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1179 serge 1
/*
2
 * Copyright (c) 2006-2009 Red Hat Inc.
3
 * Copyright (c) 2006-2008 Intel Corporation
4
 * Copyright (c) 2007 Dave Airlie 
5
 *
6
 * DRM framebuffer helper functions
7
 *
8
 * Permission to use, copy, modify, distribute, and sell this software and its
9
 * documentation for any purpose is hereby granted without fee, provided that
10
 * the above copyright notice appear in all copies and that both that copyright
11
 * notice and this permission notice appear in supporting documentation, and
12
 * that the name of the copyright holders not be used in advertising or
13
 * publicity pertaining to distribution of the software without specific,
14
 * written prior permission.  The copyright holders make no representations
15
 * about the suitability of this software for any purpose.  It is provided "as
16
 * is" without express or implied warranty.
17
 *
18
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24
 * OF THIS SOFTWARE.
25
 *
26
 * Authors:
27
 *      Dave Airlie 
28
 *      Jesse Barnes 
29
 */
1430 serge 30
#include 
1963 serge 31
#include 
32
#include 
1179 serge 33
#include 
3031 serge 34
#include 
35
#include 
36
#include 
37
#include 
38
#include 
1179 serge 39
 
1430 serge 40
MODULE_AUTHOR("David Airlie, Jesse Barnes");
41
MODULE_DESCRIPTION("DRM KMS helper");
42
MODULE_LICENSE("GPL and additional rights");
1179 serge 43
 
44
static LIST_HEAD(kernel_fb_helper_list);
45
 
1963 serge 46
/* simple single crtc case helper function */
47
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
1221 serge 48
{
1963 serge 49
	struct drm_device *dev = fb_helper->dev;
50
	struct drm_connector *connector;
51
	int i;
1221 serge 52
 
1963 serge 53
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
54
		struct drm_fb_helper_connector *fb_helper_connector;
55
 
56
		fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
57
		if (!fb_helper_connector)
58
			goto fail;
59
 
60
		fb_helper_connector->connector = connector;
61
		fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
62
	}
1221 serge 63
	return 0;
1963 serge 64
fail:
65
	for (i = 0; i < fb_helper->connector_count; i++) {
66
		kfree(fb_helper->connector_info[i]);
67
		fb_helper->connector_info[i] = NULL;
68
	}
69
	fb_helper->connector_count = 0;
70
    return -ENOMEM;
1221 serge 71
}
1963 serge 72
EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
1221 serge 73
 
1963 serge 74
static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
1179 serge 75
{
1963 serge 76
	uint16_t *r_base, *g_base, *b_base;
77
	int i;
1179 serge 78
 
1963 serge 79
	r_base = crtc->gamma_store;
80
	g_base = r_base + crtc->gamma_size;
81
	b_base = g_base + crtc->gamma_size;
1179 serge 82
 
1963 serge 83
	for (i = 0; i < crtc->gamma_size; i++)
84
		helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
1179 serge 85
}
86
 
1963 serge 87
static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
1179 serge 88
{
1963 serge 89
	uint16_t *r_base, *g_base, *b_base;
90
 
3031 serge 91
	if (crtc->funcs->gamma_set == NULL)
92
		return;
93
 
1963 serge 94
	r_base = crtc->gamma_store;
95
	g_base = r_base + crtc->gamma_size;
96
	b_base = g_base + crtc->gamma_size;
97
 
98
	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
1179 serge 99
}
100
 
101
 
102
 
3031 serge 103
static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
1179 serge 104
{
105
	struct drm_fb_helper *fb_helper = info->par;
106
	struct drm_device *dev = fb_helper->dev;
107
	struct drm_crtc *crtc;
1963 serge 108
	struct drm_connector *connector;
109
	int i, j;
1179 serge 110
 
111
	/*
3031 serge 112
	 * For each CRTC in this fb, turn the connectors on/off.
1179 serge 113
	 */
1963 serge 114
	mutex_lock(&dev->mode_config.mutex);
1179 serge 115
	for (i = 0; i < fb_helper->crtc_count; i++) {
1963 serge 116
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
1179 serge 117
 
1963 serge 118
		if (!crtc->enabled)
1179 serge 119
				continue;
120
 
3031 serge 121
		/* Walk the connectors & encoders on this fb turning them on/off */
1963 serge 122
		for (j = 0; j < fb_helper->connector_count; j++) {
123
			connector = fb_helper->connector_info[j]->connector;
3031 serge 124
			connector->funcs->dpms(connector, dpms_mode);
1963 serge 125
			drm_connector_property_set_value(connector,
3031 serge 126
				dev->mode_config.dpms_property, dpms_mode);
1963 serge 127
		}
128
	}
1179 serge 129
				mutex_unlock(&dev->mode_config.mutex);
130
}
131
 
132
int drm_fb_helper_blank(int blank, struct fb_info *info)
133
{
134
	switch (blank) {
1321 serge 135
	/* Display: On; HSync: On, VSync: On */
1179 serge 136
	case FB_BLANK_UNBLANK:
3031 serge 137
		drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON);
1179 serge 138
		break;
1321 serge 139
	/* Display: Off; HSync: On, VSync: On */
1179 serge 140
	case FB_BLANK_NORMAL:
3031 serge 141
		drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY);
1179 serge 142
		break;
1321 serge 143
	/* Display: Off; HSync: Off, VSync: On */
1179 serge 144
	case FB_BLANK_HSYNC_SUSPEND:
3031 serge 145
		drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY);
1179 serge 146
		break;
1321 serge 147
	/* Display: Off; HSync: On, VSync: Off */
1179 serge 148
	case FB_BLANK_VSYNC_SUSPEND:
3031 serge 149
		drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND);
1179 serge 150
		break;
1321 serge 151
	/* Display: Off; HSync: Off, VSync: Off */
1179 serge 152
	case FB_BLANK_POWERDOWN:
3031 serge 153
		drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF);
1179 serge 154
		break;
155
	}
156
	return 0;
157
}
158
EXPORT_SYMBOL(drm_fb_helper_blank);
159
 
160
static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
161
{
162
	int i;
163
 
1963 serge 164
	for (i = 0; i < helper->connector_count; i++)
165
		kfree(helper->connector_info[i]);
166
	kfree(helper->connector_info);
3031 serge 167
	for (i = 0; i < helper->crtc_count; i++) {
1179 serge 168
		kfree(helper->crtc_info[i].mode_set.connectors);
3031 serge 169
		if (helper->crtc_info[i].mode_set.mode)
170
			drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode);
171
	}
1179 serge 172
	kfree(helper->crtc_info);
173
}
174
 
1963 serge 175
int drm_fb_helper_init(struct drm_device *dev,
176
		       struct drm_fb_helper *fb_helper,
177
		       int crtc_count, int max_conn_count)
1179 serge 178
{
179
	struct drm_crtc *crtc;
180
	int i;
181
 
1963 serge 182
	fb_helper->dev = dev;
183
 
184
	INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
185
 
186
	fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
187
	if (!fb_helper->crtc_info)
1179 serge 188
		return -ENOMEM;
189
 
1963 serge 190
	fb_helper->crtc_count = crtc_count;
191
	fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
192
	if (!fb_helper->connector_info) {
193
		kfree(fb_helper->crtc_info);
194
		return -ENOMEM;
195
	}
196
	fb_helper->connector_count = 0;
1179 serge 197
 
198
	for (i = 0; i < crtc_count; i++) {
1963 serge 199
		fb_helper->crtc_info[i].mode_set.connectors =
1179 serge 200
			kcalloc(max_conn_count,
201
				sizeof(struct drm_connector *),
202
				GFP_KERNEL);
203
 
3031 serge 204
		if (!fb_helper->crtc_info[i].mode_set.connectors)
1179 serge 205
			goto out_free;
1963 serge 206
		fb_helper->crtc_info[i].mode_set.num_connectors = 0;
1179 serge 207
	}
208
 
209
	i = 0;
210
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1963 serge 211
		fb_helper->crtc_info[i].mode_set.crtc = crtc;
1179 serge 212
		i++;
213
	}
3031 serge 214
 
1179 serge 215
	return 0;
216
out_free:
1963 serge 217
	drm_fb_helper_crtc_free(fb_helper);
1179 serge 218
	return -ENOMEM;
219
}
1963 serge 220
EXPORT_SYMBOL(drm_fb_helper_init);
1179 serge 221
 
1246 serge 222
static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
1221 serge 223
		     u16 blue, u16 regno, struct fb_info *info)
224
{
225
	struct drm_fb_helper *fb_helper = info->par;
226
	struct drm_framebuffer *fb = fb_helper->fb;
227
	int pindex;
228
 
1246 serge 229
	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
230
		u32 *palette;
231
		u32 value;
232
		/* place color in psuedopalette */
233
		if (regno > 16)
234
			return -EINVAL;
235
		palette = (u32 *)info->pseudo_palette;
236
		red >>= (16 - info->var.red.length);
237
		green >>= (16 - info->var.green.length);
238
		blue >>= (16 - info->var.blue.length);
239
		value = (red << info->var.red.offset) |
240
			(green << info->var.green.offset) |
241
			(blue << info->var.blue.offset);
1963 serge 242
		if (info->var.transp.length > 0) {
243
			u32 mask = (1 << info->var.transp.length) - 1;
244
			mask <<= info->var.transp.offset;
245
			value |= mask;
246
		}
1246 serge 247
		palette[regno] = value;
248
		return 0;
249
	}
250
 
1221 serge 251
	pindex = regno;
252
 
253
	if (fb->bits_per_pixel == 16) {
254
		pindex = regno << 3;
255
 
256
		if (fb->depth == 16 && regno > 63)
1246 serge 257
			return -EINVAL;
1221 serge 258
		if (fb->depth == 15 && regno > 31)
1246 serge 259
			return -EINVAL;
1221 serge 260
 
261
		if (fb->depth == 16) {
262
			u16 r, g, b;
263
			int i;
264
			if (regno < 32) {
265
				for (i = 0; i < 8; i++)
266
					fb_helper->funcs->gamma_set(crtc, red,
267
						green, blue, pindex + i);
268
			}
269
 
270
			fb_helper->funcs->gamma_get(crtc, &r,
271
						    &g, &b,
272
						    pindex >> 1);
273
 
274
			for (i = 0; i < 4; i++)
275
				fb_helper->funcs->gamma_set(crtc, r,
276
							    green, b,
277
							    (pindex >> 1) + i);
278
		}
279
	}
280
 
281
	if (fb->depth != 16)
282
		fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
1246 serge 283
	return 0;
1221 serge 284
}
285
 
286
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
287
{
288
	struct drm_fb_helper *fb_helper = info->par;
1963 serge 289
	struct drm_crtc_helper_funcs *crtc_funcs;
1221 serge 290
	u16 *red, *green, *blue, *transp;
291
	struct drm_crtc *crtc;
1963 serge 292
	int i, j, rc = 0;
1221 serge 293
	int start;
294
 
295
		for (i = 0; i < fb_helper->crtc_count; i++) {
1963 serge 296
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
297
		crtc_funcs = crtc->helper_private;
1221 serge 298
 
299
		red = cmap->red;
300
		green = cmap->green;
301
		blue = cmap->blue;
302
		transp = cmap->transp;
303
		start = cmap->start;
304
 
1963 serge 305
		for (j = 0; j < cmap->len; j++) {
1221 serge 306
			u16 hred, hgreen, hblue, htransp = 0xffff;
307
 
308
			hred = *red++;
309
			hgreen = *green++;
310
			hblue = *blue++;
311
 
312
			if (transp)
313
				htransp = *transp++;
314
 
1246 serge 315
			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
316
			if (rc)
317
				return rc;
1221 serge 318
		}
319
		crtc_funcs->load_lut(crtc);
320
	}
321
	return rc;
322
}
323
EXPORT_SYMBOL(drm_fb_helper_setcmap);
324
 
1179 serge 325
int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
326
			    struct fb_info *info)
327
{
328
	struct drm_fb_helper *fb_helper = info->par;
329
	struct drm_framebuffer *fb = fb_helper->fb;
330
	int depth;
331
 
1963 serge 332
	if (var->pixclock != 0 || in_dbg_master())
1179 serge 333
		return -EINVAL;
334
 
335
	/* Need to resize the fb object !!! */
3031 serge 336
	if (var->bits_per_pixel > fb->bits_per_pixel ||
337
	    var->xres > fb->width || var->yres > fb->height ||
338
	    var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
1404 serge 339
		DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
3031 serge 340
			  "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
341
			  var->xres, var->yres, var->bits_per_pixel,
342
			  var->xres_virtual, var->yres_virtual,
1404 serge 343
			  fb->width, fb->height, fb->bits_per_pixel);
1179 serge 344
		return -EINVAL;
345
	}
346
 
347
	switch (var->bits_per_pixel) {
348
	case 16:
349
		depth = (var->green.length == 6) ? 16 : 15;
350
		break;
351
	case 32:
352
		depth = (var->transp.length > 0) ? 32 : 24;
353
		break;
354
	default:
355
		depth = var->bits_per_pixel;
356
		break;
357
	}
358
 
359
	switch (depth) {
360
	case 8:
361
		var->red.offset = 0;
362
		var->green.offset = 0;
363
		var->blue.offset = 0;
364
		var->red.length = 8;
365
		var->green.length = 8;
366
		var->blue.length = 8;
367
		var->transp.length = 0;
368
		var->transp.offset = 0;
369
		break;
370
	case 15:
371
		var->red.offset = 10;
372
		var->green.offset = 5;
373
		var->blue.offset = 0;
374
		var->red.length = 5;
375
		var->green.length = 5;
376
		var->blue.length = 5;
377
		var->transp.length = 1;
378
		var->transp.offset = 15;
379
		break;
380
	case 16:
381
		var->red.offset = 11;
382
		var->green.offset = 5;
383
		var->blue.offset = 0;
384
		var->red.length = 5;
385
		var->green.length = 6;
386
		var->blue.length = 5;
387
		var->transp.length = 0;
388
		var->transp.offset = 0;
389
		break;
390
	case 24:
391
		var->red.offset = 16;
392
		var->green.offset = 8;
393
		var->blue.offset = 0;
394
		var->red.length = 8;
395
		var->green.length = 8;
396
		var->blue.length = 8;
397
		var->transp.length = 0;
398
		var->transp.offset = 0;
399
		break;
400
	case 32:
401
		var->red.offset = 16;
402
		var->green.offset = 8;
403
		var->blue.offset = 0;
404
		var->red.length = 8;
405
		var->green.length = 8;
406
		var->blue.length = 8;
407
		var->transp.length = 8;
408
		var->transp.offset = 24;
409
		break;
410
	default:
411
		return -EINVAL;
412
	}
413
	return 0;
414
}
415
EXPORT_SYMBOL(drm_fb_helper_check_var);
416
 
417
/* this will let fbcon do the mode init */
418
int drm_fb_helper_set_par(struct fb_info *info)
419
{
420
	struct drm_fb_helper *fb_helper = info->par;
421
	struct drm_device *dev = fb_helper->dev;
422
	struct fb_var_screeninfo *var = &info->var;
423
	struct drm_crtc *crtc;
424
	int ret;
425
	int i;
426
 
1313 serge 427
	if (var->pixclock != 0) {
1430 serge 428
		DRM_ERROR("PIXEL CLOCK SET\n");
1179 serge 429
		return -EINVAL;
430
	}
431
 
1963 serge 432
	mutex_lock(&dev->mode_config.mutex);
1179 serge 433
		for (i = 0; i < fb_helper->crtc_count; i++) {
1963 serge 434
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
1268 serge 435
			ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
1963 serge 436
		if (ret) {
1179 serge 437
			mutex_unlock(&dev->mode_config.mutex);
438
				return ret;
439
		}
440
	}
1963 serge 441
	mutex_unlock(&dev->mode_config.mutex);
442
 
443
	if (fb_helper->delayed_hotplug) {
444
		fb_helper->delayed_hotplug = false;
445
//       drm_fb_helper_hotplug_event(fb_helper);
446
	}
1179 serge 447
	return 0;
448
}
449
EXPORT_SYMBOL(drm_fb_helper_set_par);
450
 
451
int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
452
			      struct fb_info *info)
453
{
454
	struct drm_fb_helper *fb_helper = info->par;
455
	struct drm_device *dev = fb_helper->dev;
456
	struct drm_mode_set *modeset;
457
	struct drm_crtc *crtc;
458
	int ret = 0;
459
	int i;
460
 
1963 serge 461
	mutex_lock(&dev->mode_config.mutex);
1179 serge 462
		for (i = 0; i < fb_helper->crtc_count; i++) {
1963 serge 463
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
1179 serge 464
 
465
		modeset = &fb_helper->crtc_info[i].mode_set;
466
 
467
		modeset->x = var->xoffset;
468
		modeset->y = var->yoffset;
469
 
470
		if (modeset->num_connectors) {
471
			ret = crtc->funcs->set_config(modeset);
472
			if (!ret) {
473
				info->var.xoffset = var->xoffset;
474
				info->var.yoffset = var->yoffset;
475
			}
476
		}
477
	}
1963 serge 478
	mutex_unlock(&dev->mode_config.mutex);
1179 serge 479
	return ret;
480
}
481
EXPORT_SYMBOL(drm_fb_helper_pan_display);
482
 
1963 serge 483
int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
484
				  int preferred_bpp)
1179 serge 485
{
486
	int new_fb = 0;
487
	int crtc_count = 0;
1963 serge 488
	int i;
1179 serge 489
	struct fb_info *info;
1963 serge 490
	struct drm_fb_helper_surface_size sizes;
491
	int gamma_size = 0;
1179 serge 492
 
1963 serge 493
	memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
494
	sizes.surface_depth = 24;
495
	sizes.surface_bpp = 32;
496
	sizes.fb_width = (unsigned)-1;
497
	sizes.fb_height = (unsigned)-1;
1221 serge 498
 
3031 serge 499
	/* if driver picks 8 or 16 by default use that
500
	   for both depth/bpp */
501
	if (preferred_bpp != sizes.surface_bpp) {
502
		sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
503
	}
504
	/* first up get a count of crtcs now in use and new min/maxes width/heights */
505
	for (i = 0; i < fb_helper->connector_count; i++) {
506
		struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
507
		struct drm_cmdline_mode *cmdline_mode;
508
 
509
		cmdline_mode = &fb_helper_conn->cmdline_mode;
510
 
511
		if (cmdline_mode->bpp_specified) {
512
			switch (cmdline_mode->bpp) {
513
			case 8:
514
				sizes.surface_depth = sizes.surface_bpp = 8;
515
				break;
516
			case 15:
517
				sizes.surface_depth = 15;
518
				sizes.surface_bpp = 16;
519
				break;
520
			case 16:
521
				sizes.surface_depth = sizes.surface_bpp = 16;
522
				break;
523
			case 24:
524
				sizes.surface_depth = sizes.surface_bpp = 24;
525
				break;
526
			case 32:
1963 serge 527
    sizes.surface_depth = 24;
528
    sizes.surface_bpp = 32;
3031 serge 529
				break;
530
			}
531
			break;
532
		}
533
	}
1221 serge 534
 
1963 serge 535
	crtc_count = 0;
536
	for (i = 0; i < fb_helper->crtc_count; i++) {
537
		struct drm_display_mode *desired_mode;
538
		desired_mode = fb_helper->crtc_info[i].desired_mode;
1221 serge 539
 
1963 serge 540
		if (desired_mode) {
541
			if (gamma_size == 0)
542
				gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
543
			if (desired_mode->hdisplay < sizes.fb_width)
544
				sizes.fb_width = desired_mode->hdisplay;
545
			if (desired_mode->vdisplay < sizes.fb_height)
546
				sizes.fb_height = desired_mode->vdisplay;
547
			if (desired_mode->hdisplay > sizes.surface_width)
548
				sizes.surface_width = desired_mode->hdisplay;
549
			if (desired_mode->vdisplay > sizes.surface_height)
550
				sizes.surface_height = desired_mode->vdisplay;
1179 serge 551
			crtc_count++;
552
		}
553
	}
554
 
1963 serge 555
	if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
1179 serge 556
		/* hmm everyone went away - assume VGA cable just fell out
557
		   and will come back later. */
1963 serge 558
		DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
559
		sizes.fb_width = sizes.surface_width = 1024;
560
		sizes.fb_height = sizes.surface_height = 768;
1179 serge 561
	}
562
 
1963 serge 563
	/* push down into drivers */
564
    new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
565
	if (new_fb < 0)
566
		return new_fb;
1179 serge 567
 
1963 serge 568
	info = fb_helper->fbdev;
1179 serge 569
 
1963 serge 570
	/* set the fb pointer */
571
	for (i = 0; i < fb_helper->crtc_count; i++) {
572
		fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
1179 serge 573
		}
574
 
575
	if (new_fb) {
1313 serge 576
		info->var.pixclock = 0;
1963 serge 577
 
578
		printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
579
		       info->fix.id);
580
 
1179 serge 581
	} else {
582
		drm_fb_helper_set_par(info);
583
	}
584
 
1963 serge 585
 
586
	if (new_fb)
587
        list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
588
 
1179 serge 589
	return 0;
590
}
591
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
592
 
1221 serge 593
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
594
			    uint32_t depth)
1179 serge 595
{
596
	info->fix.type = FB_TYPE_PACKED_PIXELS;
1221 serge 597
	info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
1246 serge 598
		FB_VISUAL_TRUECOLOR;
1963 serge 599
	info->fix.mmio_start = 0;
600
	info->fix.mmio_len = 0;
1179 serge 601
	info->fix.type_aux = 0;
602
	info->fix.xpanstep = 1; /* doing it in hw */
603
	info->fix.ypanstep = 1; /* doing it in hw */
604
	info->fix.ywrapstep = 0;
605
	info->fix.accel = FB_ACCEL_NONE;
606
	info->fix.type_aux = 0;
607
 
608
	info->fix.line_length = pitch;
609
	return;
610
}
611
EXPORT_SYMBOL(drm_fb_helper_fill_fix);
612
 
1963 serge 613
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1179 serge 614
			    uint32_t fb_width, uint32_t fb_height)
615
{
1963 serge 616
	struct drm_framebuffer *fb = fb_helper->fb;
617
	info->pseudo_palette = fb_helper->pseudo_palette;
1179 serge 618
	info->var.xres_virtual = fb->width;
619
	info->var.yres_virtual = fb->height;
620
	info->var.bits_per_pixel = fb->bits_per_pixel;
1963 serge 621
	info->var.accel_flags = FB_ACCELF_TEXT;
1179 serge 622
	info->var.xoffset = 0;
623
	info->var.yoffset = 0;
624
	info->var.activate = FB_ACTIVATE_NOW;
625
	info->var.height = -1;
626
	info->var.width = -1;
627
 
628
	switch (fb->depth) {
629
	case 8:
630
		info->var.red.offset = 0;
631
		info->var.green.offset = 0;
632
		info->var.blue.offset = 0;
633
		info->var.red.length = 8; /* 8bit DAC */
634
		info->var.green.length = 8;
635
		info->var.blue.length = 8;
636
		info->var.transp.offset = 0;
637
		info->var.transp.length = 0;
638
		break;
639
	case 15:
640
		info->var.red.offset = 10;
641
		info->var.green.offset = 5;
642
		info->var.blue.offset = 0;
643
		info->var.red.length = 5;
644
		info->var.green.length = 5;
645
		info->var.blue.length = 5;
646
		info->var.transp.offset = 15;
647
		info->var.transp.length = 1;
648
		break;
649
	case 16:
650
		info->var.red.offset = 11;
651
		info->var.green.offset = 5;
652
		info->var.blue.offset = 0;
653
		info->var.red.length = 5;
654
		info->var.green.length = 6;
655
		info->var.blue.length = 5;
656
		info->var.transp.offset = 0;
657
		break;
658
	case 24:
659
		info->var.red.offset = 16;
660
		info->var.green.offset = 8;
661
		info->var.blue.offset = 0;
662
		info->var.red.length = 8;
663
		info->var.green.length = 8;
664
		info->var.blue.length = 8;
665
		info->var.transp.offset = 0;
666
		info->var.transp.length = 0;
667
		break;
668
	case 32:
669
		info->var.red.offset = 16;
670
		info->var.green.offset = 8;
671
		info->var.blue.offset = 0;
672
		info->var.red.length = 8;
673
		info->var.green.length = 8;
674
		info->var.blue.length = 8;
675
		info->var.transp.offset = 24;
676
		info->var.transp.length = 8;
677
		break;
678
	default:
679
		break;
680
	}
681
 
682
	info->var.xres = fb_width;
683
	info->var.yres = fb_height;
684
}
685
EXPORT_SYMBOL(drm_fb_helper_fill_var);
1963 serge 686
 
687
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
688
					       uint32_t maxX,
689
					       uint32_t maxY)
690
{
691
	struct drm_connector *connector;
692
	int count = 0;
693
	int i;
694
 
695
	for (i = 0; i < fb_helper->connector_count; i++) {
696
		connector = fb_helper->connector_info[i]->connector;
697
		count += connector->funcs->fill_modes(connector, maxX, maxY);
698
	}
699
 
700
	return count;
701
}
702
 
703
static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
704
{
705
	struct drm_display_mode *mode;
706
 
707
	list_for_each_entry(mode, &fb_connector->connector->modes, head) {
708
		if (drm_mode_width(mode) > width ||
709
		    drm_mode_height(mode) > height)
710
			continue;
711
		if (mode->type & DRM_MODE_TYPE_PREFERRED)
712
			return mode;
713
	}
714
	return NULL;
715
}
716
 
717
static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
718
{
719
	struct drm_cmdline_mode *cmdline_mode;
720
	cmdline_mode = &fb_connector->cmdline_mode;
721
	return cmdline_mode->specified;
722
}
723
 
724
 
725
static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
726
{
727
	bool enable;
728
 
729
	if (strict) {
730
		enable = connector->status == connector_status_connected;
731
	} else {
732
		enable = connector->status != connector_status_disconnected;
733
	}
734
	return enable;
735
}
736
 
737
static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
738
				  bool *enabled)
739
{
740
	bool any_enabled = false;
741
	struct drm_connector *connector;
742
	int i = 0;
743
 
744
	for (i = 0; i < fb_helper->connector_count; i++) {
745
		connector = fb_helper->connector_info[i]->connector;
746
		enabled[i] = drm_connector_enabled(connector, true);
747
		DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
748
			  enabled[i] ? "yes" : "no");
749
		any_enabled |= enabled[i];
750
	}
751
 
752
	if (any_enabled)
753
		return;
754
 
755
	for (i = 0; i < fb_helper->connector_count; i++) {
756
		connector = fb_helper->connector_info[i]->connector;
757
		enabled[i] = drm_connector_enabled(connector, false);
758
	}
759
}
760
 
761
 
762
static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
763
				 struct drm_display_mode **modes,
764
				 bool *enabled, int width, int height)
765
{
766
	struct drm_fb_helper_connector *fb_helper_conn;
767
	int i;
768
 
769
	for (i = 0; i < fb_helper->connector_count; i++) {
770
		fb_helper_conn = fb_helper->connector_info[i];
771
 
772
		if (enabled[i] == false)
773
			continue;
774
 
775
		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
776
			      fb_helper_conn->connector->base.id);
777
 
778
		/* got for command line mode first */
779
//       modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
780
 
781
        modes[i] = NULL;
782
 
783
		if (!modes[i]) {
784
			DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
785
				      fb_helper_conn->connector->base.id);
786
			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
787
		}
788
		/* No preferred modes, pick one off the list */
789
		if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
790
			list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
791
				break;
792
		}
793
		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
794
			  "none");
795
	}
796
	return true;
797
}
798
 
799
static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
800
			  struct drm_fb_helper_crtc **best_crtcs,
801
			  struct drm_display_mode **modes,
802
			  int n, int width, int height)
803
{
804
	int c, o;
805
	struct drm_device *dev = fb_helper->dev;
806
	struct drm_connector *connector;
807
	struct drm_connector_helper_funcs *connector_funcs;
808
	struct drm_encoder *encoder;
809
	struct drm_fb_helper_crtc *best_crtc;
810
	int my_score, best_score, score;
811
	struct drm_fb_helper_crtc **crtcs, *crtc;
812
	struct drm_fb_helper_connector *fb_helper_conn;
813
 
814
	if (n == fb_helper->connector_count)
815
		return 0;
816
 
817
	fb_helper_conn = fb_helper->connector_info[n];
818
	connector = fb_helper_conn->connector;
819
 
820
	best_crtcs[n] = NULL;
821
	best_crtc = NULL;
822
	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
823
	if (modes[n] == NULL)
824
		return best_score;
825
 
826
	crtcs = kzalloc(dev->mode_config.num_connector *
827
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
828
	if (!crtcs)
829
		return best_score;
830
 
831
	my_score = 1;
832
	if (connector->status == connector_status_connected)
833
		my_score++;
834
	if (drm_has_cmdline_mode(fb_helper_conn))
835
		my_score++;
836
	if (drm_has_preferred_mode(fb_helper_conn, width, height))
837
		my_score++;
838
 
839
	connector_funcs = connector->helper_private;
840
	encoder = connector_funcs->best_encoder(connector);
841
	if (!encoder)
842
		goto out;
843
 
844
	/* select a crtc for this connector and then attempt to configure
845
	   remaining connectors */
846
	for (c = 0; c < fb_helper->crtc_count; c++) {
847
		crtc = &fb_helper->crtc_info[c];
848
 
849
		if ((encoder->possible_crtcs & (1 << c)) == 0) {
850
			continue;
851
		}
852
 
853
		for (o = 0; o < n; o++)
854
			if (best_crtcs[o] == crtc)
855
				break;
856
 
857
		if (o < n) {
858
			/* ignore cloning unless only a single crtc */
859
			if (fb_helper->crtc_count > 1)
860
				continue;
861
 
862
			if (!drm_mode_equal(modes[o], modes[n]))
863
				continue;
864
		}
865
 
866
		crtcs[n] = crtc;
867
		memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
868
		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
869
						  width, height);
870
		if (score > best_score) {
871
			best_crtc = crtc;
872
			best_score = score;
873
			memcpy(best_crtcs, crtcs,
874
			       dev->mode_config.num_connector *
875
			       sizeof(struct drm_fb_helper_crtc *));
876
		}
877
	}
878
out:
879
	kfree(crtcs);
880
	return best_score;
881
}
882
 
883
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
884
{
885
	struct drm_device *dev = fb_helper->dev;
886
	struct drm_fb_helper_crtc **crtcs;
887
	struct drm_display_mode **modes;
888
	struct drm_mode_set *modeset;
889
	bool *enabled;
890
	int width, height;
891
	int i, ret;
892
 
893
	DRM_DEBUG_KMS("\n");
894
 
895
	width = dev->mode_config.max_width;
896
	height = dev->mode_config.max_height;
897
 
898
	crtcs = kcalloc(dev->mode_config.num_connector,
899
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
900
	modes = kcalloc(dev->mode_config.num_connector,
901
			sizeof(struct drm_display_mode *), GFP_KERNEL);
902
	enabled = kcalloc(dev->mode_config.num_connector,
903
			  sizeof(bool), GFP_KERNEL);
904
 
905
	drm_enable_connectors(fb_helper, enabled);
906
 
907
    //ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
908
 
909
    ret = 0;
910
 
911
	if (!ret) {
912
		ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
913
		if (!ret)
914
			DRM_ERROR("Unable to find initial modes\n");
915
	}
916
 
917
	DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
918
 
919
	drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
920
 
921
	/* need to set the modesets up here for use later */
922
	/* fill out the connector<->crtc mappings into the modesets */
923
	for (i = 0; i < fb_helper->crtc_count; i++) {
924
		modeset = &fb_helper->crtc_info[i].mode_set;
925
		modeset->num_connectors = 0;
926
	}
927
 
928
	for (i = 0; i < fb_helper->connector_count; i++) {
929
		struct drm_display_mode *mode = modes[i];
930
		struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
931
		modeset = &fb_crtc->mode_set;
932
 
933
		if (mode && fb_crtc) {
934
			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
935
				      mode->name, fb_crtc->mode_set.crtc->base.id);
936
			fb_crtc->desired_mode = mode;
937
			if (modeset->mode)
938
				drm_mode_destroy(dev, modeset->mode);
939
			modeset->mode = drm_mode_duplicate(dev,
940
							   fb_crtc->desired_mode);
941
			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
942
		}
943
	}
944
 
945
	kfree(crtcs);
946
	kfree(modes);
947
	kfree(enabled);
948
}
949
 
950
/**
951
 * drm_helper_initial_config - setup a sane initial connector configuration
952
 * @dev: DRM device
953
 *
954
 * LOCKING:
955
 * Called at init time, must take mode config lock.
956
 *
957
 * Scan the CRTCs and connectors and try to put together an initial setup.
958
 * At the moment, this is a cloned configuration across all heads with
959
 * a new framebuffer object as the backing store.
960
 *
961
 * RETURNS:
962
 * Zero if everything went ok, nonzero otherwise.
963
 */
964
bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
965
{
966
	struct drm_device *dev = fb_helper->dev;
967
	int count = 0;
968
 
969
	/* disable all the possible outputs/crtcs before entering KMS mode */
3031 serge 970
	drm_helper_disable_unused_functions(fb_helper->dev);
1963 serge 971
 
972
//   drm_fb_helper_parse_command_line(fb_helper);
973
 
974
	count = drm_fb_helper_probe_connector_modes(fb_helper,
975
						    dev->mode_config.max_width,
976
						    dev->mode_config.max_height);
977
	/*
978
	 * we shouldn't end up with no modes here.
979
	 */
980
	if (count == 0) {
981
		printk(KERN_INFO "No connectors reported connected with modes\n");
982
	}
983
	drm_setup_crtcs(fb_helper);
984
 
985
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
986
}
987
EXPORT_SYMBOL(drm_fb_helper_initial_config);