summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/omapdrm/omap_fb.c
blob: ddf7a457951be4fecd2c43f18ebdca14d0a58c74 (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
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
/*
 * drivers/gpu/drm/omapdrm/omap_fb.c
 *
 * Copyright (C) 2011 Texas Instruments
 * Author: Rob Clark <rob@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/seq_file.h>

#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>

#include "omap_dmm_tiler.h"
#include "omap_drv.h"

/*
 * framebuffer funcs
 */

static const u32 formats[] = {
	/* 16bpp [A]RGB: */
	DRM_FORMAT_RGB565, /* RGB16-565 */
	DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
	DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
	DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
	DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
	DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
	DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
	/* 24bpp RGB: */
	DRM_FORMAT_RGB888,   /* RGB24-888 */
	/* 32bpp [A]RGB: */
	DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
	DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
	DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
	DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
	/* YUV: */
	DRM_FORMAT_NV12,
	DRM_FORMAT_YUYV,
	DRM_FORMAT_UYVY,
};

/* per-plane info for the fb: */
struct plane {
	struct drm_gem_object *bo;
	uint32_t pitch;
	uint32_t offset;
	dma_addr_t dma_addr;
};

#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)

struct omap_framebuffer {
	struct drm_framebuffer base;
	int pin_count;
	const struct drm_format_info *format;
	struct plane planes[2];
	/* lock for pinning (pin_count and planes.dma_addr) */
	struct mutex lock;
};

static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
		struct drm_file *file_priv,
		unsigned int *handle)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	return drm_gem_handle_create(file_priv,
			omap_fb->planes[0].bo, handle);
}

static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	int i, n = fb->format->num_planes;

	DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);

	drm_framebuffer_cleanup(fb);

	for (i = 0; i < n; i++) {
		struct plane *plane = &omap_fb->planes[i];

		drm_gem_object_unreference_unlocked(plane->bo);
	}

	kfree(omap_fb);
}

static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
	.create_handle = omap_framebuffer_create_handle,
	.destroy = omap_framebuffer_destroy,
};

static uint32_t get_linear_addr(struct plane *plane,
		const struct drm_format_info *format, int n, int x, int y)
{
	uint32_t offset;

	offset = plane->offset
	       + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
	       + (y * plane->pitch / (n == 0 ? 1 : format->vsub));

	return plane->dma_addr + offset;
}

bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	struct plane *plane = &omap_fb->planes[0];

	return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
}

/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
static uint32_t drm_rotation_to_tiler(unsigned int drm_rot)
{
	uint32_t orient;

	switch (drm_rot & DRM_MODE_ROTATE_MASK) {
	default:
	case DRM_MODE_ROTATE_0:
		orient = 0;
		break;
	case DRM_MODE_ROTATE_90:
		orient = MASK_XY_FLIP | MASK_X_INVERT;
		break;
	case DRM_MODE_ROTATE_180:
		orient = MASK_X_INVERT | MASK_Y_INVERT;
		break;
	case DRM_MODE_ROTATE_270:
		orient = MASK_XY_FLIP | MASK_Y_INVERT;
		break;
	}

	if (drm_rot & DRM_MODE_REFLECT_X)
		orient ^= MASK_X_INVERT;

	if (drm_rot & DRM_MODE_REFLECT_Y)
		orient ^= MASK_Y_INVERT;

	return orient;
}

/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 */
void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
		struct drm_plane_state *state, struct omap_overlay_info *info)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	const struct drm_format_info *format = omap_fb->format;
	struct plane *plane = &omap_fb->planes[0];
	uint32_t x, y, orient = 0;

	info->fourcc = fb->format->format;

	info->pos_x      = state->crtc_x;
	info->pos_y      = state->crtc_y;
	info->out_width  = state->crtc_w;
	info->out_height = state->crtc_h;
	info->width      = state->src_w >> 16;
	info->height     = state->src_h >> 16;

	/* DSS driver wants the w & h in rotated orientation */
	if (drm_rotation_90_or_270(state->rotation))
		swap(info->width, info->height);

	x = state->src_x >> 16;
	y = state->src_y >> 16;

	if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
		uint32_t w = state->src_w >> 16;
		uint32_t h = state->src_h >> 16;

		orient = drm_rotation_to_tiler(state->rotation);

		/*
		 * omap_gem_rotated_paddr() wants the x & y in tiler units.
		 * Usually tiler unit size is the same as the pixel size, except
		 * for YUV422 formats, for which the tiler unit size is 32 bits
		 * and pixel size is 16 bits.
		 */
		if (fb->format->format == DRM_FORMAT_UYVY ||
				fb->format->format == DRM_FORMAT_YUYV) {
			x /= 2;
			w /= 2;
		}

		/* adjust x,y offset for invert: */
		if (orient & MASK_Y_INVERT)
			y += h - 1;
		if (orient & MASK_X_INVERT)
			x += w - 1;

		/* Note: x and y are in TILER units, not pixels */
		omap_gem_rotated_dma_addr(plane->bo, orient, x, y,
					  &info->paddr);
		info->rotation_type = OMAP_DSS_ROT_TILER;
		info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
		/* Note: stride in TILER units, not pixels */
		info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
	} else {
		switch (state->rotation & DRM_MODE_ROTATE_MASK) {
		case 0:
		case DRM_MODE_ROTATE_0:
			/* OK */
			break;

		default:
			dev_warn(fb->dev->dev,
				"rotation '%d' ignored for non-tiled fb\n",
				state->rotation);
			break;
		}

		info->paddr         = get_linear_addr(plane, format, 0, x, y);
		info->rotation_type = OMAP_DSS_ROT_NONE;
		info->rotation      = DRM_MODE_ROTATE_0;
		info->screen_width  = plane->pitch;
	}

	/* convert to pixels: */
	info->screen_width /= format->cpp[0];

	if (fb->format->format == DRM_FORMAT_NV12) {
		plane = &omap_fb->planes[1];

		if (info->rotation_type == OMAP_DSS_ROT_TILER) {
			WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
			omap_gem_rotated_dma_addr(plane->bo, orient, x/2, y/2,
						  &info->p_uv_addr);
		} else {
			info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
		}
	} else {
		info->p_uv_addr = 0;
	}
}

/* pin, prepare for scanout: */
int omap_framebuffer_pin(struct drm_framebuffer *fb)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	int ret, i, n = fb->format->num_planes;

	mutex_lock(&omap_fb->lock);

	if (omap_fb->pin_count > 0) {
		omap_fb->pin_count++;
		mutex_unlock(&omap_fb->lock);
		return 0;
	}

	for (i = 0; i < n; i++) {
		struct plane *plane = &omap_fb->planes[i];
		ret = omap_gem_pin(plane->bo, &plane->dma_addr);
		if (ret)
			goto fail;
		omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE);
	}

	omap_fb->pin_count++;

	mutex_unlock(&omap_fb->lock);

	return 0;

fail:
	for (i--; i >= 0; i--) {
		struct plane *plane = &omap_fb->planes[i];
		omap_gem_unpin(plane->bo);
		plane->dma_addr = 0;
	}

	mutex_unlock(&omap_fb->lock);

	return ret;
}

/* unpin, no longer being scanned out: */
void omap_framebuffer_unpin(struct drm_framebuffer *fb)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	int i, n = fb->format->num_planes;

	mutex_lock(&omap_fb->lock);

	omap_fb->pin_count--;

	if (omap_fb->pin_count > 0) {
		mutex_unlock(&omap_fb->lock);
		return;
	}

	for (i = 0; i < n; i++) {
		struct plane *plane = &omap_fb->planes[i];
		omap_gem_unpin(plane->bo);
		plane->dma_addr = 0;
	}

	mutex_unlock(&omap_fb->lock);
}

/* iterate thru all the connectors, returning ones that are attached
 * to the same fb..
 */
struct drm_connector *omap_framebuffer_get_next_connector(
		struct drm_framebuffer *fb, struct drm_connector *from)
{
	struct drm_device *dev = fb->dev;
	struct list_head *connector_list = &dev->mode_config.connector_list;
	struct drm_connector *connector = from;

	if (!from)
		return list_first_entry_or_null(connector_list, typeof(*from),
						head);

	list_for_each_entry_from(connector, connector_list, head) {
		if (connector != from) {
			struct drm_encoder *encoder = connector->encoder;
			struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
			if (crtc && crtc->primary->fb == fb)
				return connector;

		}
	}

	return NULL;
}

#ifdef CONFIG_DEBUG_FS
void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
	int i, n = fb->format->num_planes;

	seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
			(char *)&fb->format->format);

	for (i = 0; i < n; i++) {
		struct plane *plane = &omap_fb->planes[i];
		seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
				i, plane->offset, plane->pitch);
		omap_gem_describe(plane->bo, m);
	}
}
#endif

struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
		struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
{
	unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
	struct drm_gem_object *bos[4];
	struct drm_framebuffer *fb;
	int i;

	for (i = 0; i < num_planes; i++) {
		bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
		if (!bos[i]) {
			fb = ERR_PTR(-ENOENT);
			goto error;
		}
	}

	fb = omap_framebuffer_init(dev, mode_cmd, bos);
	if (IS_ERR(fb))
		goto error;

	return fb;

error:
	while (--i > 0)
		drm_gem_object_unreference_unlocked(bos[i]);

	return fb;
}

struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
		const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
{
	const struct drm_format_info *format = NULL;
	struct omap_framebuffer *omap_fb = NULL;
	struct drm_framebuffer *fb = NULL;
	unsigned int pitch = mode_cmd->pitches[0];
	int ret, i;

	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
			dev, mode_cmd, mode_cmd->width, mode_cmd->height,
			(char *)&mode_cmd->pixel_format);

	format = drm_format_info(mode_cmd->pixel_format);

	for (i = 0; i < ARRAY_SIZE(formats); i++) {
		if (formats[i] == mode_cmd->pixel_format)
			break;
	}

	if (!format || i == ARRAY_SIZE(formats)) {
		dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
			(char *)&mode_cmd->pixel_format);
		ret = -EINVAL;
		goto fail;
	}

	omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
	if (!omap_fb) {
		ret = -ENOMEM;
		goto fail;
	}

	fb = &omap_fb->base;
	omap_fb->format = format;
	mutex_init(&omap_fb->lock);

	/*
	 * The code below assumes that no format use more than two planes, and
	 * that the two planes of multiplane formats need the same number of
	 * bytes per pixel.
	 */
	if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
		dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
		ret = -EINVAL;
		goto fail;
	}

	if (pitch % format->cpp[0]) {
		dev_dbg(dev->dev,
			"buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
			pitch, format->cpp[0]);
		ret = -EINVAL;
		goto fail;
	}

	for (i = 0; i < format->num_planes; i++) {
		struct plane *plane = &omap_fb->planes[i];
		unsigned int vsub = i == 0 ? 1 : format->vsub;
		unsigned int size;

		size = pitch * mode_cmd->height / vsub;

		if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
			dev_dbg(dev->dev,
				"provided buffer object is too small! %zu < %d\n",
				bos[i]->size - mode_cmd->offsets[i], size);
			ret = -EINVAL;
			goto fail;
		}

		plane->bo     = bos[i];
		plane->offset = mode_cmd->offsets[i];
		plane->pitch  = pitch;
		plane->dma_addr  = 0;
	}

	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);

	ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
	if (ret) {
		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
		goto fail;
	}

	DBG("create: FB ID: %d (%p)", fb->base.id, fb);

	return fb;

fail:
	kfree(omap_fb);

	return ERR_PTR(ret);
}