vsp1_clu.c

  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
 28static 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
 43static 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
 64static 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
 82static const struct v4l2_ctrl_ops clu_ctrl_ops = {
 83	.s_ctrl = clu_s_ctrl,
 84};
 85
 86static 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
 98static const char * const clu_mode_menu[] = {
 99	"2D",
100	"3D",
101	NULL,
102};
103
104static 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
119static 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
125static 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
133static 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
143static 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
157static 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
164static const struct v4l2_subdev_ops clu_ops = {
165	.pad    = &clu_pad_ops,
166};
167
168/* -----------------------------------------------------------------------------
169 * VSP1 Entity Operations
170 */
171
172static 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
189static 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
220static 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
227static 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
237struct 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}