[deliverable/linux.git] / drivers / media / platform / vsp1 / vsp1_uds.c

/*
 * vsp1_uds.c  --  R-Car VSP1 Up and Down Scaler
 *
 * 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 <linux/device.h>
#include <linux/gfp.h>

#include <media/v4l2-subdev.h>

#include "vsp1.h"
#include "vsp1_uds.h"

#define UDS_MIN_SIZE				4U
#define UDS_MAX_SIZE				8190U

#define UDS_MIN_FACTOR				0x0100
#define UDS_MAX_FACTOR				0xffff

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

static inline u32 vsp1_uds_read(struct vsp1_uds *uds, u32 reg)
{
	return vsp1_read(uds->entity.vsp1,
			 reg + uds->entity.index * VI6_UDS_OFFSET);
}

static inline void vsp1_uds_write(struct vsp1_uds *uds, u32 reg, u32 data)
{
	vsp1_write(uds->entity.vsp1,
		   reg + uds->entity.index * VI6_UDS_OFFSET, data);
}

/* -----------------------------------------------------------------------------
 * Scaling Computation
 */

void vsp1_uds_set_alpha(struct vsp1_uds *uds, unsigned int alpha)
{
	vsp1_uds_write(uds, VI6_UDS_ALPVAL, alpha << VI6_UDS_ALPVAL_VAL0_SHIFT);
}

/*
 * uds_output_size - Return the output size for an input size and scaling ratio
 * @input: input size in pixels
 * @ratio: scaling ratio in U4.12 fixed-point format
 */
static unsigned int uds_output_size(unsigned int input, unsigned int ratio)
{
	if (ratio > 4096) {
		/* Down-scaling */
		unsigned int mp;

		mp = ratio / 4096;
		mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);

		return (input - 1) / mp * mp * 4096 / ratio + 1;
	} else {
		/* Up-scaling */
		return (input - 1) * 4096 / ratio + 1;
	}
}

/*
 * uds_output_limits - Return the min and max output sizes for an input size
 * @input: input size in pixels
 * @minimum: minimum output size (returned)
 * @maximum: maximum output size (returned)
 */
static void uds_output_limits(unsigned int input,
			      unsigned int *minimum, unsigned int *maximum)
{
	*minimum = max(uds_output_size(input, UDS_MAX_FACTOR), UDS_MIN_SIZE);
	*maximum = min(uds_output_size(input, UDS_MIN_FACTOR), UDS_MAX_SIZE);
}

/*
 * uds_passband_width - Return the passband filter width for a scaling ratio
 * @ratio: scaling ratio in U4.12 fixed-point format
 */
static unsigned int uds_passband_width(unsigned int ratio)
{
	if (ratio >= 4096) {
		/* Down-scaling */
		unsigned int mp;

		mp = ratio / 4096;
		mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);

		return 64 * 4096 * mp / ratio;
	} else {
		/* Up-scaling */
		return 64;
	}
}

static unsigned int uds_compute_ratio(unsigned int input, unsigned int output)
{
	/* TODO: This is an approximation that will need to be refined. */
	return (input - 1) * 4096 / (output - 1);
}

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

static int uds_s_stream(struct v4l2_subdev *subdev, int enable)
{
	struct vsp1_uds *uds = to_uds(subdev);
	const struct v4l2_mbus_framefmt *output;
	const struct v4l2_mbus_framefmt *input;
	unsigned int hscale;
	unsigned int vscale;
	bool multitap;

	if (!enable)
		return 0;

	input = &uds->entity.formats[UDS_PAD_SINK];
	output = &uds->entity.formats[UDS_PAD_SOURCE];

	hscale = uds_compute_ratio(input->width, output->width);
	vscale = uds_compute_ratio(input->height, output->height);

	dev_dbg(uds->entity.vsp1->dev, "hscale %u vscale %u\n", hscale, vscale);

	/* Multi-tap scaling can't be enabled along with alpha scaling when
	 * scaling down with a factor lower than or equal to 1/2 in either
	 * direction.
	 */
	if (uds->scale_alpha && (hscale >= 8192 || vscale >= 8192))
		multitap = false;
	else
		multitap = true;

	vsp1_uds_write(uds, VI6_UDS_CTRL,
		       (uds->scale_alpha ? VI6_UDS_CTRL_AON : 0) |
		       (multitap ? VI6_UDS_CTRL_BC : 0));

	vsp1_uds_write(uds, VI6_UDS_PASS_BWIDTH,
		       (uds_passband_width(hscale)
				<< VI6_UDS_PASS_BWIDTH_H_SHIFT) |
		       (uds_passband_width(vscale)
				<< VI6_UDS_PASS_BWIDTH_V_SHIFT));

	/* Set the scaling ratios and the output size. */
	vsp1_uds_write(uds, VI6_UDS_SCALE,
		       (hscale << VI6_UDS_SCALE_HFRAC_SHIFT) |
		       (vscale << VI6_UDS_SCALE_VFRAC_SHIFT));
	vsp1_uds_write(uds, VI6_UDS_CLIP_SIZE,
		       (output->width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) |
		       (output->height << VI6_UDS_CLIP_SIZE_VSIZE_SHIFT));

	return 0;
}

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

static int uds_enum_mbus_code(struct v4l2_subdev *subdev,
			      struct v4l2_subdev_fh *fh,
			      struct v4l2_subdev_mbus_code_enum *code)
{
	static const unsigned int codes[] = {
		V4L2_MBUS_FMT_ARGB8888_1X32,
		V4L2_MBUS_FMT_AYUV8_1X32,
	};

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

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

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

		format = v4l2_subdev_get_try_format(fh, UDS_PAD_SINK);
		code->code = format->code;
	}

	return 0;
}

static int uds_enum_frame_size(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_fh *fh,
			       struct v4l2_subdev_frame_size_enum *fse)
{
	struct v4l2_mbus_framefmt *format;

	format = v4l2_subdev_get_try_format(fh, UDS_PAD_SINK);

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

	if (fse->pad == UDS_PAD_SINK) {
		fse->min_width = UDS_MIN_SIZE;
		fse->max_width = UDS_MAX_SIZE;
		fse->min_height = UDS_MIN_SIZE;
		fse->max_height = UDS_MAX_SIZE;
	} else {
		uds_output_limits(format->width, &fse->min_width,
				  &fse->max_width);
		uds_output_limits(format->height, &fse->min_height,
				  &fse->max_height);
	}

	return 0;
}

static int uds_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_uds *uds = to_uds(subdev);

	fmt->format = *vsp1_entity_get_pad_format(&uds->entity, fh, fmt->pad,
						  fmt->which);

	return 0;
}

static void uds_try_format(struct vsp1_uds *uds, struct v4l2_subdev_fh *fh,
			   unsigned int pad, struct v4l2_mbus_framefmt *fmt,
			   enum v4l2_subdev_format_whence which)
{
	struct v4l2_mbus_framefmt *format;
	unsigned int minimum;
	unsigned int maximum;

	switch (pad) {
	case UDS_PAD_SINK:
		/* Default to YUV if the requested format is not supported. */
		if (fmt->code != V4L2_MBUS_FMT_ARGB8888_1X32 &&
		    fmt->code != V4L2_MBUS_FMT_AYUV8_1X32)
			fmt->code = V4L2_MBUS_FMT_AYUV8_1X32;

		fmt->width = clamp(fmt->width, UDS_MIN_SIZE, UDS_MAX_SIZE);
		fmt->height = clamp(fmt->height, UDS_MIN_SIZE, UDS_MAX_SIZE);
		break;

	case UDS_PAD_SOURCE:
		/* The UDS scales but can't perform format conversion. */
		format = vsp1_entity_get_pad_format(&uds->entity, fh,
						    UDS_PAD_SINK, which);
		fmt->code = format->code;

		uds_output_limits(format->width, &minimum, &maximum);
		fmt->width = clamp(fmt->width, minimum, maximum);
		uds_output_limits(format->height, &minimum, &maximum);
		fmt->height = clamp(fmt->height, minimum, maximum);
		break;
	}

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

static int uds_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_uds *uds = to_uds(subdev);
	struct v4l2_mbus_framefmt *format;

	uds_try_format(uds, fh, fmt->pad, &fmt->format, fmt->which);

	format = vsp1_entity_get_pad_format(&uds->entity, fh, fmt->pad,
					    fmt->which);
	*format = fmt->format;

	if (fmt->pad == UDS_PAD_SINK) {
		/* Propagate the format to the source pad. */
		format = vsp1_entity_get_pad_format(&uds->entity, fh,
						    UDS_PAD_SOURCE, fmt->which);
		*format = fmt->format;

		uds_try_format(uds, fh, UDS_PAD_SOURCE, format, fmt->which);
	}

	return 0;
}

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

static struct v4l2_subdev_video_ops uds_video_ops = {
	.s_stream = uds_s_stream,
};

static struct v4l2_subdev_pad_ops uds_pad_ops = {
	.enum_mbus_code = uds_enum_mbus_code,
	.enum_frame_size = uds_enum_frame_size,
	.get_fmt = uds_get_format,
	.set_fmt = uds_set_format,
};

static struct v4l2_subdev_ops uds_ops = {
	.video	= &uds_video_ops,
	.pad    = &uds_pad_ops,
};

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

struct vsp1_uds *vsp1_uds_create(struct vsp1_device *vsp1, unsigned int index)
{
	struct v4l2_subdev *subdev;
	struct vsp1_uds *uds;
	int ret;

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

	uds->entity.type = VSP1_ENTITY_UDS;
	uds->entity.index = index;

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

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

	subdev->entity.ops = &vsp1_media_ops;
	subdev->internal_ops = &vsp1_subdev_internal_ops;
	snprintf(subdev->name, sizeof(subdev->name), "%s uds.%u",
		 dev_name(vsp1->dev), index);
	v4l2_set_subdevdata(subdev, uds);
	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

	vsp1_entity_init_formats(subdev, NULL);

	return uds;
}
Commit	Line	Data
26e0ca22 LP	1	/*
	2	* vsp1_uds.c -- R-Car VSP1 Up and Down Scaler
	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 <linux/device.h>
	15	#include <linux/gfp.h>
	16
	17	#include <media/v4l2-subdev.h>
	18
	19	#include "vsp1.h"
	20	#include "vsp1_uds.h"
	21
	22	#define UDS_MIN_SIZE 4U
	23	#define UDS_MAX_SIZE 8190U
	24
	25	#define UDS_MIN_FACTOR 0x0100
	26	#define UDS_MAX_FACTOR 0xffff
	27
	28	/* -----------------------------------------------------------------------------
	29	* Device Access
	30	*/
	31
	32	static inline u32 vsp1_uds_read(struct vsp1_uds *uds, u32 reg)
	33	{
	34	return vsp1_read(uds->entity.vsp1,
	35	reg + uds->entity.index * VI6_UDS_OFFSET);
	36	}
	37
	38	static inline void vsp1_uds_write(struct vsp1_uds *uds, u32 reg, u32 data)
	39	{
	40	vsp1_write(uds->entity.vsp1,
	41	reg + uds->entity.index * VI6_UDS_OFFSET, data);
	42	}
	43
	44	/* -----------------------------------------------------------------------------
	45	* Scaling Computation
	46	*/
	47
bdc2df62 LP	48	void vsp1_uds_set_alpha(struct vsp1_uds *uds, unsigned int alpha)
	49	{
	50	vsp1_uds_write(uds, VI6_UDS_ALPVAL, alpha << VI6_UDS_ALPVAL_VAL0_SHIFT);
	51	}
	52
26e0ca22 LP	53	/*
	54	* uds_output_size - Return the output size for an input size and scaling ratio
	55	* @input: input size in pixels
	56	* @ratio: scaling ratio in U4.12 fixed-point format
	57	*/
	58	static unsigned int uds_output_size(unsigned int input, unsigned int ratio)
	59	{
	60	if (ratio > 4096) {
	61	/* Down-scaling */
	62	unsigned int mp;
	63
	64	mp = ratio / 4096;
	65	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	66
	67	return (input - 1) / mp * mp * 4096 / ratio + 1;
	68	} else {
	69	/* Up-scaling */
	70	return (input - 1) * 4096 / ratio + 1;
	71	}
	72	}
	73
	74	/*
	75	* uds_output_limits - Return the min and max output sizes for an input size
	76	* @input: input size in pixels
	77	* @minimum: minimum output size (returned)
	78	* @maximum: maximum output size (returned)
	79	*/
	80	static void uds_output_limits(unsigned int input,
	81	unsigned int minimum, unsigned int maximum)
	82	{
	83	*minimum = max(uds_output_size(input, UDS_MAX_FACTOR), UDS_MIN_SIZE);
	84	*maximum = min(uds_output_size(input, UDS_MIN_FACTOR), UDS_MAX_SIZE);
	85	}
	86
	87	/*
	88	* uds_passband_width - Return the passband filter width for a scaling ratio
	89	* @ratio: scaling ratio in U4.12 fixed-point format
	90	*/
	91	static unsigned int uds_passband_width(unsigned int ratio)
	92	{
	93	if (ratio >= 4096) {
	94	/* Down-scaling */
	95	unsigned int mp;
	96
	97	mp = ratio / 4096;
	98	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	99
	100	return 64 * 4096 * mp / ratio;
	101	} else {
	102	/* Up-scaling */
	103	return 64;
	104	}
	105	}
	106
	107	static unsigned int uds_compute_ratio(unsigned int input, unsigned int output)
	108	{
	109	/* TODO: This is an approximation that will need to be refined. */
	110	return (input - 1) * 4096 / (output - 1);
	111	}
	112
26e0ca22 LP	113	/* -----------------------------------------------------------------------------
	114	* V4L2 Subdevice Core Operations
	115	*/
	116
	117	static int uds_s_stream(struct v4l2_subdev *subdev, int enable)
	118	{
26e0ca22	119	struct vsp1_uds *uds = to_uds(subdev);
bdc2df62 LP	120	const struct v4l2_mbus_framefmt *output;
	121	const struct v4l2_mbus_framefmt *input;
	122	unsigned int hscale;
	123	unsigned int vscale;
	124	bool multitap;
26e0ca22 LP	125
	126	if (!enable)
	127	return 0;
	128
bdc2df62 LP	129	input = &uds->entity.formats[UDS_PAD_SINK];
	130	output = &uds->entity.formats[UDS_PAD_SOURCE];
	131
	132	hscale = uds_compute_ratio(input->width, output->width);
	133	vscale = uds_compute_ratio(input->height, output->height);
	134
	135	dev_dbg(uds->entity.vsp1->dev, "hscale %u vscale %u\n", hscale, vscale);
	136
	137	/* Multi-tap scaling can't be enabled along with alpha scaling when
	138	* scaling down with a factor lower than or equal to 1/2 in either
	139	* direction.
	140	*/
	141	if (uds->scale_alpha && (hscale >= 8192 \|\| vscale >= 8192))
	142	multitap = false;
	143	else
	144	multitap = true;
	145
	146	vsp1_uds_write(uds, VI6_UDS_CTRL,
	147	(uds->scale_alpha ? VI6_UDS_CTRL_AON : 0) \|
	148	(multitap ? VI6_UDS_CTRL_BC : 0));
26e0ca22 LP	149
26e0ca22 LP	150	vsp1_uds_write(uds, VI6_UDS_PASS_BWIDTH,
bdc2df62	151	(uds_passband_width(hscale)
26e0ca22	152	<< VI6_UDS_PASS_BWIDTH_H_SHIFT) \|
bdc2df62	153	(uds_passband_width(vscale)
26e0ca22 LP	154	<< VI6_UDS_PASS_BWIDTH_V_SHIFT));
26e0ca22 LP	155
26e0ca22	156	/* Set the scaling ratios and the output size. */
26e0ca22	157	vsp1_uds_write(uds, VI6_UDS_SCALE,
bdc2df62 LP	158	(hscale << VI6_UDS_SCALE_HFRAC_SHIFT) \|
bdc2df62 LP	159	(vscale << VI6_UDS_SCALE_VFRAC_SHIFT));
26e0ca22	160	vsp1_uds_write(uds, VI6_UDS_CLIP_SIZE,
bdc2df62 LP	161	(output->width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) \|
bdc2df62 LP	162	(output->height << VI6_UDS_CLIP_SIZE_VSIZE_SHIFT));
26e0ca22 LP	163
	164	return 0;
	165	}
	166
	167	/* -----------------------------------------------------------------------------
	168	* V4L2 Subdevice Pad Operations
	169	*/
	170
	171	static int uds_enum_mbus_code(struct v4l2_subdev *subdev,
	172	struct v4l2_subdev_fh *fh,
	173	struct v4l2_subdev_mbus_code_enum *code)
	174	{
	175	static const unsigned int codes[] = {
	176	V4L2_MBUS_FMT_ARGB8888_1X32,
	177	V4L2_MBUS_FMT_AYUV8_1X32,
	178	};
	179
	180	if (code->pad == UDS_PAD_SINK) {
	181	if (code->index >= ARRAY_SIZE(codes))
	182	return -EINVAL;
	183
	184	code->code = codes[code->index];
	185	} else {
	186	struct v4l2_mbus_framefmt *format;
	187
	188	/* The UDS can't perform format conversion, the sink format is
	189	* always identical to the source format.
	190	*/
	191	if (code->index)
	192	return -EINVAL;
	193
	194	format = v4l2_subdev_get_try_format(fh, UDS_PAD_SINK);
	195	code->code = format->code;
	196	}
	197
	198	return 0;
	199	}
	200
	201	static int uds_enum_frame_size(struct v4l2_subdev *subdev,
	202	struct v4l2_subdev_fh *fh,
	203	struct v4l2_subdev_frame_size_enum *fse)
	204	{
	205	struct v4l2_mbus_framefmt *format;
	206
	207	format = v4l2_subdev_get_try_format(fh, UDS_PAD_SINK);
	208
	209	if (fse->index \|\| fse->code != format->code)
	210	return -EINVAL;
	211
	212	if (fse->pad == UDS_PAD_SINK) {
	213	fse->min_width = UDS_MIN_SIZE;
	214	fse->max_width = UDS_MAX_SIZE;
	215	fse->min_height = UDS_MIN_SIZE;
	216	fse->max_height = UDS_MAX_SIZE;
	217	} else {
	218	uds_output_limits(format->width, &fse->min_width,
	219	&fse->max_width);
	220	uds_output_limits(format->height, &fse->min_height,
	221	&fse->max_height);
	222	}
	223
	224	return 0;
	225	}
	226
227	static int uds_get_format(struct v4l2_subdev subdev, struct v4l2_subdev_fh fh,
228	struct v4l2_subdev_format *fmt)
229	{
230	struct vsp1_uds *uds = to_uds(subdev);
231
232	fmt->format = *vsp1_entity_get_pad_format(&uds->entity, fh, fmt->pad,
233	fmt->which);
234
235	return 0;
236	}
237
238	static void uds_try_format(struct vsp1_uds uds, struct v4l2_subdev_fh fh,
239	unsigned int pad, struct v4l2_mbus_framefmt *fmt,
240	enum v4l2_subdev_format_whence which)
241	{
242	struct v4l2_mbus_framefmt *format;
243	unsigned int minimum;
244	unsigned int maximum;
245
246	switch (pad) {
247	case UDS_PAD_SINK:
248	/* Default to YUV if the requested format is not supported. */
249	if (fmt->code != V4L2_MBUS_FMT_ARGB8888_1X32 &&
250	fmt->code != V4L2_MBUS_FMT_AYUV8_1X32)
251	fmt->code = V4L2_MBUS_FMT_AYUV8_1X32;
252
253	fmt->width = clamp(fmt->width, UDS_MIN_SIZE, UDS_MAX_SIZE);
254	fmt->height = clamp(fmt->height, UDS_MIN_SIZE, UDS_MAX_SIZE);
255	break;
256
257	case UDS_PAD_SOURCE:
258	/* The UDS scales but can't perform format conversion. */
259	format = vsp1_entity_get_pad_format(&uds->entity, fh,
260	UDS_PAD_SINK, which);
261	fmt->code = format->code;
262
263	uds_output_limits(format->width, &minimum, &maximum);
264	fmt->width = clamp(fmt->width, minimum, maximum);
265	uds_output_limits(format->height, &minimum, &maximum);
266	fmt->height = clamp(fmt->height, minimum, maximum);
267	break;
268	}
269
270	fmt->field = V4L2_FIELD_NONE;
271	fmt->colorspace = V4L2_COLORSPACE_SRGB;
272	}
273
274	static int uds_set_format(struct v4l2_subdev subdev, struct v4l2_subdev_fh fh,
275	struct v4l2_subdev_format *fmt)
276	{
277	struct vsp1_uds *uds = to_uds(subdev);
278	struct v4l2_mbus_framefmt *format;
279
280	uds_try_format(uds, fh, fmt->pad, &fmt->format, fmt->which);
281
282	format = vsp1_entity_get_pad_format(&uds->entity, fh, fmt->pad,
283	fmt->which);
284	*format = fmt->format;
285
286	if (fmt->pad == UDS_PAD_SINK) {
287	/* Propagate the format to the source pad. */
288	format = vsp1_entity_get_pad_format(&uds->entity, fh,
289	UDS_PAD_SOURCE, fmt->which);
290	*format = fmt->format;
291
292	uds_try_format(uds, fh, UDS_PAD_SOURCE, format, fmt->which);
293	}
294
26e0ca22 LP	295	return 0;
	296	}
	297
	298	/* -----------------------------------------------------------------------------
	299	* V4L2 Subdevice Operations
	300	*/
	301
	302	static struct v4l2_subdev_video_ops uds_video_ops = {
	303	.s_stream = uds_s_stream,
	304	};
	305
	306	static struct v4l2_subdev_pad_ops uds_pad_ops = {
	307	.enum_mbus_code = uds_enum_mbus_code,
	308	.enum_frame_size = uds_enum_frame_size,
	309	.get_fmt = uds_get_format,
	310	.set_fmt = uds_set_format,
	311	};
	312
	313	static struct v4l2_subdev_ops uds_ops = {
	314	.video = &uds_video_ops,
	315	.pad = &uds_pad_ops,
	316	};
	317
	318	/* -----------------------------------------------------------------------------
	319	* Initialization and Cleanup
	320	*/
	321
	322	struct vsp1_uds vsp1_uds_create(struct vsp1_device vsp1, unsigned int index)
	323	{
	324	struct v4l2_subdev *subdev;
	325	struct vsp1_uds *uds;
	326	int ret;
	327
	328	uds = devm_kzalloc(vsp1->dev, sizeof(*uds), GFP_KERNEL);
	329	if (uds == NULL)
	330	return ERR_PTR(-ENOMEM);
	331
	332	uds->entity.type = VSP1_ENTITY_UDS;
	333	uds->entity.index = index;
26e0ca22 LP	334
	335	ret = vsp1_entity_init(vsp1, &uds->entity, 2);
	336	if (ret < 0)
	337	return ERR_PTR(ret);
	338
	339	/* Initialize the V4L2 subdev. */
	340	subdev = &uds->entity.subdev;
	341	v4l2_subdev_init(subdev, &uds_ops);
	342
	343	subdev->entity.ops = &vsp1_media_ops;
	344	subdev->internal_ops = &vsp1_subdev_internal_ops;
	345	snprintf(subdev->name, sizeof(subdev->name), "%s uds.%u",
	346	dev_name(vsp1->dev), index);
	347	v4l2_set_subdevdata(subdev, uds);
	348	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	349
	350	vsp1_entity_init_formats(subdev, NULL);
	351
	352	return uds;
	353	}