1 /*
2 * vsp1_hsit.c -- R-Car VSP1 Hue Saturation value (Inverse) Transform
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_dl.h"
21 #include "vsp1_hsit.h"
22
23 #define HSIT_MIN_SIZE 4U
24 #define HSIT_MAX_SIZE 8190U
25
26 /* -----------------------------------------------------------------------------
27 * Device Access
28 */
29
vsp1_hsit_write(struct vsp1_hsit * hsit,struct vsp1_dl_list * dl,u32 reg,u32 data)30 static inline void vsp1_hsit_write(struct vsp1_hsit *hsit,
31 struct vsp1_dl_list *dl, u32 reg, u32 data)
32 {
33 vsp1_dl_list_write(dl, reg, data);
34 }
35
36 /* -----------------------------------------------------------------------------
37 * V4L2 Subdevice Operations
38 */
39
hsit_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)40 static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
41 struct v4l2_subdev_pad_config *cfg,
42 struct v4l2_subdev_mbus_code_enum *code)
43 {
44 struct vsp1_hsit *hsit = to_hsit(subdev);
45
46 if (code->index > 0)
47 return -EINVAL;
48
49 if ((code->pad == HSIT_PAD_SINK && !hsit->inverse) |
50 (code->pad == HSIT_PAD_SOURCE && hsit->inverse))
51 code->code = MEDIA_BUS_FMT_ARGB8888_1X32;
52 else
53 code->code = MEDIA_BUS_FMT_AHSV8888_1X32;
54
55 return 0;
56 }
57
hsit_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)58 static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
59 struct v4l2_subdev_pad_config *cfg,
60 struct v4l2_subdev_frame_size_enum *fse)
61 {
62 return vsp1_subdev_enum_frame_size(subdev, cfg, fse, HSIT_MIN_SIZE,
63 HSIT_MIN_SIZE, HSIT_MAX_SIZE,
64 HSIT_MAX_SIZE);
65 }
66
hsit_set_format(struct v4l2_subdev * subdev,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * fmt)67 static int hsit_set_format(struct v4l2_subdev *subdev,
68 struct v4l2_subdev_pad_config *cfg,
69 struct v4l2_subdev_format *fmt)
70 {
71 struct vsp1_hsit *hsit = to_hsit(subdev);
72 struct v4l2_subdev_pad_config *config;
73 struct v4l2_mbus_framefmt *format;
74 int ret = 0;
75
76 mutex_lock(&hsit->entity.lock);
77
78 config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
79 if (!config) {
80 ret = -EINVAL;
81 goto done;
82 }
83
84 format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
85
86 if (fmt->pad == HSIT_PAD_SOURCE) {
87 /* The HST and HSI output format code and resolution can't be
88 * modified.
89 */
90 fmt->format = *format;
91 goto done;
92 }
93
94 format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
95 : MEDIA_BUS_FMT_ARGB8888_1X32;
96 format->width = clamp_t(unsigned int, fmt->format.width,
97 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
98 format->height = clamp_t(unsigned int, fmt->format.height,
99 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
100 format->field = V4L2_FIELD_NONE;
101 format->colorspace = V4L2_COLORSPACE_SRGB;
102
103 fmt->format = *format;
104
105 /* Propagate the format to the source pad. */
106 format = vsp1_entity_get_pad_format(&hsit->entity, config,
107 HSIT_PAD_SOURCE);
108 *format = fmt->format;
109 format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
110 : MEDIA_BUS_FMT_AHSV8888_1X32;
111
112 done:
113 mutex_unlock(&hsit->entity.lock);
114 return ret;
115 }
116
117 static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
118 .init_cfg = vsp1_entity_init_cfg,
119 .enum_mbus_code = hsit_enum_mbus_code,
120 .enum_frame_size = hsit_enum_frame_size,
121 .get_fmt = vsp1_subdev_get_pad_format,
122 .set_fmt = hsit_set_format,
123 };
124
125 static const struct v4l2_subdev_ops hsit_ops = {
126 .pad = &hsit_pad_ops,
127 };
128
129 /* -----------------------------------------------------------------------------
130 * VSP1 Entity Operations
131 */
132
hsit_configure(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,enum vsp1_entity_params params)133 static void hsit_configure(struct vsp1_entity *entity,
134 struct vsp1_pipeline *pipe,
135 struct vsp1_dl_list *dl,
136 enum vsp1_entity_params params)
137 {
138 struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
139
140 if (params != VSP1_ENTITY_PARAMS_INIT)
141 return;
142
143 if (hsit->inverse)
144 vsp1_hsit_write(hsit, dl, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
145 else
146 vsp1_hsit_write(hsit, dl, VI6_HST_CTRL, VI6_HST_CTRL_EN);
147 }
148
149 static const struct vsp1_entity_operations hsit_entity_ops = {
150 .configure = hsit_configure,
151 };
152
153 /* -----------------------------------------------------------------------------
154 * Initialization and Cleanup
155 */
156
vsp1_hsit_create(struct vsp1_device * vsp1,bool inverse)157 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
158 {
159 struct vsp1_hsit *hsit;
160 int ret;
161
162 hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
163 if (hsit == NULL)
164 return ERR_PTR(-ENOMEM);
165
166 hsit->inverse = inverse;
167
168 hsit->entity.ops = &hsit_entity_ops;
169
170 if (inverse)
171 hsit->entity.type = VSP1_ENTITY_HSI;
172 else
173 hsit->entity.type = VSP1_ENTITY_HST;
174
175 ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
176 2, &hsit_ops,
177 MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
178 if (ret < 0)
179 return ERR_PTR(ret);
180
181 return hsit;
182 }
183