summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/rcar-du/rcar_du_plane.c
blob: c66986414bb4fca0881b59f5b3796fc984124972 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
/*
 * rcar_du_plane.c  --  R-Car Display Unit Planes
 *
 * Copyright (C) 2013-2014 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_plane_helper.h>

#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_plane.h"
#include "rcar_du_regs.h"

#define RCAR_DU_COLORKEY_NONE		(0 << 24)
#define RCAR_DU_COLORKEY_SOURCE		(1 << 24)
#define RCAR_DU_COLORKEY_MASK		(1 << 24)

static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
			      unsigned int index, u32 reg)
{
	return rcar_du_read(rgrp->dev,
			    rgrp->mmio_offset + index * PLANE_OFF + reg);
}

static void rcar_du_plane_write(struct rcar_du_group *rgrp,
				unsigned int index, u32 reg, u32 data)
{
	rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
		      data);
}

static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
{
	struct rcar_du_plane_state *state =
		to_rcar_plane_state(plane->plane.state);
	struct drm_framebuffer *fb = plane->plane.state->fb;
	struct rcar_du_group *rgrp = plane->group;
	unsigned int src_x = state->state.src_x >> 16;
	unsigned int src_y = state->state.src_y >> 16;
	unsigned int index = state->hwindex;
	struct drm_gem_cma_object *gem;
	bool interlaced;
	u32 mwr;

	interlaced = state->state.crtc->state->adjusted_mode.flags
		   & DRM_MODE_FLAG_INTERLACE;

	/* Memory pitch (expressed in pixels). Must be doubled for interlaced
	 * operation with 32bpp formats.
	 */
	if (state->format->planes == 2)
		mwr = fb->pitches[0];
	else
		mwr = fb->pitches[0] * 8 / state->format->bpp;

	if (interlaced && state->format->bpp == 32)
		mwr *= 2;

	rcar_du_plane_write(rgrp, index, PnMWR, mwr);

	/* The Y position is expressed in raster line units and must be doubled
	 * for 32bpp formats, according to the R8A7790 datasheet. No mention of
	 * doubling the Y position is found in the R8A7779 datasheet, but the
	 * rule seems to apply there as well.
	 *
	 * Despite not being documented, doubling seem not to be needed when
	 * operating in interlaced mode.
	 *
	 * Similarly, for the second plane, NV12 and NV21 formats seem to
	 * require a halved Y position value, in both progressive and interlaced
	 * modes.
	 */
	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
			    (!interlaced && state->format->bpp == 32 ? 2 : 1));

	gem = drm_fb_cma_get_gem_obj(fb, 0);
	rcar_du_plane_write(rgrp, index, PnDSA0R, gem->paddr + fb->offsets[0]);

	if (state->format->planes == 2) {
		index = (index + 1) % 8;

		rcar_du_plane_write(rgrp, index, PnMWR, fb->pitches[0]);

		rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
		rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
				    (state->format->bpp == 16 ? 2 : 1) / 2);

		gem = drm_fb_cma_get_gem_obj(fb, 1);
		rcar_du_plane_write(rgrp, index, PnDSA0R,
				    gem->paddr + fb->offsets[1]);
	}
}

static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
				     unsigned int index)
{
	struct rcar_du_plane_state *state =
		to_rcar_plane_state(plane->plane.state);
	struct rcar_du_group *rgrp = plane->group;
	u32 colorkey;
	u32 pnmr;

	/* The PnALPHAR register controls alpha-blending in 16bpp formats
	 * (ARGB1555 and XRGB1555).
	 *
	 * For ARGB, set the alpha value to 0, and enable alpha-blending when
	 * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
	 *
	 * For XRGB, set the alpha value to the plane-wide alpha value and
	 * enable alpha-blending regardless of the X bit value.
	 */
	if (state->format->fourcc != DRM_FORMAT_XRGB1555)
		rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
	else
		rcar_du_plane_write(rgrp, index, PnALPHAR,
				    PnALPHAR_ABIT_X | state->alpha);

	pnmr = PnMR_BM_MD | state->format->pnmr;

	/* Disable color keying when requested. YUV formats have the
	 * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
	 * automatically.
	 */
	if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
		pnmr |= PnMR_SPIM_TP_OFF;

	/* For packed YUV formats we need to select the U/V order. */
	if (state->format->fourcc == DRM_FORMAT_YUYV)
		pnmr |= PnMR_YCDF_YUYV;

	rcar_du_plane_write(rgrp, index, PnMR, pnmr);

	switch (state->format->fourcc) {
	case DRM_FORMAT_RGB565:
		colorkey = ((state->colorkey & 0xf80000) >> 8)
			 | ((state->colorkey & 0x00fc00) >> 5)
			 | ((state->colorkey & 0x0000f8) >> 3);
		rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
		break;

	case DRM_FORMAT_ARGB1555:
	case DRM_FORMAT_XRGB1555:
		colorkey = ((state->colorkey & 0xf80000) >> 9)
			 | ((state->colorkey & 0x00f800) >> 6)
			 | ((state->colorkey & 0x0000f8) >> 3);
		rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
		break;

	case DRM_FORMAT_XRGB8888:
	case DRM_FORMAT_ARGB8888:
		rcar_du_plane_write(rgrp, index, PnTC3R,
				    PnTC3R_CODE | (state->colorkey & 0xffffff));
		break;
	}
}

static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
				  unsigned int index)
{
	struct rcar_du_plane_state *state =
		to_rcar_plane_state(plane->plane.state);
	struct rcar_du_group *rgrp = plane->group;
	u32 ddcr2 = PnDDCR2_CODE;
	u32 ddcr4;

	/* Data format
	 *
	 * The data format is selected by the DDDF field in PnMR and the EDF
	 * field in DDCR4.
	 */
	ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
	ddcr4 &= ~PnDDCR4_EDF_MASK;
	ddcr4 |= state->format->edf | PnDDCR4_CODE;

	rcar_du_plane_setup_mode(plane, index);

	if (state->format->planes == 2) {
		if (state->hwindex != index) {
			if (state->format->fourcc == DRM_FORMAT_NV12 ||
			    state->format->fourcc == DRM_FORMAT_NV21)
				ddcr2 |= PnDDCR2_Y420;

			if (state->format->fourcc == DRM_FORMAT_NV21)
				ddcr2 |= PnDDCR2_NV21;

			ddcr2 |= PnDDCR2_DIVU;
		} else {
			ddcr2 |= PnDDCR2_DIVY;
		}
	}

	rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
	rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);

	/* Destination position and size */
	rcar_du_plane_write(rgrp, index, PnDSXR, plane->plane.state->crtc_w);
	rcar_du_plane_write(rgrp, index, PnDSYR, plane->plane.state->crtc_h);
	rcar_du_plane_write(rgrp, index, PnDPXR, plane->plane.state->crtc_x);
	rcar_du_plane_write(rgrp, index, PnDPYR, plane->plane.state->crtc_y);

	/* Wrap-around and blinking, disabled */
	rcar_du_plane_write(rgrp, index, PnWASPR, 0);
	rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
	rcar_du_plane_write(rgrp, index, PnBTR, 0);
	rcar_du_plane_write(rgrp, index, PnMLR, 0);
}

void rcar_du_plane_setup(struct rcar_du_plane *plane)
{
	struct rcar_du_plane_state *state =
		to_rcar_plane_state(plane->plane.state);

	__rcar_du_plane_setup(plane, state->hwindex);
	if (state->format->planes == 2)
		__rcar_du_plane_setup(plane, (state->hwindex + 1) % 8);

	rcar_du_plane_setup_fb(plane);
}

static int rcar_du_plane_atomic_check(struct drm_plane *plane,
				      struct drm_plane_state *state)
{
	struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct rcar_du_device *rcdu = rplane->group->dev;

	if (!state->fb || !state->crtc) {
		rstate->format = NULL;
		return 0;
	}

	if (state->src_w >> 16 != state->crtc_w ||
	    state->src_h >> 16 != state->crtc_h) {
		dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
		return -EINVAL;
	}

	rstate->format = rcar_du_format_info(state->fb->pixel_format);
	if (rstate->format == NULL) {
		dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
			state->fb->pixel_format);
		return -EINVAL;
	}

	return 0;
}

static void rcar_du_plane_atomic_update(struct drm_plane *plane,
					struct drm_plane_state *old_state)
{
	struct rcar_du_plane *rplane = to_rcar_plane(plane);

	if (plane->state->crtc)
		rcar_du_plane_setup(rplane);
}

static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
	.atomic_check = rcar_du_plane_atomic_check,
	.atomic_update = rcar_du_plane_atomic_update,
};

static void rcar_du_plane_reset(struct drm_plane *plane)
{
	struct rcar_du_plane_state *state;

	if (plane->state && plane->state->fb)
		drm_framebuffer_unreference(plane->state->fb);

	kfree(plane->state);
	plane->state = NULL;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (state == NULL)
		return;

	state->hwindex = -1;
	state->alpha = 255;
	state->colorkey = RCAR_DU_COLORKEY_NONE;
	state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;

	plane->state = &state->state;
	plane->state->plane = plane;
}

static struct drm_plane_state *
rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
{
	struct rcar_du_plane_state *state;
	struct rcar_du_plane_state *copy;

	if (WARN_ON(!plane->state))
		return NULL;

	state = to_rcar_plane_state(plane->state);
	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
	if (copy == NULL)
		return NULL;

	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);

	return &copy->state;
}

static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
					       struct drm_plane_state *state)
{
	__drm_atomic_helper_plane_destroy_state(plane, state);
	kfree(to_rcar_plane_state(state));
}

static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
					     struct drm_plane_state *state,
					     struct drm_property *property,
					     uint64_t val)
{
	struct rcar_du_plane_state *rstate = to_rcar_plane_state(state);
	struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;

	if (property == rcdu->props.alpha)
		rstate->alpha = val;
	else if (property == rcdu->props.colorkey)
		rstate->colorkey = val;
	else if (property == rcdu->props.zpos)
		rstate->zpos = val;
	else
		return -EINVAL;

	return 0;
}

static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
	const struct drm_plane_state *state, struct drm_property *property,
	uint64_t *val)
{
	const struct rcar_du_plane_state *rstate =
		container_of(state, const struct rcar_du_plane_state, state);
	struct rcar_du_device *rcdu = to_rcar_plane(plane)->group->dev;

	if (property == rcdu->props.alpha)
		*val = rstate->alpha;
	else if (property == rcdu->props.colorkey)
		*val = rstate->colorkey;
	else if (property == rcdu->props.zpos)
		*val = rstate->zpos;
	else
		return -EINVAL;

	return 0;
}

static const struct drm_plane_funcs rcar_du_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.reset = rcar_du_plane_reset,
	.set_property = drm_atomic_helper_plane_set_property,
	.destroy = drm_plane_cleanup,
	.atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
	.atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
	.atomic_set_property = rcar_du_plane_atomic_set_property,
	.atomic_get_property = rcar_du_plane_atomic_get_property,
};

static const uint32_t formats[] = {
	DRM_FORMAT_RGB565,
	DRM_FORMAT_ARGB1555,
	DRM_FORMAT_XRGB1555,
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_UYVY,
	DRM_FORMAT_YUYV,
	DRM_FORMAT_NV12,
	DRM_FORMAT_NV21,
	DRM_FORMAT_NV16,
};

int rcar_du_planes_init(struct rcar_du_group *rgrp)
{
	struct rcar_du_device *rcdu = rgrp->dev;
	unsigned int crtcs;
	unsigned int i;
	int ret;

	 /* Create one primary plane per CRTC in this group and seven overlay
	  * planes.
	  */
	rgrp->num_planes = rgrp->num_crtcs + 7;

	crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));

	for (i = 0; i < rgrp->num_planes; ++i) {
		enum drm_plane_type type = i < rgrp->num_crtcs
					 ? DRM_PLANE_TYPE_PRIMARY
					 : DRM_PLANE_TYPE_OVERLAY;
		struct rcar_du_plane *plane = &rgrp->planes[i];

		plane->group = rgrp;

		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
					       &rcar_du_plane_funcs, formats,
					       ARRAY_SIZE(formats), type);
		if (ret < 0)
			return ret;

		drm_plane_helper_add(&plane->plane,
				     &rcar_du_plane_helper_funcs);

		if (type == DRM_PLANE_TYPE_PRIMARY)
			continue;

		drm_object_attach_property(&plane->plane.base,
					   rcdu->props.alpha, 255);
		drm_object_attach_property(&plane->plane.base,
					   rcdu->props.colorkey,
					   RCAR_DU_COLORKEY_NONE);
		drm_object_attach_property(&plane->plane.base,
					   rcdu->props.zpos, 1);
	}

	return 0;
}