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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 | ||
29 | static inline u32 vsp1_lif_read(struct vsp1_lif *lif, u32 reg) | |
30 | { | |
31 | return vsp1_read(lif->entity.vsp1, reg); | |
32 | } | |
33 | ||
34 | static inline void vsp1_lif_write(struct vsp1_lif *lif, u32 reg, u32 data) | |
35 | { | |
36 | vsp1_write(lif->entity.vsp1, reg, data); | |
37 | } | |
38 | ||
39 | /* ----------------------------------------------------------------------------- | |
40 | * V4L2 Subdevice Core Operations | |
41 | */ | |
42 | ||
43 | static int lif_s_stream(struct v4l2_subdev *subdev, int enable) | |
44 | { | |
45 | const struct v4l2_mbus_framefmt *format; | |
46 | struct vsp1_lif *lif = to_lif(subdev); | |
47 | unsigned int hbth = 1300; | |
48 | unsigned int obth = 400; | |
49 | unsigned int lbth = 200; | |
50 | ||
51 | if (!enable) { | |
52 | vsp1_lif_write(lif, VI6_LIF_CTRL, 0); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | format = &lif->entity.formats[LIF_PAD_SOURCE]; | |
57 | ||
58 | obth = min(obth, (format->width + 1) / 2 * format->height - 4); | |
59 | ||
60 | vsp1_lif_write(lif, VI6_LIF_CSBTH, | |
61 | (hbth << VI6_LIF_CSBTH_HBTH_SHIFT) | | |
62 | (lbth << VI6_LIF_CSBTH_LBTH_SHIFT)); | |
63 | ||
64 | vsp1_lif_write(lif, VI6_LIF_CTRL, | |
65 | (obth << VI6_LIF_CTRL_OBTH_SHIFT) | | |
66 | (format->code == 0 ? VI6_LIF_CTRL_CFMT : 0) | | |
67 | VI6_LIF_CTRL_REQSEL | VI6_LIF_CTRL_LIF_EN); | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | /* ----------------------------------------------------------------------------- | |
73 | * V4L2 Subdevice Pad Operations | |
74 | */ | |
75 | ||
76 | static int lif_enum_mbus_code(struct v4l2_subdev *subdev, | |
77 | struct v4l2_subdev_fh *fh, | |
78 | struct v4l2_subdev_mbus_code_enum *code) | |
79 | { | |
80 | static const unsigned int codes[] = { | |
27ffaeb0 BB |
81 | MEDIA_BUS_FMT_ARGB8888_1X32, |
82 | MEDIA_BUS_FMT_AYUV8_1X32, | |
26e0ca22 LP |
83 | }; |
84 | ||
85 | if (code->pad == LIF_PAD_SINK) { | |
86 | if (code->index >= ARRAY_SIZE(codes)) | |
87 | return -EINVAL; | |
88 | ||
89 | code->code = codes[code->index]; | |
90 | } else { | |
91 | struct v4l2_mbus_framefmt *format; | |
92 | ||
93 | /* The LIF can't perform format conversion, the sink format is | |
94 | * always identical to the source format. | |
95 | */ | |
96 | if (code->index) | |
97 | return -EINVAL; | |
98 | ||
99 | format = v4l2_subdev_get_try_format(fh, LIF_PAD_SINK); | |
100 | code->code = format->code; | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static int lif_enum_frame_size(struct v4l2_subdev *subdev, | |
107 | struct v4l2_subdev_fh *fh, | |
108 | struct v4l2_subdev_frame_size_enum *fse) | |
109 | { | |
110 | struct v4l2_mbus_framefmt *format; | |
111 | ||
112 | format = v4l2_subdev_get_try_format(fh, LIF_PAD_SINK); | |
113 | ||
114 | if (fse->index || fse->code != format->code) | |
115 | return -EINVAL; | |
116 | ||
117 | if (fse->pad == LIF_PAD_SINK) { | |
118 | fse->min_width = LIF_MIN_SIZE; | |
119 | fse->max_width = LIF_MAX_SIZE; | |
120 | fse->min_height = LIF_MIN_SIZE; | |
121 | fse->max_height = LIF_MAX_SIZE; | |
122 | } else { | |
123 | fse->min_width = format->width; | |
124 | fse->max_width = format->width; | |
125 | fse->min_height = format->height; | |
126 | fse->max_height = format->height; | |
127 | } | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | static int lif_get_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, | |
133 | struct v4l2_subdev_format *fmt) | |
134 | { | |
135 | struct vsp1_lif *lif = to_lif(subdev); | |
136 | ||
137 | fmt->format = *vsp1_entity_get_pad_format(&lif->entity, fh, fmt->pad, | |
138 | fmt->which); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static int lif_set_format(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh, | |
144 | struct v4l2_subdev_format *fmt) | |
145 | { | |
146 | struct vsp1_lif *lif = to_lif(subdev); | |
147 | struct v4l2_mbus_framefmt *format; | |
148 | ||
149 | /* Default to YUV if the requested format is not supported. */ | |
27ffaeb0 BB |
150 | if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 && |
151 | fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32) | |
152 | fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32; | |
26e0ca22 LP |
153 | |
154 | format = vsp1_entity_get_pad_format(&lif->entity, fh, fmt->pad, | |
155 | fmt->which); | |
156 | ||
157 | if (fmt->pad == LIF_PAD_SOURCE) { | |
158 | /* The LIF source format is always identical to its sink | |
159 | * format. | |
160 | */ | |
161 | fmt->format = *format; | |
162 | return 0; | |
163 | } | |
164 | ||
165 | format->code = fmt->format.code; | |
166 | format->width = clamp_t(unsigned int, fmt->format.width, | |
167 | LIF_MIN_SIZE, LIF_MAX_SIZE); | |
168 | format->height = clamp_t(unsigned int, fmt->format.height, | |
169 | LIF_MIN_SIZE, LIF_MAX_SIZE); | |
170 | format->field = V4L2_FIELD_NONE; | |
171 | format->colorspace = V4L2_COLORSPACE_SRGB; | |
172 | ||
173 | fmt->format = *format; | |
174 | ||
175 | /* Propagate the format to the source pad. */ | |
176 | format = vsp1_entity_get_pad_format(&lif->entity, fh, LIF_PAD_SOURCE, | |
177 | fmt->which); | |
178 | *format = fmt->format; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /* ----------------------------------------------------------------------------- | |
184 | * V4L2 Subdevice Operations | |
185 | */ | |
186 | ||
187 | static struct v4l2_subdev_video_ops lif_video_ops = { | |
188 | .s_stream = lif_s_stream, | |
189 | }; | |
190 | ||
191 | static struct v4l2_subdev_pad_ops lif_pad_ops = { | |
192 | .enum_mbus_code = lif_enum_mbus_code, | |
193 | .enum_frame_size = lif_enum_frame_size, | |
194 | .get_fmt = lif_get_format, | |
195 | .set_fmt = lif_set_format, | |
196 | }; | |
197 | ||
198 | static struct v4l2_subdev_ops lif_ops = { | |
199 | .video = &lif_video_ops, | |
200 | .pad = &lif_pad_ops, | |
201 | }; | |
202 | ||
203 | /* ----------------------------------------------------------------------------- | |
204 | * Initialization and Cleanup | |
205 | */ | |
206 | ||
207 | struct vsp1_lif *vsp1_lif_create(struct vsp1_device *vsp1) | |
208 | { | |
209 | struct v4l2_subdev *subdev; | |
210 | struct vsp1_lif *lif; | |
211 | int ret; | |
212 | ||
213 | lif = devm_kzalloc(vsp1->dev, sizeof(*lif), GFP_KERNEL); | |
214 | if (lif == NULL) | |
215 | return ERR_PTR(-ENOMEM); | |
216 | ||
217 | lif->entity.type = VSP1_ENTITY_LIF; | |
26e0ca22 LP |
218 | |
219 | ret = vsp1_entity_init(vsp1, &lif->entity, 2); | |
220 | if (ret < 0) | |
221 | return ERR_PTR(ret); | |
222 | ||
223 | /* Initialize the V4L2 subdev. */ | |
224 | subdev = &lif->entity.subdev; | |
225 | v4l2_subdev_init(subdev, &lif_ops); | |
226 | ||
227 | subdev->entity.ops = &vsp1_media_ops; | |
228 | subdev->internal_ops = &vsp1_subdev_internal_ops; | |
229 | snprintf(subdev->name, sizeof(subdev->name), "%s lif", | |
230 | dev_name(vsp1->dev)); | |
231 | v4l2_set_subdevdata(subdev, lif); | |
232 | subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; | |
233 | ||
234 | vsp1_entity_init_formats(subdev, NULL); | |
235 | ||
236 | return lif; | |
237 | } |