[linux-2.6-block.git] / drivers / media / platform / vsp1 / vsp1_lif.c

/*
 * vsp1_lif.c  --  R-Car VSP1 LCD Controller Interface
 *
 * 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_lif.h"

#define LIF_MIN_SIZE				2U
#define LIF_MAX_SIZE				2048U

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

static inline void vsp1_lif_write(struct vsp1_lif *lif, u32 reg, u32 data)
{
	vsp1_mod_write(&lif->entity, reg, data);
}

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

static int lif_s_stream(struct v4l2_subdev *subdev, int enable)
{
	const struct v4l2_mbus_framefmt *format;
	struct vsp1_lif *lif = to_lif(subdev);
	unsigned int hbth = 1300;
	unsigned int obth = 400;
	unsigned int lbth = 200;

	if (!enable) {
		vsp1_write(lif->entity.vsp1, VI6_LIF_CTRL, 0);
		return 0;
	}

	format = &lif->entity.formats[LIF_PAD_SOURCE];

	obth = min(obth, (format->width + 1) / 2 * format->height - 4);

	vsp1_lif_write(lif, VI6_LIF_CSBTH,
			(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) |
			(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));

	vsp1_lif_write(lif, VI6_LIF_CTRL,
			(obth << VI6_LIF_CTRL_OBTH_SHIFT) |
			(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) |
			VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN);

	return 0;
}

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

static int lif_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_lif *lif = to_lif(subdev);

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

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

		/* The LIF 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(&lif->entity, cfg,
						    LIF_PAD_SINK, code->which);
		code->code = format->code;
	}

	return 0;
}

static int lif_enum_frame_size(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_pad_config *cfg,
			       struct v4l2_subdev_frame_size_enum *fse)
{
	struct vsp1_lif *lif = to_lif(subdev);
	struct v4l2_mbus_framefmt *format;

	format = vsp1_entity_get_pad_format(&lif->entity, cfg, LIF_PAD_SINK,
					    fse->which);

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

	if (fse->pad == LIF_PAD_SINK) {
		fse->min_width = LIF_MIN_SIZE;
		fse->max_width = LIF_MAX_SIZE;
		fse->min_height = LIF_MIN_SIZE;
		fse->max_height = LIF_MAX_SIZE;
	} else {
		fse->min_width = format->width;
		fse->max_width = format->width;
		fse->min_height = format->height;
		fse->max_height = format->height;
	}

	return 0;
}

static int lif_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_lif *lif = to_lif(subdev);

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

	return 0;
}

static int lif_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct vsp1_lif *lif = to_lif(subdev);
	struct v4l2_mbus_framefmt *format;

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

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

	if (fmt->pad == LIF_PAD_SOURCE) {
		/* The LIF source format is always identical to its sink
		 * format.
		 */
		fmt->format = *format;
		return 0;
	}

	format->code = fmt->format.code;
	format->width = clamp_t(unsigned int, fmt->format.width,
				LIF_MIN_SIZE, LIF_MAX_SIZE);
	format->height = clamp_t(unsigned int, fmt->format.height,
				 LIF_MIN_SIZE, LIF_MAX_SIZE);
	format->field = V4L2_FIELD_NONE;
	format->colorspace = V4L2_COLORSPACE_SRGB;

	fmt->format = *format;

	/* Propagate the format to the source pad. */
	format = vsp1_entity_get_pad_format(&lif->entity, cfg, LIF_PAD_SOURCE,
					    fmt->which);
	*format = fmt->format;

	return 0;
}

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

static struct v4l2_subdev_video_ops lif_video_ops = {
	.s_stream = lif_s_stream,
};

static struct v4l2_subdev_pad_ops lif_pad_ops = {
	.enum_mbus_code = lif_enum_mbus_code,
	.enum_frame_size = lif_enum_frame_size,
	.get_fmt = lif_get_format,
	.set_fmt = lif_set_format,
};

static struct v4l2_subdev_ops lif_ops = {
	.video	= &lif_video_ops,
	.pad    = &lif_pad_ops,
};

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

struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1)
{
	struct v4l2_subdev *subdev;
	struct vsp1_lif *lif;
	int ret;

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

	lif->entity.type = VSP1_ENTITY_LIF;

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

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

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

	vsp1_entity_init_formats(subdev, NULL);

	return lif;
}
Commit	Line	Data
26e0ca22 LP	1	/*
	2	* vsp1_lif.c -- R-Car VSP1 LCD Controller Interface
	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_lif.h"
	21
	22	#define LIF_MIN_SIZE 2U
	23	#define LIF_MAX_SIZE 2048U
	24
	25	/* -----------------------------------------------------------------------------
	26	* Device Access
	27	*/
	28
26e0ca22 LP	29	static inline void vsp1_lif_write(struct vsp1_lif *lif, u32 reg, u32 data)
26e0ca22 LP	30	{
1517b039	31	vsp1_mod_write(&lif->entity, reg, data);
26e0ca22 LP	32	}
	33
	34	/* -----------------------------------------------------------------------------
	35	* V4L2 Subdevice Core Operations
	36	*/
	37
	38	static int lif_s_stream(struct v4l2_subdev *subdev, int enable)
	39	{
	40	const struct v4l2_mbus_framefmt *format;
	41	struct vsp1_lif *lif = to_lif(subdev);
	42	unsigned int hbth = 1300;
	43	unsigned int obth = 400;
	44	unsigned int lbth = 200;
	45
	46	if (!enable) {
1517b039	47	vsp1_write(lif->entity.vsp1, VI6_LIF_CTRL, 0);
26e0ca22 LP	48	return 0;
	49	}
	50
	51	format = &lif->entity.formats[LIF_PAD_SOURCE];
	52
	53	obth = min(obth, (format->width + 1) / 2 * format->height - 4);
	54
	55	vsp1_lif_write(lif, VI6_LIF_CSBTH,
	56	(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) \|
	57	(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));
	58
	59	vsp1_lif_write(lif, VI6_LIF_CTRL,
	60	(obth << VI6_LIF_CTRL_OBTH_SHIFT) \|
	61	(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) \|
	62	VI6_LIF_CTRL_REQSEL \| VI6_LIF_CTRL_LIF_EN);
	63
	64	return 0;
	65	}
	66
	67	/* -----------------------------------------------------------------------------
	68	* V4L2 Subdevice Pad Operations
	69	*/
	70
	71	static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	72	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	73	struct v4l2_subdev_mbus_code_enum *code)
	74	{
	75	static const unsigned int codes[] = {
27ffaeb0 BB	76	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	77	MEDIA_BUS_FMT_AYUV8_1X32,
26e0ca22	78	};
3f1ccf16	79	struct vsp1_lif *lif = to_lif(subdev);
26e0ca22 LP	80
	81	if (code->pad == LIF_PAD_SINK) {
	82	if (code->index >= ARRAY_SIZE(codes))
	83	return -EINVAL;
	84
	85	code->code = codes[code->index];
	86	} else {
	87	struct v4l2_mbus_framefmt *format;
	88
	89	/* The LIF can't perform format conversion, the sink format is
	90	* always identical to the source format.
	91	*/
	92	if (code->index)
	93	return -EINVAL;
	94
3f1ccf16 HV	95	format = vsp1_entity_get_pad_format(&lif->entity, cfg,
3f1ccf16 HV	96	LIF_PAD_SINK, code->which);
26e0ca22 LP	97	code->code = format->code;
	98	}
	99
	100	return 0;
	101	}
	102
	103	static int lif_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	104	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	105	struct v4l2_subdev_frame_size_enum *fse)
26e0ca22 LP	106	{
5778e749	107	struct vsp1_lif *lif = to_lif(subdev);
26e0ca22 LP	108	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	109
5778e749 HV	110	format = vsp1_entity_get_pad_format(&lif->entity, cfg, LIF_PAD_SINK,
5778e749 HV	111	fse->which);
26e0ca22 LP	112
	113	if (fse->index \|\| fse->code != format->code)
	114	return -EINVAL;
	115
	116	if (fse->pad == LIF_PAD_SINK) {
	117	fse->min_width = LIF_MIN_SIZE;
	118	fse->max_width = LIF_MAX_SIZE;
	119	fse->min_height = LIF_MIN_SIZE;
	120	fse->max_height = LIF_MAX_SIZE;
	121	} else {
	122	fse->min_width = format->width;
	123	fse->max_width = format->width;
	124	fse->min_height = format->height;
	125	fse->max_height = format->height;
	126	}
	127
	128	return 0;
	129	}
	130
f7234138	131	static int lif_get_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
26e0ca22 LP	132	struct v4l2_subdev_format *fmt)
	133	{
	134	struct vsp1_lif *lif = to_lif(subdev);
	135
f7234138	136	fmt->format = *vsp1_entity_get_pad_format(&lif->entity, cfg, fmt->pad,
26e0ca22 LP	137	fmt->which);
	138
	139	return 0;
	140	}
	141
f7234138	142	static int lif_set_format(struct v4l2_subdev subdev, struct v4l2_subdev_pad_config cfg,
26e0ca22 LP	143	struct v4l2_subdev_format *fmt)
	144	{
	145	struct vsp1_lif *lif = to_lif(subdev);
	146	struct v4l2_mbus_framefmt *format;
	147
	148	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	149	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	150	fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
	151	fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
26e0ca22	152
f7234138	153	format = vsp1_entity_get_pad_format(&lif->entity, cfg, fmt->pad,
26e0ca22 LP	154	fmt->which);
	155
	156	if (fmt->pad == LIF_PAD_SOURCE) {
	157	/* The LIF source format is always identical to its sink
	158	* format.
	159	*/
	160	fmt->format = *format;
	161	return 0;
	162	}
	163
	164	format->code = fmt->format.code;
	165	format->width = clamp_t(unsigned int, fmt->format.width,
	166	LIF_MIN_SIZE, LIF_MAX_SIZE);
	167	format->height = clamp_t(unsigned int, fmt->format.height,
	168	LIF_MIN_SIZE, LIF_MAX_SIZE);
	169	format->field = V4L2_FIELD_NONE;
	170	format->colorspace = V4L2_COLORSPACE_SRGB;
	171
	172	fmt->format = *format;
	173
	174	/* Propagate the format to the source pad. */
f7234138	175	format = vsp1_entity_get_pad_format(&lif->entity, cfg, LIF_PAD_SOURCE,
26e0ca22 LP	176	fmt->which);
	177	*format = fmt->format;
	178
	179	return 0;
	180	}
	181
	182	/* -----------------------------------------------------------------------------
	183	* V4L2 Subdevice Operations
	184	*/
	185
	186	static struct v4l2_subdev_video_ops lif_video_ops = {
	187	.s_stream = lif_s_stream,
	188	};
	189
	190	static struct v4l2_subdev_pad_ops lif_pad_ops = {
	191	.enum_mbus_code = lif_enum_mbus_code,
	192	.enum_frame_size = lif_enum_frame_size,
	193	.get_fmt = lif_get_format,
	194	.set_fmt = lif_set_format,
	195	};
	196
	197	static struct v4l2_subdev_ops lif_ops = {
	198	.video = &lif_video_ops,
	199	.pad = &lif_pad_ops,
	200	};
	201
	202	/* -----------------------------------------------------------------------------
	203	* Initialization and Cleanup
	204	*/
	205
	206	struct vsp1_lif vsp1_lif_create(struct vsp1_device vsp1)
	207	{
	208	struct v4l2_subdev *subdev;
	209	struct vsp1_lif *lif;
	210	int ret;
	211
	212	lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);
	213	if (lif == NULL)
	214	return ERR_PTR(-ENOMEM);
	215
	216	lif->entity.type = VSP1_ENTITY_LIF;
26e0ca22 LP	217
	218	ret = vsp1_entity_init(vsp1, &lif->entity, 2);
	219	if (ret < 0)
	220	return ERR_PTR(ret);
	221
	222	/* Initialize the V4L2 subdev. */
	223	subdev = &lif->entity.subdev;
	224	v4l2_subdev_init(subdev, &lif_ops);
	225
babca007	226	subdev->entity.ops = &vsp1->media_ops;
26e0ca22 LP	227	subdev->internal_ops = &vsp1_subdev_internal_ops;
	228	snprintf(subdev->name, sizeof(subdev->name), "%s lif",
	229	dev_name(vsp1->dev));
	230	v4l2_set_subdevdata(subdev, lif);
	231	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
	232
	233	vsp1_entity_init_formats(subdev, NULL);
	234
	235	return lif;
	236	}