[deliverable/linux.git] / drivers / media / platform / vsp1 / vsp1_sru.c

/*
 * vsp1_sru.c  --  R-Car VSP1 Super Resolution Unit
 *
 * 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_sru.h"

#define SRU_MIN_SIZE				4U
#define SRU_MAX_SIZE				8190U

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

static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
{
	vsp1_mod_write(&sru->entity, reg, data);
}

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

#define V4L2_CID_VSP1_SRU_INTENSITY		(V4L2_CID_USER_BASE + 1)

struct vsp1_sru_param {
	u32 ctrl0;
	u32 ctrl2;
};

#define VI6_SRU_CTRL0_PARAMS(p0, p1)			\
	(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) |		\
	 ((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))

#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8)		\
	(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) |		\
	 ((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) |		\
	 ((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))

static const struct vsp1_sru_param vsp1_sru_params[] = {
	{
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
	}, {
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
	}, {
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
	}, {
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
	}, {
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
	}, {
		.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) | VI6_SRU_CTRL0_EN,
		.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
	},
};

static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct vsp1_sru *sru =
		container_of(ctrl->handler, struct vsp1_sru, ctrls);

	switch (ctrl->id) {
	case V4L2_CID_VSP1_SRU_INTENSITY:
		sru->intensity = ctrl->val;
		break;
	}

	return 0;
}

static const struct v4l2_ctrl_ops sru_ctrl_ops = {
	.s_ctrl = sru_s_ctrl,
};

static const struct v4l2_ctrl_config sru_intensity_control = {
	.ops = &sru_ctrl_ops,
	.id = V4L2_CID_VSP1_SRU_INTENSITY,
	.name = "Intensity",
	.type = V4L2_CTRL_TYPE_INTEGER,
	.min = 1,
	.max = 6,
	.def = 1,
	.step = 1,
};

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

static int sru_s_stream(struct v4l2_subdev *subdev, int enable)
{
	const struct vsp1_sru_param *param;
	struct vsp1_sru *sru = to_sru(subdev);
	struct v4l2_mbus_framefmt *input;
	struct v4l2_mbus_framefmt *output;
	u32 ctrl0;

	if (!enable)
		return 0;

	input = &sru->entity.formats[SRU_PAD_SINK];
	output = &sru->entity.formats[SRU_PAD_SOURCE];

	if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
		ctrl0 = VI6_SRU_CTRL0_PARAM2 | VI6_SRU_CTRL0_PARAM3
		      | VI6_SRU_CTRL0_PARAM4;
	else
		ctrl0 = VI6_SRU_CTRL0_PARAM3;

	if (input->width != output->width)
		ctrl0 |= VI6_SRU_CTRL0_MODE_UPSCALE;

	param = &vsp1_sru_params[sru->intensity - 1];

	ctrl0 |= param->ctrl0;

	vsp1_sru_write(sru, VI6_SRU_CTRL0, ctrl0);
	vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
	vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);

	return 0;
}

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

static int sru_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,
	};
	struct vsp1_sru *sru = to_sru(subdev);
	struct v4l2_mbus_framefmt *format;

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

		code->code = codes[code->index];
	} else {
		/* The SRU 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(&sru->entity, cfg,
						    SRU_PAD_SINK, code->which);
		code->code = format->code;
	}

	return 0;
}

static int sru_enum_frame_size(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_pad_config *cfg,
			       struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_sru *sru = to_sru(subdev);
	struct v4l2_mbus_framefmt *format;

	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
					    SRU_PAD_SINK, fse->which);

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

	if (fse->pad == SRU_PAD_SINK) {
		fse->min_width = SRU_MIN_SIZE;
		fse->max_width = SRU_MAX_SIZE;
		fse->min_height = SRU_MIN_SIZE;
		fse->max_height = SRU_MAX_SIZE;
	} else {
		fse->min_width = format->width;
		fse->min_height = format->height;
		if (format->width <= SRU_MAX_SIZE / 2 &&
		    format->height <= SRU_MAX_SIZE / 2) {
			fse->max_width = format->width * 2;
			fse->max_height = format->height * 2;
		} else {
			fse->max_width = format->width;
			fse->max_height = format->height;
		}
	}

	return 0;
}

static int sru_get_format(struct v4l2_subdev *subdev,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_sru *sru = to_sru(subdev);

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

	return 0;
}

static void sru_try_format(struct vsp1_sru *sru,
			   struct v4l2_subdev_pad_config *cfg,
			   unsigned int pad, struct v4l2_mbus_framefmt *fmt,
			   enum v4l2_subdev_format_whence which)
{
	struct v4l2_mbus_framefmt *format;
	unsigned int input_area;
	unsigned int output_area;

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

		fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
		fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
		break;

	case SRU_PAD_SOURCE:
		/* The SRU can't perform format conversion. */
		format = vsp1_entity_get_pad_format(&sru->entity, cfg,
						    SRU_PAD_SINK, which);
		fmt->code = format->code;

		/* We can upscale by 2 in both direction, but not independently.
		 * Compare the input and output rectangles areas (avoiding
		 * integer overflows on the output): if the requested output
		 * area is larger than 1.5^2 the input area upscale by two,
		 * otherwise don't scale.
		 */
		input_area = format->width * format->height;
		output_area = min(fmt->width, SRU_MAX_SIZE)
			    * min(fmt->height, SRU_MAX_SIZE);

		if (fmt->width <= SRU_MAX_SIZE / 2 &&
		    fmt->height <= SRU_MAX_SIZE / 2 &&
		    output_area > input_area * 9 / 4) {
			fmt->width = format->width * 2;
			fmt->height = format->height * 2;
		} else {
			fmt->width = format->width;
			fmt->height = format->height;
		}
		break;
	}

	fmt->field = V4L2_FIELD_NONE;
	fmt->colorspace = V4L2_COLORSPACE_SRGB;
}

static int sru_set_format(struct v4l2_subdev *subdev,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_sru *sru = to_sru(subdev);
	struct v4l2_mbus_framefmt *format;

	sru_try_format(sru, cfg, fmt->pad, &fmt->format, fmt->which);

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

	if (fmt->pad == SRU_PAD_SINK) {
		/* Propagate the format to the source pad. */
		format = vsp1_entity_get_pad_format(&sru->entity, cfg,
						    SRU_PAD_SOURCE, fmt->which);
		*format = fmt->format;

		sru_try_format(sru, cfg, SRU_PAD_SOURCE, format, fmt->which);
	}

	return 0;
}

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

static struct v4l2_subdev_video_ops sru_video_ops = {
	.s_stream = sru_s_stream,
};

static struct v4l2_subdev_pad_ops sru_pad_ops = {
	.enum_mbus_code = sru_enum_mbus_code,
	.enum_frame_size = sru_enum_frame_size,
	.get_fmt = sru_get_format,
	.set_fmt = sru_set_format,
};

static struct v4l2_subdev_ops sru_ops = {
	.video	= &sru_video_ops,
	.pad    = &sru_pad_ops,
};

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

struct vsp1_sru *vsp1_sru_create(struct vsp1_device *vsp1)
{
	struct vsp1_sru *sru;
	int ret;

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

	sru->entity.type = VSP1_ENTITY_SRU;

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

	/* Initialize the control handler. */
	v4l2_ctrl_handler_init(&sru->ctrls, 1);
	v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);

	sru->intensity = 1;

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

	if (sru->ctrls.error) {
		dev_err(vsp1->dev, "sru: failed to initialize controls\n");
		ret = sru->ctrls.error;
		vsp1_entity_destroy(&sru->entity);
		return ERR_PTR(ret);
	}

	return sru;
}
Commit	Line	Data
a626e64e LP	1	/*
	2	* vsp1_sru.c -- R-Car VSP1 Super Resolution Unit
	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_sru.h"
	21
	22	#define SRU_MIN_SIZE 4U
	23	#define SRU_MAX_SIZE 8190U
	24
	25	/* -----------------------------------------------------------------------------
	26	* Device Access
	27	*/
	28
a626e64e LP	29	static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
a626e64e LP	30	{
773abafe	31	vsp1_mod_write(&sru->entity, reg, data);
a626e64e LP	32	}
	33
	34	/* -----------------------------------------------------------------------------
	35	* Controls
	36	*/
	37
	38	#define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE + 1)
	39
a626e64e LP	40	struct vsp1_sru_param {
	41	u32 ctrl0;
	42	u32 ctrl2;
	43	};
	44
	45	#define VI6_SRU_CTRL0_PARAMS(p0, p1) \
	46	(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) \| \
	47	((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
	48
	49	#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
	50	(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) \| \
	51	((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) \| \
	52	((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
	53
	54	static const struct vsp1_sru_param vsp1_sru_params[] = {
	55	{
	56	.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) \| VI6_SRU_CTRL0_EN,
	57	.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
	58	}, {
	59	.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) \| VI6_SRU_CTRL0_EN,
	60	.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
	61	}, {
	62	.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) \| VI6_SRU_CTRL0_EN,
	63	.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
	64	}, {
	65	.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) \| VI6_SRU_CTRL0_EN,
	66	.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
	67	}, {
	68	.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) \| VI6_SRU_CTRL0_EN,
	69	.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
	70	}, {
	71	.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) \| VI6_SRU_CTRL0_EN,
	72	.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
	73	},
	74	};
	75
58f896d8 LP	76	static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
	77	{
	78	struct vsp1_sru *sru =
	79	container_of(ctrl->handler, struct vsp1_sru, ctrls);
58f896d8 LP	80
	81	switch (ctrl->id) {
	82	case V4L2_CID_VSP1_SRU_INTENSITY:
d884a8b2	83	sru->intensity = ctrl->val;
58f896d8 LP	84	break;
	85	}
	86
	87	return 0;
	88	}
	89
	90	static const struct v4l2_ctrl_ops sru_ctrl_ops = {
	91	.s_ctrl = sru_s_ctrl,
	92	};
	93
	94	static const struct v4l2_ctrl_config sru_intensity_control = {
	95	.ops = &sru_ctrl_ops,
	96	.id = V4L2_CID_VSP1_SRU_INTENSITY,
	97	.name = "Intensity",
	98	.type = V4L2_CTRL_TYPE_INTEGER,
	99	.min = 1,
	100	.max = 6,
	101	.def = 1,
	102	.step = 1,
	103	};
	104
	105	/* -----------------------------------------------------------------------------
	106	* V4L2 Subdevice Core Operations
	107	*/
	108
a626e64e LP	109	static int sru_s_stream(struct v4l2_subdev *subdev, int enable)
a626e64e LP	110	{
d884a8b2	111	const struct vsp1_sru_param *param;
a626e64e	112	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	113	struct v4l2_mbus_framefmt *input;
a626e64e LP	114	struct v4l2_mbus_framefmt *output;
a626e64e	115	u32 ctrl0;
58f896d8	116
a626e64e LP	117	if (!enable)
	118	return 0;
	119
	120	input = &sru->entity.formats[SRU_PAD_SINK];
	121	output = &sru->entity.formats[SRU_PAD_SOURCE];
a626e64e	122
27ffaeb0	123	if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
a626e64e LP	124	ctrl0 = VI6_SRU_CTRL0_PARAM2 \| VI6_SRU_CTRL0_PARAM3
	125	\| VI6_SRU_CTRL0_PARAM4;
	126	else
	127	ctrl0 = VI6_SRU_CTRL0_PARAM3;
	128
58f896d8 LP	129	if (input->width != output->width)
	130	ctrl0 \|= VI6_SRU_CTRL0_MODE_UPSCALE;
	131
d884a8b2 LP	132	param = &vsp1_sru_params[sru->intensity - 1];
	133
	134	ctrl0 \|= param->ctrl0;
58f896d8	135
d884a8b2	136	vsp1_sru_write(sru, VI6_SRU_CTRL0, ctrl0);
a626e64e	137	vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
d884a8b2	138	vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);
a626e64e LP	139
	140	return 0;
	141	}
	142
	143	/* -----------------------------------------------------------------------------
	144	* V4L2 Subdevice Pad Operations
	145	*/
	146
	147	static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	148	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	149	struct v4l2_subdev_mbus_code_enum *code)
	150	{
	151	static const unsigned int codes[] = {
27ffaeb0 BB	152	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	153	MEDIA_BUS_FMT_AYUV8_1X32,
a626e64e	154	};
3f1ccf16	155	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	156	struct v4l2_mbus_framefmt *format;
	157
	158	if (code->pad == SRU_PAD_SINK) {
	159	if (code->index >= ARRAY_SIZE(codes))
	160	return -EINVAL;
	161
	162	code->code = codes[code->index];
	163	} else {
	164	/* The SRU can't perform format conversion, the sink format is
	165	* always identical to the source format.
	166	*/
	167	if (code->index)
	168	return -EINVAL;
	169
3f1ccf16 HV	170	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
3f1ccf16 HV	171	SRU_PAD_SINK, code->which);
a626e64e LP	172	code->code = format->code;
	173	}
	174
	175	return 0;
	176	}
	177
	178	static int sru_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	179	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	180	struct v4l2_subdev_frame_size_enum *fse)
a626e64e LP	181	{
5778e749	182	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	183	struct v4l2_mbus_framefmt *format;
a626e64e LP	184
5778e749 HV	185	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
5778e749 HV	186	SRU_PAD_SINK, fse->which);
a626e64e LP	187
	188	if (fse->index \|\| fse->code != format->code)
	189	return -EINVAL;
	190
	191	if (fse->pad == SRU_PAD_SINK) {
	192	fse->min_width = SRU_MIN_SIZE;
	193	fse->max_width = SRU_MAX_SIZE;
	194	fse->min_height = SRU_MIN_SIZE;
	195	fse->max_height = SRU_MAX_SIZE;
	196	} else {
	197	fse->min_width = format->width;
	198	fse->min_height = format->height;
	199	if (format->width <= SRU_MAX_SIZE / 2 &&
	200	format->height <= SRU_MAX_SIZE / 2) {
	201	fse->max_width = format->width * 2;
	202	fse->max_height = format->height * 2;
	203	} else {
	204	fse->max_width = format->width;
	205	fse->max_height = format->height;
	206	}
	207	}
	208
	209	return 0;
	210	}
	211
1bd0a1bd LP	212	static int sru_get_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	213	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	214	struct v4l2_subdev_format *fmt)
	215	{
	216	struct vsp1_sru *sru = to_sru(subdev);
	217
f7234138	218	fmt->format = *vsp1_entity_get_pad_format(&sru->entity, cfg, fmt->pad,
a626e64e LP	219	fmt->which);
	220
	221	return 0;
	222	}
	223
1bd0a1bd LP	224	static void sru_try_format(struct vsp1_sru *sru,
1bd0a1bd LP	225	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	226	unsigned int pad, struct v4l2_mbus_framefmt *fmt,
	227	enum v4l2_subdev_format_whence which)
	228	{
	229	struct v4l2_mbus_framefmt *format;
	230	unsigned int input_area;
	231	unsigned int output_area;
	232
	233	switch (pad) {
	234	case SRU_PAD_SINK:
	235	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	236	if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	237	fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
	238	fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
a626e64e LP	239
	240	fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
	241	fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
	242	break;
	243
	244	case SRU_PAD_SOURCE:
	245	/* The SRU can't perform format conversion. */
f7234138	246	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
a626e64e LP	247	SRU_PAD_SINK, which);
	248	fmt->code = format->code;
	249
	250	/* We can upscale by 2 in both direction, but not independently.
	251	* Compare the input and output rectangles areas (avoiding
	252	* integer overflows on the output): if the requested output
	253	* area is larger than 1.5^2 the input area upscale by two,
	254	* otherwise don't scale.
	255	*/
	256	input_area = format->width * format->height;
	257	output_area = min(fmt->width, SRU_MAX_SIZE)
	258	* min(fmt->height, SRU_MAX_SIZE);
	259
	260	if (fmt->width <= SRU_MAX_SIZE / 2 &&
	261	fmt->height <= SRU_MAX_SIZE / 2 &&
	262	output_area > input_area * 9 / 4) {
	263	fmt->width = format->width * 2;
	264	fmt->height = format->height * 2;
	265	} else {
	266	fmt->width = format->width;
	267	fmt->height = format->height;
	268	}
	269	break;
	270	}
	271
	272	fmt->field = V4L2_FIELD_NONE;
	273	fmt->colorspace = V4L2_COLORSPACE_SRGB;
	274	}
	275
1bd0a1bd LP	276	static int sru_set_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	277	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	278	struct v4l2_subdev_format *fmt)
	279	{
	280	struct vsp1_sru *sru = to_sru(subdev);
	281	struct v4l2_mbus_framefmt *format;
	282
f7234138	283	sru_try_format(sru, cfg, fmt->pad, &fmt->format, fmt->which);
a626e64e	284
f7234138	285	format = vsp1_entity_get_pad_format(&sru->entity, cfg, fmt->pad,
a626e64e LP	286	fmt->which);
	287	*format = fmt->format;
	288
	289	if (fmt->pad == SRU_PAD_SINK) {
	290	/* Propagate the format to the source pad. */
f7234138	291	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
a626e64e LP	292	SRU_PAD_SOURCE, fmt->which);
	293	*format = fmt->format;
	294
f7234138	295	sru_try_format(sru, cfg, SRU_PAD_SOURCE, format, fmt->which);
a626e64e LP	296	}
	297
	298	return 0;
	299	}
	300
	301	/* -----------------------------------------------------------------------------
	302	* V4L2 Subdevice Operations
	303	*/
	304
	305	static struct v4l2_subdev_video_ops sru_video_ops = {
	306	.s_stream = sru_s_stream,
	307	};
	308
	309	static struct v4l2_subdev_pad_ops sru_pad_ops = {
	310	.enum_mbus_code = sru_enum_mbus_code,
	311	.enum_frame_size = sru_enum_frame_size,
	312	.get_fmt = sru_get_format,
	313	.set_fmt = sru_set_format,
	314	};
	315
	316	static struct v4l2_subdev_ops sru_ops = {
	317	.video = &sru_video_ops,
	318	.pad = &sru_pad_ops,
	319	};
	320
	321	/* -----------------------------------------------------------------------------
	322	* Initialization and Cleanup
	323	*/
	324
	325	struct vsp1_sru vsp1_sru_create(struct vsp1_device vsp1)
	326	{
a626e64e LP	327	struct vsp1_sru *sru;
	328	int ret;
	329
	330	sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
	331	if (sru == NULL)
	332	return ERR_PTR(-ENOMEM);
	333
	334	sru->entity.type = VSP1_ENTITY_SRU;
a626e64e	335
823329df	336	ret = vsp1_entity_init(vsp1, &sru->entity, "sru", 2, &sru_ops);
a626e64e LP	337	if (ret < 0)
	338	return ERR_PTR(ret);
	339
a626e64e LP	340	/* Initialize the control handler. */
	341	v4l2_ctrl_handler_init(&sru->ctrls, 1);
	342	v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
a1606102	343
d884a8b2 LP	344	sru->intensity = 1;
d884a8b2 LP	345
a626e64e LP	346	sru->entity.subdev.ctrl_handler = &sru->ctrls;
a626e64e LP	347
a1606102 LP	348	if (sru->ctrls.error) {
	349	dev_err(vsp1->dev, "sru: failed to initialize controls\n");
	350	ret = sru->ctrls.error;
	351	vsp1_entity_destroy(&sru->entity);
	352	return ERR_PTR(ret);
	353	}
	354
a626e64e LP	355	return sru;
a626e64e LP	356	}