[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 u32 vsp1_sru_read(struct vsp1_sru *sru, u32 reg)
{
	return vsp1_read(sru->entity.vsp1, reg);
}

static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
{
	vsp1_write(sru->entity.vsp1, 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);
	const struct vsp1_sru_param *param;
	u32 value;

	switch (ctrl->id) {
	case V4L2_CID_VSP1_SRU_INTENSITY:
		param = &vsp1_sru_params[ctrl->val - 1];

		value = vsp1_sru_read(sru, VI6_SRU_CTRL0);
		value &= ~(VI6_SRU_CTRL0_PARAM0_MASK |
			   VI6_SRU_CTRL0_PARAM1_MASK);
		value |= param->ctrl0;
		vsp1_sru_write(sru, VI6_SRU_CTRL0, value);

		vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);
		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)
{
	struct vsp1_sru *sru = to_sru(subdev);
	struct v4l2_mbus_framefmt *input;
	struct v4l2_mbus_framefmt *output;
	u32 ctrl0;
	int ret;

	ret = vsp1_entity_set_streaming(&sru->entity, enable);
	if (ret < 0)
		return ret;

	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;

	/* Take the control handler lock to ensure that the CTRL0 value won't be
	 * changed behind our back by a set control operation.
	 */
	if (sru->entity.vsp1->info->uapi)
		mutex_lock(sru->ctrls.lock);
	ctrl0 |= vsp1_sru_read(sru, VI6_SRU_CTRL0)
	       & (VI6_SRU_CTRL0_PARAM0_MASK | VI6_SRU_CTRL0_PARAM1_MASK);
	vsp1_sru_write(sru, VI6_SRU_CTRL0, ctrl0);
	if (sru->entity.vsp1->info->uapi)
		mutex_unlock(sru->ctrls.lock);

	vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);

	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 v4l2_subdev *subdev;
	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, 2);
	if (ret < 0)
		return ERR_PTR(ret);

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

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

	vsp1_entity_init_formats(subdev, NULL);

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

	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
	29	static inline u32 vsp1_sru_read(struct vsp1_sru *sru, u32 reg)
	30	{
	31	return vsp1_read(sru->entity.vsp1, reg);
	32	}
	33
	34	static inline void vsp1_sru_write(struct vsp1_sru *sru, u32 reg, u32 data)
	35	{
	36	vsp1_write(sru->entity.vsp1, reg, data);
	37	}
	38
	39	/* -----------------------------------------------------------------------------
	40	* Controls
	41	*/
	42
	43	#define V4L2_CID_VSP1_SRU_INTENSITY (V4L2_CID_USER_BASE + 1)
	44
a626e64e LP	45	struct vsp1_sru_param {
	46	u32 ctrl0;
	47	u32 ctrl2;
	48	};
	49
	50	#define VI6_SRU_CTRL0_PARAMS(p0, p1) \
	51	(((p0) << VI6_SRU_CTRL0_PARAM0_SHIFT) \| \
	52	((p1) << VI6_SRU_CTRL0_PARAM1_SHIFT))
	53
	54	#define VI6_SRU_CTRL2_PARAMS(p6, p7, p8) \
	55	(((p6) << VI6_SRU_CTRL2_PARAM6_SHIFT) \| \
	56	((p7) << VI6_SRU_CTRL2_PARAM7_SHIFT) \| \
	57	((p8) << VI6_SRU_CTRL2_PARAM8_SHIFT))
	58
	59	static const struct vsp1_sru_param vsp1_sru_params[] = {
	60	{
	61	.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) \| VI6_SRU_CTRL0_EN,
	62	.ctrl2 = VI6_SRU_CTRL2_PARAMS(24, 40, 255),
	63	}, {
	64	.ctrl0 = VI6_SRU_CTRL0_PARAMS(256, 4) \| VI6_SRU_CTRL0_EN,
	65	.ctrl2 = VI6_SRU_CTRL2_PARAMS(8, 16, 255),
	66	}, {
	67	.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) \| VI6_SRU_CTRL0_EN,
	68	.ctrl2 = VI6_SRU_CTRL2_PARAMS(36, 60, 255),
	69	}, {
	70	.ctrl0 = VI6_SRU_CTRL0_PARAMS(384, 5) \| VI6_SRU_CTRL0_EN,
	71	.ctrl2 = VI6_SRU_CTRL2_PARAMS(12, 27, 255),
	72	}, {
	73	.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) \| VI6_SRU_CTRL0_EN,
	74	.ctrl2 = VI6_SRU_CTRL2_PARAMS(48, 80, 255),
	75	}, {
	76	.ctrl0 = VI6_SRU_CTRL0_PARAMS(511, 6) \| VI6_SRU_CTRL0_EN,
	77	.ctrl2 = VI6_SRU_CTRL2_PARAMS(16, 36, 255),
	78	},
	79	};
	80
58f896d8 LP	81	static int sru_s_ctrl(struct v4l2_ctrl *ctrl)
	82	{
	83	struct vsp1_sru *sru =
	84	container_of(ctrl->handler, struct vsp1_sru, ctrls);
	85	const struct vsp1_sru_param *param;
	86	u32 value;
	87
	88	switch (ctrl->id) {
	89	case V4L2_CID_VSP1_SRU_INTENSITY:
	90	param = &vsp1_sru_params[ctrl->val - 1];
	91
	92	value = vsp1_sru_read(sru, VI6_SRU_CTRL0);
	93	value &= ~(VI6_SRU_CTRL0_PARAM0_MASK \|
	94	VI6_SRU_CTRL0_PARAM1_MASK);
	95	value \|= param->ctrl0;
	96	vsp1_sru_write(sru, VI6_SRU_CTRL0, value);
	97
	98	vsp1_sru_write(sru, VI6_SRU_CTRL2, param->ctrl2);
	99	break;
	100	}
	101
	102	return 0;
	103	}
	104
	105	static const struct v4l2_ctrl_ops sru_ctrl_ops = {
	106	.s_ctrl = sru_s_ctrl,
	107	};
	108
	109	static const struct v4l2_ctrl_config sru_intensity_control = {
	110	.ops = &sru_ctrl_ops,
	111	.id = V4L2_CID_VSP1_SRU_INTENSITY,
	112	.name = "Intensity",
	113	.type = V4L2_CTRL_TYPE_INTEGER,
	114	.min = 1,
	115	.max = 6,
	116	.def = 1,
	117	.step = 1,
	118	};
	119
	120	/* -----------------------------------------------------------------------------
	121	* V4L2 Subdevice Core Operations
	122	*/
	123
a626e64e LP	124	static int sru_s_stream(struct v4l2_subdev *subdev, int enable)
	125	{
	126	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	127	struct v4l2_mbus_framefmt *input;
a626e64e LP	128	struct v4l2_mbus_framefmt *output;
a626e64e	129	u32 ctrl0;
58f896d8 LP	130	int ret;
	131
	132	ret = vsp1_entity_set_streaming(&sru->entity, enable);
	133	if (ret < 0)
	134	return ret;
a626e64e LP	135
	136	if (!enable)
	137	return 0;
	138
	139	input = &sru->entity.formats[SRU_PAD_SINK];
	140	output = &sru->entity.formats[SRU_PAD_SOURCE];
a626e64e	141
27ffaeb0	142	if (input->code == MEDIA_BUS_FMT_ARGB8888_1X32)
a626e64e LP	143	ctrl0 = VI6_SRU_CTRL0_PARAM2 \| VI6_SRU_CTRL0_PARAM3
	144	\| VI6_SRU_CTRL0_PARAM4;
	145	else
	146	ctrl0 = VI6_SRU_CTRL0_PARAM3;
	147
58f896d8 LP	148	if (input->width != output->width)
	149	ctrl0 \|= VI6_SRU_CTRL0_MODE_UPSCALE;
	150
	151	/* Take the control handler lock to ensure that the CTRL0 value won't be
	152	* changed behind our back by a set control operation.
	153	*/
5aa2eb3c	154	if (sru->entity.vsp1->info->uapi)
f2ed459d	155	mutex_lock(sru->ctrls.lock);
58f896d8 LP	156	ctrl0 \|= vsp1_sru_read(sru, VI6_SRU_CTRL0)
58f896d8 LP	157	& (VI6_SRU_CTRL0_PARAM0_MASK \| VI6_SRU_CTRL0_PARAM1_MASK);
f6acfcdc	158	vsp1_sru_write(sru, VI6_SRU_CTRL0, ctrl0);
5aa2eb3c	159	if (sru->entity.vsp1->info->uapi)
f2ed459d	160	mutex_unlock(sru->ctrls.lock);
58f896d8	161
a626e64e	162	vsp1_sru_write(sru, VI6_SRU_CTRL1, VI6_SRU_CTRL1_PARAM5);
a626e64e LP	163
	164	return 0;
	165	}
	166
	167	/* -----------------------------------------------------------------------------
	168	* V4L2 Subdevice Pad Operations
	169	*/
	170
	171	static int sru_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	172	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	173	struct v4l2_subdev_mbus_code_enum *code)
	174	{
	175	static const unsigned int codes[] = {
27ffaeb0 BB	176	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	177	MEDIA_BUS_FMT_AYUV8_1X32,
a626e64e	178	};
3f1ccf16	179	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	180	struct v4l2_mbus_framefmt *format;
	181
	182	if (code->pad == SRU_PAD_SINK) {
	183	if (code->index >= ARRAY_SIZE(codes))
	184	return -EINVAL;
	185
	186	code->code = codes[code->index];
	187	} else {
	188	/* The SRU 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
3f1ccf16 HV	194	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
3f1ccf16 HV	195	SRU_PAD_SINK, code->which);
a626e64e LP	196	code->code = format->code;
	197	}
	198
	199	return 0;
	200	}
	201
	202	static int sru_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	203	struct v4l2_subdev_pad_config *cfg,
a626e64e LP	204	struct v4l2_subdev_frame_size_enum *fse)
a626e64e LP	205	{
5778e749	206	struct vsp1_sru *sru = to_sru(subdev);
a626e64e LP	207	struct v4l2_mbus_framefmt *format;
a626e64e LP	208
5778e749 HV	209	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
5778e749 HV	210	SRU_PAD_SINK, fse->which);
a626e64e LP	211
	212	if (fse->index \|\| fse->code != format->code)
	213	return -EINVAL;
	214
	215	if (fse->pad == SRU_PAD_SINK) {
	216	fse->min_width = SRU_MIN_SIZE;
	217	fse->max_width = SRU_MAX_SIZE;
	218	fse->min_height = SRU_MIN_SIZE;
	219	fse->max_height = SRU_MAX_SIZE;
	220	} else {
	221	fse->min_width = format->width;
	222	fse->min_height = format->height;
	223	if (format->width <= SRU_MAX_SIZE / 2 &&
	224	format->height <= SRU_MAX_SIZE / 2) {
	225	fse->max_width = format->width * 2;
	226	fse->max_height = format->height * 2;
	227	} else {
	228	fse->max_width = format->width;
	229	fse->max_height = format->height;
	230	}
	231	}
	232
	233	return 0;
	234	}
	235
f7234138	236	static int sru_get_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
a626e64e LP	237	struct v4l2_subdev_format *fmt)
	238	{
	239	struct vsp1_sru *sru = to_sru(subdev);
	240
f7234138	241	fmt->format = *vsp1_entity_get_pad_format(&sru->entity, cfg, fmt->pad,
a626e64e LP	242	fmt->which);
	243
	244	return 0;
	245	}
	246
f7234138	247	static void sru_try_format(struct vsp1_sru sru, struct v4l2_subdev_pad_config cfg,
a626e64e LP	248	unsigned int pad, struct v4l2_mbus_framefmt *fmt,
	249	enum v4l2_subdev_format_whence which)
	250	{
	251	struct v4l2_mbus_framefmt *format;
	252	unsigned int input_area;
	253	unsigned int output_area;
	254
	255	switch (pad) {
	256	case SRU_PAD_SINK:
	257	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	258	if (fmt->code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	259	fmt->code != MEDIA_BUS_FMT_AYUV8_1X32)
	260	fmt->code = MEDIA_BUS_FMT_AYUV8_1X32;
a626e64e LP	261
	262	fmt->width = clamp(fmt->width, SRU_MIN_SIZE, SRU_MAX_SIZE);
	263	fmt->height = clamp(fmt->height, SRU_MIN_SIZE, SRU_MAX_SIZE);
	264	break;
	265
	266	case SRU_PAD_SOURCE:
	267	/* The SRU can't perform format conversion. */
f7234138	268	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
a626e64e LP	269	SRU_PAD_SINK, which);
	270	fmt->code = format->code;
	271
	272	/* We can upscale by 2 in both direction, but not independently.
	273	* Compare the input and output rectangles areas (avoiding
	274	* integer overflows on the output): if the requested output
	275	* area is larger than 1.5^2 the input area upscale by two,
	276	* otherwise don't scale.
	277	*/
	278	input_area = format->width * format->height;
	279	output_area = min(fmt->width, SRU_MAX_SIZE)
	280	* min(fmt->height, SRU_MAX_SIZE);
	281
	282	if (fmt->width <= SRU_MAX_SIZE / 2 &&
	283	fmt->height <= SRU_MAX_SIZE / 2 &&
	284	output_area > input_area * 9 / 4) {
	285	fmt->width = format->width * 2;
	286	fmt->height = format->height * 2;
	287	} else {
	288	fmt->width = format->width;
	289	fmt->height = format->height;
	290	}
	291	break;
	292	}
	293
	294	fmt->field = V4L2_FIELD_NONE;
	295	fmt->colorspace = V4L2_COLORSPACE_SRGB;
	296	}
	297
f7234138	298	static int sru_set_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
a626e64e LP	299	struct v4l2_subdev_format *fmt)
	300	{
	301	struct vsp1_sru *sru = to_sru(subdev);
	302	struct v4l2_mbus_framefmt *format;
	303
f7234138	304	sru_try_format(sru, cfg, fmt->pad, &fmt->format, fmt->which);
a626e64e	305
f7234138	306	format = vsp1_entity_get_pad_format(&sru->entity, cfg, fmt->pad,
a626e64e LP	307	fmt->which);
	308	*format = fmt->format;
	309
	310	if (fmt->pad == SRU_PAD_SINK) {
	311	/* Propagate the format to the source pad. */
f7234138	312	format = vsp1_entity_get_pad_format(&sru->entity, cfg,
a626e64e LP	313	SRU_PAD_SOURCE, fmt->which);
	314	*format = fmt->format;
	315
f7234138	316	sru_try_format(sru, cfg, SRU_PAD_SOURCE, format, fmt->which);
a626e64e LP	317	}
	318
	319	return 0;
	320	}
	321
	322	/* -----------------------------------------------------------------------------
	323	* V4L2 Subdevice Operations
	324	*/
	325
	326	static struct v4l2_subdev_video_ops sru_video_ops = {
	327	.s_stream = sru_s_stream,
	328	};
	329
	330	static struct v4l2_subdev_pad_ops sru_pad_ops = {
	331	.enum_mbus_code = sru_enum_mbus_code,
	332	.enum_frame_size = sru_enum_frame_size,
	333	.get_fmt = sru_get_format,
	334	.set_fmt = sru_set_format,
	335	};
	336
	337	static struct v4l2_subdev_ops sru_ops = {
	338	.video = &sru_video_ops,
	339	.pad = &sru_pad_ops,
	340	};
	341
	342	/* -----------------------------------------------------------------------------
	343	* Initialization and Cleanup
	344	*/
	345
	346	struct vsp1_sru vsp1_sru_create(struct vsp1_device vsp1)
	347	{
	348	struct v4l2_subdev *subdev;
	349	struct vsp1_sru *sru;
	350	int ret;
	351
	352	sru = devm_kzalloc(vsp1->dev, sizeof(*sru), GFP_KERNEL);
	353	if (sru == NULL)
	354	return ERR_PTR(-ENOMEM);
	355
	356	sru->entity.type = VSP1_ENTITY_SRU;
a626e64e LP	357
	358	ret = vsp1_entity_init(vsp1, &sru->entity, 2);
	359	if (ret < 0)
	360	return ERR_PTR(ret);
	361
	362	/* Initialize the V4L2 subdev. */
	363	subdev = &sru->entity.subdev;
	364	v4l2_subdev_init(subdev, &sru_ops);
	365
babca007	366	subdev->entity.ops = &vsp1->media_ops;
a626e64e LP	367	subdev->internal_ops = &vsp1_subdev_internal_ops;
	368	snprintf(subdev->name, sizeof(subdev->name), "%s sru",
	369	dev_name(vsp1->dev));
	370	v4l2_set_subdevdata(subdev, sru);
	371	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	372
	373	vsp1_entity_init_formats(subdev, NULL);
	374
	375	/* Initialize the control handler. */
	376	v4l2_ctrl_handler_init(&sru->ctrls, 1);
	377	v4l2_ctrl_new_custom(&sru->ctrls, &sru_intensity_control, NULL);
a1606102	378
a626e64e LP	379	sru->entity.subdev.ctrl_handler = &sru->ctrls;
a626e64e LP	380
a1606102 LP	381	if (sru->ctrls.error) {
	382	dev_err(vsp1->dev, "sru: failed to initialize controls\n");
	383	ret = sru->ctrls.error;
	384	vsp1_entity_destroy(&sru->entity);
	385	return ERR_PTR(ret);
	386	}
	387
a626e64e LP	388	return sru;
a626e64e LP	389	}