[deliverable/linux.git] / drivers / media / platform / vsp1 / vsp1_hsit.c

/*
 * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
 *
 * 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 <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_hsit.h"

#define HSIT_MIN_SIZE				4U
#define HSIT_MAX_SIZE				8190U

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

static inline void vsp1_hsit_write(struct vsp1_hsit *hsit, u32 reg, u32 data)
{
	vsp1_write(hsit->entity.vsp1, reg, data);
}

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

static int hsit_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	if (!enable)
		return 0;

	if (hsit->inverse)
		vsp1_hsit_write(hsit, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
	else
		vsp1_hsit_write(hsit, VI6_HST_CTRL, VI6_HST_CTRL_EN);

	return 0;
}

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

static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_pad_config *cfg,
			       struct v4l2_subdev_mbus_code_enum *code)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

	if (code->index > 0)
		return -EINVAL;

	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
	    (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
		code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
	else
		code->code = MEDIA_BUS_FMT_AHSV8888_1X32;

	return 0;
}

static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
				struct v4l2_subdev_pad_config *cfg,
				struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);
	struct v4l2_mbus_framefmt *format;

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

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

	if (fse->pad == HSIT_PAD_SINK) {
		fse->min_width = HSIT_MIN_SIZE;
		fse->max_width = HSIT_MAX_SIZE;
		fse->min_height = HSIT_MIN_SIZE;
		fse->max_height = HSIT_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 hsit_get_format(struct v4l2_subdev *subdev,
			   struct v4l2_subdev_pad_config *cfg,
			   struct v4l2_subdev_format *fmt)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);

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

	return 0;
}

static int hsit_set_format(struct v4l2_subdev *subdev,
			   struct v4l2_subdev_pad_config *cfg,
			   struct v4l2_subdev_format *fmt)
{
	struct vsp1_hsit *hsit = to_hsit(subdev);
	struct v4l2_mbus_framefmt *format;

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

	if (fmt->pad == HSIT_PAD_SOURCE) {
		/* The HST and HSI output format code and resolution can't be
		 * modified.
		 */
		fmt->format = *format;
		return 0;
	}

	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
		     : MEDIA_BUS_FMT_ARGB8888_1X32;
	format->width = clamp_t(unsigned int, fmt->format.width,
				HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 HSIT_MIN_SIZE, HSIT_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(&hsit->entity, cfg, HSIT_PAD_SOURCE,
					    fmt->which);
	*format = fmt->format;
	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
		     : MEDIA_BUS_FMT_AHSV8888_1X32;

	return 0;
}

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

static struct v4l2_subdev_video_ops hsit_video_ops = {
	.s_stream = hsit_s_stream,
};

static struct v4l2_subdev_pad_ops hsit_pad_ops = {
	.enum_mbus_code = hsit_enum_mbus_code,
	.enum_frame_size = hsit_enum_frame_size,
	.get_fmt = hsit_get_format,
	.set_fmt = hsit_set_format,
};

static struct v4l2_subdev_ops hsit_ops = {
	.video	= &hsit_video_ops,
	.pad    = &hsit_pad_ops,
};

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

struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
{
	struct v4l2_subdev *subdev;
	struct vsp1_hsit *hsit;
	int ret;

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

	hsit->inverse = inverse;

	if (inverse)
		hsit->entity.type = VSP1_ENTITY_HSI;
	else
		hsit->entity.type = VSP1_ENTITY_HST;

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

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

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

	vsp1_entity_init_formats(subdev, NULL);

	return hsit;
}
Commit	Line	Data
5cdf5741 LP	1	/*
	2	* vsp1_hsit.c -- R-Car VSP1 Hue Saturation value (Inverse) Transform
	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
	17	#include <media/v4l2-subdev.h>
	18
	19	#include "vsp1.h"
	20	#include "vsp1_hsit.h"
	21
	22	#define HSIT_MIN_SIZE 4U
	23	#define HSIT_MAX_SIZE 8190U
	24
	25	/* -----------------------------------------------------------------------------
	26	* Device Access
	27	*/
	28
5cdf5741 LP	29	static inline void vsp1_hsit_write(struct vsp1_hsit *hsit, u32 reg, u32 data)
	30	{
	31	vsp1_write(hsit->entity.vsp1, reg, data);
	32	}
	33
	34	/* -----------------------------------------------------------------------------
	35	* V4L2 Subdevice Core Operations
	36	*/
	37
	38	static int hsit_s_stream(struct v4l2_subdev *subdev, int enable)
	39	{
	40	struct vsp1_hsit *hsit = to_hsit(subdev);
	41
	42	if (!enable)
	43	return 0;
	44
	45	if (hsit->inverse)
	46	vsp1_hsit_write(hsit, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
	47	else
	48	vsp1_hsit_write(hsit, VI6_HST_CTRL, VI6_HST_CTRL_EN);
	49
	50	return 0;
	51	}
	52
	53	/* -----------------------------------------------------------------------------
	54	* V4L2 Subdevice Pad Operations
	55	*/
	56
	57	static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	58	struct v4l2_subdev_pad_config *cfg,
5cdf5741 LP	59	struct v4l2_subdev_mbus_code_enum *code)
	60	{
	61	struct vsp1_hsit *hsit = to_hsit(subdev);
	62
	63	if (code->index > 0)
	64	return -EINVAL;
	65
	66	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) \|
	67	(code->pad == HSIT_PAD_SOURCE && hsit->inverse))
27ffaeb0	68	code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
5cdf5741	69	else
27ffaeb0	70	code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
5cdf5741 LP	71
	72	return 0;
	73	}
	74
	75	static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	76	struct v4l2_subdev_pad_config *cfg,
5cdf5741 LP	77	struct v4l2_subdev_frame_size_enum *fse)
5cdf5741 LP	78	{
5778e749	79	struct vsp1_hsit *hsit = to_hsit(subdev);
5cdf5741 LP	80	struct v4l2_mbus_framefmt *format;
5cdf5741 LP	81
5778e749 HV	82	format = vsp1_entity_get_pad_format(&hsit->entity, cfg, fse->pad,
5778e749 HV	83	fse->which);
5cdf5741 LP	84
	85	if (fse->index \|\| fse->code != format->code)
	86	return -EINVAL;
	87
	88	if (fse->pad == HSIT_PAD_SINK) {
	89	fse->min_width = HSIT_MIN_SIZE;
	90	fse->max_width = HSIT_MAX_SIZE;
	91	fse->min_height = HSIT_MIN_SIZE;
	92	fse->max_height = HSIT_MAX_SIZE;
	93	} else {
	94	/* The size on the source pad are fixed and always identical to
	95	* the size on the sink pad.
	96	*/
	97	fse->min_width = format->width;
	98	fse->max_width = format->width;
	99	fse->min_height = format->height;
	100	fse->max_height = format->height;
	101	}
	102
	103	return 0;
	104	}
	105
	106	static int hsit_get_format(struct v4l2_subdev *subdev,
f7234138	107	struct v4l2_subdev_pad_config *cfg,
5cdf5741 LP	108	struct v4l2_subdev_format *fmt)
	109	{
	110	struct vsp1_hsit *hsit = to_hsit(subdev);
	111
f7234138	112	fmt->format = *vsp1_entity_get_pad_format(&hsit->entity, cfg, fmt->pad,
5cdf5741 LP	113	fmt->which);
	114
	115	return 0;
	116	}
	117
	118	static int hsit_set_format(struct v4l2_subdev *subdev,
f7234138	119	struct v4l2_subdev_pad_config *cfg,
5cdf5741 LP	120	struct v4l2_subdev_format *fmt)
	121	{
	122	struct vsp1_hsit *hsit = to_hsit(subdev);
	123	struct v4l2_mbus_framefmt *format;
	124
f7234138	125	format = vsp1_entity_get_pad_format(&hsit->entity, cfg, fmt->pad,
5cdf5741 LP	126	fmt->which);
	127
	128	if (fmt->pad == HSIT_PAD_SOURCE) {
	129	/* The HST and HSI output format code and resolution can't be
	130	* modified.
	131	*/
	132	fmt->format = *format;
	133	return 0;
	134	}
	135
27ffaeb0 BB	136	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
27ffaeb0 BB	137	: MEDIA_BUS_FMT_ARGB8888_1X32;
5cdf5741 LP	138	format->width = clamp_t(unsigned int, fmt->format.width,
	139	HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	140	format->height = clamp_t(unsigned int, fmt->format.height,
	141	HSIT_MIN_SIZE, HSIT_MAX_SIZE);
	142	format->field = V4L2_FIELD_NONE;
	143	format->colorspace = V4L2_COLORSPACE_SRGB;
	144
	145	fmt->format = *format;
	146
	147	/* Propagate the format to the source pad. */
f7234138	148	format = vsp1_entity_get_pad_format(&hsit->entity, cfg, HSIT_PAD_SOURCE,
5cdf5741 LP	149	fmt->which);
5cdf5741 LP	150	*format = fmt->format;
27ffaeb0 BB	151	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
27ffaeb0 BB	152	: MEDIA_BUS_FMT_AHSV8888_1X32;
5cdf5741 LP	153
	154	return 0;
	155	}
	156
	157	/* -----------------------------------------------------------------------------
	158	* V4L2 Subdevice Operations
	159	*/
	160
	161	static struct v4l2_subdev_video_ops hsit_video_ops = {
	162	.s_stream = hsit_s_stream,
	163	};
	164
	165	static struct v4l2_subdev_pad_ops hsit_pad_ops = {
	166	.enum_mbus_code = hsit_enum_mbus_code,
	167	.enum_frame_size = hsit_enum_frame_size,
	168	.get_fmt = hsit_get_format,
	169	.set_fmt = hsit_set_format,
	170	};
	171
	172	static struct v4l2_subdev_ops hsit_ops = {
	173	.video = &hsit_video_ops,
	174	.pad = &hsit_pad_ops,
	175	};
	176
	177	/* -----------------------------------------------------------------------------
	178	* Initialization and Cleanup
	179	*/
	180
	181	struct vsp1_hsit vsp1_hsit_create(struct vsp1_device vsp1, bool inverse)
	182	{
	183	struct v4l2_subdev *subdev;
	184	struct vsp1_hsit *hsit;
	185	int ret;
	186
	187	hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
	188	if (hsit == NULL)
	189	return ERR_PTR(-ENOMEM);
	190
	191	hsit->inverse = inverse;
	192
d9b45ed3	193	if (inverse)
5cdf5741	194	hsit->entity.type = VSP1_ENTITY_HSI;
d9b45ed3	195	else
5cdf5741	196	hsit->entity.type = VSP1_ENTITY_HST;
5cdf5741 LP	197
	198	ret = vsp1_entity_init(vsp1, &hsit->entity, 2);
	199	if (ret < 0)
	200	return ERR_PTR(ret);
	201
	202	/* Initialize the V4L2 subdev. */
	203	subdev = &hsit->entity.subdev;
	204	v4l2_subdev_init(subdev, &hsit_ops);
	205
babca007	206	subdev->entity.ops = &vsp1->media_ops;
5cdf5741 LP	207	subdev->internal_ops = &vsp1_subdev_internal_ops;
	208	snprintf(subdev->name, sizeof(subdev->name), "%s %s",
	209	dev_name(vsp1->dev), inverse ? "hsi" : "hst");
	210	v4l2_set_subdevdata(subdev, hsit);
	211	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	212
	213	vsp1_entity_init_formats(subdev, NULL);
	214
	215	return hsit;
	216	}