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 	.init_cfg = vsp1_entity_init_cfg,
159 	.enum_mbus_code = clu_enum_mbus_code,
160 	.enum_frame_size = clu_enum_frame_size,
161 	.get_fmt = vsp1_subdev_get_pad_format,
162 	.set_fmt = clu_set_format,
163 };
164 
165 static const struct v4l2_subdev_ops clu_ops = {
166 	.pad    = &clu_pad_ops,
167 };
168 
169 /* -----------------------------------------------------------------------------
170  * VSP1 Entity Operations
171  */
172 
clu_configure_stream(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)173 static void clu_configure_stream(struct vsp1_entity *entity,
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 = vsp1_entity_get_pad_format(&clu->entity,
186 					    clu->entity.config,
187 					    CLU_PAD_SINK);
188 	clu->yuv_mode = format->code == MEDIA_BUS_FMT_AYUV8_1X32;
189 }
190 
clu_configure_frame(struct vsp1_entity * entity,struct vsp1_pipeline * pipe,struct vsp1_dl_list * dl,struct vsp1_dl_body * dlb)191 static void clu_configure_frame(struct vsp1_entity *entity,
192 				struct vsp1_pipeline *pipe,
193 				struct vsp1_dl_list *dl,
194 				struct vsp1_dl_body *dlb)
195 {
196 	struct vsp1_clu *clu = to_clu(&entity->subdev);
197 	struct vsp1_dl_body *clu_dlb;
198 	unsigned long flags;
199 	u32 ctrl = VI6_CLU_CTRL_AAI | VI6_CLU_CTRL_MVS | VI6_CLU_CTRL_EN;
200 
201 	/* 2D mode can only be used with the YCbCr pixel encoding. */
202 	if (clu->mode == V4L2_CID_VSP1_CLU_MODE_2D && clu->yuv_mode)
203 		ctrl |= VI6_CLU_CTRL_AX1I_2D | VI6_CLU_CTRL_AX2I_2D
204 		     |  VI6_CLU_CTRL_OS0_2D | VI6_CLU_CTRL_OS1_2D
205 		     |  VI6_CLU_CTRL_OS2_2D | VI6_CLU_CTRL_M2D;
206 
207 	vsp1_clu_write(clu, dlb, VI6_CLU_CTRL, ctrl);
208 
209 	spin_lock_irqsave(&clu->lock, flags);
210 	clu_dlb = clu->clu;
211 	clu->clu = NULL;
212 	spin_unlock_irqrestore(&clu->lock, flags);
213 
214 	if (clu_dlb) {
215 		vsp1_dl_list_add_body(dl, clu_dlb);
216 
217 		/* Release our local reference. */
218 		vsp1_dl_body_put(clu_dlb);
219 	}
220 }
221 
clu_destroy(struct vsp1_entity * entity)222 static void clu_destroy(struct vsp1_entity *entity)
223 {
224 	struct vsp1_clu *clu = to_clu(&entity->subdev);
225 
226 	vsp1_dl_body_pool_destroy(clu->pool);
227 }
228 
229 static const struct vsp1_entity_operations clu_entity_ops = {
230 	.configure_stream = clu_configure_stream,
231 	.configure_frame = clu_configure_frame,
232 	.destroy = clu_destroy,
233 };
234 
235 /* -----------------------------------------------------------------------------
236  * Initialization and Cleanup
237  */
238 
vsp1_clu_create(struct vsp1_device * vsp1)239 struct vsp1_clu *vsp1_clu_create(struct vsp1_device *vsp1)
240 {
241 	struct vsp1_clu *clu;
242 	int ret;
243 
244 	clu = devm_kzalloc(vsp1->dev, sizeof(*clu), GFP_KERNEL);
245 	if (clu == NULL)
246 		return ERR_PTR(-ENOMEM);
247 
248 	spin_lock_init(&clu->lock);
249 
250 	clu->entity.ops = &clu_entity_ops;
251 	clu->entity.type = VSP1_ENTITY_CLU;
252 
253 	ret = vsp1_entity_init(vsp1, &clu->entity, "clu", 2, &clu_ops,
254 			       MEDIA_ENT_F_PROC_VIDEO_LUT);
255 	if (ret < 0)
256 		return ERR_PTR(ret);
257 
258 	/*
259 	 * Pre-allocate a body pool, with 3 bodies allowing a userspace update
260 	 * before the hardware has committed a previous set of tables, handling
261 	 * both the queued and pending dl entries. One extra entry is added to
262 	 * the CLU_SIZE to allow for the VI6_CLU_ADDR header.
263 	 */
264 	clu->pool = vsp1_dl_body_pool_create(clu->entity.vsp1, 3, CLU_SIZE + 1,
265 					     0);
266 	if (!clu->pool)
267 		return ERR_PTR(-ENOMEM);
268 
269 	/* Initialize the control handler. */
270 	v4l2_ctrl_handler_init(&clu->ctrls, 2);
271 	v4l2_ctrl_new_custom(&clu->ctrls, &clu_table_control, NULL);
272 	v4l2_ctrl_new_custom(&clu->ctrls, &clu_mode_control, NULL);
273 
274 	clu->entity.subdev.ctrl_handler = &clu->ctrls;
275 
276 	if (clu->ctrls.error) {
277 		dev_err(vsp1->dev, "clu: failed to initialize controls\n");
278 		ret = clu->ctrls.error;
279 		vsp1_entity_destroy(&clu->entity);
280 		return ERR_PTR(ret);
281 	}
282 
283 	v4l2_ctrl_handler_setup(&clu->ctrls);
284 
285 	return clu;
286 }
287