2 * Copyright (C) 2012 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundationr
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/clk.h>
13 #include <linux/err.h>
14 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
22 #include "exynos_drm.h"
23 #include "exynos_drm_drv.h"
24 #include "exynos_drm_gem.h"
26 #define G2D_HW_MAJOR_VER 4
27 #define G2D_HW_MINOR_VER 1
29 /* vaild register range set from user: 0x0104 ~ 0x0880 */
30 #define G2D_VALID_START 0x0104
31 #define G2D_VALID_END 0x0880
33 /* general registers */
34 #define G2D_SOFT_RESET 0x0000
35 #define G2D_INTEN 0x0004
36 #define G2D_INTC_PEND 0x000C
37 #define G2D_DMA_SFR_BASE_ADDR 0x0080
38 #define G2D_DMA_COMMAND 0x0084
39 #define G2D_DMA_STATUS 0x008C
40 #define G2D_DMA_HOLD_CMD 0x0090
42 /* command registers */
43 #define G2D_BITBLT_START 0x0100
45 /* registers for base address */
46 #define G2D_SRC_BASE_ADDR 0x0304
47 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318
48 #define G2D_DST_BASE_ADDR 0x0404
49 #define G2D_DST_PLANE2_BASE_ADDR 0x0418
50 #define G2D_PAT_BASE_ADDR 0x0500
51 #define G2D_MSK_BASE_ADDR 0x0520
54 #define G2D_SFRCLEAR (1 << 1)
55 #define G2D_R (1 << 0)
58 #define G2D_INTEN_ACF (1 << 3)
59 #define G2D_INTEN_UCF (1 << 2)
60 #define G2D_INTEN_GCF (1 << 1)
61 #define G2D_INTEN_SCF (1 << 0)
64 #define G2D_INTP_ACMD_FIN (1 << 3)
65 #define G2D_INTP_UCMD_FIN (1 << 2)
66 #define G2D_INTP_GCMD_FIN (1 << 1)
67 #define G2D_INTP_SCMD_FIN (1 << 0)
70 #define G2D_DMA_HALT (1 << 2)
71 #define G2D_DMA_CONTINUE (1 << 1)
72 #define G2D_DMA_START (1 << 0)
75 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
76 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
77 #define G2D_DMA_DONE (1 << 0)
78 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
80 /* G2D_DMA_HOLD_CMD */
81 #define G2D_USET_HOLD (1 << 2)
82 #define G2D_LIST_HOLD (1 << 1)
83 #define G2D_BITBLT_HOLD (1 << 0)
85 /* G2D_BITBLT_START */
86 #define G2D_START_CASESEL (1 << 2)
87 #define G2D_START_NHOLT (1 << 1)
88 #define G2D_START_BITBLT (1 << 0)
90 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
91 #define G2D_CMDLIST_NUM 64
92 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
93 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
95 /* cmdlist data structure */
98 u32 data[G2D_CMDLIST_DATA_NUM];
99 u32 last; /* last data offset */
102 struct drm_exynos_pending_g2d_event {
103 struct drm_pending_event base;
104 struct drm_exynos_g2d_event event;
107 struct g2d_gem_node {
108 struct list_head list;
112 struct g2d_cmdlist_node {
113 struct list_head list;
114 struct g2d_cmdlist *cmdlist;
118 struct drm_exynos_pending_g2d_event *event;
121 struct g2d_runqueue_node {
122 struct list_head list;
123 struct list_head run_cmdlist;
124 struct list_head event_list;
125 struct completion complete;
131 struct clk *gate_clk;
134 struct workqueue_struct *g2d_workq;
135 struct work_struct runqueue_work;
136 struct exynos_drm_subdrv subdrv;
140 struct g2d_cmdlist_node *cmdlist_node;
141 struct list_head free_cmdlist;
142 struct mutex cmdlist_mutex;
143 dma_addr_t cmdlist_pool;
144 void *cmdlist_pool_virt;
147 struct g2d_runqueue_node *runqueue_node;
148 struct list_head runqueue;
149 struct mutex runqueue_mutex;
150 struct kmem_cache *runqueue_slab;
153 static int g2d_init_cmdlist(struct g2d_data *g2d)
155 struct device *dev = g2d->dev;
156 struct g2d_cmdlist_node *node = g2d->cmdlist_node;
160 g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE,
161 &g2d->cmdlist_pool, GFP_KERNEL);
162 if (!g2d->cmdlist_pool_virt) {
163 dev_err(dev, "failed to allocate dma memory\n");
167 node = kcalloc(G2D_CMDLIST_NUM, G2D_CMDLIST_NUM * sizeof(*node),
170 dev_err(dev, "failed to allocate memory\n");
175 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
177 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
179 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
181 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
187 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
192 static void g2d_fini_cmdlist(struct g2d_data *g2d)
194 struct device *dev = g2d->dev;
196 kfree(g2d->cmdlist_node);
197 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
201 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
203 struct device *dev = g2d->dev;
204 struct g2d_cmdlist_node *node;
206 mutex_lock(&g2d->cmdlist_mutex);
207 if (list_empty(&g2d->free_cmdlist)) {
208 dev_err(dev, "there is no free cmdlist\n");
209 mutex_unlock(&g2d->cmdlist_mutex);
213 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
215 list_del_init(&node->list);
216 mutex_unlock(&g2d->cmdlist_mutex);
221 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
223 mutex_lock(&g2d->cmdlist_mutex);
224 list_move_tail(&node->list, &g2d->free_cmdlist);
225 mutex_unlock(&g2d->cmdlist_mutex);
228 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
229 struct g2d_cmdlist_node *node)
231 struct g2d_cmdlist_node *lnode;
233 if (list_empty(&g2d_priv->inuse_cmdlist))
236 /* this links to base address of new cmdlist */
237 lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
238 struct g2d_cmdlist_node, list);
239 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
242 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
245 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
248 static int g2d_get_cmdlist_gem(struct drm_device *drm_dev,
249 struct drm_file *file,
250 struct g2d_cmdlist_node *node)
252 struct drm_exynos_file_private *file_priv = file->driver_priv;
253 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
254 struct g2d_cmdlist *cmdlist = node->cmdlist;
259 for (i = 0; i < node->gem_nr; i++) {
260 struct g2d_gem_node *gem_node;
262 gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL);
264 dev_err(g2d_priv->dev, "failed to allocate gem node\n");
268 offset = cmdlist->last - (i * 2 + 1);
269 gem_node->handle = cmdlist->data[offset];
271 addr = exynos_drm_gem_get_dma_addr(drm_dev, gem_node->handle,
276 return PTR_ERR(addr);
279 cmdlist->data[offset] = *addr;
280 list_add_tail(&gem_node->list, &g2d_priv->gem_list);
287 static void g2d_put_cmdlist_gem(struct drm_device *drm_dev,
288 struct drm_file *file,
291 struct drm_exynos_file_private *file_priv = file->driver_priv;
292 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
293 struct g2d_gem_node *node, *n;
295 list_for_each_entry_safe_reverse(node, n, &g2d_priv->gem_list, list) {
299 exynos_drm_gem_put_dma_addr(drm_dev, node->handle, file);
300 list_del_init(&node->list);
306 static void g2d_dma_start(struct g2d_data *g2d,
307 struct g2d_runqueue_node *runqueue_node)
309 struct g2d_cmdlist_node *node =
310 list_first_entry(&runqueue_node->run_cmdlist,
311 struct g2d_cmdlist_node, list);
313 pm_runtime_get_sync(g2d->dev);
314 clk_enable(g2d->gate_clk);
316 /* interrupt enable */
317 writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF,
318 g2d->regs + G2D_INTEN);
320 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
321 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
324 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
326 struct g2d_runqueue_node *runqueue_node;
328 if (list_empty(&g2d->runqueue))
331 runqueue_node = list_first_entry(&g2d->runqueue,
332 struct g2d_runqueue_node, list);
333 list_del_init(&runqueue_node->list);
334 return runqueue_node;
337 static void g2d_free_runqueue_node(struct g2d_data *g2d,
338 struct g2d_runqueue_node *runqueue_node)
343 mutex_lock(&g2d->cmdlist_mutex);
344 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
345 mutex_unlock(&g2d->cmdlist_mutex);
347 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
350 static void g2d_exec_runqueue(struct g2d_data *g2d)
352 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
353 if (g2d->runqueue_node)
354 g2d_dma_start(g2d, g2d->runqueue_node);
357 static void g2d_runqueue_worker(struct work_struct *work)
359 struct g2d_data *g2d = container_of(work, struct g2d_data,
363 mutex_lock(&g2d->runqueue_mutex);
364 clk_disable(g2d->gate_clk);
365 pm_runtime_put_sync(g2d->dev);
367 complete(&g2d->runqueue_node->complete);
368 if (g2d->runqueue_node->async)
369 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
372 g2d->runqueue_node = NULL;
374 g2d_exec_runqueue(g2d);
375 mutex_unlock(&g2d->runqueue_mutex);
378 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
380 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
381 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
382 struct drm_exynos_pending_g2d_event *e;
386 if (list_empty(&runqueue_node->event_list))
389 e = list_first_entry(&runqueue_node->event_list,
390 struct drm_exynos_pending_g2d_event, base.link);
392 do_gettimeofday(&now);
393 e->event.tv_sec = now.tv_sec;
394 e->event.tv_usec = now.tv_usec;
395 e->event.cmdlist_no = cmdlist_no;
397 spin_lock_irqsave(&drm_dev->event_lock, flags);
398 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
399 wake_up_interruptible(&e->base.file_priv->event_wait);
400 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
403 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
405 struct g2d_data *g2d = dev_id;
408 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
410 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
412 if (pending & G2D_INTP_GCMD_FIN) {
413 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
415 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
416 G2D_DMA_LIST_DONE_COUNT_OFFSET;
418 g2d_finish_event(g2d, cmdlist_no);
420 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
421 if (!(pending & G2D_INTP_ACMD_FIN)) {
422 writel_relaxed(G2D_DMA_CONTINUE,
423 g2d->regs + G2D_DMA_COMMAND);
427 if (pending & G2D_INTP_ACMD_FIN)
428 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
433 static int g2d_check_reg_offset(struct device *dev, struct g2d_cmdlist *cmdlist,
434 int nr, bool for_addr)
440 for (i = 0; i < nr; i++) {
441 index = cmdlist->last - 2 * (i + 1);
442 reg_offset = cmdlist->data[index] & ~0xfffff000;
444 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
449 switch (reg_offset) {
450 case G2D_SRC_BASE_ADDR:
451 case G2D_SRC_PLANE2_BASE_ADDR:
452 case G2D_DST_BASE_ADDR:
453 case G2D_DST_PLANE2_BASE_ADDR:
454 case G2D_PAT_BASE_ADDR:
455 case G2D_MSK_BASE_ADDR:
469 dev_err(dev, "Bad register offset: 0x%x\n", cmdlist->data[index]);
473 /* ioctl functions */
474 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
475 struct drm_file *file)
477 struct drm_exynos_g2d_get_ver *ver = data;
479 ver->major = G2D_HW_MAJOR_VER;
480 ver->minor = G2D_HW_MINOR_VER;
484 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
486 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
487 struct drm_file *file)
489 struct drm_exynos_file_private *file_priv = file->driver_priv;
490 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
491 struct device *dev = g2d_priv->dev;
492 struct g2d_data *g2d;
493 struct drm_exynos_g2d_set_cmdlist *req = data;
494 struct drm_exynos_g2d_cmd *cmd;
495 struct drm_exynos_pending_g2d_event *e;
496 struct g2d_cmdlist_node *node;
497 struct g2d_cmdlist *cmdlist;
505 g2d = dev_get_drvdata(dev);
509 node = g2d_get_cmdlist(g2d);
515 if (req->event_type != G2D_EVENT_NOT) {
516 spin_lock_irqsave(&drm_dev->event_lock, flags);
517 if (file->event_space < sizeof(e->event)) {
518 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
522 file->event_space -= sizeof(e->event);
523 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
525 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
527 dev_err(dev, "failed to allocate event\n");
529 spin_lock_irqsave(&drm_dev->event_lock, flags);
530 file->event_space += sizeof(e->event);
531 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
537 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
538 e->event.base.length = sizeof(e->event);
539 e->event.user_data = req->user_data;
540 e->base.event = &e->event.base;
541 e->base.file_priv = file;
542 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
547 cmdlist = node->cmdlist;
552 * If don't clear SFR registers, the cmdlist is affected by register
553 * values of previous cmdlist. G2D hw executes SFR clear command and
554 * a next command at the same time then the next command is ignored and
555 * is executed rightly from next next command, so needs a dummy command
556 * to next command of SFR clear command.
558 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
559 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
560 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
561 cmdlist->data[cmdlist->last++] = 0;
564 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
565 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
568 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
569 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_gem_nr * 2 + 2;
570 if (size > G2D_CMDLIST_DATA_NUM) {
571 dev_err(dev, "cmdlist size is too big\n");
576 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
578 if (copy_from_user(cmdlist->data + cmdlist->last,
580 sizeof(*cmd) * req->cmd_nr)) {
584 cmdlist->last += req->cmd_nr * 2;
586 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_nr, false);
590 node->gem_nr = req->cmd_gem_nr;
591 if (req->cmd_gem_nr) {
592 struct drm_exynos_g2d_cmd *cmd_gem;
594 cmd_gem = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_gem;
596 if (copy_from_user(cmdlist->data + cmdlist->last,
597 (void __user *)cmd_gem,
598 sizeof(*cmd_gem) * req->cmd_gem_nr)) {
602 cmdlist->last += req->cmd_gem_nr * 2;
604 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_gem_nr, true);
608 ret = g2d_get_cmdlist_gem(drm_dev, file, node);
613 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
614 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
617 cmdlist->head = cmdlist->last / 2;
620 cmdlist->data[cmdlist->last] = 0;
622 g2d_add_cmdlist_to_inuse(g2d_priv, node);
627 g2d_put_cmdlist_gem(drm_dev, file, node->gem_nr);
630 spin_lock_irqsave(&drm_dev->event_lock, flags);
631 file->event_space += sizeof(e->event);
632 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
636 g2d_put_cmdlist(g2d, node);
639 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
641 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
642 struct drm_file *file)
644 struct drm_exynos_file_private *file_priv = file->driver_priv;
645 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
646 struct device *dev = g2d_priv->dev;
647 struct g2d_data *g2d;
648 struct drm_exynos_g2d_exec *req = data;
649 struct g2d_runqueue_node *runqueue_node;
650 struct list_head *run_cmdlist;
651 struct list_head *event_list;
656 g2d = dev_get_drvdata(dev);
660 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
661 if (!runqueue_node) {
662 dev_err(dev, "failed to allocate memory\n");
665 run_cmdlist = &runqueue_node->run_cmdlist;
666 event_list = &runqueue_node->event_list;
667 INIT_LIST_HEAD(run_cmdlist);
668 INIT_LIST_HEAD(event_list);
669 init_completion(&runqueue_node->complete);
670 runqueue_node->async = req->async;
672 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
673 list_splice_init(&g2d_priv->event_list, event_list);
675 if (list_empty(run_cmdlist)) {
676 dev_err(dev, "there is no inuse cmdlist\n");
677 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
681 mutex_lock(&g2d->runqueue_mutex);
682 list_add_tail(&runqueue_node->list, &g2d->runqueue);
683 if (!g2d->runqueue_node)
684 g2d_exec_runqueue(g2d);
685 mutex_unlock(&g2d->runqueue_mutex);
687 if (runqueue_node->async)
690 wait_for_completion(&runqueue_node->complete);
691 g2d_free_runqueue_node(g2d, runqueue_node);
696 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
698 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
699 struct drm_file *file)
701 struct drm_exynos_file_private *file_priv = file->driver_priv;
702 struct exynos_drm_g2d_private *g2d_priv;
704 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
706 dev_err(dev, "failed to allocate g2d private data\n");
711 file_priv->g2d_priv = g2d_priv;
713 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
714 INIT_LIST_HEAD(&g2d_priv->event_list);
715 INIT_LIST_HEAD(&g2d_priv->gem_list);
720 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
721 struct drm_file *file)
723 struct drm_exynos_file_private *file_priv = file->driver_priv;
724 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
725 struct g2d_data *g2d;
726 struct g2d_cmdlist_node *node, *n;
731 g2d = dev_get_drvdata(dev);
735 mutex_lock(&g2d->cmdlist_mutex);
736 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list)
737 list_move_tail(&node->list, &g2d->free_cmdlist);
738 mutex_unlock(&g2d->cmdlist_mutex);
740 g2d_put_cmdlist_gem(drm_dev, file, g2d_priv->gem_nr);
742 kfree(file_priv->g2d_priv);
745 static int __devinit g2d_probe(struct platform_device *pdev)
747 struct device *dev = &pdev->dev;
748 struct resource *res;
749 struct g2d_data *g2d;
750 struct exynos_drm_subdrv *subdrv;
753 g2d = devm_kzalloc(&pdev->dev, sizeof(*g2d), GFP_KERNEL);
755 dev_err(dev, "failed to allocate driver data\n");
759 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
760 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
761 if (!g2d->runqueue_slab)
766 g2d->g2d_workq = create_singlethread_workqueue("g2d");
767 if (!g2d->g2d_workq) {
768 dev_err(dev, "failed to create workqueue\n");
770 goto err_destroy_slab;
773 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
774 INIT_LIST_HEAD(&g2d->free_cmdlist);
775 INIT_LIST_HEAD(&g2d->runqueue);
777 mutex_init(&g2d->cmdlist_mutex);
778 mutex_init(&g2d->runqueue_mutex);
780 ret = g2d_init_cmdlist(g2d);
782 goto err_destroy_workqueue;
784 g2d->gate_clk = clk_get(dev, "fimg2d");
785 if (IS_ERR(g2d->gate_clk)) {
786 dev_err(dev, "failed to get gate clock\n");
787 ret = PTR_ERR(g2d->gate_clk);
788 goto err_fini_cmdlist;
791 pm_runtime_enable(dev);
793 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
795 g2d->regs = devm_request_and_ioremap(&pdev->dev, res);
797 dev_err(dev, "failed to remap I/O memory\n");
802 g2d->irq = platform_get_irq(pdev, 0);
804 dev_err(dev, "failed to get irq\n");
809 ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0,
812 dev_err(dev, "irq request failed\n");
816 platform_set_drvdata(pdev, g2d);
818 subdrv = &g2d->subdrv;
820 subdrv->open = g2d_open;
821 subdrv->close = g2d_close;
823 ret = exynos_drm_subdrv_register(subdrv);
825 dev_err(dev, "failed to register drm g2d device\n");
829 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
830 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
835 pm_runtime_disable(dev);
836 clk_put(g2d->gate_clk);
838 g2d_fini_cmdlist(g2d);
839 err_destroy_workqueue:
840 destroy_workqueue(g2d->g2d_workq);
842 kmem_cache_destroy(g2d->runqueue_slab);
846 static int __devexit g2d_remove(struct platform_device *pdev)
848 struct g2d_data *g2d = platform_get_drvdata(pdev);
850 cancel_work_sync(&g2d->runqueue_work);
851 exynos_drm_subdrv_unregister(&g2d->subdrv);
853 while (g2d->runqueue_node) {
854 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
855 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
858 pm_runtime_disable(&pdev->dev);
859 clk_put(g2d->gate_clk);
861 g2d_fini_cmdlist(g2d);
862 destroy_workqueue(g2d->g2d_workq);
863 kmem_cache_destroy(g2d->runqueue_slab);
868 #ifdef CONFIG_PM_SLEEP
869 static int g2d_suspend(struct device *dev)
871 struct g2d_data *g2d = dev_get_drvdata(dev);
873 mutex_lock(&g2d->runqueue_mutex);
874 g2d->suspended = true;
875 mutex_unlock(&g2d->runqueue_mutex);
877 while (g2d->runqueue_node)
878 /* FIXME: good range? */
879 usleep_range(500, 1000);
881 flush_work_sync(&g2d->runqueue_work);
886 static int g2d_resume(struct device *dev)
888 struct g2d_data *g2d = dev_get_drvdata(dev);
890 g2d->suspended = false;
891 g2d_exec_runqueue(g2d);
897 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
899 struct platform_driver g2d_driver = {
901 .remove = __devexit_p(g2d_remove),
904 .owner = THIS_MODULE,