summaryrefslogtreecommitdiffstats
path: root/drivers/video/msm/mdp.c
blob: 2e0f3bab61143410971a45f3686f0796823bdd21 (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
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
/* drivers/video/msm_fb/mdp.c
 *
 * MSM MDP Interface (used by framebuffer core)
 *
 * Copyright (C) 2007 QUALCOMM Incorporated
 * Copyright (C) 2007 Google Incorporated
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/msm_mdp.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/clk.h>
#include <linux/file.h>
#include <linux/major.h>
#include <linux/slab.h>

#include <mach/msm_iomap.h>
#include <linux/platform_data/video-msm_fb.h>
#include <linux/platform_device.h>
#include <linux/export.h>

#include "mdp_hw.h"

struct class *mdp_class;

#define MDP_CMD_DEBUG_ACCESS_BASE (0x10000)

static uint16_t mdp_default_ccs[] = {
	0x254, 0x000, 0x331, 0x254, 0xF38, 0xE61, 0x254, 0x409, 0x000,
	0x010, 0x080, 0x080
};

static DECLARE_WAIT_QUEUE_HEAD(mdp_dma2_waitqueue);
static DECLARE_WAIT_QUEUE_HEAD(mdp_ppp_waitqueue);
static struct msmfb_callback *dma_callback;
static struct clk *clk;
static unsigned int mdp_irq_mask;
static DEFINE_SPINLOCK(mdp_lock);
DEFINE_MUTEX(mdp_mutex);

static int enable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
	unsigned long irq_flags;
	int ret = 0;

	BUG_ON(!mask);

	spin_lock_irqsave(&mdp_lock, irq_flags);
	/* if the mask bits are already set return an error, this interrupt
	 * is already enabled */
	if (mdp_irq_mask & mask) {
		printk(KERN_ERR "mdp irq already on already on %x %x\n",
		       mdp_irq_mask, mask);
		ret = -1;
	}
	/* if the mdp irq is not already enabled enable it */
	if (!mdp_irq_mask) {
		if (clk)
			clk_enable(clk);
		enable_irq(mdp->irq);
	}

	/* update the irq mask to reflect the fact that the interrupt is
	 * enabled */
	mdp_irq_mask |= mask;
	spin_unlock_irqrestore(&mdp_lock, irq_flags);
	return ret;
}

static int locked_disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
	/* this interrupt is already disabled! */
	if (!(mdp_irq_mask & mask)) {
		printk(KERN_ERR "mdp irq already off %x %x\n",
		       mdp_irq_mask, mask);
		return -1;
	}
	/* update the irq mask to reflect the fact that the interrupt is
	 * disabled */
	mdp_irq_mask &= ~(mask);
	/* if no one is waiting on the interrupt, disable it */
	if (!mdp_irq_mask) {
		disable_irq_nosync(mdp->irq);
		if (clk)
			clk_disable(clk);
	}
	return 0;
}

static int disable_mdp_irq(struct mdp_info *mdp, uint32_t mask)
{
	unsigned long irq_flags;
	int ret;

	spin_lock_irqsave(&mdp_lock, irq_flags);
	ret = locked_disable_mdp_irq(mdp, mask);
	spin_unlock_irqrestore(&mdp_lock, irq_flags);
	return ret;
}

static irqreturn_t mdp_isr(int irq, void *data)
{
	uint32_t status;
	unsigned long irq_flags;
	struct mdp_info *mdp = data;

	spin_lock_irqsave(&mdp_lock, irq_flags);

	status = mdp_readl(mdp, MDP_INTR_STATUS);
	mdp_writel(mdp, status, MDP_INTR_CLEAR);

	status &= mdp_irq_mask;
	if (status & DL0_DMA2_TERM_DONE) {
		if (dma_callback) {
			dma_callback->func(dma_callback);
			dma_callback = NULL;
		}
		wake_up(&mdp_dma2_waitqueue);
	}

	if (status & DL0_ROI_DONE)
		wake_up(&mdp_ppp_waitqueue);

	if (status)
		locked_disable_mdp_irq(mdp, status);

	spin_unlock_irqrestore(&mdp_lock, irq_flags);
	return IRQ_HANDLED;
}

static uint32_t mdp_check_mask(uint32_t mask)
{
	uint32_t ret;
	unsigned long irq_flags;

	spin_lock_irqsave(&mdp_lock, irq_flags);
	ret = mdp_irq_mask & mask;
	spin_unlock_irqrestore(&mdp_lock, irq_flags);
	return ret;
}

static int mdp_wait(struct mdp_info *mdp, uint32_t mask, wait_queue_head_t *wq)
{
	int ret = 0;
	unsigned long irq_flags;

	wait_event_timeout(*wq, !mdp_check_mask(mask), HZ);

	spin_lock_irqsave(&mdp_lock, irq_flags);
	if (mdp_irq_mask & mask) {
		locked_disable_mdp_irq(mdp, mask);
		printk(KERN_WARNING "timeout waiting for mdp to complete %x\n",
		       mask);
		ret = -ETIMEDOUT;
	}
	spin_unlock_irqrestore(&mdp_lock, irq_flags);

	return ret;
}

void mdp_dma_wait(struct mdp_device *mdp_dev)
{
#define MDP_MAX_TIMEOUTS 20
	static int timeout_count;
	struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);

	if (mdp_wait(mdp, DL0_DMA2_TERM_DONE, &mdp_dma2_waitqueue) == -ETIMEDOUT)
		timeout_count++;
	else
		timeout_count = 0;

	if (timeout_count > MDP_MAX_TIMEOUTS) {
		printk(KERN_ERR "mdp: dma failed %d times, somethings wrong!\n",
		       MDP_MAX_TIMEOUTS);
		BUG();
	}
}

static int mdp_ppp_wait(struct mdp_info *mdp)
{
	return mdp_wait(mdp, DL0_ROI_DONE, &mdp_ppp_waitqueue);
}

void mdp_dma_to_mddi(struct mdp_info *mdp, uint32_t addr, uint32_t stride,
		     uint32_t width, uint32_t height, uint32_t x, uint32_t y,
		     struct msmfb_callback *callback)
{
	uint32_t dma2_cfg;
	uint16_t ld_param = 0; /* 0=PRIM, 1=SECD, 2=EXT */

	if (enable_mdp_irq(mdp, DL0_DMA2_TERM_DONE)) {
		printk(KERN_ERR "mdp_dma_to_mddi: busy\n");
		return;
	}

	dma_callback = callback;

	dma2_cfg = DMA_PACK_TIGHT |
		DMA_PACK_ALIGN_LSB |
		DMA_PACK_PATTERN_RGB |
		DMA_OUT_SEL_AHB |
		DMA_IBUF_NONCONTIGUOUS;

	dma2_cfg |= DMA_IBUF_FORMAT_RGB565;

	dma2_cfg |= DMA_OUT_SEL_MDDI;

	dma2_cfg |= DMA_MDDI_DMAOUT_LCD_SEL_PRIMARY;

	dma2_cfg |= DMA_DITHER_EN;

	/* setup size, address, and stride */
	mdp_writel(mdp, (height << 16) | (width),
		   MDP_CMD_DEBUG_ACCESS_BASE + 0x0184);
	mdp_writel(mdp, addr, MDP_CMD_DEBUG_ACCESS_BASE + 0x0188);
	mdp_writel(mdp, stride, MDP_CMD_DEBUG_ACCESS_BASE + 0x018C);

	/* 666 18BPP */
	dma2_cfg |= DMA_DSTC0G_6BITS | DMA_DSTC1B_6BITS | DMA_DSTC2R_6BITS;

	/* set y & x offset and MDDI transaction parameters */
	mdp_writel(mdp, (y << 16) | (x), MDP_CMD_DEBUG_ACCESS_BASE + 0x0194);
	mdp_writel(mdp, ld_param, MDP_CMD_DEBUG_ACCESS_BASE + 0x01a0);
	mdp_writel(mdp, (MDDI_VDO_PACKET_DESC << 16) | MDDI_VDO_PACKET_PRIM,
		   MDP_CMD_DEBUG_ACCESS_BASE + 0x01a4);

	mdp_writel(mdp, dma2_cfg, MDP_CMD_DEBUG_ACCESS_BASE + 0x0180);

	/* start DMA2 */
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0044);
}

void mdp_dma(struct mdp_device *mdp_dev, uint32_t addr, uint32_t stride,
	     uint32_t width, uint32_t height, uint32_t x, uint32_t y,
	     struct msmfb_callback *callback, int interface)
{
	struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);

	if (interface == MSM_MDDI_PMDH_INTERFACE) {
		mdp_dma_to_mddi(mdp, addr, stride, width, height, x, y,
				callback);
	}
}

int get_img(struct mdp_img *img, struct fb_info *info,
	    unsigned long *start, unsigned long *len,
	    struct file **filep)
{
	int ret = 0;
	struct fd f = fdget(img->memory_id);
	if (f.file == NULL)
		return -1;

	if (MAJOR(f.file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
		*start = info->fix.smem_start;
		*len = info->fix.smem_len;
	} else
		ret = -1;
	fdput(f);

	return ret;
}

void put_img(struct file *src_file, struct file *dst_file)
{
}

int mdp_blit(struct mdp_device *mdp_dev, struct fb_info *fb,
	     struct mdp_blit_req *req)
{
	int ret;
	unsigned long src_start = 0, src_len = 0, dst_start = 0, dst_len = 0;
	struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);
	struct file *src_file = 0, *dst_file = 0;

	/* WORKAROUND FOR HARDWARE BUG IN BG TILE FETCH */
	if (unlikely(req->src_rect.h == 0 ||
		     req->src_rect.w == 0)) {
		printk(KERN_ERR "mpd_ppp: src img of zero size!\n");
		return -EINVAL;
	}
	if (unlikely(req->dst_rect.h == 0 ||
		     req->dst_rect.w == 0))
		return -EINVAL;

	/* do this first so that if this fails, the caller can always
	 * safely call put_img */
	if (unlikely(get_img(&req->src, fb, &src_start, &src_len, &src_file))) {
		printk(KERN_ERR "mpd_ppp: could not retrieve src image from "
				"memory\n");
		return -EINVAL;
	}

	if (unlikely(get_img(&req->dst, fb, &dst_start, &dst_len, &dst_file))) {
		printk(KERN_ERR "mpd_ppp: could not retrieve dst image from "
				"memory\n");
		return -EINVAL;
	}
	mutex_lock(&mdp_mutex);

	/* transp_masking unimplemented */
	req->transp_mask = MDP_TRANSP_NOP;
	if (unlikely((req->transp_mask != MDP_TRANSP_NOP ||
		      req->alpha != MDP_ALPHA_NOP ||
		      HAS_ALPHA(req->src.format)) &&
		     (req->flags & MDP_ROT_90 &&
		      req->dst_rect.w <= 16 && req->dst_rect.h >= 16))) {
		int i;
		unsigned int tiles = req->dst_rect.h / 16;
		unsigned int remainder = req->dst_rect.h % 16;
		req->src_rect.w = 16*req->src_rect.w / req->dst_rect.h;
		req->dst_rect.h = 16;
		for (i = 0; i < tiles; i++) {
			enable_mdp_irq(mdp, DL0_ROI_DONE);
			ret = mdp_ppp_blit(mdp, req, src_file, src_start,
					   src_len, dst_file, dst_start,
					   dst_len);
			if (ret)
				goto err_bad_blit;
			ret = mdp_ppp_wait(mdp);
			if (ret)
				goto err_wait_failed;
			req->dst_rect.y += 16;
			req->src_rect.x += req->src_rect.w;
		}
		if (!remainder)
			goto end;
		req->src_rect.w = remainder*req->src_rect.w / req->dst_rect.h;
		req->dst_rect.h = remainder;
	}
	enable_mdp_irq(mdp, DL0_ROI_DONE);
	ret = mdp_ppp_blit(mdp, req, src_file, src_start, src_len, dst_file,
			   dst_start,
			   dst_len);
	if (ret)
		goto err_bad_blit;
	ret = mdp_ppp_wait(mdp);
	if (ret)
		goto err_wait_failed;
end:
	put_img(src_file, dst_file);
	mutex_unlock(&mdp_mutex);
	return 0;
err_bad_blit:
	disable_mdp_irq(mdp, DL0_ROI_DONE);
err_wait_failed:
	put_img(src_file, dst_file);
	mutex_unlock(&mdp_mutex);
	return ret;
}

void mdp_set_grp_disp(struct mdp_device *mdp_dev, unsigned disp_id)
{
	struct mdp_info *mdp = container_of(mdp_dev, struct mdp_info, mdp_dev);

	disp_id &= 0xf;
	mdp_writel(mdp, disp_id, MDP_FULL_BYPASS_WORD43);
}

int register_mdp_client(struct class_interface *cint)
{
	if (!mdp_class) {
		pr_err("mdp: no mdp_class when registering mdp client\n");
		return -ENODEV;
	}
	cint->class = mdp_class;
	return class_interface_register(cint);
}

#include "mdp_csc_table.h"
#include "mdp_scale_tables.h"

int mdp_probe(struct platform_device *pdev)
{
	struct resource *resource;
	int ret;
	int n;
	struct mdp_info *mdp;

	resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!resource) {
		pr_err("mdp: can not get mdp mem resource!\n");
		return -ENOMEM;
	}

	mdp = kzalloc(sizeof(struct mdp_info), GFP_KERNEL);
	if (!mdp)
		return -ENOMEM;

	mdp->irq = platform_get_irq(pdev, 0);
	if (mdp->irq < 0) {
		pr_err("mdp: can not get mdp irq\n");
		ret = mdp->irq;
		goto error_get_irq;
	}

	mdp->base = ioremap(resource->start, resource_size(resource));
	if (mdp->base == 0) {
		printk(KERN_ERR "msmfb: cannot allocate mdp regs!\n");
		ret = -ENOMEM;
		goto error_ioremap;
	}

	mdp->mdp_dev.dma = mdp_dma;
	mdp->mdp_dev.dma_wait = mdp_dma_wait;
	mdp->mdp_dev.blit = mdp_blit;
	mdp->mdp_dev.set_grp_disp = mdp_set_grp_disp;

	clk = clk_get(&pdev->dev, "mdp_clk");
	if (IS_ERR(clk)) {
		printk(KERN_INFO "mdp: failed to get mdp clk");
		ret = PTR_ERR(clk);
		goto error_get_clk;
	}

	ret = request_irq(mdp->irq, mdp_isr, 0, "msm_mdp", mdp);
	if (ret)
		goto error_request_irq;
	disable_irq(mdp->irq);
	mdp_irq_mask = 0;

	/* debug interface write access */
	mdp_writel(mdp, 1, 0x60);

	mdp_writel(mdp, MDP_ANY_INTR_MASK, MDP_INTR_ENABLE);
	mdp_writel(mdp, 1, MDP_EBI2_PORTMAP_MODE);

	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01f8);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01fc);

	for (n = 0; n < ARRAY_SIZE(csc_table); n++)
		mdp_writel(mdp, csc_table[n].val, csc_table[n].reg);

	/* clear up unused fg/main registers */
	/* comp.plane 2&3 ystride */
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0120);

	/* unpacked pattern */
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x012c);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0130);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0134);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0158);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x015c);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0160);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0170);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0174);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x017c);

	/* comp.plane 2 & 3 */
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0114);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x0118);

	/* clear unused bg registers */
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01c8);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01d0);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01dc);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e0);
	mdp_writel(mdp, 0, MDP_CMD_DEBUG_ACCESS_BASE + 0x01e4);

	for (n = 0; n < ARRAY_SIZE(mdp_upscale_table); n++)
		mdp_writel(mdp, mdp_upscale_table[n].val,
		       mdp_upscale_table[n].reg);

	for (n = 0; n < 9; n++)
		mdp_writel(mdp, mdp_default_ccs[n], 0x40440 + 4 * n);
	mdp_writel(mdp, mdp_default_ccs[9], 0x40500 + 4 * 0);
	mdp_writel(mdp, mdp_default_ccs[10], 0x40500 + 4 * 0);
	mdp_writel(mdp, mdp_default_ccs[11], 0x40500 + 4 * 0);

	/* register mdp device */
	mdp->mdp_dev.dev.parent = &pdev->dev;
	mdp->mdp_dev.dev.class = mdp_class;
	dev_set_name(&mdp->mdp_dev.dev, "mdp%d", pdev->id);

	/* if you can remove the platform device you'd have to implement
	 * this:
	mdp_dev.release = mdp_class; */

	ret = device_register(&mdp->mdp_dev.dev);
	if (ret)
		goto error_device_register;
	return 0;

error_device_register:
	free_irq(mdp->irq, mdp);
error_request_irq:
error_get_clk:
	iounmap(mdp->base);
error_get_irq:
error_ioremap:
	kfree(mdp);
	return ret;
}

static struct platform_driver msm_mdp_driver = {
	.probe = mdp_probe,
	.driver = {.name = "msm_mdp"},
};

static int __init mdp_init(void)
{
	mdp_class = class_create(THIS_MODULE, "msm_mdp");
	if (IS_ERR(mdp_class)) {
		printk(KERN_ERR "Error creating mdp class\n");
		return PTR_ERR(mdp_class);
	}
	return platform_driver_register(&msm_mdp_driver);
}

subsys_initcall(mdp_init);