[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 void vsp1_uds_write(struct vsp1_uds *uds, u32 reg, u32 data)
{
	vsp1_mod_write(&uds->entity, 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 = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
					   UDS_PAD_SINK);
	output = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
					    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_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_uds *uds = to_uds(subdev);

	if (code->pad == UDS_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;

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

		/* The UDS 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(&uds->entity, config,
						    UDS_PAD_SINK);
		code->code = format->code;
	}

	return 0;
}

static int uds_enum_frame_size(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_pad_config *cfg,
			       struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_uds *uds = to_uds(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

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

	format = vsp1_entity_get_pad_format(&uds->entity, config,
					    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_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_uds *uds = to_uds(subdev);
	struct v4l2_subdev_pad_config *config;

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

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

	return 0;
}

static void uds_try_format(struct vsp1_uds *uds,
			   struct v4l2_subdev_pad_config *config,
			   unsigned int pad, struct v4l2_mbus_framefmt *fmt)
{
	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 != MEDIA_BUS_FMT_ARGB8888_1X32 &&
		    fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
			fmt->code = MEDIA_BUS_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, config,
						    UDS_PAD_SINK);
		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_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_uds *uds = to_uds(subdev);
	struct v4l2_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

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

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

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

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

		uds_try_format(uds, config, UDS_PAD_SOURCE, format);
	}

	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 = {
	.init_cfg = vsp1_entity_init_cfg,
	.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 vsp1_uds *uds;
	char name[6];
	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;

	sprintf(name, "uds.%u", index);
	ret = vsp1_entity_init(vsp1, &uds->entity, name, 2, &uds_ops);
	if (ret < 0)
		return ERR_PTR(ret);

	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
26e0ca22 LP	32	static inline void vsp1_uds_write(struct vsp1_uds *uds, u32 reg, u32 data)
26e0ca22 LP	33	{
773abafe LP	34	vsp1_mod_write(&uds->entity, reg + uds->entity.index * VI6_UDS_OFFSET,
773abafe LP	35	data);
26e0ca22 LP	36	}
	37
	38	/* -----------------------------------------------------------------------------
	39	* Scaling Computation
	40	*/
	41
bdc2df62 LP	42	void vsp1_uds_set_alpha(struct vsp1_uds *uds, unsigned int alpha)
	43	{
	44	vsp1_uds_write(uds, VI6_UDS_ALPVAL, alpha << VI6_UDS_ALPVAL_VAL0_SHIFT);
	45	}
	46
26e0ca22 LP	47	/*
	48	* uds_output_size - Return the output size for an input size and scaling ratio
	49	* @input: input size in pixels
	50	* @ratio: scaling ratio in U4.12 fixed-point format
	51	*/
	52	static unsigned int uds_output_size(unsigned int input, unsigned int ratio)
	53	{
	54	if (ratio > 4096) {
	55	/* Down-scaling */
	56	unsigned int mp;
	57
	58	mp = ratio / 4096;
	59	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	60
	61	return (input - 1) / mp * mp * 4096 / ratio + 1;
	62	} else {
	63	/* Up-scaling */
	64	return (input - 1) * 4096 / ratio + 1;
	65	}
	66	}
	67
	68	/*
	69	* uds_output_limits - Return the min and max output sizes for an input size
	70	* @input: input size in pixels
	71	* @minimum: minimum output size (returned)
	72	* @maximum: maximum output size (returned)
	73	*/
	74	static void uds_output_limits(unsigned int input,
	75	unsigned int minimum, unsigned int maximum)
	76	{
	77	*minimum = max(uds_output_size(input, UDS_MAX_FACTOR), UDS_MIN_SIZE);
	78	*maximum = min(uds_output_size(input, UDS_MIN_FACTOR), UDS_MAX_SIZE);
	79	}
	80
	81	/*
	82	* uds_passband_width - Return the passband filter width for a scaling ratio
	83	* @ratio: scaling ratio in U4.12 fixed-point format
	84	*/
	85	static unsigned int uds_passband_width(unsigned int ratio)
	86	{
	87	if (ratio >= 4096) {
	88	/* Down-scaling */
	89	unsigned int mp;
	90
	91	mp = ratio / 4096;
	92	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	93
	94	return 64 * 4096 * mp / ratio;
	95	} else {
	96	/* Up-scaling */
	97	return 64;
	98	}
	99	}
	100
	101	static unsigned int uds_compute_ratio(unsigned int input, unsigned int output)
	102	{
	103	/* TODO: This is an approximation that will need to be refined. */
	104	return (input - 1) * 4096 / (output - 1);
	105	}
	106
26e0ca22 LP	107	/* -----------------------------------------------------------------------------
	108	* V4L2 Subdevice Core Operations
	109	*/
	110
	111	static int uds_s_stream(struct v4l2_subdev *subdev, int enable)
	112	{
26e0ca22	113	struct vsp1_uds *uds = to_uds(subdev);
bdc2df62 LP	114	const struct v4l2_mbus_framefmt *output;
	115	const struct v4l2_mbus_framefmt *input;
	116	unsigned int hscale;
	117	unsigned int vscale;
	118	bool multitap;
26e0ca22 LP	119
	120	if (!enable)
	121	return 0;
	122
e790c3cb LP	123	input = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
	124	UDS_PAD_SINK);
	125	output = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
	126	UDS_PAD_SOURCE);
bdc2df62 LP	127
	128	hscale = uds_compute_ratio(input->width, output->width);
	129	vscale = uds_compute_ratio(input->height, output->height);
	130
	131	dev_dbg(uds->entity.vsp1->dev, "hscale %u vscale %u\n", hscale, vscale);
	132
	133	/* Multi-tap scaling can't be enabled along with alpha scaling when
	134	* scaling down with a factor lower than or equal to 1/2 in either
	135	* direction.
	136	*/
	137	if (uds->scale_alpha && (hscale >= 8192 \|\| vscale >= 8192))
	138	multitap = false;
	139	else
	140	multitap = true;
	141
	142	vsp1_uds_write(uds, VI6_UDS_CTRL,
	143	(uds->scale_alpha ? VI6_UDS_CTRL_AON : 0) \|
	144	(multitap ? VI6_UDS_CTRL_BC : 0));
26e0ca22 LP	145
26e0ca22 LP	146	vsp1_uds_write(uds, VI6_UDS_PASS_BWIDTH,
bdc2df62	147	(uds_passband_width(hscale)
26e0ca22	148	<< VI6_UDS_PASS_BWIDTH_H_SHIFT) \|
bdc2df62	149	(uds_passband_width(vscale)
26e0ca22 LP	150	<< VI6_UDS_PASS_BWIDTH_V_SHIFT));
26e0ca22 LP	151
26e0ca22	152	/* Set the scaling ratios and the output size. */
26e0ca22	153	vsp1_uds_write(uds, VI6_UDS_SCALE,
bdc2df62 LP	154	(hscale << VI6_UDS_SCALE_HFRAC_SHIFT) \|
bdc2df62 LP	155	(vscale << VI6_UDS_SCALE_VFRAC_SHIFT));
26e0ca22	156	vsp1_uds_write(uds, VI6_UDS_CLIP_SIZE,
bdc2df62 LP	157	(output->width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) \|
bdc2df62 LP	158	(output->height << VI6_UDS_CLIP_SIZE_VSIZE_SHIFT));
26e0ca22 LP	159
	160	return 0;
	161	}
	162
	163	/* -----------------------------------------------------------------------------
	164	* V4L2 Subdevice Pad Operations
	165	*/
	166
	167	static int uds_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	168	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	169	struct v4l2_subdev_mbus_code_enum *code)
	170	{
	171	static const unsigned int codes[] = {
27ffaeb0 BB	172	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	173	MEDIA_BUS_FMT_AYUV8_1X32,
26e0ca22	174	};
3f1ccf16	175	struct vsp1_uds *uds = to_uds(subdev);
26e0ca22 LP	176
	177	if (code->pad == UDS_PAD_SINK) {
	178	if (code->index >= ARRAY_SIZE(codes))
	179	return -EINVAL;
	180
	181	code->code = codes[code->index];
	182	} else {
e790c3cb	183	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	184	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	185
e790c3cb LP	186	config = vsp1_entity_get_pad_config(&uds->entity, cfg,
	187	code->which);
	188	if (!config)
	189	return -EINVAL;
	190
26e0ca22 LP	191	/* The UDS can't perform format conversion, the sink format is
	192	* always identical to the source format.
	193	*/
	194	if (code->index)
	195	return -EINVAL;
	196
e790c3cb LP	197	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	198	UDS_PAD_SINK);
26e0ca22 LP	199	code->code = format->code;
	200	}
	201
	202	return 0;
	203	}
	204
	205	static int uds_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	206	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	207	struct v4l2_subdev_frame_size_enum *fse)
26e0ca22 LP	208	{
5778e749	209	struct vsp1_uds *uds = to_uds(subdev);
e790c3cb	210	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	211	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	212
e790c3cb LP	213	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fse->which);
	214	if (!config)
	215	return -EINVAL;
	216
	217	format = vsp1_entity_get_pad_format(&uds->entity, config,
	218	UDS_PAD_SINK);
26e0ca22 LP	219
	220	if (fse->index \|\| fse->code != format->code)
	221	return -EINVAL;
	222
	223	if (fse->pad == UDS_PAD_SINK) {
	224	fse->min_width = UDS_MIN_SIZE;
	225	fse->max_width = UDS_MAX_SIZE;
	226	fse->min_height = UDS_MIN_SIZE;
	227	fse->max_height = UDS_MAX_SIZE;
	228	} else {
	229	uds_output_limits(format->width, &fse->min_width,
	230	&fse->max_width);
	231	uds_output_limits(format->height, &fse->min_height,
	232	&fse->max_height);
	233	}
	234
	235	return 0;
	236	}
	237
1bd0a1bd LP	238	static int uds_get_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	239	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	240	struct v4l2_subdev_format *fmt)
	241	{
	242	struct vsp1_uds *uds = to_uds(subdev);
e790c3cb	243	struct v4l2_subdev_pad_config *config;
26e0ca22	244
e790c3cb LP	245	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which);
	246	if (!config)
	247	return -EINVAL;
	248
	249	fmt->format = *vsp1_entity_get_pad_format(&uds->entity, config,
	250	fmt->pad);
26e0ca22 LP	251
	252	return 0;
	253	}
	254
1bd0a1bd	255	static void uds_try_format(struct vsp1_uds *uds,
e790c3cb LP	256	struct v4l2_subdev_pad_config *config,
e790c3cb LP	257	unsigned int pad, struct v4l2_mbus_framefmt *fmt)
26e0ca22 LP	258	{
	259	struct v4l2_mbus_framefmt *format;
	260	unsigned int minimum;
	261	unsigned int maximum;
	262
	263	switch (pad) {
	264	case UDS_PAD_SINK:
	265	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	266	if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	267	fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
	268	fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
26e0ca22 LP	269
	270	fmt->width = clamp(fmt->width, UDS_MIN_SIZE, UDS_MAX_SIZE);
	271	fmt->height = clamp(fmt->height, UDS_MIN_SIZE, UDS_MAX_SIZE);
	272	break;
	273
	274	case UDS_PAD_SOURCE:
	275	/* The UDS scales but can't perform format conversion. */
e790c3cb LP	276	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	277	UDS_PAD_SINK);
26e0ca22 LP	278	fmt->code = format->code;
	279
	280	uds_output_limits(format->width, &minimum, &maximum);
	281	fmt->width = clamp(fmt->width, minimum, maximum);
	282	uds_output_limits(format->height, &minimum, &maximum);
	283	fmt->height = clamp(fmt->height, minimum, maximum);
	284	break;
	285	}
	286
	287	fmt->field = V4L2_FIELD_NONE;
	288	fmt->colorspace = V4L2_COLORSPACE_SRGB;
	289	}
	290
1bd0a1bd LP	291	static int uds_set_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	292	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	293	struct v4l2_subdev_format *fmt)
	294	{
	295	struct vsp1_uds *uds = to_uds(subdev);
e790c3cb	296	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	297	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	298
e790c3cb LP	299	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which);
	300	if (!config)
	301	return -EINVAL;
	302
	303	uds_try_format(uds, config, fmt->pad, &fmt->format);
26e0ca22	304
e790c3cb	305	format = vsp1_entity_get_pad_format(&uds->entity, config, fmt->pad);
26e0ca22 LP	306	*format = fmt->format;
	307
	308	if (fmt->pad == UDS_PAD_SINK) {
	309	/* Propagate the format to the source pad. */
e790c3cb LP	310	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	311	UDS_PAD_SOURCE);
26e0ca22 LP	312	*format = fmt->format;
26e0ca22 LP	313
e790c3cb	314	uds_try_format(uds, config, UDS_PAD_SOURCE, format);
26e0ca22 LP	315	}
26e0ca22 LP	316
26e0ca22 LP	317	return 0;
	318	}
	319
	320	/* -----------------------------------------------------------------------------
	321	* V4L2 Subdevice Operations
	322	*/
	323
	324	static struct v4l2_subdev_video_ops uds_video_ops = {
	325	.s_stream = uds_s_stream,
	326	};
	327
	328	static struct v4l2_subdev_pad_ops uds_pad_ops = {
0efdf0f5	329	.init_cfg = vsp1_entity_init_cfg,
26e0ca22 LP	330	.enum_mbus_code = uds_enum_mbus_code,
	331	.enum_frame_size = uds_enum_frame_size,
	332	.get_fmt = uds_get_format,
	333	.set_fmt = uds_set_format,
	334	};
	335
	336	static struct v4l2_subdev_ops uds_ops = {
	337	.video = &uds_video_ops,
	338	.pad = &uds_pad_ops,
	339	};
	340
	341	/* -----------------------------------------------------------------------------
	342	* Initialization and Cleanup
	343	*/
	344
	345	struct vsp1_uds vsp1_uds_create(struct vsp1_device vsp1, unsigned int index)
	346	{
26e0ca22	347	struct vsp1_uds *uds;
823329df	348	char name[6];
26e0ca22 LP	349	int ret;
	350
	351	uds = devm_kzalloc(vsp1->dev, sizeof(*uds), GFP_KERNEL);
	352	if (uds == NULL)
	353	return ERR_PTR(-ENOMEM);
	354
	355	uds->entity.type = VSP1_ENTITY_UDS;
	356	uds->entity.index = index;
26e0ca22	357
823329df LP	358	sprintf(name, "uds.%u", index);
823329df LP	359	ret = vsp1_entity_init(vsp1, &uds->entity, name, 2, &uds_ops);
26e0ca22 LP	360	if (ret < 0)
	361	return ERR_PTR(ret);
	362
26e0ca22 LP	363	return uds;
26e0ca22 LP	364	}