[deliverable/linux.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_write(lut->entity.vsp1, 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);
	struct v4l2_mbus_framefmt *format;

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

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

		format = vsp1_entity_get_pad_format(&lut->entity, cfg,
						    LUT_PAD_SINK, code->which);
		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_mbus_framefmt *format;

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

	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);

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

	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_mbus_framefmt *format;

	/* 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, cfg, fmt->pad,
					    fmt->which);

	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, cfg, LUT_PAD_SOURCE,
					    fmt->which);
	*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 = {
	.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 v4l2_subdev *subdev;
	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, 2);
	if (ret < 0)
		return ERR_PTR(ret);

	/* Initialize the V4L2 subdev. */
	subdev = &lut->entity.subdev;
	v4l2_subdev_init(subdev, &lut_ops);

	subdev->entity.ops = &vsp1->media_ops;
	subdev->internal_ops = &vsp1_subdev_internal_ops;
	snprintf(subdev->name, sizeof(subdev->name), "%s lut",
		 dev_name(vsp1->dev));
	v4l2_set_subdevdata(subdev, lut);
	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	vsp1_entity_init_formats(subdev, NULL);

	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)
	31	{
	32	vsp1_write(lut->entity.vsp1, reg, data);
	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	struct v4l2_mbus_framefmt *format;
	90
	91	if (code->pad == LUT_PAD_SINK) {
	92	if (code->index >= ARRAY_SIZE(codes))
	93	return -EINVAL;
	94
	95	code->code = codes[code->index];
	96	} else {
	97	/* The LUT can't perform format conversion, the sink format is
	98	* always identical to the source format.
	99	*/
	100	if (code->index)
	101	return -EINVAL;
	102
3f1ccf16 HV	103	format = vsp1_entity_get_pad_format(&lut->entity, cfg,
3f1ccf16 HV	104	LUT_PAD_SINK, code->which);
989af883 LP	105	code->code = format->code;
	106	}
	107
	108	return 0;
	109	}
	110
	111	static int lut_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	112	struct v4l2_subdev_pad_config *cfg,
989af883 LP	113	struct v4l2_subdev_frame_size_enum *fse)
989af883 LP	114	{
5778e749	115	struct vsp1_lut *lut = to_lut(subdev);
989af883 LP	116	struct v4l2_mbus_framefmt *format;
989af883 LP	117
5778e749 HV	118	format = vsp1_entity_get_pad_format(&lut->entity, cfg,
5778e749 HV	119	fse->pad, fse->which);
989af883 LP	120
	121	if (fse->index \|\| fse->code != format->code)
	122	return -EINVAL;
	123
	124	if (fse->pad == LUT_PAD_SINK) {
	125	fse->min_width = LUT_MIN_SIZE;
	126	fse->max_width = LUT_MAX_SIZE;
	127	fse->min_height = LUT_MIN_SIZE;
	128	fse->max_height = LUT_MAX_SIZE;
	129	} else {
	130	/* The size on the source pad are fixed and always identical to
	131	* the size on the sink pad.
	132	*/
	133	fse->min_width = format->width;
	134	fse->max_width = format->width;
	135	fse->min_height = format->height;
	136	fse->max_height = format->height;
	137	}
	138
	139	return 0;
	140	}
	141
f7234138	142	static int lut_get_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
989af883 LP	143	struct v4l2_subdev_format *fmt)
	144	{
	145	struct vsp1_lut *lut = to_lut(subdev);
	146
f7234138	147	fmt->format = *vsp1_entity_get_pad_format(&lut->entity, cfg, fmt->pad,
989af883 LP	148	fmt->which);
	149
	150	return 0;
	151	}
	152
f7234138	153	static int lut_set_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
989af883 LP	154	struct v4l2_subdev_format *fmt)
	155	{
	156	struct vsp1_lut *lut = to_lut(subdev);
	157	struct v4l2_mbus_framefmt *format;
	158
	159	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	160	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	161	fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
	162	fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
	163	fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
989af883	164
f7234138	165	format = vsp1_entity_get_pad_format(&lut->entity, cfg, fmt->pad,
989af883 LP	166	fmt->which);
	167
	168	if (fmt->pad == LUT_PAD_SOURCE) {
	169	/* The LUT output format can't be modified. */
	170	fmt->format = *format;
	171	return 0;
	172	}
	173
	174	format->width = clamp_t(unsigned int, fmt->format.width,
	175	LUT_MIN_SIZE, LUT_MAX_SIZE);
	176	format->height = clamp_t(unsigned int, fmt->format.height,
	177	LUT_MIN_SIZE, LUT_MAX_SIZE);
	178	format->field = V4L2_FIELD_NONE;
	179	format->colorspace = V4L2_COLORSPACE_SRGB;
	180
	181	fmt->format = *format;
	182
	183	/* Propagate the format to the source pad. */
f7234138	184	format = vsp1_entity_get_pad_format(&lut->entity, cfg, LUT_PAD_SOURCE,
989af883 LP	185	fmt->which);
	186	*format = fmt->format;
	187
	188	return 0;
	189	}
	190
	191	/* -----------------------------------------------------------------------------
	192	* V4L2 Subdevice Operations
	193	*/
	194
	195	static struct v4l2_subdev_core_ops lut_core_ops = {
	196	.ioctl = lut_ioctl,
	197	};
	198
	199	static struct v4l2_subdev_video_ops lut_video_ops = {
	200	.s_stream = lut_s_stream,
	201	};
	202
	203	static struct v4l2_subdev_pad_ops lut_pad_ops = {
	204	.enum_mbus_code = lut_enum_mbus_code,
	205	.enum_frame_size = lut_enum_frame_size,
	206	.get_fmt = lut_get_format,
	207	.set_fmt = lut_set_format,
	208	};
	209
	210	static struct v4l2_subdev_ops lut_ops = {
	211	.core = &lut_core_ops,
	212	.video = &lut_video_ops,
	213	.pad = &lut_pad_ops,
	214	};
	215
	216	/* -----------------------------------------------------------------------------
	217	* Initialization and Cleanup
	218	*/
	219
	220	struct vsp1_lut vsp1_lut_create(struct vsp1_device vsp1)
	221	{
	222	struct v4l2_subdev *subdev;
	223	struct vsp1_lut *lut;
	224	int ret;
	225
	226	lut = devm_kzalloc(vsp1->dev, sizeof(*lut), GFP_KERNEL);
	227	if (lut == NULL)
	228	return ERR_PTR(-ENOMEM);
	229
	230	lut->entity.type = VSP1_ENTITY_LUT;
989af883 LP	231
	232	ret = vsp1_entity_init(vsp1, &lut->entity, 2);
	233	if (ret < 0)
	234	return ERR_PTR(ret);
	235
	236	/* Initialize the V4L2 subdev. */
	237	subdev = &lut->entity.subdev;
	238	v4l2_subdev_init(subdev, &lut_ops);
	239
babca007	240	subdev->entity.ops = &vsp1->media_ops;
989af883 LP	241	subdev->internal_ops = &vsp1_subdev_internal_ops;
	242	snprintf(subdev->name, sizeof(subdev->name), "%s lut",
	243	dev_name(vsp1->dev));
	244	v4l2_set_subdevdata(subdev, lut);
	245	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	246
	247	vsp1_entity_init_formats(subdev, NULL);
	248
	249	return lut;
	250	}