1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * vsp1_clu.c -- R-Car VSP1 Cubic Look-Up Table
4 *
5 * Copyright (C) 2015-2016 Renesas Electronics Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <linux/device.h>
11 #include <linux/slab.h>
12
13 #include <media/v4l2-subdev.h>
14
15 #include "vsp1.h"
16 #include "vsp1_clu.h"
17 #include "vsp1_dl.h"
18
19 #define CLU_MIN_SIZE 4U
20 #define CLU_MAX_SIZE 8190U
21
22 #define CLU_SIZE (17 * 17 * 17)
23
24 /* -----------------------------------------------------------------------------
25 * Device Access
26 */
27
vsp1_clu_write(struct vsp1_clu * clu,struct vsp1_dl_body * dlb,u32 reg,u32 data)28 static inline void vsp1_clu_write(struct vsp1_clu *clu,
29 struct vsp1_dl_body *dlb, u32 reg, u32 data)
30 {
31 vsp1_dl_body_write(dlb, reg, data);
32 }
33
34 /* -----------------------------------------------------------------------------
35 * Controls
36 */
37
38 #define V4L2_CID_VSP1_CLU_TABLE (V4L2_CID_USER_BASE | 0x1001)
39 #define V4L2_CID_VSP1_CLU_MODE (V4L2_CID_USER_BASE | 0x1002)
40 #define V4L2_CID_VSP1_CLU_MODE_2D 0
41 #define V4L2_CID_VSP1_CLU_MODE_3D 1
42
clu_set_table(struct vsp1_clu * clu,struct v4l2_ctrl * ctrl)43 static int clu_set_table(struct vsp1_clu *clu, struct v4l2_ctrl *ctrl)
44 {
45 struct vsp1_dl_body *dlb;
46 unsigned int i;
47
48 dlb = vsp1_dl_body_get(clu->pool);
49 if (!dlb)
50 return -ENOMEM;
51
52 vsp1_dl_body_write(dlb, VI6_CLU_ADDR, 0);
53 for (i = 0; i < CLU_SIZE; ++i)
54 vsp1_dl_body_write(dlb, VI6_CLU_DATA, ctrl->p_new.p_u32[i]);
55
56 spin_lock_irq(&clu->lock);
57 swap(clu->clu, dlb);
58 spin_unlock_irq(&clu->lock);
59
60 vsp1_dl_body_put(dlb);
61 return 0;
62 }
63
clu_s_ctrl(struct v4l2_ctrl * ctrl)64 static int clu_s_ctrl(struct v4l2_ctrl *ctrl)
65 {
66 struct vsp1_clu *clu =
67 container_of(ctrl->handler, struct vsp1_clu, ctrls);
68
69 switch (ctrl->id) {
70 case V4L2_CID_VSP1_CLU_TABLE:
71 clu_set_table(clu, ctrl);
72 break;
73
74 case V4L2_CID_VSP1_CLU_MODE:
75 clu->mode = ctrl->val;
76 break;
77 }
78
79 return 0;
80 }
81
82 static const struct v4l2_ctrl_ops clu_ctrl_ops = {
83 .s_ctrl = clu_s_ctrl,
84 };
85
86 static const struct v4l2_ctrl_config clu_table_control = {
87 .ops = &clu_ctrl_ops,
88 .id = V4L2_CID_VSP1_CLU_TABLE,
89 .name = "Look-Up Table",
90 .type = V4L2_CTRL_TYPE_U32,
91 .min = 0x00000000,
92 .max = 0x00ffffff,
93 .step = 1,
94 .def = 0,
95 .dims = { 17, 17, 17 },
96 };
97
98 static const char * const clu_mode_menu[] = {
99 "2D",
100 "3D",
101 NULL,
102 };
103
104 static const struct v4l2_ctrl_config clu_mode_control = {
105 .ops = &clu_ctrl_ops,
106 .id = V4L2_CID_VSP1_CLU_MODE,
107 .name = "Mode",
108 .type = V4L2_CTRL_TYPE_MENU,
109 .min = 0,
110 .max = 1,
111 .def = 1,
112 .qmenu = clu_mode_menu,
113 };
114
115 /* -----------------------------------------------------------------------------
116 * V4L2 Subdevice Pad Operations
117 */
118
119 static const unsigned int clu_codes[] = {
120 MEDIA_BUS_FMT_ARGB8888_1X32,
121 MEDIA_BUS_FMT_AHSV8888_1X32,
122 MEDIA_BUS_FMT_AYUV8_1X32,
123 };
124
clu_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)125 static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
126 struct v4l2_subdev_state *sd_state,
127 struct v4l2_subdev_mbus_code_enum *code)
128 {
129 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, clu_codes,
130 ARRAY_SIZE(clu_codes));
131 }
132
clu_enum_frame_size(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)133 static int clu_enum_frame_size(struct v4l2_subdev *subdev,
134 struct v4l2_subdev_state *sd_state,
135 struct v4l2_subdev_frame_size_enum *fse)
136 {
137 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
138 CLU_MIN_SIZE,
139 CLU_MIN_SIZE, CLU_MAX_SIZE,
140 CLU_MAX_SIZE);
141 }
142
clu_set_format(struct v4l2_subdev * subdev,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)143 static int clu_set_format(struct v4l2_subdev *subdev,
144 struct v4l2_subdev_state *sd_state,
145 struct v4l2_subdev_format *fmt)
146 {
147 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, clu_codes,
148 ARRAY_SIZE(clu_codes),
149 CLU_MIN_SIZE, CLU_MIN_SIZE,
150 CLU_MAX_SIZE, CLU_MAX_SIZE);
151 }
152
153 /* -----------------------------------------------------------------------------
154 * V4L2 Subdevice Operations
155 */
156
157 static const struct v4l2_subdev_pad_ops clu_pad_ops = {
158 .enum_mbus_code = clu_enum_mbus_code,
159 .enum_frame_size = clu_enum_frame_size,
160 .get_fmt = vsp1_subdev_get_pad_format,
161 .set_fmt = clu_set_format,
162 };
163
164 static const struct v4l2_subdev_ops clu_ops = {
165 .pad = &clu_pad_ops,
166 };
167
168 /* -----------------------------------------------------------------------------
169 * VSP1 Entity Operations
170 */
171
clu_configure_stream(struct vsp1_entity * entity,struct v4l2_subdev_state * state,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)172 static void clu_configure_stream(struct vsp1_entity *entity,
173 struct v4l2_subdev_state *state,
174 struct vsp1_pipeline *pipe,
175 struct vsp1_dl_list *dl,
176 struct vsp1_dl_body *dlb)
177 {
178 struct vsp1_clu *clu = to_clu(&entity->subdev);
179 struct v4l2_mbus_framefmt *format;
180
181 /*
182 * The yuv_mode can't be changed during streaming. Cache it internally
183 * for future runtime configuration calls.
184 */
185 format = v4l2_subdev_state_get_format(state, CLU_PAD_SINK);
186 clu->yuv_mode = format->code == MEDIA_BUS_FMT_AYUV8_1X32;
187 }
188
clu_configure_frame(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)189 static void clu_configure_frame(struct vsp1_entity *entity,
190 struct vsp1_pipeline *pipe,
191 struct vsp1_dl_list *dl,
192 struct vsp1_dl_body *dlb)
193 {
194 struct vsp1_clu *clu = to_clu(&entity->subdev);
195 struct vsp1_dl_body *clu_dlb;
196 unsigned long flags;
197 u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
198
199 /* 2D mode can only be used with the YCbCr pixel encoding. */
200 if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D && clu->yuv_mode)
201 ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
202 | VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
203 | VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
204
205 vsp1_clu_write(clu, dlb, VI6_CLU_CTRL, ctrl);
206
207 spin_lock_irqsave(&clu->lock, flags);
208 clu_dlb = clu->clu;
209 clu->clu = NULL;
210 spin_unlock_irqrestore(&clu->lock, flags);
211
212 if (clu_dlb) {
213 vsp1_dl_list_add_body(dl, clu_dlb);
214
215 /* Release our local reference. */
216 vsp1_dl_body_put(clu_dlb);
217 }
218 }
219
clu_destroy(struct vsp1_entity * entity)220 static void clu_destroy(struct vsp1_entity *entity)
221 {
222 struct vsp1_clu *clu = to_clu(&entity->subdev);
223
224 vsp1_dl_body_pool_destroy(clu->pool);
225 }
226
227 static const struct vsp1_entity_operations clu_entity_ops = {
228 .configure_stream = clu_configure_stream,
229 .configure_frame = clu_configure_frame,
230 .destroy = clu_destroy,
231 };
232
233 /* -----------------------------------------------------------------------------
234 * Initialization and Cleanup
235 */
236
vsp1_clu_create(struct vsp1_device * vsp1)237 struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
238 {
239 struct vsp1_clu *clu;
240 int ret;
241
242 clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
243 if (clu == NULL)
244 return ERR_PTR(-ENOMEM);
245
246 spin_lock_init(&clu->lock);
247
248 clu->entity.ops = &clu_entity_ops;
249 clu->entity.type = VSP1_ENTITY_CLU;
250
251 ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
252 MEDIA_ENT_F_PROC_VIDEO_LUT);
253 if (ret < 0)
254 return ERR_PTR(ret);
255
256 /*
257 * Pre-allocate a body pool, with 3 bodies allowing a userspace update
258 * before the hardware has committed a previous set of tables, handling
259 * both the queued and pending dl entries. One extra entry is added to
260 * the CLU_SIZE to allow for the VI6_CLU_ADDR header.
261 */
262 clu->pool = vsp1_dl_body_pool_create(clu->entity.vsp1, 3, CLU_SIZE + 1,
263 0);
264 if (!clu->pool)
265 return ERR_PTR(-ENOMEM);
266
267 /* Initialize the control handler. */
268 v4l2_ctrl_handler_init(&clu->ctrls, 2);
269 v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
270 v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
271
272 clu->entity.subdev.ctrl_handler = &clu->ctrls;
273
274 if (clu->ctrls.error) {
275 dev_err(vsp1->dev, "clu: failed to initialize controls\n");
276 ret = clu->ctrls.error;
277 vsp1_entity_destroy(&clu->entity);
278 return ERR_PTR(ret);
279 }
280
281 v4l2_ctrl_handler_setup(&clu->ctrls);
282
283 return clu;
284 }
285