1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * vsp1_rpf.c  --  R-Car VSP1 Read Pixel Formatter
4  *
5  * Copyright (C) 2013-2014 Renesas Electronics Corporation
6  *
7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8  */
9 
10 #include <linux/device.h>
11 
12 #include <media/v4l2-subdev.h>
13 
14 #include "vsp1.h"
15 #include "vsp1_dl.h"
16 #include "vsp1_pipe.h"
17 #include "vsp1_rwpf.h"
18 #include "vsp1_video.h"
19 
20 #define RPF_MAX_WIDTH				8190
21 #define RPF_MAX_HEIGHT				8190
22 
23 /* Pre extended display list command data structure. */
24 struct vsp1_extcmd_auto_fld_body {
25 	u32 top_y0;
26 	u32 bottom_y0;
27 	u32 top_c0;
28 	u32 bottom_c0;
29 	u32 top_c1;
30 	u32 bottom_c1;
31 	u32 reserved0;
32 	u32 reserved1;
33 } __packed;
34 
35 /* -----------------------------------------------------------------------------
36  * Device Access
37  */
38 
39 static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf,
40 				  struct vsp1_dl_body *dlb, u32 reg, u32 data)
41 {
42 	vsp1_dl_body_write(dlb, reg + rpf->entity.index * VI6_RPF_OFFSET,
43 			       data);
44 }
45 
46 /* -----------------------------------------------------------------------------
47  * V4L2 Subdevice Operations
48  */
49 
50 static const struct v4l2_subdev_ops rpf_ops = {
51 	.pad    = &vsp1_rwpf_pad_ops,
52 };
53 
54 /* -----------------------------------------------------------------------------
55  * VSP1 Entity Operations
56  */
57 
58 static void rpf_configure_stream(struct vsp1_entity *entity,
59 				 struct vsp1_pipeline *pipe,
60 				 struct vsp1_dl_list *dl,
61 				 struct vsp1_dl_body *dlb)
62 {
63 	struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
64 	const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
65 	const struct v4l2_pix_format_mplane *format = &rpf->format;
66 	const struct v4l2_mbus_framefmt *source_format;
67 	const struct v4l2_mbus_framefmt *sink_format;
68 	unsigned int left = 0;
69 	unsigned int top = 0;
70 	u32 pstride;
71 	u32 infmt;
72 
73 	/* Stride */
74 	pstride = format->plane_fmt[0].bytesperline
75 		<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
76 	if (format->num_planes > 1)
77 		pstride |= format->plane_fmt[1].bytesperline
78 			<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
79 
80 	/*
81 	 * pstride has both STRIDE_Y and STRIDE_C, but multiplying the whole
82 	 * of pstride by 2 is conveniently OK here as we are multiplying both
83 	 * values.
84 	 */
85 	if (pipe->interlaced)
86 		pstride *= 2;
87 
88 	vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_PSTRIDE, pstride);
89 
90 	/* Format */
91 	sink_format = vsp1_entity_get_pad_format(&rpf->entity,
92 						 rpf->entity.config,
93 						 RWPF_PAD_SINK);
94 	source_format = vsp1_entity_get_pad_format(&rpf->entity,
95 						   rpf->entity.config,
96 						   RWPF_PAD_SOURCE);
97 
98 	infmt = VI6_RPF_INFMT_CIPM
99 	      | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
100 
101 	if (fmtinfo->swap_yc)
102 		infmt |= VI6_RPF_INFMT_SPYCS;
103 	if (fmtinfo->swap_uv)
104 		infmt |= VI6_RPF_INFMT_SPUVS;
105 
106 	if (sink_format->code != source_format->code)
107 		infmt |= VI6_RPF_INFMT_CSC;
108 
109 	vsp1_rpf_write(rpf, dlb, VI6_RPF_INFMT, infmt);
110 	vsp1_rpf_write(rpf, dlb, VI6_RPF_DSWAP, fmtinfo->swap);
111 
112 	/* Output location. */
113 	if (pipe->brx) {
114 		const struct v4l2_rect *compose;
115 
116 		compose = vsp1_entity_get_pad_selection(pipe->brx,
117 							pipe->brx->config,
118 							rpf->brx_input,
119 							V4L2_SEL_TGT_COMPOSE);
120 		left = compose->left;
121 		top = compose->top;
122 	}
123 
124 	if (pipe->interlaced)
125 		top /= 2;
126 
127 	vsp1_rpf_write(rpf, dlb, VI6_RPF_LOC,
128 		       (left << VI6_RPF_LOC_HCOORD_SHIFT) |
129 		       (top << VI6_RPF_LOC_VCOORD_SHIFT));
130 
131 	/*
132 	 * On Gen2 use the alpha channel (extended to 8 bits) when available or
133 	 * a fixed alpha value set through the V4L2_CID_ALPHA_COMPONENT control
134 	 * otherwise.
135 	 *
136 	 * The Gen3 RPF has extended alpha capability and can both multiply the
137 	 * alpha channel by a fixed global alpha value, and multiply the pixel
138 	 * components to convert the input to premultiplied alpha.
139 	 *
140 	 * As alpha premultiplication is available in the BRx for both Gen2 and
141 	 * Gen3 we handle it there and use the Gen3 alpha multiplier for global
142 	 * alpha multiplication only. This however prevents conversion to
143 	 * premultiplied alpha if no BRx is present in the pipeline. If that use
144 	 * case turns out to be useful we will revisit the implementation (for
145 	 * Gen3 only).
146 	 *
147 	 * We enable alpha multiplication on Gen3 using the fixed alpha value
148 	 * set through the V4L2_CID_ALPHA_COMPONENT control when the input
149 	 * contains an alpha channel. On Gen2 the global alpha is ignored in
150 	 * that case.
151 	 *
152 	 * In all cases, disable color keying.
153 	 */
154 	vsp1_rpf_write(rpf, dlb, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
155 		       (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
156 				       : VI6_RPF_ALPH_SEL_ASEL_FIXED));
157 
158 	if (entity->vsp1->info->gen == 3) {
159 		u32 mult;
160 
161 		if (fmtinfo->alpha) {
162 			/*
163 			 * When the input contains an alpha channel enable the
164 			 * alpha multiplier. If the input is premultiplied we
165 			 * need to multiply both the alpha channel and the pixel
166 			 * components by the global alpha value to keep them
167 			 * premultiplied. Otherwise multiply the alpha channel
168 			 * only.
169 			 */
170 			bool premultiplied = format->flags
171 					   & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA;
172 
173 			mult = VI6_RPF_MULT_ALPHA_A_MMD_RATIO
174 			     | (premultiplied ?
175 				VI6_RPF_MULT_ALPHA_P_MMD_RATIO :
176 				VI6_RPF_MULT_ALPHA_P_MMD_NONE);
177 		} else {
178 			/*
179 			 * When the input doesn't contain an alpha channel the
180 			 * global alpha value is applied in the unpacking unit,
181 			 * the alpha multiplier isn't needed and must be
182 			 * disabled.
183 			 */
184 			mult = VI6_RPF_MULT_ALPHA_A_MMD_NONE
185 			     | VI6_RPF_MULT_ALPHA_P_MMD_NONE;
186 		}
187 
188 		rpf->mult_alpha = mult;
189 	}
190 
191 	vsp1_rpf_write(rpf, dlb, VI6_RPF_MSK_CTRL, 0);
192 	vsp1_rpf_write(rpf, dlb, VI6_RPF_CKEY_CTRL, 0);
193 
194 }
195 
196 static void vsp1_rpf_configure_autofld(struct vsp1_rwpf *rpf,
197 				       struct vsp1_dl_list *dl)
198 {
199 	const struct v4l2_pix_format_mplane *format = &rpf->format;
200 	struct vsp1_dl_ext_cmd *cmd;
201 	struct vsp1_extcmd_auto_fld_body *auto_fld;
202 	u32 offset_y, offset_c;
203 
204 	cmd = vsp1_dl_get_pre_cmd(dl);
205 	if (WARN_ONCE(!cmd, "Failed to obtain an autofld cmd"))
206 		return;
207 
208 	/* Re-index our auto_fld to match the current RPF. */
209 	auto_fld = cmd->data;
210 	auto_fld = &auto_fld[rpf->entity.index];
211 
212 	auto_fld->top_y0 = rpf->mem.addr[0];
213 	auto_fld->top_c0 = rpf->mem.addr[1];
214 	auto_fld->top_c1 = rpf->mem.addr[2];
215 
216 	offset_y = format->plane_fmt[0].bytesperline;
217 	offset_c = format->plane_fmt[1].bytesperline;
218 
219 	auto_fld->bottom_y0 = rpf->mem.addr[0] + offset_y;
220 	auto_fld->bottom_c0 = rpf->mem.addr[1] + offset_c;
221 	auto_fld->bottom_c1 = rpf->mem.addr[2] + offset_c;
222 
223 	cmd->flags |= VI6_DL_EXT_AUTOFLD_INT | BIT(16 + rpf->entity.index);
224 }
225 
226 static void rpf_configure_frame(struct vsp1_entity *entity,
227 				struct vsp1_pipeline *pipe,
228 				struct vsp1_dl_list *dl,
229 				struct vsp1_dl_body *dlb)
230 {
231 	struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
232 
233 	vsp1_rpf_write(rpf, dlb, VI6_RPF_VRTCOL_SET,
234 		       rpf->alpha << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
235 	vsp1_rpf_write(rpf, dlb, VI6_RPF_MULT_ALPHA, rpf->mult_alpha |
236 		       (rpf->alpha << VI6_RPF_MULT_ALPHA_RATIO_SHIFT));
237 
238 	vsp1_pipeline_propagate_alpha(pipe, dlb, rpf->alpha);
239 }
240 
241 static void rpf_configure_partition(struct vsp1_entity *entity,
242 				    struct vsp1_pipeline *pipe,
243 				    struct vsp1_dl_list *dl,
244 				    struct vsp1_dl_body *dlb)
245 {
246 	struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
247 	struct vsp1_rwpf_memory mem = rpf->mem;
248 	struct vsp1_device *vsp1 = rpf->entity.vsp1;
249 	const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
250 	const struct v4l2_pix_format_mplane *format = &rpf->format;
251 	struct v4l2_rect crop;
252 
253 	/*
254 	 * Source size and crop offsets.
255 	 *
256 	 * The crop offsets correspond to the location of the crop
257 	 * rectangle top left corner in the plane buffer. Only two
258 	 * offsets are needed, as planes 2 and 3 always have identical
259 	 * strides.
260 	 */
261 	crop = *vsp1_rwpf_get_crop(rpf, rpf->entity.config);
262 
263 	/*
264 	 * Partition Algorithm Control
265 	 *
266 	 * The partition algorithm can split this frame into multiple
267 	 * slices. We must scale our partition window based on the pipe
268 	 * configuration to match the destination partition window.
269 	 * To achieve this, we adjust our crop to provide a 'sub-crop'
270 	 * matching the expected partition window. Only 'left' and
271 	 * 'width' need to be adjusted.
272 	 */
273 	if (pipe->partitions > 1) {
274 		crop.width = pipe->partition->rpf.width;
275 		crop.left += pipe->partition->rpf.left;
276 	}
277 
278 	if (pipe->interlaced) {
279 		crop.height = round_down(crop.height / 2, fmtinfo->vsub);
280 		crop.top = round_down(crop.top / 2, fmtinfo->vsub);
281 	}
282 
283 	vsp1_rpf_write(rpf, dlb, VI6_RPF_SRC_BSIZE,
284 		       (crop.width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
285 		       (crop.height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
286 	vsp1_rpf_write(rpf, dlb, VI6_RPF_SRC_ESIZE,
287 		       (crop.width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
288 		       (crop.height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
289 
290 	mem.addr[0] += crop.top * format->plane_fmt[0].bytesperline
291 		     + crop.left * fmtinfo->bpp[0] / 8;
292 
293 	if (format->num_planes > 1) {
294 		unsigned int offset;
295 
296 		offset = crop.top * format->plane_fmt[1].bytesperline
297 		       + crop.left / fmtinfo->hsub
298 		       * fmtinfo->bpp[1] / 8;
299 		mem.addr[1] += offset;
300 		mem.addr[2] += offset;
301 	}
302 
303 	/*
304 	 * On Gen3 hardware the SPUVS bit has no effect on 3-planar
305 	 * formats. Swap the U and V planes manually in that case.
306 	 */
307 	if (vsp1->info->gen == 3 && format->num_planes == 3 &&
308 	    fmtinfo->swap_uv)
309 		swap(mem.addr[1], mem.addr[2]);
310 
311 	/*
312 	 * Interlaced pipelines will use the extended pre-cmd to process
313 	 * SRCM_ADDR_{Y,C0,C1}.
314 	 */
315 	if (pipe->interlaced) {
316 		vsp1_rpf_configure_autofld(rpf, dl);
317 	} else {
318 		vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_Y, mem.addr[0]);
319 		vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_C0, mem.addr[1]);
320 		vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_C1, mem.addr[2]);
321 	}
322 }
323 
324 static void rpf_partition(struct vsp1_entity *entity,
325 			  struct vsp1_pipeline *pipe,
326 			  struct vsp1_partition *partition,
327 			  unsigned int partition_idx,
328 			  struct vsp1_partition_window *window)
329 {
330 	partition->rpf = *window;
331 }
332 
333 static const struct vsp1_entity_operations rpf_entity_ops = {
334 	.configure_stream = rpf_configure_stream,
335 	.configure_frame = rpf_configure_frame,
336 	.configure_partition = rpf_configure_partition,
337 	.partition = rpf_partition,
338 };
339 
340 /* -----------------------------------------------------------------------------
341  * Initialization and Cleanup
342  */
343 
344 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
345 {
346 	struct vsp1_rwpf *rpf;
347 	char name[6];
348 	int ret;
349 
350 	rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
351 	if (rpf == NULL)
352 		return ERR_PTR(-ENOMEM);
353 
354 	rpf->max_width = RPF_MAX_WIDTH;
355 	rpf->max_height = RPF_MAX_HEIGHT;
356 
357 	rpf->entity.ops = &rpf_entity_ops;
358 	rpf->entity.type = VSP1_ENTITY_RPF;
359 	rpf->entity.index = index;
360 
361 	sprintf(name, "rpf.%u", index);
362 	ret = vsp1_entity_init(vsp1, &rpf->entity, name, 2, &rpf_ops,
363 			       MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
364 	if (ret < 0)
365 		return ERR_PTR(ret);
366 
367 	/* Initialize the control handler. */
368 	ret = vsp1_rwpf_init_ctrls(rpf, 0);
369 	if (ret < 0) {
370 		dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
371 			index);
372 		goto error;
373 	}
374 
375 	v4l2_ctrl_handler_setup(&rpf->ctrls);
376 
377 	return rpf;
378 
379 error:
380 	vsp1_entity_destroy(&rpf->entity);
381 	return ERR_PTR(ret);
382 }
383