad37b6 LP	133	case V4L2_SEL_TGT_CROP:
b7e5107e	134	sel->r = *vsp1_rwpf_get_crop(rwpf, config);
e5ad37b6 LP	135	break;
	136
	137	case V4L2_SEL_TGT_CROP_BOUNDS:
e790c3cb LP	138	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
e790c3cb LP	139	RWPF_PAD_SINK);
e5ad37b6 LP	140	sel->r.left = 0;
	141	sel->r.top = 0;
	142	sel->r.width = format->width;
	143	sel->r.height = format->height;
	144	break;
	145
	146	default:
	147	return -EINVAL;
	148	}
	149
	150	return 0;
	151	}
	152
c6c8efb6 LP	153	static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
	154	struct v4l2_subdev_pad_config *cfg,
	155	struct v4l2_subdev_selection *sel)
e5ad37b6 LP	156	{
e5ad37b6 LP	157	struct vsp1_rwpf *rwpf = to_rwpf(subdev);
e790c3cb	158	struct v4l2_subdev_pad_config *config;
e5ad37b6 LP	159	struct v4l2_mbus_framefmt *format;
	160	struct v4l2_rect *crop;
	161
	162	/* Cropping is implemented on the sink pad. */
	163	if (sel->pad != RWPF_PAD_SINK)
	164	return -EINVAL;
	165
	166	if (sel->target != V4L2_SEL_TGT_CROP)
	167	return -EINVAL;
	168
e790c3cb LP	169	config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
	170	if (!config)
	171	return -EINVAL;
	172
e5ad37b6 LP	173	/* Make sure the crop rectangle is entirely contained in the image. The
	174	* WPF top and left offsets are limited to 255.
	175	*/
e790c3cb LP	176	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
e790c3cb LP	177	RWPF_PAD_SINK);
85a0638b DHG	178
	179	/* Restrict the crop rectangle coordinates to multiples of 2 to avoid
	180	* shifting the color plane.
	181	*/
	182	if (format->code == MEDIA_BUS_FMT_AYUV8_1X32) {
	183	sel->r.left = ALIGN(sel->r.left, 2);
	184	sel->r.top = ALIGN(sel->r.top, 2);
	185	sel->r.width = round_down(sel->r.width, 2);
	186	sel->r.height = round_down(sel->r.height, 2);
	187	}
	188
e5ad37b6 LP	189	sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
	190	sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
	191	if (rwpf->entity.type == VSP1_ENTITY_WPF) {
	192	sel->r.left = min_t(unsigned int, sel->r.left, 255);
	193	sel->r.top = min_t(unsigned int, sel->r.top, 255);
	194	}
	195	sel->r.width = min_t(unsigned int, sel->r.width,
	196	format->width - sel->r.left);
	197	sel->r.height = min_t(unsigned int, sel->r.height,
	198	format->height - sel->r.top);
	199
b7e5107e	200	crop = vsp1_rwpf_get_crop(rwpf, config);
e5ad37b6 LP	201	*crop = sel->r;
	202
	203	/* Propagate the format to the source pad. */
e790c3cb LP	204	format = vsp1_entity_get_pad_format(&rwpf->entity, config,
e790c3cb LP	205	RWPF_PAD_SOURCE);
e5ad37b6 LP	206	format->width = crop->width;
	207	format->height = crop->height;
	208
	209	return 0;
	210	}
bd2fdd5a	211
c6c8efb6 LP	212	const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
	213	.init_cfg = vsp1_entity_init_cfg,
	214	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
	215	.enum_frame_size = vsp1_rwpf_enum_frame_size,
3f557220	216	.get_fmt = vsp1_subdev_get_pad_format,
c6c8efb6 LP	217	.set_fmt = vsp1_rwpf_set_format,
	218	.get_selection = vsp1_rwpf_get_selection,
	219	.set_selection = vsp1_rwpf_set_selection,
	220	};
	221
bd2fdd5a LP	222	/* -----------------------------------------------------------------------------
	223	* Controls
	224	*/
	225
	226	static int vsp1_rwpf_s_ctrl(struct v4l2_ctrl *ctrl)
	227	{
	228	struct vsp1_rwpf *rwpf =
	229	container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
	230
	231	switch (ctrl->id) {
	232	case V4L2_CID_ALPHA_COMPONENT:
	233	rwpf->alpha = ctrl->val;
	234	break;
	235	}
	236
	237	return 0;
	238	}
	239
	240	static const struct v4l2_ctrl_ops vsp1_rwpf_ctrl_ops = {
	241	.s_ctrl = vsp1_rwpf_s_ctrl,
	242	};
	243
894dde5c	244	int vsp1_rwpf_init_ctrls(struct vsp1_rwpf *rwpf, unsigned int ncontrols)
bd2fdd5a	245	{
894dde5c	246	v4l2_ctrl_handler_init(&rwpf->ctrls, ncontrols + 1);
bd2fdd5a LP	247	v4l2_ctrl_new_std(&rwpf->ctrls, &vsp1_rwpf_ctrl_ops,
	248	V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 255);
	249
	250	rwpf->entity.subdev.ctrl_handler = &rwpf->ctrls;
	251
	252	return rwpf->ctrls.error;
	253	}