[mirror_ubuntu-zesty-kernel.git] / drivers / media / platform / vsp1 / vsp1_lut.c

/*
 * vsp1_lut.c  --  R-Car VSP1 Look-Up Table
 *
 * Copyright (C) 2013 Renesas 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 <linux/device.h>
#include <linux/gfp.h>
#include <linux/vsp1.h>

#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_lut.h"

#define LUT_MIN_SIZE				4U
#define LUT_MAX_SIZE				8190U

/* -----------------------------------------------------------------------------
 * Device Access
 */

static inline void vsp1_lut_write(struct vsp1_lut *lut, u32 reg, u32 data)
{
	vsp1_mod_write(&lut->entity, reg, data);
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Core Operations
 */

static void lut_configure(struct vsp1_lut *lut, struct vsp1_lut_config *config)
{
	memcpy_toio(lut->entity.vsp1->mmio + VI6_LUT_TABLE, config->lut,
		    sizeof(config->lut));
}

static long lut_ioctl(struct v4l2_subdev *subdev, unsigned int cmd, void *arg)
{
	struct vsp1_lut *lut = to_lut(subdev);

	switch (cmd) {
	case VIDIOC_VSP1_LUT_CONFIG:
		lut_configure(lut, arg);
		return 0;

	default:
		return -ENOIOCTLCMD;
	}
}

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Video Operations
 */

static int lut_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct vsp1_lut *lut = to_lut(subdev);

	if (!enable)
		return 0;

	vsp1_lut_write(lut, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);

	return 0;
}

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

static int lut_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_AHSV8888_1X32,
		MEDIA_BUS_FMT_AYUV8_1X32,
	};
	struct vsp1_lut *lut = to_lut(subdev);

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

		code->code = codes[code->index];
	} else {
		struct v4l2_subdev_pad_config *config;
		struct v4l2_mbus_framefmt *format;

		/* The LUT can't perform format conversion, the sink format is
		 * always identical to the source format.
		 */
		if (code->index)
			return -EINVAL;

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

		format = vsp1_entity_get_pad_format(&lut->entity, config,
						    LUT_PAD_SINK);
		code->code = format->code;
	}

	return 0;
}

static int lut_enum_frame_size(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_pad_config *cfg,
			       struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_lut *lut = to_lut(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

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

	format = vsp1_entity_get_pad_format(&lut->entity, config, fse->pad);

	if (fse->index || fse->code != format->code)
		return -EINVAL;

	if (fse->pad == LUT_PAD_SINK) {
		fse->min_width = LUT_MIN_SIZE;
		fse->max_width = LUT_MAX_SIZE;
		fse->min_height = LUT_MIN_SIZE;
		fse->max_height = LUT_MAX_SIZE;
	} else {
		/* The size on the source pad are fixed and always identical to
		 * the size on the sink pad.
		 */
		fse->min_width = format->width;
		fse->max_width = format->width;
		fse->min_height = format->height;
		fse->max_height = format->height;
	}

	return 0;
}

static int lut_get_format(struct v4l2_subdev *subdev,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_lut *lut = to_lut(subdev);
	struct v4l2_subdev_pad_config *config;

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

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

	return 0;
}

static int lut_set_format(struct v4l2_subdev *subdev,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_lut *lut = to_lut(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

	config = vsp1_entity_get_pad_config(&lut->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_AHSV8888_1X32 &&
	    fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
		fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;

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

	if (fmt->pad == LUT_PAD_SOURCE) {
		/* The LUT output format can't be modified. */
		fmt->format = *format;
		return 0;
	}

	format->width = clamp_t(unsigned int, fmt->format.width,
				LUT_MIN_SIZE, LUT_MAX_SIZE);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 LUT_MIN_SIZE, LUT_MAX_SIZE);
	format->field = V4L2_FIELD_NONE;
	format->colorspace = V4L2_COLORSPACE_SRGB;

	fmt->format = *format;

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

	return 0;
}

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

static struct v4l2_subdev_core_ops lut_core_ops = {
	.ioctl = lut_ioctl,
};

static struct v4l2_subdev_video_ops lut_video_ops = {
	.s_stream = lut_s_stream,
};

static struct v4l2_subdev_pad_ops lut_pad_ops = {
	.init_cfg = vsp1_entity_init_cfg,
	.enum_mbus_code = lut_enum_mbus_code,
	.enum_frame_size = lut_enum_frame_size,
	.get_fmt = lut_get_format,
	.set_fmt = lut_set_format,
};

static struct v4l2_subdev_ops lut_ops = {
	.core	= &lut_core_ops,
	.video	= &lut_video_ops,
	.pad    = &lut_pad_ops,
};

/* -----------------------------------------------------------------------------
 * Initialization and Cleanup
 */

struct vsp1_lut *vsp1_lut_create(struct vsp1_device *vsp1)
{
	struct vsp1_lut *lut;
	int ret;

	lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
	if (lut == NULL)
		return ERR_PTR(-ENOMEM);

	lut->entity.type = VSP1_ENTITY_LUT;

	ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops);
	if (ret < 0)
		return ERR_PTR(ret);

	return lut;
}
Commit	Line	Data
989af883 LP	1	/*
	2	* vsp1_lut.c -- R-Car VSP1 Look-Up Table
	3	*
	4	* Copyright (C) 2013 Renesas Corporation
	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 <linux/device.h>
	15	#include <linux/gfp.h>
	16	#include <linux/vsp1.h>
	17
	18	#include <media/v4l2-subdev.h>
	19
	20	#include "vsp1.h"
	21	#include "vsp1_lut.h"
	22
	23	#define LUT_MIN_SIZE 4U
	24	#define LUT_MAX_SIZE 8190U
	25
	26	/* -----------------------------------------------------------------------------
	27	* Device Access
	28	*/
	29
989af883 LP	30	static inline void vsp1_lut_write(struct vsp1_lut *lut, u32 reg, u32 data)
989af883 LP	31	{
773abafe	32	vsp1_mod_write(&lut->entity, reg, data);
989af883 LP	33	}
	34
	35	/* -----------------------------------------------------------------------------
	36	* V4L2 Subdevice Core Operations
	37	*/
	38
	39	static void lut_configure(struct vsp1_lut lut, struct vsp1_lut_config config)
	40	{
	41	memcpy_toio(lut->entity.vsp1->mmio + VI6_LUT_TABLE, config->lut,
	42	sizeof(config->lut));
	43	}
	44
	45	static long lut_ioctl(struct v4l2_subdev subdev, unsigned int cmd, void arg)
	46	{
	47	struct vsp1_lut *lut = to_lut(subdev);
	48
	49	switch (cmd) {
	50	case VIDIOC_VSP1_LUT_CONFIG:
	51	lut_configure(lut, arg);
	52	return 0;
	53
	54	default:
	55	return -ENOIOCTLCMD;
	56	}
	57	}
	58
	59	/* -----------------------------------------------------------------------------
	60	* V4L2 Subdevice Video Operations
	61	*/
	62
	63	static int lut_s_stream(struct v4l2_subdev *subdev, int enable)
	64	{
	65	struct vsp1_lut *lut = to_lut(subdev);
	66
	67	if (!enable)
	68	return 0;
	69
	70	vsp1_lut_write(lut, VI6_LUT_CTRL, VI6_LUT_CTRL_EN);
	71
	72	return 0;
	73	}
	74
	75	/* -----------------------------------------------------------------------------
	76	* V4L2 Subdevice Pad Operations
	77	*/
	78
	79	static int lut_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	80	struct v4l2_subdev_pad_config *cfg,
989af883 LP	81	struct v4l2_subdev_mbus_code_enum *code)
	82	{
	83	static const unsigned int codes[] = {
27ffaeb0 BB	84	MEDIA_BUS_FMT_ARGB8888_1X32,
	85	MEDIA_BUS_FMT_AHSV8888_1X32,
	86	MEDIA_BUS_FMT_AYUV8_1X32,
989af883	87	};
3f1ccf16	88	struct vsp1_lut *lut = to_lut(subdev);
989af883 LP	89
	90	if (code->pad == LUT_PAD_SINK) {
	91	if (code->index >= ARRAY_SIZE(codes))
	92	return -EINVAL;
	93
	94	code->code = codes[code->index];
	95	} else {
e790c3cb LP	96	struct v4l2_subdev_pad_config *config;
	97	struct v4l2_mbus_framefmt *format;
	98
989af883 LP	99	/* The LUT can't perform format conversion, the sink format is
	100	* always identical to the source format.
	101	*/
	102	if (code->index)
	103	return -EINVAL;
	104
e790c3cb LP	105	config = vsp1_entity_get_pad_config(&lut->entity, cfg,
	106	code->which);
	107	if (!config)
	108	return -EINVAL;
	109
	110	format = vsp1_entity_get_pad_format(&lut->entity, config,
	111	LUT_PAD_SINK);
989af883 LP	112	code->code = format->code;
	113	}
	114
	115	return 0;
	116	}
	117
	118	static int lut_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	119	struct v4l2_subdev_pad_config *cfg,
989af883 LP	120	struct v4l2_subdev_frame_size_enum *fse)
989af883 LP	121	{
5778e749	122	struct vsp1_lut *lut = to_lut(subdev);
e790c3cb	123	struct v4l2_subdev_pad_config *config;
989af883 LP	124	struct v4l2_mbus_framefmt *format;
989af883 LP	125
e790c3cb LP	126	config = vsp1_entity_get_pad_config(&lut->entity, cfg, fse->which);
	127	if (!config)
	128	return -EINVAL;
	129
	130	format = vsp1_entity_get_pad_format(&lut->entity, config, fse->pad);
989af883 LP	131
	132	if (fse->index \|\| fse->code != format->code)
	133	return -EINVAL;
	134
	135	if (fse->pad == LUT_PAD_SINK) {
	136	fse->min_width = LUT_MIN_SIZE;
	137	fse->max_width = LUT_MAX_SIZE;
	138	fse->min_height = LUT_MIN_SIZE;
	139	fse->max_height = LUT_MAX_SIZE;
	140	} else {
	141	/* The size on the source pad are fixed and always identical to
	142	* the size on the sink pad.
	143	*/
	144	fse->min_width = format->width;
	145	fse->max_width = format->width;
	146	fse->min_height = format->height;
	147	fse->max_height = format->height;
	148	}
	149
	150	return 0;
	151	}
	152
1bd0a1bd LP	153	static int lut_get_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	154	struct v4l2_subdev_pad_config *cfg,
989af883 LP	155	struct v4l2_subdev_format *fmt)
	156	{
	157	struct vsp1_lut *lut = to_lut(subdev);
e790c3cb LP	158	struct v4l2_subdev_pad_config *config;
	159
	160	config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which);
	161	if (!config)
	162	return -EINVAL;
989af883	163
e790c3cb LP	164	fmt->format = *vsp1_entity_get_pad_format(&lut->entity, config,
e790c3cb LP	165	fmt->pad);
989af883 LP	166
	167	return 0;
	168	}
	169
1bd0a1bd LP	170	static int lut_set_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	171	struct v4l2_subdev_pad_config *cfg,
989af883 LP	172	struct v4l2_subdev_format *fmt)
	173	{
	174	struct vsp1_lut *lut = to_lut(subdev);
e790c3cb	175	struct v4l2_subdev_pad_config *config;
989af883 LP	176	struct v4l2_mbus_framefmt *format;
989af883 LP	177
e790c3cb LP	178	config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which);
	179	if (!config)
	180	return -EINVAL;
	181
989af883	182	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	183	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	184	fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
	185	fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
	186	fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
989af883	187
e790c3cb	188	format = vsp1_entity_get_pad_format(&lut->entity, config, fmt->pad);
989af883 LP	189
	190	if (fmt->pad == LUT_PAD_SOURCE) {
	191	/* The LUT output format can't be modified. */
	192	fmt->format = *format;
	193	return 0;
	194	}
	195
	196	format->width = clamp_t(unsigned int, fmt->format.width,
	197	LUT_MIN_SIZE, LUT_MAX_SIZE);
	198	format->height = clamp_t(unsigned int, fmt->format.height,
	199	LUT_MIN_SIZE, LUT_MAX_SIZE);
	200	format->field = V4L2_FIELD_NONE;
	201	format->colorspace = V4L2_COLORSPACE_SRGB;
	202
	203	fmt->format = *format;
	204
	205	/* Propagate the format to the source pad. */
e790c3cb LP	206	format = vsp1_entity_get_pad_format(&lut->entity, config,
e790c3cb LP	207	LUT_PAD_SOURCE);
989af883 LP	208	*format = fmt->format;
	209
	210	return 0;
	211	}
	212
	213	/* -----------------------------------------------------------------------------
	214	* V4L2 Subdevice Operations
	215	*/
	216
	217	static struct v4l2_subdev_core_ops lut_core_ops = {
	218	.ioctl = lut_ioctl,
	219	};
	220
	221	static struct v4l2_subdev_video_ops lut_video_ops = {
	222	.s_stream = lut_s_stream,
	223	};
	224
	225	static struct v4l2_subdev_pad_ops lut_pad_ops = {
0efdf0f5	226	.init_cfg = vsp1_entity_init_cfg,
989af883 LP	227	.enum_mbus_code = lut_enum_mbus_code,
	228	.enum_frame_size = lut_enum_frame_size,
	229	.get_fmt = lut_get_format,
	230	.set_fmt = lut_set_format,
	231	};
	232
	233	static struct v4l2_subdev_ops lut_ops = {
	234	.core = &lut_core_ops,
	235	.video = &lut_video_ops,
	236	.pad = &lut_pad_ops,
	237	};
	238
	239	/* -----------------------------------------------------------------------------
	240	* Initialization and Cleanup
	241	*/
	242
	243	struct vsp1_lut vsp1_lut_create(struct vsp1_device vsp1)
	244	{
989af883 LP	245	struct vsp1_lut *lut;
	246	int ret;
	247
	248	lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
	249	if (lut == NULL)
	250	return ERR_PTR(-ENOMEM);
	251
	252	lut->entity.type = VSP1_ENTITY_LUT;
989af883	253
823329df	254	ret = vsp1_entity_init(vsp1, &lut->entity, "lut", 2, &lut_ops);
989af883 LP	255	if (ret < 0)
	256	return ERR_PTR(ret);
	257
989af883 LP	258	return lut;
989af883 LP	259	}