1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * vsp1_hsit.c  --  R-Car VSP1 Hue Saturation value (Inverse) Transform
4 *
5 * Copyright (C) 2013 Renesas Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10#include <linux/device.h>
11#include <linux/gfp.h>
12
13#include <media/v4l2-subdev.h>
14
15#include "vsp1.h"
16#include "vsp1_dl.h"
17#include "vsp1_hsit.h"
18
19#define HSIT_MIN_SIZE				4U
20#define HSIT_MAX_SIZE				8190U
21
22/* -----------------------------------------------------------------------------
23 * Device Access
24 */
25
26static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
27				   struct vsp1_dl_body *dlb, u32 reg, u32 data)
28{
29	vsp1_dl_body_write(dlb, reg, data);
30}
31
32/* -----------------------------------------------------------------------------
33 * V4L2 Subdevice Operations
34 */
35
36static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
37			       struct v4l2_subdev_pad_config *cfg,
38			       struct v4l2_subdev_mbus_code_enum *code)
39{
40	struct vsp1_hsit *hsit = to_hsit(subdev);
41
42	if (code->index > 0)
43		return -EINVAL;
44
45	if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
46	    (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
47		code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
48	else
49		code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
50
51	return 0;
52}
53
54static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
55				struct v4l2_subdev_pad_config *cfg,
56				struct v4l2_subdev_frame_size_enum *fse)
57{
58	return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HSIT_MIN_SIZE,
59					   HSIT_MIN_SIZE, HSIT_MAX_SIZE,
60					   HSIT_MAX_SIZE);
61}
62
63static int hsit_set_format(struct v4l2_subdev *subdev,
64			   struct v4l2_subdev_pad_config *cfg,
65			   struct v4l2_subdev_format *fmt)
66{
67	struct vsp1_hsit *hsit = to_hsit(subdev);
68	struct v4l2_subdev_pad_config *config;
69	struct v4l2_mbus_framefmt *format;
70	int ret = 0;
71
72	mutex_lock(&hsit->entity.lock);
73
74	config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
75	if (!config) {
76		ret = -EINVAL;
77		goto done;
78	}
79
80	format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
81
82	if (fmt->pad == HSIT_PAD_SOURCE) {
83		/*
84		 * The HST and HSI output format code and resolution can't be
85		 * modified.
86		 */
87		fmt->format = *format;
88		goto done;
89	}
90
91	format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
92		     : MEDIA_BUS_FMT_ARGB8888_1X32;
93	format->width = clamp_t(unsigned int, fmt->format.width,
94				HSIT_MIN_SIZE, HSIT_MAX_SIZE);
95	format->height = clamp_t(unsigned int, fmt->format.height,
96				 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
97	format->field = V4L2_FIELD_NONE;
98	format->colorspace = V4L2_COLORSPACE_SRGB;
99
100	fmt->format = *format;
101
102	/* Propagate the format to the source pad. */
103	format = vsp1_entity_get_pad_format(&hsit->entity, config,
104					    HSIT_PAD_SOURCE);
105	*format = fmt->format;
106	format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
107		     : MEDIA_BUS_FMT_AHSV8888_1X32;
108
109done:
110	mutex_unlock(&hsit->entity.lock);
111	return ret;
112}
113
114static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
115	.init_cfg = vsp1_entity_init_cfg,
116	.enum_mbus_code = hsit_enum_mbus_code,
117	.enum_frame_size = hsit_enum_frame_size,
118	.get_fmt = vsp1_subdev_get_pad_format,
119	.set_fmt = hsit_set_format,
120};
121
122static const struct v4l2_subdev_ops hsit_ops = {
123	.pad    = &hsit_pad_ops,
124};
125
126/* -----------------------------------------------------------------------------
127 * VSP1 Entity Operations
128 */
129
130static void hsit_configure_stream(struct vsp1_entity *entity,
131				  struct vsp1_pipeline *pipe,
132				  struct vsp1_dl_list *dl,
133				  struct vsp1_dl_body *dlb)
134{
135	struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
136
137	if (hsit->inverse)
138		vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
139	else
140		vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
141}
142
143static const struct vsp1_entity_operations hsit_entity_ops = {
144	.configure_stream = hsit_configure_stream,
145};
146
147/* -----------------------------------------------------------------------------
148 * Initialization and Cleanup
149 */
150
151struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
152{
153	struct vsp1_hsit *hsit;
154	int ret;
155
156	hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
157	if (hsit == NULL)
158		return ERR_PTR(-ENOMEM);
159
160	hsit->inverse = inverse;
161
162	hsit->entity.ops = &hsit_entity_ops;
163
164	if (inverse)
165		hsit->entity.type = VSP1_ENTITY_HSI;
166	else
167		hsit->entity.type = VSP1_ENTITY_HST;
168
169	ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
170			       2, &hsit_ops,
171			       MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
172	if (ret < 0)
173		return ERR_PTR(ret);
174
175	return hsit;
176}
177