[deliverable/linux.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 = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config,
					    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_subdev_pad_config *config;
		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;

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

		format = vsp1_entity_get_pad_format(&lif->entity, config,
						    LIF_PAD_SINK);
		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_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

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

	format = vsp1_entity_get_pad_format(&lif->entity, config, LIF_PAD_SINK);

	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);
	struct v4l2_subdev_pad_config *config;

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

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

	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_subdev_pad_config *config;
	struct v4l2_mbus_framefmt *format;

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

	/* 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, config, fmt->pad);

	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, config,
					    LIF_PAD_SOURCE);
	*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 = {
	.init_cfg = vsp1_entity_init_cfg,
	.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 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, "lif", 2, &lif_ops);
	if (ret < 0)
		return ERR_PTR(ret);

	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
e790c3cb LP	51	format = vsp1_entity_get_pad_format(&lif->entity, lif->entity.config,
e790c3cb LP	52	LIF_PAD_SOURCE);
26e0ca22 LP	53
	54	obth = min(obth, (format->width + 1) / 2 * format->height - 4);
	55
	56	vsp1_lif_write(lif, VI6_LIF_CSBTH,
	57	(hbth << VI6_LIF_CSBTH_HBTH_SHIFT) \|
	58	(lbth << VI6_LIF_CSBTH_LBTH_SHIFT));
	59
	60	vsp1_lif_write(lif, VI6_LIF_CTRL,
	61	(obth << VI6_LIF_CTRL_OBTH_SHIFT) \|
	62	(format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) \|
	63	VI6_LIF_CTRL_REQSEL \| VI6_LIF_CTRL_LIF_EN);
	64
	65	return 0;
	66	}
	67
	68	/* -----------------------------------------------------------------------------
	69	* V4L2 Subdevice Pad Operations
	70	*/
	71
	72	static int lif_enum_mbus_code(struct v4l2_subdev *subdev,
f7234138	73	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	74	struct v4l2_subdev_mbus_code_enum *code)
	75	{
	76	static const unsigned int codes[] = {
27ffaeb0 BB	77	MEDIA_BUS_FMT_ARGB8888_1X32,
27ffaeb0 BB	78	MEDIA_BUS_FMT_AYUV8_1X32,
26e0ca22	79	};
3f1ccf16	80	struct vsp1_lif *lif = to_lif(subdev);
26e0ca22 LP	81
	82	if (code->pad == LIF_PAD_SINK) {
	83	if (code->index >= ARRAY_SIZE(codes))
	84	return -EINVAL;
	85
	86	code->code = codes[code->index];
	87	} else {
e790c3cb	88	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	89	struct v4l2_mbus_framefmt *format;
	90
	91	/* The LIF can't perform format conversion, the sink format is
	92	* always identical to the source format.
	93	*/
	94	if (code->index)
	95	return -EINVAL;
	96
e790c3cb LP	97	config = vsp1_entity_get_pad_config(&lif->entity, cfg,
	98	code->which);
	99	if (!config)
	100	return -EINVAL;
	101
	102	format = vsp1_entity_get_pad_format(&lif->entity, config,
	103	LIF_PAD_SINK);
26e0ca22 LP	104	code->code = format->code;
	105	}
	106
	107	return 0;
	108	}
	109
	110	static int lif_enum_frame_size(struct v4l2_subdev *subdev,
f7234138	111	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	112	struct v4l2_subdev_frame_size_enum *fse)
26e0ca22 LP	113	{
5778e749	114	struct vsp1_lif *lif = to_lif(subdev);
e790c3cb	115	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	116	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	117
e790c3cb LP	118	config = vsp1_entity_get_pad_config(&lif->entity, cfg, fse->which);
	119	if (!config)
	120	return -EINVAL;
	121
	122	format = vsp1_entity_get_pad_format(&lif->entity, config, LIF_PAD_SINK);
26e0ca22 LP	123
	124	if (fse->index \|\| fse->code != format->code)
	125	return -EINVAL;
	126
	127	if (fse->pad == LIF_PAD_SINK) {
	128	fse->min_width = LIF_MIN_SIZE;
	129	fse->max_width = LIF_MAX_SIZE;
	130	fse->min_height = LIF_MIN_SIZE;
	131	fse->max_height = LIF_MAX_SIZE;
	132	} else {
	133	fse->min_width = format->width;
	134	fse->max_width = format->width;
	135	fse->min_height = format->height;
	136	fse->max_height = format->height;
	137	}
	138
	139	return 0;
	140	}
	141
1bd0a1bd LP	142	static int lif_get_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	143	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	144	struct v4l2_subdev_format *fmt)
	145	{
	146	struct vsp1_lif *lif = to_lif(subdev);
e790c3cb	147	struct v4l2_subdev_pad_config *config;
26e0ca22	148
e790c3cb LP	149	config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which);
	150	if (!config)
	151	return -EINVAL;
	152
	153	fmt->format = *vsp1_entity_get_pad_format(&lif->entity, config,
	154	fmt->pad);
26e0ca22 LP	155
	156	return 0;
	157	}
	158
1bd0a1bd LP	159	static int lif_set_format(struct v4l2_subdev *subdev,
1bd0a1bd LP	160	struct v4l2_subdev_pad_config *cfg,
26e0ca22 LP	161	struct v4l2_subdev_format *fmt)
	162	{
	163	struct vsp1_lif *lif = to_lif(subdev);
e790c3cb	164	struct v4l2_subdev_pad_config *config;
26e0ca22 LP	165	struct v4l2_mbus_framefmt *format;
26e0ca22 LP	166
e790c3cb LP	167	config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which);
	168	if (!config)
	169	return -EINVAL;
	170
26e0ca22	171	/* Default to YUV if the requested format is not supported. */
27ffaeb0 BB	172	if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
	173	fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
	174	fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
26e0ca22	175
e790c3cb	176	format = vsp1_entity_get_pad_format(&lif->entity, config, fmt->pad);
26e0ca22 LP	177
	178	if (fmt->pad == LIF_PAD_SOURCE) {
	179	/* The LIF source format is always identical to its sink
	180	* format.
	181	*/
	182	fmt->format = *format;
	183	return 0;
	184	}
	185
	186	format->code = fmt->format.code;
	187	format->width = clamp_t(unsigned int, fmt->format.width,
	188	LIF_MIN_SIZE, LIF_MAX_SIZE);
	189	format->height = clamp_t(unsigned int, fmt->format.height,
	190	LIF_MIN_SIZE, LIF_MAX_SIZE);
	191	format->field = V4L2_FIELD_NONE;
	192	format->colorspace = V4L2_COLORSPACE_SRGB;
	193
	194	fmt->format = *format;
	195
	196	/* Propagate the format to the source pad. */
e790c3cb LP	197	format = vsp1_entity_get_pad_format(&lif->entity, config,
e790c3cb LP	198	LIF_PAD_SOURCE);
26e0ca22 LP	199	*format = fmt->format;
	200
	201	return 0;
	202	}
	203
	204	/* -----------------------------------------------------------------------------
	205	* V4L2 Subdevice Operations
	206	*/
	207
	208	static struct v4l2_subdev_video_ops lif_video_ops = {
	209	.s_stream = lif_s_stream,
	210	};
	211
	212	static struct v4l2_subdev_pad_ops lif_pad_ops = {
0efdf0f5	213	.init_cfg = vsp1_entity_init_cfg,
26e0ca22 LP	214	.enum_mbus_code = lif_enum_mbus_code,
	215	.enum_frame_size = lif_enum_frame_size,
	216	.get_fmt = lif_get_format,
	217	.set_fmt = lif_set_format,
	218	};
	219
	220	static struct v4l2_subdev_ops lif_ops = {
	221	.video = &lif_video_ops,
	222	.pad = &lif_pad_ops,
	223	};
	224
	225	/* -----------------------------------------------------------------------------
	226	* Initialization and Cleanup
	227	*/
	228
	229	struct vsp1_lif vsp1_lif_create(struct vsp1_device vsp1)
	230	{
26e0ca22 LP	231	struct vsp1_lif *lif;
	232	int ret;
	233
	234	lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL);
	235	if (lif == NULL)
	236	return ERR_PTR(-ENOMEM);
	237
	238	lif->entity.type = VSP1_ENTITY_LIF;
26e0ca22	239
823329df	240	ret = vsp1_entity_init(vsp1, &lif->entity, "lif", 2, &lif_ops);
26e0ca22 LP	241	if (ret < 0)
	242	return ERR_PTR(ret);
	243
26e0ca22 LP	244	return lif;
26e0ca22 LP	245	}