[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_dl.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, struct vsp1_dl_list *dl,
				  u32 reg, u32 data)
{
	vsp1_dl_list_write(dl, reg + uds->entity.index * VI6_UDS_OFFSET, data);
}

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

void vsp1_uds_set_alpha(struct vsp1_uds *uds, struct vsp1_dl_list *dl,
			unsigned int alpha)
{
	vsp1_uds_write(uds, dl, 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 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_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 = {
	.pad    = &uds_pad_ops,
};

/* -----------------------------------------------------------------------------
 * VSP1 Entity Operations
 */

static void uds_configure(struct vsp1_entity *entity,
			  struct vsp1_pipeline *pipe,
			  struct vsp1_dl_list *dl)
{
	struct vsp1_uds *uds = to_uds(&entity->subdev);
	const struct v4l2_mbus_framefmt *output;
	const struct v4l2_mbus_framefmt *input;
	unsigned int hscale;
	unsigned int vscale;
	bool multitap;

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

	vsp1_uds_write(uds, dl, 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, dl, VI6_UDS_SCALE,
		       (hscale << VI6_UDS_SCALE_HFRAC_SHIFT) |
		       (vscale << VI6_UDS_SCALE_VFRAC_SHIFT));
	vsp1_uds_write(uds, dl, VI6_UDS_CLIP_SIZE,
		       (output->width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) |
		       (output->height << VI6_UDS_CLIP_SIZE_VSIZE_SHIFT));
}

static const struct vsp1_entity_operations uds_entity_ops = {
	.configure = uds_configure,
};

/* -----------------------------------------------------------------------------
 * 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.ops = &uds_entity_ops;
	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"
5e8dbbf3	20	#include "vsp1_dl.h"
26e0ca22 LP	21	#include "vsp1_uds.h"
	22
	23	#define UDS_MIN_SIZE 4U
	24	#define UDS_MAX_SIZE 8190U
	25
	26	#define UDS_MIN_FACTOR 0x0100
	27	#define UDS_MAX_FACTOR 0xffff
	28
	29	/* -----------------------------------------------------------------------------
	30	* Device Access
	31	*/
	32
5e8dbbf3 LP	33	static inline void vsp1_uds_write(struct vsp1_uds uds, struct vsp1_dl_list dl,
5e8dbbf3 LP	34	u32 reg, u32 data)
26e0ca22	35	{
5e8dbbf3	36	vsp1_dl_list_write(dl, reg + uds->entity.index * VI6_UDS_OFFSET, data);
26e0ca22 LP	37	}
	38
	39	/* -----------------------------------------------------------------------------
	40	* Scaling Computation
	41	*/
	42
5e8dbbf3 LP	43	void vsp1_uds_set_alpha(struct vsp1_uds uds, struct vsp1_dl_list dl,
5e8dbbf3 LP	44	unsigned int alpha)
bdc2df62	45	{
5e8dbbf3 LP	46	vsp1_uds_write(uds, dl, VI6_UDS_ALPVAL,
5e8dbbf3 LP	47	alpha << VI6_UDS_ALPVAL_VAL0_SHIFT);
bdc2df62 LP	48	}
bdc2df62 LP	49
26e0ca22 LP	50	/*
	51	* uds_output_size - Return the output size for an input size and scaling ratio
	52	* @input: input size in pixels
	53	* @ratio: scaling ratio in U4.12 fixed-point format
	54	*/
	55	static unsigned int uds_output_size(unsigned int input, unsigned int ratio)
	56	{
	57	if (ratio > 4096) {
	58	/* Down-scaling */
	59	unsigned int mp;
	60
	61	mp = ratio / 4096;
	62	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	63
	64	return (input - 1) / mp * mp * 4096 / ratio + 1;
	65	} else {
	66	/* Up-scaling */
	67	return (input - 1) * 4096 / ratio + 1;
	68	}
	69	}
	70
	71	/*
	72	* uds_output_limits - Return the min and max output sizes for an input size
	73	* @input: input size in pixels
	74	* @minimum: minimum output size (returned)
	75	* @maximum: maximum output size (returned)
	76	*/
	77	static void uds_output_limits(unsigned int input,
	78	unsigned int minimum, unsigned int maximum)
	79	{
	80	*minimum = max(uds_output_size(input, UDS_MAX_FACTOR), UDS_MIN_SIZE);
	81	*maximum = min(uds_output_size(input, UDS_MIN_FACTOR), UDS_MAX_SIZE);
	82	}
	83
	84	/*
	85	* uds_passband_width - Return the passband filter width for a scaling ratio
	86	* @ratio: scaling ratio in U4.12 fixed-point format
	87	*/
	88	static unsigned int uds_passband_width(unsigned int ratio)
	89	{
	90	if (ratio >= 4096) {
	91	/* Down-scaling */
	92	unsigned int mp;
	93
	94	mp = ratio / 4096;
	95	mp = mp < 4 ? 1 : (mp < 8 ? 2 : 4);
	96
	97	return 64 * 4096 * mp / ratio;
	98	} else {
	99	/* Up-scaling */
	100	return 64;
	101	}
	102	}
	103
	104	static unsigned int uds_compute_ratio(unsigned int input, unsigned int output)
	105	{
	106	/* TODO: This is an approximation that will need to be refined. */
	107	return (input - 1) * 4096 / (output - 1);
	108	}
	109
26e0ca22 LP	110	/* -----------------------------------------------------------------------------
	111	* V4L2 Subdevice Pad Operations
	112	*/
	113
	114	static int uds_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	115	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	116	struct v4l2_subdev_mbus_code_enum *code)
	117	{
	118	static const unsigned int codes[] = {
27ffaeb0 BB	119	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	120	MEDIA_BUS_FMT_AYUV8_1X32,
26e0ca22	121	};
3f1ccf16	122	struct vsp1_uds *uds = to_uds(subdev);
26e0ca22 LP	123
	124	if (code->pad == UDS_PAD_SINK) {
	125	if (code->index >= ARRAY_SIZE(codes))
	126	return -EINVAL;
	127
	128	code->code = codes[code->index];
	129	} else {
e790c3cb	130	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	131	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	132
e790c3cb LP	133	config = vsp1_entity_get_pad_config(&uds->entity, cfg,
	134	code->which);
	135	if (!config)
	136	return -EINVAL;
	137
26e0ca22 LP	138	/* The UDS can't perform format conversion, the sink format is
	139	* always identical to the source format.
	140	*/
	141	if (code->index)
	142	return -EINVAL;
	143
e790c3cb LP	144	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	145	UDS_PAD_SINK);
26e0ca22 LP	146	code->code = format->code;
	147	}
	148
	149	return 0;
	150	}
	151
	152	static int uds_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	153	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	154	struct v4l2_subdev_frame_size_enum *fse)
26e0ca22 LP	155	{
5778e749	156	struct vsp1_uds *uds = to_uds(subdev);
e790c3cb	157	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	158	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	159
e790c3cb LP	160	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fse->which);
	161	if (!config)
	162	return -EINVAL;
	163
	164	format = vsp1_entity_get_pad_format(&uds->entity, config,
	165	UDS_PAD_SINK);
26e0ca22 LP	166
	167	if (fse->index \|\| fse->code != format->code)
	168	return -EINVAL;
	169
	170	if (fse->pad == UDS_PAD_SINK) {
	171	fse->min_width = UDS_MIN_SIZE;
	172	fse->max_width = UDS_MAX_SIZE;
	173	fse->min_height = UDS_MIN_SIZE;
	174	fse->max_height = UDS_MAX_SIZE;
	175	} else {
	176	uds_output_limits(format->width, &fse->min_width,
	177	&fse->max_width);
	178	uds_output_limits(format->height, &fse->min_height,
	179	&fse->max_height);
	180	}
	181
	182	return 0;
	183	}
	184
1bd0a1bd LP	185	static int uds_get_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	186	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	187	struct v4l2_subdev_format *fmt)
	188	{
	189	struct vsp1_uds *uds = to_uds(subdev);
e790c3cb	190	struct v4l2_subdev_pad_config *config;
26e0ca22	191
e790c3cb LP	192	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which);
	193	if (!config)
	194	return -EINVAL;
	195
	196	fmt->format = *vsp1_entity_get_pad_format(&uds->entity, config,
	197	fmt->pad);
26e0ca22 LP	198
	199	return 0;
	200	}
	201
1bd0a1bd	202	static void uds_try_format(struct vsp1_uds *uds,
e790c3cb LP	203	struct v4l2_subdev_pad_config *config,
e790c3cb LP	204	unsigned int pad, struct v4l2_mbus_framefmt *fmt)
26e0ca22 LP	205	{
	206	struct v4l2_mbus_framefmt *format;
	207	unsigned int minimum;
	208	unsigned int maximum;
	209
	210	switch (pad) {
	211	case UDS_PAD_SINK:
	212	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	213	if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	214	fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
	215	fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
26e0ca22 LP	216
	217	fmt->width = clamp(fmt->width, UDS_MIN_SIZE, UDS_MAX_SIZE);
	218	fmt->height = clamp(fmt->height, UDS_MIN_SIZE, UDS_MAX_SIZE);
	219	break;
	220
	221	case UDS_PAD_SOURCE:
	222	/* The UDS scales but can't perform format conversion. */
e790c3cb LP	223	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	224	UDS_PAD_SINK);
26e0ca22 LP	225	fmt->code = format->code;
	226
	227	uds_output_limits(format->width, &minimum, &maximum);
	228	fmt->width = clamp(fmt->width, minimum, maximum);
	229	uds_output_limits(format->height, &minimum, &maximum);
	230	fmt->height = clamp(fmt->height, minimum, maximum);
	231	break;
	232	}
	233
	234	fmt->field = V4L2_FIELD_NONE;
	235	fmt->colorspace = V4L2_COLORSPACE_SRGB;
	236	}
	237
1bd0a1bd LP	238	static int uds_set_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 LP	244	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	245
e790c3cb LP	246	config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which);
	247	if (!config)
	248	return -EINVAL;
	249
	250	uds_try_format(uds, config, fmt->pad, &fmt->format);
26e0ca22	251
e790c3cb	252	format = vsp1_entity_get_pad_format(&uds->entity, config, fmt->pad);
26e0ca22 LP	253	*format = fmt->format;
	254
	255	if (fmt->pad == UDS_PAD_SINK) {
	256	/* Propagate the format to the source pad. */
e790c3cb LP	257	format = vsp1_entity_get_pad_format(&uds->entity, config,
e790c3cb LP	258	UDS_PAD_SOURCE);
26e0ca22 LP	259	*format = fmt->format;
26e0ca22 LP	260
e790c3cb	261	uds_try_format(uds, config, UDS_PAD_SOURCE, format);
26e0ca22 LP	262	}
26e0ca22 LP	263
26e0ca22 LP	264	return 0;
	265	}
	266
	267	/* -----------------------------------------------------------------------------
	268	* V4L2 Subdevice Operations
	269	*/
	270
26e0ca22	271	static struct v4l2_subdev_pad_ops uds_pad_ops = {
0efdf0f5	272	.init_cfg = vsp1_entity_init_cfg,
26e0ca22 LP	273	.enum_mbus_code = uds_enum_mbus_code,
	274	.enum_frame_size = uds_enum_frame_size,
	275	.get_fmt = uds_get_format,
	276	.set_fmt = uds_set_format,
	277	};
	278
	279	static struct v4l2_subdev_ops uds_ops = {
26e0ca22 LP	280	.pad = &uds_pad_ops,
	281	};
	282
7b905f05 LP	283	/* -----------------------------------------------------------------------------
	284	* VSP1 Entity Operations
	285	*/
	286
83dd019d LP	287	static void uds_configure(struct vsp1_entity *entity,
	288	struct vsp1_pipeline *pipe,
	289	struct vsp1_dl_list *dl)
7b905f05 LP	290	{
	291	struct vsp1_uds *uds = to_uds(&entity->subdev);
	292	const struct v4l2_mbus_framefmt *output;
	293	const struct v4l2_mbus_framefmt *input;
	294	unsigned int hscale;
	295	unsigned int vscale;
	296	bool multitap;
	297
	298	input = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
	299	UDS_PAD_SINK);
	300	output = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config,
	301	UDS_PAD_SOURCE);
	302
	303	hscale = uds_compute_ratio(input->width, output->width);
	304	vscale = uds_compute_ratio(input->height, output->height);
	305
	306	dev_dbg(uds->entity.vsp1->dev, "hscale %u vscale %u\n", hscale, vscale);
	307
	308	/* Multi-tap scaling can't be enabled along with alpha scaling when
	309	* scaling down with a factor lower than or equal to 1/2 in either
	310	* direction.
	311	*/
	312	if (uds->scale_alpha && (hscale >= 8192 \|\| vscale >= 8192))
	313	multitap = false;
	314	else
	315	multitap = true;
	316
5e8dbbf3	317	vsp1_uds_write(uds, dl, VI6_UDS_CTRL,
7b905f05 LP	318	(uds->scale_alpha ? VI6_UDS_CTRL_AON : 0) \|
	319	(multitap ? VI6_UDS_CTRL_BC : 0));
	320
5e8dbbf3	321	vsp1_uds_write(uds, dl, VI6_UDS_PASS_BWIDTH,
7b905f05 LP	322	(uds_passband_width(hscale)
	323	<< VI6_UDS_PASS_BWIDTH_H_SHIFT) \|
	324	(uds_passband_width(vscale)
	325	<< VI6_UDS_PASS_BWIDTH_V_SHIFT));
	326
	327	/* Set the scaling ratios and the output size. */
5e8dbbf3	328	vsp1_uds_write(uds, dl, VI6_UDS_SCALE,
7b905f05 LP	329	(hscale << VI6_UDS_SCALE_HFRAC_SHIFT) \|
7b905f05 LP	330	(vscale << VI6_UDS_SCALE_VFRAC_SHIFT));
5e8dbbf3	331	vsp1_uds_write(uds, dl, VI6_UDS_CLIP_SIZE,
7b905f05 LP	332	(output->width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) \|
	333	(output->height << VI6_UDS_CLIP_SIZE_VSIZE_SHIFT));
	334	}
	335
	336	static const struct vsp1_entity_operations uds_entity_ops = {
	337	.configure = uds_configure,
	338	};
	339
26e0ca22 LP	340	/* -----------------------------------------------------------------------------
	341	* Initialization and Cleanup
	342	*/
	343
	344	struct vsp1_uds vsp1_uds_create(struct vsp1_device vsp1, unsigned int index)
	345	{
26e0ca22	346	struct vsp1_uds *uds;
823329df	347	char name[6];
26e0ca22 LP	348	int ret;
	349
	350	uds = devm_kzalloc(vsp1->dev, sizeof(*uds), GFP_KERNEL);
	351	if (uds == NULL)
	352	return ERR_PTR(-ENOMEM);
	353
7b905f05	354	uds->entity.ops = &uds_entity_ops;
26e0ca22 LP	355	uds->entity.type = VSP1_ENTITY_UDS;
26e0ca22 LP	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	}