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;
132 struct resource *regs_res;
135 struct workqueue_struct *g2d_workq;
136 struct work_struct runqueue_work;
137 struct exynos_drm_subdrv subdrv;
141 struct g2d_cmdlist_node *cmdlist_node;
142 struct list_head free_cmdlist;
143 struct mutex cmdlist_mutex;
144 dma_addr_t cmdlist_pool;
145 void *cmdlist_pool_virt;
148 struct g2d_runqueue_node *runqueue_node;
149 struct list_head runqueue;
150 struct mutex runqueue_mutex;
151 struct kmem_cache *runqueue_slab;
154 static int g2d_init_cmdlist(struct g2d_data *g2d)
156 struct device *dev = g2d->dev;
157 struct g2d_cmdlist_node *node = g2d->cmdlist_node;
161 g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE,
162 &g2d->cmdlist_pool, GFP_KERNEL);
163 if (!g2d->cmdlist_pool_virt) {
164 dev_err(dev, "failed to allocate dma memory\n");
168 node = kcalloc(G2D_CMDLIST_NUM, G2D_CMDLIST_NUM * sizeof(*node),
171 dev_err(dev, "failed to allocate memory\n");
176 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
178 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
180 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
182 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
188 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
193 static void g2d_fini_cmdlist(struct g2d_data *g2d)
195 struct device *dev = g2d->dev;
197 kfree(g2d->cmdlist_node);
198 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
202 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
204 struct device *dev = g2d->dev;
205 struct g2d_cmdlist_node *node;
207 mutex_lock(&g2d->cmdlist_mutex);
208 if (list_empty(&g2d->free_cmdlist)) {
209 dev_err(dev, "there is no free cmdlist\n");
210 mutex_unlock(&g2d->cmdlist_mutex);
214 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
216 list_del_init(&node->list);
217 mutex_unlock(&g2d->cmdlist_mutex);
222 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
224 mutex_lock(&g2d->cmdlist_mutex);
225 list_move_tail(&node->list, &g2d->free_cmdlist);
226 mutex_unlock(&g2d->cmdlist_mutex);
229 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
230 struct g2d_cmdlist_node *node)
232 struct g2d_cmdlist_node *lnode;
234 if (list_empty(&g2d_priv->inuse_cmdlist))
237 /* this links to base address of new cmdlist */
238 lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
239 struct g2d_cmdlist_node, list);
240 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
243 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
246 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
249 static int g2d_get_cmdlist_gem(struct drm_device *drm_dev,
250 struct drm_file *file,
251 struct g2d_cmdlist_node *node)
253 struct drm_exynos_file_private *file_priv = file->driver_priv;
254 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
255 struct g2d_cmdlist *cmdlist = node->cmdlist;
260 for (i = 0; i < node->gem_nr; i++) {
261 struct g2d_gem_node *gem_node;
263 gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL);
265 dev_err(g2d_priv->dev, "failed to allocate gem node\n");
269 offset = cmdlist->last - (i * 2 + 1);
270 gem_node->handle = cmdlist->data[offset];
272 addr = exynos_drm_gem_get_dma_addr(drm_dev, gem_node->handle,
277 return PTR_ERR(addr);
280 cmdlist->data[offset] = *addr;
281 list_add_tail(&gem_node->list, &g2d_priv->gem_list);
288 static void g2d_put_cmdlist_gem(struct drm_device *drm_dev,
289 struct drm_file *file,
292 struct drm_exynos_file_private *file_priv = file->driver_priv;
293 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
294 struct g2d_gem_node *node, *n;
296 list_for_each_entry_safe_reverse(node, n, &g2d_priv->gem_list, list) {
300 exynos_drm_gem_put_dma_addr(drm_dev, node->handle, file);
301 list_del_init(&node->list);
307 static void g2d_dma_start(struct g2d_data *g2d,
308 struct g2d_runqueue_node *runqueue_node)
310 struct g2d_cmdlist_node *node =
311 list_first_entry(&runqueue_node->run_cmdlist,
312 struct g2d_cmdlist_node, list);
314 pm_runtime_get_sync(g2d->dev);
315 clk_enable(g2d->gate_clk);
317 /* interrupt enable */
318 writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF,
319 g2d->regs + G2D_INTEN);
321 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
322 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
325 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
327 struct g2d_runqueue_node *runqueue_node;
329 if (list_empty(&g2d->runqueue))
332 runqueue_node = list_first_entry(&g2d->runqueue,
333 struct g2d_runqueue_node, list);
334 list_del_init(&runqueue_node->list);
335 return runqueue_node;
338 static void g2d_free_runqueue_node(struct g2d_data *g2d,
339 struct g2d_runqueue_node *runqueue_node)
344 mutex_lock(&g2d->cmdlist_mutex);
345 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
346 mutex_unlock(&g2d->cmdlist_mutex);
348 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
351 static void g2d_exec_runqueue(struct g2d_data *g2d)
353 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
354 if (g2d->runqueue_node)
355 g2d_dma_start(g2d, g2d->runqueue_node);
358 static void g2d_runqueue_worker(struct work_struct *work)
360 struct g2d_data *g2d = container_of(work, struct g2d_data,
364 mutex_lock(&g2d->runqueue_mutex);
365 clk_disable(g2d->gate_clk);
366 pm_runtime_put_sync(g2d->dev);
368 complete(&g2d->runqueue_node->complete);
369 if (g2d->runqueue_node->async)
370 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
373 g2d->runqueue_node = NULL;
375 g2d_exec_runqueue(g2d);
376 mutex_unlock(&g2d->runqueue_mutex);
379 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
381 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
382 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
383 struct drm_exynos_pending_g2d_event *e;
387 if (list_empty(&runqueue_node->event_list))
390 e = list_first_entry(&runqueue_node->event_list,
391 struct drm_exynos_pending_g2d_event, base.link);
393 do_gettimeofday(&now);
394 e->event.tv_sec = now.tv_sec;
395 e->event.tv_usec = now.tv_usec;
396 e->event.cmdlist_no = cmdlist_no;
398 spin_lock_irqsave(&drm_dev->event_lock, flags);
399 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
400 wake_up_interruptible(&e->base.file_priv->event_wait);
401 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
404 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
406 struct g2d_data *g2d = dev_id;
409 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
411 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
413 if (pending & G2D_INTP_GCMD_FIN) {
414 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
416 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
417 G2D_DMA_LIST_DONE_COUNT_OFFSET;
419 g2d_finish_event(g2d, cmdlist_no);
421 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
422 if (!(pending & G2D_INTP_ACMD_FIN)) {
423 writel_relaxed(G2D_DMA_CONTINUE,
424 g2d->regs + G2D_DMA_COMMAND);
428 if (pending & G2D_INTP_ACMD_FIN)
429 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
434 static int g2d_check_reg_offset(struct device *dev, struct g2d_cmdlist *cmdlist,
435 int nr, bool for_addr)
441 for (i = 0; i < nr; i++) {
442 index = cmdlist->last - 2 * (i + 1);
443 reg_offset = cmdlist->data[index] & ~0xfffff000;
445 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
450 switch (reg_offset) {
451 case G2D_SRC_BASE_ADDR:
452 case G2D_SRC_PLANE2_BASE_ADDR:
453 case G2D_DST_BASE_ADDR:
454 case G2D_DST_PLANE2_BASE_ADDR:
455 case G2D_PAT_BASE_ADDR:
456 case G2D_MSK_BASE_ADDR:
470 dev_err(dev, "Bad register offset: 0x%x\n", cmdlist->data[index]);
474 /* ioctl functions */
475 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
476 struct drm_file *file)
478 struct drm_exynos_g2d_get_ver *ver = data;
480 ver->major = G2D_HW_MAJOR_VER;
481 ver->minor = G2D_HW_MINOR_VER;
485 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
487 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
488 struct drm_file *file)
490 struct drm_exynos_file_private *file_priv = file->driver_priv;
491 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
492 struct device *dev = g2d_priv->dev;
493 struct g2d_data *g2d;
494 struct drm_exynos_g2d_set_cmdlist *req = data;
495 struct drm_exynos_g2d_cmd *cmd;
496 struct drm_exynos_pending_g2d_event *e;
497 struct g2d_cmdlist_node *node;
498 struct g2d_cmdlist *cmdlist;
506 g2d = dev_get_drvdata(dev);
510 node = g2d_get_cmdlist(g2d);
516 if (req->event_type != G2D_EVENT_NOT) {
517 spin_lock_irqsave(&drm_dev->event_lock, flags);
518 if (file->event_space < sizeof(e->event)) {
519 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
523 file->event_space -= sizeof(e->event);
524 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
526 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
528 dev_err(dev, "failed to allocate event\n");
530 spin_lock_irqsave(&drm_dev->event_lock, flags);
531 file->event_space += sizeof(e->event);
532 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
538 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
539 e->event.base.length = sizeof(e->event);
540 e->event.user_data = req->user_data;
541 e->base.event = &e->event.base;
542 e->base.file_priv = file;
543 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
548 cmdlist = node->cmdlist;
553 * If don't clear SFR registers, the cmdlist is affected by register
554 * values of previous cmdlist. G2D hw executes SFR clear command and
555 * a next command at the same time then the next command is ignored and
556 * is executed rightly from next next command, so needs a dummy command
557 * to next command of SFR clear command.
559 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
560 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
561 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
562 cmdlist->data[cmdlist->last++] = 0;
565 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
566 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
569 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
570 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_gem_nr * 2 + 2;
571 if (size > G2D_CMDLIST_DATA_NUM) {
572 dev_err(dev, "cmdlist size is too big\n");
577 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
579 if (copy_from_user(cmdlist->data + cmdlist->last,
581 sizeof(*cmd) * req->cmd_nr)) {
585 cmdlist->last += req->cmd_nr * 2;
587 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_nr, false);
591 node->gem_nr = req->cmd_gem_nr;
592 if (req->cmd_gem_nr) {
593 struct drm_exynos_g2d_cmd *cmd_gem;
595 cmd_gem = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_gem;
597 if (copy_from_user(cmdlist->data + cmdlist->last,
598 (void __user *)cmd_gem,
599 sizeof(*cmd_gem) * req->cmd_gem_nr)) {
603 cmdlist->last += req->cmd_gem_nr * 2;
605 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_gem_nr, true);
609 ret = g2d_get_cmdlist_gem(drm_dev, file, node);
614 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
615 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
618 cmdlist->head = cmdlist->last / 2;
621 cmdlist->data[cmdlist->last] = 0;
623 g2d_add_cmdlist_to_inuse(g2d_priv, node);
628 g2d_put_cmdlist_gem(drm_dev, file, node->gem_nr);
631 spin_lock_irqsave(&drm_dev->event_lock, flags);
632 file->event_space += sizeof(e->event);
633 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
637 g2d_put_cmdlist(g2d, node);
640 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
642 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
643 struct drm_file *file)
645 struct drm_exynos_file_private *file_priv = file->driver_priv;
646 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
647 struct device *dev = g2d_priv->dev;
648 struct g2d_data *g2d;
649 struct drm_exynos_g2d_exec *req = data;
650 struct g2d_runqueue_node *runqueue_node;
651 struct list_head *run_cmdlist;
652 struct list_head *event_list;
657 g2d = dev_get_drvdata(dev);
661 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
662 if (!runqueue_node) {
663 dev_err(dev, "failed to allocate memory\n");
666 run_cmdlist = &runqueue_node->run_cmdlist;
667 event_list = &runqueue_node->event_list;
668 INIT_LIST_HEAD(run_cmdlist);
669 INIT_LIST_HEAD(event_list);
670 init_completion(&runqueue_node->complete);
671 runqueue_node->async = req->async;
673 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
674 list_splice_init(&g2d_priv->event_list, event_list);
676 if (list_empty(run_cmdlist)) {
677 dev_err(dev, "there is no inuse cmdlist\n");
678 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
682 mutex_lock(&g2d->runqueue_mutex);
683 list_add_tail(&runqueue_node->list, &g2d->runqueue);
684 if (!g2d->runqueue_node)
685 g2d_exec_runqueue(g2d);
686 mutex_unlock(&g2d->runqueue_mutex);
688 if (runqueue_node->async)
691 wait_for_completion(&runqueue_node->complete);
692 g2d_free_runqueue_node(g2d, runqueue_node);
697 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
699 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
700 struct drm_file *file)
702 struct drm_exynos_file_private *file_priv = file->driver_priv;
703 struct exynos_drm_g2d_private *g2d_priv;
705 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
707 dev_err(dev, "failed to allocate g2d private data\n");
712 file_priv->g2d_priv = g2d_priv;
714 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
715 INIT_LIST_HEAD(&g2d_priv->event_list);
716 INIT_LIST_HEAD(&g2d_priv->gem_list);
721 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
722 struct drm_file *file)
724 struct drm_exynos_file_private *file_priv = file->driver_priv;
725 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
726 struct g2d_data *g2d;
727 struct g2d_cmdlist_node *node, *n;
732 g2d = dev_get_drvdata(dev);
736 mutex_lock(&g2d->cmdlist_mutex);
737 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list)
738 list_move_tail(&node->list, &g2d->free_cmdlist);
739 mutex_unlock(&g2d->cmdlist_mutex);
741 g2d_put_cmdlist_gem(drm_dev, file, g2d_priv->gem_nr);
743 kfree(file_priv->g2d_priv);
746 static int __devinit g2d_probe(struct platform_device *pdev)
748 struct device *dev = &pdev->dev;
749 struct resource *res;
750 struct g2d_data *g2d;
751 struct exynos_drm_subdrv *subdrv;
754 g2d = kzalloc(sizeof(*g2d), GFP_KERNEL);
756 dev_err(dev, "failed to allocate driver data\n");
760 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
761 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
762 if (!g2d->runqueue_slab) {
769 g2d->g2d_workq = create_singlethread_workqueue("g2d");
770 if (!g2d->g2d_workq) {
771 dev_err(dev, "failed to create workqueue\n");
773 goto err_destroy_slab;
776 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
777 INIT_LIST_HEAD(&g2d->free_cmdlist);
778 INIT_LIST_HEAD(&g2d->runqueue);
780 mutex_init(&g2d->cmdlist_mutex);
781 mutex_init(&g2d->runqueue_mutex);
783 ret = g2d_init_cmdlist(g2d);
785 goto err_destroy_workqueue;
787 g2d->gate_clk = clk_get(dev, "fimg2d");
788 if (IS_ERR(g2d->gate_clk)) {
789 dev_err(dev, "failed to get gate clock\n");
790 ret = PTR_ERR(g2d->gate_clk);
791 goto err_fini_cmdlist;
794 pm_runtime_enable(dev);
796 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
798 dev_err(dev, "failed to get I/O memory\n");
803 g2d->regs_res = request_mem_region(res->start, resource_size(res),
805 if (!g2d->regs_res) {
806 dev_err(dev, "failed to request I/O memory\n");
811 g2d->regs = ioremap(res->start, resource_size(res));
813 dev_err(dev, "failed to remap I/O memory\n");
815 goto err_release_res;
818 g2d->irq = platform_get_irq(pdev, 0);
820 dev_err(dev, "failed to get irq\n");
825 ret = request_irq(g2d->irq, g2d_irq_handler, 0, "drm_g2d", g2d);
827 dev_err(dev, "irq request failed\n");
831 platform_set_drvdata(pdev, g2d);
833 subdrv = &g2d->subdrv;
835 subdrv->open = g2d_open;
836 subdrv->close = g2d_close;
838 ret = exynos_drm_subdrv_register(subdrv);
840 dev_err(dev, "failed to register drm g2d device\n");
844 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
845 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
850 free_irq(g2d->irq, g2d);
854 release_resource(g2d->regs_res);
855 kfree(g2d->regs_res);
857 pm_runtime_disable(dev);
858 clk_put(g2d->gate_clk);
860 g2d_fini_cmdlist(g2d);
861 err_destroy_workqueue:
862 destroy_workqueue(g2d->g2d_workq);
864 kmem_cache_destroy(g2d->runqueue_slab);
870 static int __devexit g2d_remove(struct platform_device *pdev)
872 struct g2d_data *g2d = platform_get_drvdata(pdev);
874 cancel_work_sync(&g2d->runqueue_work);
875 exynos_drm_subdrv_unregister(&g2d->subdrv);
876 free_irq(g2d->irq, g2d);
878 while (g2d->runqueue_node) {
879 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
880 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
884 release_resource(g2d->regs_res);
885 kfree(g2d->regs_res);
887 pm_runtime_disable(&pdev->dev);
888 clk_put(g2d->gate_clk);
890 g2d_fini_cmdlist(g2d);
891 destroy_workqueue(g2d->g2d_workq);
892 kmem_cache_destroy(g2d->runqueue_slab);
898 #ifdef CONFIG_PM_SLEEP
899 static int g2d_suspend(struct device *dev)
901 struct g2d_data *g2d = dev_get_drvdata(dev);
903 mutex_lock(&g2d->runqueue_mutex);
904 g2d->suspended = true;
905 mutex_unlock(&g2d->runqueue_mutex);
907 while (g2d->runqueue_node)
908 /* FIXME: good range? */
909 usleep_range(500, 1000);
911 flush_work_sync(&g2d->runqueue_work);
916 static int g2d_resume(struct device *dev)
918 struct g2d_data *g2d = dev_get_drvdata(dev);
920 g2d->suspended = false;
921 g2d_exec_runqueue(g2d);
927 SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
929 struct platform_driver g2d_driver = {
931 .remove = __devexit_p(g2d_remove),
934 .owner = THIS_MODULE,