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
vsp1_hsit_write(struct vsp1_hsit * hsit,struct vsp1_dl_body * dlb,u32 reg,u32 data)26 static 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
hsit_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)36 static int hsit_enum_mbus_code(struct v4l2_subdev *subdev,
37 struct v4l2_subdev_state *sd_state,
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
hsit_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)54 static int hsit_enum_frame_size(struct v4l2_subdev *subdev,
55 struct v4l2_subdev_state *sd_state,
56 struct v4l2_subdev_frame_size_enum *fse)
57 {
58 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
59 HSIT_MIN_SIZE,
60 HSIT_MIN_SIZE, HSIT_MAX_SIZE,
61 HSIT_MAX_SIZE);
62 }
63
hsit_set_format(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)64 static int hsit_set_format(struct v4l2_subdev *subdev,
65 struct v4l2_subdev_state *sd_state,
66 struct v4l2_subdev_format *fmt)
67 {
68 struct vsp1_hsit *hsit = to_hsit(subdev);
69 struct v4l2_subdev_state *config;
70 struct v4l2_mbus_framefmt *format;
71 int ret = 0;
72
73 mutex_lock(&hsit->entity.lock);
74
75 config = vsp1_entity_get_pad_config(&hsit->entity, sd_state,
76 fmt->which);
77 if (!config) {
78 ret = -EINVAL;
79 goto done;
80 }
81
82 format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
83
84 if (fmt->pad == HSIT_PAD_SOURCE) {
85 /*
86 * The HST and HSI output format code and resolution can't be
87 * modified.
88 */
89 fmt->format = *format;
90 goto done;
91 }
92
93 format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
94 : MEDIA_BUS_FMT_ARGB8888_1X32;
95 format->width = clamp_t(unsigned int, fmt->format.width,
96 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
97 format->height = clamp_t(unsigned int, fmt->format.height,
98 HSIT_MIN_SIZE, HSIT_MAX_SIZE);
99 format->field = V4L2_FIELD_NONE;
100 format->colorspace = V4L2_COLORSPACE_SRGB;
101
102 fmt->format = *format;
103
104 /* Propagate the format to the source pad. */
105 format = vsp1_entity_get_pad_format(&hsit->entity, config,
106 HSIT_PAD_SOURCE);
107 *format = fmt->format;
108 format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
109 : MEDIA_BUS_FMT_AHSV8888_1X32;
110
111 done:
112 mutex_unlock(&hsit->entity.lock);
113 return ret;
114 }
115
116 static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
117 .init_cfg = vsp1_entity_init_cfg,
118 .enum_mbus_code = hsit_enum_mbus_code,
119 .enum_frame_size = hsit_enum_frame_size,
120 .get_fmt = vsp1_subdev_get_pad_format,
121 .set_fmt = hsit_set_format,
122 };
123
124 static const struct v4l2_subdev_ops hsit_ops = {
125 .pad = &hsit_pad_ops,
126 };
127
128 /* -----------------------------------------------------------------------------
129 * VSP1 Entity Operations
130 */
131
hsit_configure_stream(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)132 static void hsit_configure_stream(struct vsp1_entity *entity,
133 struct vsp1_pipeline *pipe,
134 struct vsp1_dl_list *dl,
135 struct vsp1_dl_body *dlb)
136 {
137 struct vsp1_hsit *hsit = to_hsit(&entity->subdev);
138
139 if (hsit->inverse)
140 vsp1_hsit_write(hsit, dlb, VI6_HSI_CTRL, VI6_HSI_CTRL_EN);
141 else
142 vsp1_hsit_write(hsit, dlb, VI6_HST_CTRL, VI6_HST_CTRL_EN);
143 }
144
145 static const struct vsp1_entity_operations hsit_entity_ops = {
146 .configure_stream = hsit_configure_stream,
147 };
148
149 /* -----------------------------------------------------------------------------
150 * Initialization and Cleanup
151 */
152
vsp1_hsit_create(struct vsp1_device * vsp1,bool inverse)153 struct vsp1_hsit *vsp1_hsit_create(struct vsp1_device *vsp1, bool inverse)
154 {
155 struct vsp1_hsit *hsit;
156 int ret;
157
158 hsit = devm_kzalloc(vsp1->dev, sizeof(*hsit), GFP_KERNEL);
159 if (hsit == NULL)
160 return ERR_PTR(-ENOMEM);
161
162 hsit->inverse = inverse;
163
164 hsit->entity.ops = &hsit_entity_ops;
165
166 if (inverse)
167 hsit->entity.type = VSP1_ENTITY_HSI;
168 else
169 hsit->entity.type = VSP1_ENTITY_HST;
170
171 ret = vsp1_entity_init(vsp1, &hsit->entity, inverse ? "hsi" : "hst",
172 2, &hsit_ops,
173 MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV);
174 if (ret < 0)
175 return ERR_PTR(ret);
176
177 return hsit;
178 }
179