2 * Copyright (C) 2012 Samsung Electronics Co.Ltd
4 * Eunchul Kim <chulspro.kim@samsung.com>
5 * Jinyoung Jeon <jy0.jeon@samsung.com>
6 * Sangmin Lee <lsmin.lee@samsung.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/platform_device.h>
16 #include <linux/types.h>
17 #include <linux/clk.h>
18 #include <linux/pm_runtime.h>
21 #include <drm/exynos_drm.h>
22 #include "exynos_drm_drv.h"
23 #include "exynos_drm_gem.h"
24 #include "exynos_drm_ipp.h"
25 #include "exynos_drm_iommu.h"
28 * IPP stands for Image Post Processing and
29 * supports image scaler/rotator and input/output DMA operations.
30 * using FIMC, GSC, Rotator, so on.
31 * IPP is integration device driver of same attribute h/w
36 * 1. expand command control id.
37 * 2. integrate property and config.
38 * 3. removed send_event id check routine.
39 * 4. compare send_event id if needed.
40 * 5. free subdrv_remove notifier callback list if needed.
41 * 6. need to check subdrv_open about multi-open.
42 * 7. need to power_on implement power and sysmmu ctrl.
45 #define get_ipp_context(dev) platform_get_drvdata(to_platform_device(dev))
46 #define ipp_is_m2m_cmd(c) (c == IPP_CMD_M2M)
48 /* platform device pointer for ipp device. */
49 static struct platform_device *exynos_drm_ipp_pdev;
52 * A structure of event.
54 * @base: base of event.
57 struct drm_exynos_ipp_send_event {
58 struct drm_pending_event base;
59 struct drm_exynos_ipp_event event;
63 * A structure of memory node.
65 * @list: list head to memory queue information.
66 * @ops_id: id of operations.
67 * @prop_id: id of property.
68 * @buf_id: id of buffer.
69 * @buf_info: gem objects and dma address, size.
70 * @filp: a pointer to drm_file.
72 struct drm_exynos_ipp_mem_node {
73 struct list_head list;
74 enum drm_exynos_ops_id ops_id;
77 struct drm_exynos_ipp_buf_info buf_info;
81 * A structure of ipp context.
83 * @subdrv: prepare initialization using subdrv.
84 * @ipp_lock: lock for synchronization of access to ipp_idr.
85 * @prop_lock: lock for synchronization of access to prop_idr.
86 * @ipp_idr: ipp driver idr.
87 * @prop_idr: property idr.
88 * @event_workq: event work queue.
89 * @cmd_workq: command work queue.
92 struct exynos_drm_subdrv subdrv;
93 struct mutex ipp_lock;
94 struct mutex prop_lock;
97 struct workqueue_struct *event_workq;
98 struct workqueue_struct *cmd_workq;
101 static LIST_HEAD(exynos_drm_ippdrv_list);
102 static DEFINE_MUTEX(exynos_drm_ippdrv_lock);
103 static BLOCKING_NOTIFIER_HEAD(exynos_drm_ippnb_list);
105 int exynos_platform_device_ipp_register(void)
107 struct platform_device *pdev;
109 if (exynos_drm_ipp_pdev)
112 pdev = platform_device_register_simple("exynos-drm-ipp", -1, NULL, 0);
114 return PTR_ERR(pdev);
116 exynos_drm_ipp_pdev = pdev;
121 void exynos_platform_device_ipp_unregister(void)
123 if (exynos_drm_ipp_pdev) {
124 platform_device_unregister(exynos_drm_ipp_pdev);
125 exynos_drm_ipp_pdev = NULL;
129 int exynos_drm_ippdrv_register(struct exynos_drm_ippdrv *ippdrv)
131 mutex_lock(&exynos_drm_ippdrv_lock);
132 list_add_tail(&ippdrv->drv_list, &exynos_drm_ippdrv_list);
133 mutex_unlock(&exynos_drm_ippdrv_lock);
138 int exynos_drm_ippdrv_unregister(struct exynos_drm_ippdrv *ippdrv)
140 mutex_lock(&exynos_drm_ippdrv_lock);
141 list_del(&ippdrv->drv_list);
142 mutex_unlock(&exynos_drm_ippdrv_lock);
147 static int ipp_create_id(struct idr *id_idr, struct mutex *lock, void *obj)
152 ret = idr_alloc(id_idr, obj, 1, 0, GFP_KERNEL);
158 static void ipp_remove_id(struct idr *id_idr, struct mutex *lock, u32 id)
161 idr_remove(id_idr, id);
165 static void *ipp_find_obj(struct idr *id_idr, struct mutex *lock, u32 id)
170 obj = idr_find(id_idr, id);
176 static int ipp_check_driver(struct exynos_drm_ippdrv *ippdrv,
177 struct drm_exynos_ipp_property *property)
179 if (ippdrv->dedicated || (!ipp_is_m2m_cmd(property->cmd) &&
180 !pm_runtime_suspended(ippdrv->dev)))
183 if (ippdrv->check_property &&
184 ippdrv->check_property(ippdrv->dev, property))
190 static struct exynos_drm_ippdrv *ipp_find_driver(struct ipp_context *ctx,
191 struct drm_exynos_ipp_property *property)
193 struct exynos_drm_ippdrv *ippdrv;
194 u32 ipp_id = property->ipp_id;
198 ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock, ipp_id);
200 DRM_DEBUG("ipp%d driver not found\n", ipp_id);
201 return ERR_PTR(-ENODEV);
204 ret = ipp_check_driver(ippdrv, property);
206 DRM_DEBUG("ipp%d driver check error %d\n", ipp_id, ret);
212 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
213 ret = ipp_check_driver(ippdrv, property);
218 DRM_DEBUG("cannot find driver suitable for given property.\n");
221 return ERR_PTR(-ENODEV);
224 static struct exynos_drm_ippdrv *ipp_find_drv_by_handle(u32 prop_id)
226 struct exynos_drm_ippdrv *ippdrv;
227 struct drm_exynos_ipp_cmd_node *c_node;
230 DRM_DEBUG_KMS("prop_id[%d]\n", prop_id);
233 * This case is search ipp driver by prop_id handle.
234 * sometimes, ipp subsystem find driver by prop_id.
235 * e.g PAUSE state, queue buf, command control.
237 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
238 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n", count++, (int)ippdrv);
240 mutex_lock(&ippdrv->cmd_lock);
241 list_for_each_entry(c_node, &ippdrv->cmd_list, list) {
242 if (c_node->property.prop_id == prop_id) {
243 mutex_unlock(&ippdrv->cmd_lock);
247 mutex_unlock(&ippdrv->cmd_lock);
250 return ERR_PTR(-ENODEV);
253 int exynos_drm_ipp_get_property(struct drm_device *drm_dev, void *data,
254 struct drm_file *file)
256 struct drm_exynos_file_private *file_priv = file->driver_priv;
257 struct device *dev = file_priv->ipp_dev;
258 struct ipp_context *ctx = get_ipp_context(dev);
259 struct drm_exynos_ipp_prop_list *prop_list = data;
260 struct exynos_drm_ippdrv *ippdrv;
264 DRM_ERROR("invalid context.\n");
269 DRM_ERROR("invalid property parameter.\n");
273 DRM_DEBUG_KMS("ipp_id[%d]\n", prop_list->ipp_id);
275 if (!prop_list->ipp_id) {
276 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list)
280 * Supports ippdrv list count for user application.
281 * First step user application getting ippdrv count.
282 * and second step getting ippdrv capability using ipp_id.
284 prop_list->count = count;
287 * Getting ippdrv capability by ipp_id.
288 * some device not supported wb, output interface.
289 * so, user application detect correct ipp driver
292 ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock,
295 DRM_ERROR("not found ipp%d driver.\n",
300 *prop_list = ippdrv->prop_list;
306 static void ipp_print_property(struct drm_exynos_ipp_property *property,
309 struct drm_exynos_ipp_config *config = &property->config[idx];
310 struct drm_exynos_pos *pos = &config->pos;
311 struct drm_exynos_sz *sz = &config->sz;
313 DRM_DEBUG_KMS("prop_id[%d]ops[%s]fmt[0x%x]\n",
314 property->prop_id, idx ? "dst" : "src", config->fmt);
316 DRM_DEBUG_KMS("pos[%d %d %d %d]sz[%d %d]f[%d]r[%d]\n",
317 pos->x, pos->y, pos->w, pos->h,
318 sz->hsize, sz->vsize, config->flip, config->degree);
321 static struct drm_exynos_ipp_cmd_work *ipp_create_cmd_work(void)
323 struct drm_exynos_ipp_cmd_work *cmd_work;
325 cmd_work = kzalloc(sizeof(*cmd_work), GFP_KERNEL);
327 return ERR_PTR(-ENOMEM);
329 INIT_WORK((struct work_struct *)cmd_work, ipp_sched_cmd);
334 static struct drm_exynos_ipp_event_work *ipp_create_event_work(void)
336 struct drm_exynos_ipp_event_work *event_work;
338 event_work = kzalloc(sizeof(*event_work), GFP_KERNEL);
340 return ERR_PTR(-ENOMEM);
342 INIT_WORK(&event_work->work, ipp_sched_event);
347 int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
348 struct drm_file *file)
350 struct drm_exynos_file_private *file_priv = file->driver_priv;
351 struct device *dev = file_priv->ipp_dev;
352 struct ipp_context *ctx = get_ipp_context(dev);
353 struct drm_exynos_ipp_property *property = data;
354 struct exynos_drm_ippdrv *ippdrv;
355 struct drm_exynos_ipp_cmd_node *c_node;
360 DRM_ERROR("invalid context.\n");
365 DRM_ERROR("invalid property parameter.\n");
369 prop_id = property->prop_id;
372 * This is log print for user application property.
373 * user application set various property.
376 ipp_print_property(property, i);
379 * In case prop_id is not zero try to set existing property.
382 c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock, prop_id);
384 if (!c_node || c_node->filp != file) {
385 DRM_DEBUG_KMS("prop_id[%d] not found\n", prop_id);
389 if (c_node->state != IPP_STATE_STOP) {
390 DRM_DEBUG_KMS("prop_id[%d] not stopped\n", prop_id);
394 c_node->property = *property;
399 /* find ipp driver using ipp id */
400 ippdrv = ipp_find_driver(ctx, property);
401 if (IS_ERR(ippdrv)) {
402 DRM_ERROR("failed to get ipp driver.\n");
406 /* allocate command node */
407 c_node = kzalloc(sizeof(*c_node), GFP_KERNEL);
411 ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node);
413 DRM_ERROR("failed to create id.\n");
416 property->prop_id = ret;
418 DRM_DEBUG_KMS("created prop_id[%d]cmd[%d]ippdrv[0x%x]\n",
419 property->prop_id, property->cmd, (int)ippdrv);
421 /* stored property information and ippdrv in private data */
422 c_node->property = *property;
423 c_node->state = IPP_STATE_IDLE;
426 c_node->start_work = ipp_create_cmd_work();
427 if (IS_ERR(c_node->start_work)) {
428 DRM_ERROR("failed to create start work.\n");
432 c_node->stop_work = ipp_create_cmd_work();
433 if (IS_ERR(c_node->stop_work)) {
434 DRM_ERROR("failed to create stop work.\n");
438 c_node->event_work = ipp_create_event_work();
439 if (IS_ERR(c_node->event_work)) {
440 DRM_ERROR("failed to create event work.\n");
444 mutex_init(&c_node->lock);
445 mutex_init(&c_node->mem_lock);
446 mutex_init(&c_node->event_lock);
448 init_completion(&c_node->start_complete);
449 init_completion(&c_node->stop_complete);
452 INIT_LIST_HEAD(&c_node->mem_list[i]);
454 INIT_LIST_HEAD(&c_node->event_list);
455 mutex_lock(&ippdrv->cmd_lock);
456 list_add_tail(&c_node->list, &ippdrv->cmd_list);
457 mutex_unlock(&ippdrv->cmd_lock);
459 /* make dedicated state without m2m */
460 if (!ipp_is_m2m_cmd(property->cmd))
461 ippdrv->dedicated = true;
466 kfree(c_node->stop_work);
468 kfree(c_node->start_work);
470 ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock, property->prop_id);
476 static int ipp_put_mem_node(struct drm_device *drm_dev,
477 struct drm_exynos_ipp_cmd_node *c_node,
478 struct drm_exynos_ipp_mem_node *m_node)
482 DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
485 DRM_ERROR("invalid dequeue node.\n");
489 DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
492 for_each_ipp_planar(i) {
493 unsigned long handle = m_node->buf_info.handles[i];
495 exynos_drm_gem_put_dma_addr(drm_dev, handle,
499 list_del(&m_node->list);
505 static struct drm_exynos_ipp_mem_node
506 *ipp_get_mem_node(struct drm_device *drm_dev,
507 struct drm_exynos_ipp_cmd_node *c_node,
508 struct drm_exynos_ipp_queue_buf *qbuf)
510 struct drm_exynos_ipp_mem_node *m_node;
511 struct drm_exynos_ipp_buf_info *buf_info;
514 m_node = kzalloc(sizeof(*m_node), GFP_KERNEL);
516 return ERR_PTR(-ENOMEM);
518 buf_info = &m_node->buf_info;
520 /* operations, buffer id */
521 m_node->ops_id = qbuf->ops_id;
522 m_node->prop_id = qbuf->prop_id;
523 m_node->buf_id = qbuf->buf_id;
524 INIT_LIST_HEAD(&m_node->list);
526 DRM_DEBUG_KMS("m_node[0x%x]ops_id[%d]\n", (int)m_node, qbuf->ops_id);
527 DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]\n", qbuf->prop_id, m_node->buf_id);
529 for_each_ipp_planar(i) {
530 DRM_DEBUG_KMS("i[%d]handle[0x%x]\n", i, qbuf->handle[i]);
532 /* get dma address by handle */
533 if (qbuf->handle[i]) {
536 addr = exynos_drm_gem_get_dma_addr(drm_dev,
537 qbuf->handle[i], c_node->filp);
539 DRM_ERROR("failed to get addr.\n");
540 ipp_put_mem_node(drm_dev, c_node, m_node);
541 return ERR_PTR(-EFAULT);
544 buf_info->handles[i] = qbuf->handle[i];
545 buf_info->base[i] = *addr;
546 DRM_DEBUG_KMS("i[%d]base[0x%x]hd[0x%lx]\n", i,
547 buf_info->base[i], buf_info->handles[i]);
551 mutex_lock(&c_node->mem_lock);
552 list_add_tail(&m_node->list, &c_node->mem_list[qbuf->ops_id]);
553 mutex_unlock(&c_node->mem_lock);
558 static void ipp_clean_mem_nodes(struct drm_device *drm_dev,
559 struct drm_exynos_ipp_cmd_node *c_node, int ops)
561 struct drm_exynos_ipp_mem_node *m_node, *tm_node;
562 struct list_head *head = &c_node->mem_list[ops];
564 mutex_lock(&c_node->mem_lock);
566 list_for_each_entry_safe(m_node, tm_node, head, list) {
569 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
571 DRM_ERROR("failed to put m_node.\n");
574 mutex_unlock(&c_node->mem_lock);
577 static void ipp_free_event(struct drm_pending_event *event)
582 static int ipp_get_event(struct drm_device *drm_dev,
583 struct drm_exynos_ipp_cmd_node *c_node,
584 struct drm_exynos_ipp_queue_buf *qbuf)
586 struct drm_exynos_ipp_send_event *e;
589 DRM_DEBUG_KMS("ops_id[%d]buf_id[%d]\n", qbuf->ops_id, qbuf->buf_id);
591 e = kzalloc(sizeof(*e), GFP_KERNEL);
593 spin_lock_irqsave(&drm_dev->event_lock, flags);
594 c_node->filp->event_space += sizeof(e->event);
595 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
600 e->event.base.type = DRM_EXYNOS_IPP_EVENT;
601 e->event.base.length = sizeof(e->event);
602 e->event.user_data = qbuf->user_data;
603 e->event.prop_id = qbuf->prop_id;
604 e->event.buf_id[EXYNOS_DRM_OPS_DST] = qbuf->buf_id;
605 e->base.event = &e->event.base;
606 e->base.file_priv = c_node->filp;
607 e->base.destroy = ipp_free_event;
608 mutex_lock(&c_node->event_lock);
609 list_add_tail(&e->base.link, &c_node->event_list);
610 mutex_unlock(&c_node->event_lock);
615 static void ipp_put_event(struct drm_exynos_ipp_cmd_node *c_node,
616 struct drm_exynos_ipp_queue_buf *qbuf)
618 struct drm_exynos_ipp_send_event *e, *te;
621 mutex_lock(&c_node->event_lock);
622 list_for_each_entry_safe(e, te, &c_node->event_list, base.link) {
623 DRM_DEBUG_KMS("count[%d]e[0x%x]\n", count++, (int)e);
626 * qbuf == NULL condition means all event deletion.
627 * stop operations want to delete all event list.
628 * another case delete only same buf id.
632 list_del(&e->base.link);
636 /* compare buffer id */
637 if (qbuf && (qbuf->buf_id ==
638 e->event.buf_id[EXYNOS_DRM_OPS_DST])) {
640 list_del(&e->base.link);
647 mutex_unlock(&c_node->event_lock);
651 static void ipp_clean_cmd_node(struct ipp_context *ctx,
652 struct drm_exynos_ipp_cmd_node *c_node)
657 cancel_work_sync(&c_node->start_work->work);
658 cancel_work_sync(&c_node->stop_work->work);
659 cancel_work_sync(&c_node->event_work->work);
662 ipp_put_event(c_node, NULL);
665 ipp_clean_mem_nodes(ctx->subdrv.drm_dev, c_node, i);
668 list_del(&c_node->list);
670 ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock,
671 c_node->property.prop_id);
674 mutex_destroy(&c_node->lock);
675 mutex_destroy(&c_node->mem_lock);
676 mutex_destroy(&c_node->event_lock);
678 /* free command node */
679 kfree(c_node->start_work);
680 kfree(c_node->stop_work);
681 kfree(c_node->event_work);
685 static bool ipp_check_mem_list(struct drm_exynos_ipp_cmd_node *c_node)
687 switch (c_node->property.cmd) {
689 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
691 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]);
694 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]) &&
695 !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
699 static struct drm_exynos_ipp_mem_node
700 *ipp_find_mem_node(struct drm_exynos_ipp_cmd_node *c_node,
701 struct drm_exynos_ipp_queue_buf *qbuf)
703 struct drm_exynos_ipp_mem_node *m_node;
704 struct list_head *head;
707 DRM_DEBUG_KMS("buf_id[%d]\n", qbuf->buf_id);
709 /* source/destination memory list */
710 head = &c_node->mem_list[qbuf->ops_id];
712 /* find memory node from memory list */
713 list_for_each_entry(m_node, head, list) {
714 DRM_DEBUG_KMS("count[%d]m_node[0x%x]\n", count++, (int)m_node);
716 /* compare buffer id */
717 if (m_node->buf_id == qbuf->buf_id)
724 static int ipp_set_mem_node(struct exynos_drm_ippdrv *ippdrv,
725 struct drm_exynos_ipp_cmd_node *c_node,
726 struct drm_exynos_ipp_mem_node *m_node)
728 struct exynos_drm_ipp_ops *ops = NULL;
731 DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
734 DRM_ERROR("invalid queue node.\n");
738 DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
740 /* get operations callback */
741 ops = ippdrv->ops[m_node->ops_id];
743 DRM_ERROR("not support ops.\n");
747 /* set address and enable irq */
749 ret = ops->set_addr(ippdrv->dev, &m_node->buf_info,
750 m_node->buf_id, IPP_BUF_ENQUEUE);
752 DRM_ERROR("failed to set addr.\n");
760 static void ipp_handle_cmd_work(struct device *dev,
761 struct exynos_drm_ippdrv *ippdrv,
762 struct drm_exynos_ipp_cmd_work *cmd_work,
763 struct drm_exynos_ipp_cmd_node *c_node)
765 struct ipp_context *ctx = get_ipp_context(dev);
767 cmd_work->ippdrv = ippdrv;
768 cmd_work->c_node = c_node;
769 queue_work(ctx->cmd_workq, &cmd_work->work);
772 static int ipp_queue_buf_with_run(struct device *dev,
773 struct drm_exynos_ipp_cmd_node *c_node,
774 struct drm_exynos_ipp_mem_node *m_node,
775 struct drm_exynos_ipp_queue_buf *qbuf)
777 struct exynos_drm_ippdrv *ippdrv;
778 struct drm_exynos_ipp_property *property;
779 struct exynos_drm_ipp_ops *ops;
782 ippdrv = ipp_find_drv_by_handle(qbuf->prop_id);
783 if (IS_ERR(ippdrv)) {
784 DRM_ERROR("failed to get ipp driver.\n");
788 ops = ippdrv->ops[qbuf->ops_id];
790 DRM_ERROR("failed to get ops.\n");
794 property = &c_node->property;
796 if (c_node->state != IPP_STATE_START) {
797 DRM_DEBUG_KMS("bypass for invalid state.\n");
801 mutex_lock(&c_node->mem_lock);
802 if (!ipp_check_mem_list(c_node)) {
803 mutex_unlock(&c_node->mem_lock);
804 DRM_DEBUG_KMS("empty memory.\n");
809 * If set destination buffer and enabled clock,
810 * then m2m operations need start operations at queue_buf
812 if (ipp_is_m2m_cmd(property->cmd)) {
813 struct drm_exynos_ipp_cmd_work *cmd_work = c_node->start_work;
815 cmd_work->ctrl = IPP_CTRL_PLAY;
816 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
818 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
820 mutex_unlock(&c_node->mem_lock);
821 DRM_ERROR("failed to set m node.\n");
825 mutex_unlock(&c_node->mem_lock);
830 static void ipp_clean_queue_buf(struct drm_device *drm_dev,
831 struct drm_exynos_ipp_cmd_node *c_node,
832 struct drm_exynos_ipp_queue_buf *qbuf)
834 struct drm_exynos_ipp_mem_node *m_node, *tm_node;
837 mutex_lock(&c_node->mem_lock);
838 list_for_each_entry_safe(m_node, tm_node,
839 &c_node->mem_list[qbuf->ops_id], list) {
840 if (m_node->buf_id == qbuf->buf_id &&
841 m_node->ops_id == qbuf->ops_id)
842 ipp_put_mem_node(drm_dev, c_node, m_node);
844 mutex_unlock(&c_node->mem_lock);
847 int exynos_drm_ipp_queue_buf(struct drm_device *drm_dev, void *data,
848 struct drm_file *file)
850 struct drm_exynos_file_private *file_priv = file->driver_priv;
851 struct device *dev = file_priv->ipp_dev;
852 struct ipp_context *ctx = get_ipp_context(dev);
853 struct drm_exynos_ipp_queue_buf *qbuf = data;
854 struct drm_exynos_ipp_cmd_node *c_node;
855 struct drm_exynos_ipp_mem_node *m_node;
859 DRM_ERROR("invalid buf parameter.\n");
863 if (qbuf->ops_id >= EXYNOS_DRM_OPS_MAX) {
864 DRM_ERROR("invalid ops parameter.\n");
868 DRM_DEBUG_KMS("prop_id[%d]ops_id[%s]buf_id[%d]buf_type[%d]\n",
869 qbuf->prop_id, qbuf->ops_id ? "dst" : "src",
870 qbuf->buf_id, qbuf->buf_type);
872 /* find command node */
873 c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
875 if (!c_node || c_node->filp != file) {
876 DRM_ERROR("failed to get command node.\n");
881 switch (qbuf->buf_type) {
882 case IPP_BUF_ENQUEUE:
883 /* get memory node */
884 m_node = ipp_get_mem_node(drm_dev, c_node, qbuf);
885 if (IS_ERR(m_node)) {
886 DRM_ERROR("failed to get m_node.\n");
887 return PTR_ERR(m_node);
891 * first step get event for destination buffer.
892 * and second step when M2M case run with destination buffer
895 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST) {
896 /* get event for destination buffer */
897 ret = ipp_get_event(drm_dev, c_node, qbuf);
899 DRM_ERROR("failed to get event.\n");
904 * M2M case run play control for streaming feature.
905 * other case set address and waiting.
907 ret = ipp_queue_buf_with_run(dev, c_node, m_node, qbuf);
909 DRM_ERROR("failed to run command.\n");
914 case IPP_BUF_DEQUEUE:
915 mutex_lock(&c_node->lock);
917 /* put event for destination buffer */
918 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST)
919 ipp_put_event(c_node, qbuf);
921 ipp_clean_queue_buf(drm_dev, c_node, qbuf);
923 mutex_unlock(&c_node->lock);
926 DRM_ERROR("invalid buffer control.\n");
933 DRM_ERROR("clean memory nodes.\n");
935 ipp_clean_queue_buf(drm_dev, c_node, qbuf);
939 static bool exynos_drm_ipp_check_valid(struct device *dev,
940 enum drm_exynos_ipp_ctrl ctrl, enum drm_exynos_ipp_state state)
942 if (ctrl != IPP_CTRL_PLAY) {
943 if (pm_runtime_suspended(dev)) {
944 DRM_ERROR("pm:runtime_suspended.\n");
951 if (state != IPP_STATE_IDLE)
955 if (state == IPP_STATE_STOP)
959 if (state != IPP_STATE_START)
962 case IPP_CTRL_RESUME:
963 if (state != IPP_STATE_STOP)
967 DRM_ERROR("invalid state.\n");
974 DRM_ERROR("invalid status:ctrl[%d]state[%d]\n", ctrl, state);
978 int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
979 struct drm_file *file)
981 struct drm_exynos_file_private *file_priv = file->driver_priv;
982 struct exynos_drm_ippdrv *ippdrv = NULL;
983 struct device *dev = file_priv->ipp_dev;
984 struct ipp_context *ctx = get_ipp_context(dev);
985 struct drm_exynos_ipp_cmd_ctrl *cmd_ctrl = data;
986 struct drm_exynos_ipp_cmd_work *cmd_work;
987 struct drm_exynos_ipp_cmd_node *c_node;
990 DRM_ERROR("invalid context.\n");
995 DRM_ERROR("invalid control parameter.\n");
999 DRM_DEBUG_KMS("ctrl[%d]prop_id[%d]\n",
1000 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1002 ippdrv = ipp_find_drv_by_handle(cmd_ctrl->prop_id);
1003 if (IS_ERR(ippdrv)) {
1004 DRM_ERROR("failed to get ipp driver.\n");
1005 return PTR_ERR(ippdrv);
1008 c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
1010 if (!c_node || c_node->filp != file) {
1011 DRM_ERROR("invalid command node list.\n");
1015 if (!exynos_drm_ipp_check_valid(ippdrv->dev, cmd_ctrl->ctrl,
1017 DRM_ERROR("invalid state.\n");
1021 switch (cmd_ctrl->ctrl) {
1023 if (pm_runtime_suspended(ippdrv->dev))
1024 pm_runtime_get_sync(ippdrv->dev);
1026 c_node->state = IPP_STATE_START;
1028 cmd_work = c_node->start_work;
1029 cmd_work->ctrl = cmd_ctrl->ctrl;
1030 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1033 cmd_work = c_node->stop_work;
1034 cmd_work->ctrl = cmd_ctrl->ctrl;
1035 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1037 if (!wait_for_completion_timeout(&c_node->stop_complete,
1038 msecs_to_jiffies(300))) {
1039 DRM_ERROR("timeout stop:prop_id[%d]\n",
1040 c_node->property.prop_id);
1043 c_node->state = IPP_STATE_STOP;
1044 ippdrv->dedicated = false;
1045 mutex_lock(&ippdrv->cmd_lock);
1046 ipp_clean_cmd_node(ctx, c_node);
1048 if (list_empty(&ippdrv->cmd_list))
1049 pm_runtime_put_sync(ippdrv->dev);
1050 mutex_unlock(&ippdrv->cmd_lock);
1052 case IPP_CTRL_PAUSE:
1053 cmd_work = c_node->stop_work;
1054 cmd_work->ctrl = cmd_ctrl->ctrl;
1055 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1057 if (!wait_for_completion_timeout(&c_node->stop_complete,
1058 msecs_to_jiffies(200))) {
1059 DRM_ERROR("timeout stop:prop_id[%d]\n",
1060 c_node->property.prop_id);
1063 c_node->state = IPP_STATE_STOP;
1065 case IPP_CTRL_RESUME:
1066 c_node->state = IPP_STATE_START;
1067 cmd_work = c_node->start_work;
1068 cmd_work->ctrl = cmd_ctrl->ctrl;
1069 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1072 DRM_ERROR("could not support this state currently.\n");
1076 DRM_DEBUG_KMS("done ctrl[%d]prop_id[%d]\n",
1077 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1082 int exynos_drm_ippnb_register(struct notifier_block *nb)
1084 return blocking_notifier_chain_register(
1085 &exynos_drm_ippnb_list, nb);
1088 int exynos_drm_ippnb_unregister(struct notifier_block *nb)
1090 return blocking_notifier_chain_unregister(
1091 &exynos_drm_ippnb_list, nb);
1094 int exynos_drm_ippnb_send_event(unsigned long val, void *v)
1096 return blocking_notifier_call_chain(
1097 &exynos_drm_ippnb_list, val, v);
1100 static int ipp_set_property(struct exynos_drm_ippdrv *ippdrv,
1101 struct drm_exynos_ipp_property *property)
1103 struct exynos_drm_ipp_ops *ops = NULL;
1108 DRM_ERROR("invalid property parameter.\n");
1112 DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1114 /* reset h/w block */
1115 if (ippdrv->reset &&
1116 ippdrv->reset(ippdrv->dev)) {
1120 /* set source,destination operations */
1121 for_each_ipp_ops(i) {
1122 struct drm_exynos_ipp_config *config =
1123 &property->config[i];
1125 ops = ippdrv->ops[i];
1126 if (!ops || !config) {
1127 DRM_ERROR("not support ops and config.\n");
1133 ret = ops->set_fmt(ippdrv->dev, config->fmt);
1138 /* set transform for rotation, flip */
1139 if (ops->set_transf) {
1140 ret = ops->set_transf(ippdrv->dev, config->degree,
1141 config->flip, &swap);
1147 if (ops->set_size) {
1148 ret = ops->set_size(ippdrv->dev, swap, &config->pos,
1158 static int ipp_start_property(struct exynos_drm_ippdrv *ippdrv,
1159 struct drm_exynos_ipp_cmd_node *c_node)
1161 struct drm_exynos_ipp_mem_node *m_node;
1162 struct drm_exynos_ipp_property *property = &c_node->property;
1163 struct list_head *head;
1166 DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1168 /* store command info in ippdrv */
1169 ippdrv->c_node = c_node;
1171 mutex_lock(&c_node->mem_lock);
1172 if (!ipp_check_mem_list(c_node)) {
1173 DRM_DEBUG_KMS("empty memory.\n");
1178 /* set current property in ippdrv */
1179 ret = ipp_set_property(ippdrv, property);
1181 DRM_ERROR("failed to set property.\n");
1182 ippdrv->c_node = NULL;
1187 switch (property->cmd) {
1189 for_each_ipp_ops(i) {
1190 /* source/destination memory list */
1191 head = &c_node->mem_list[i];
1193 m_node = list_first_entry(head,
1194 struct drm_exynos_ipp_mem_node, list);
1196 DRM_DEBUG_KMS("m_node[0x%x]\n", (int)m_node);
1198 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1200 DRM_ERROR("failed to set m node.\n");
1206 /* destination memory list */
1207 head = &c_node->mem_list[EXYNOS_DRM_OPS_DST];
1209 list_for_each_entry(m_node, head, list) {
1210 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1212 DRM_ERROR("failed to set m node.\n");
1217 case IPP_CMD_OUTPUT:
1218 /* source memory list */
1219 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1221 list_for_each_entry(m_node, head, list) {
1222 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1224 DRM_ERROR("failed to set m node.\n");
1230 DRM_ERROR("invalid operations.\n");
1234 mutex_unlock(&c_node->mem_lock);
1236 DRM_DEBUG_KMS("cmd[%d]\n", property->cmd);
1238 /* start operations */
1239 if (ippdrv->start) {
1240 ret = ippdrv->start(ippdrv->dev, property->cmd);
1242 DRM_ERROR("failed to start ops.\n");
1243 ippdrv->c_node = NULL;
1251 mutex_unlock(&c_node->mem_lock);
1252 ippdrv->c_node = NULL;
1256 static int ipp_stop_property(struct drm_device *drm_dev,
1257 struct exynos_drm_ippdrv *ippdrv,
1258 struct drm_exynos_ipp_cmd_node *c_node)
1260 struct drm_exynos_ipp_property *property = &c_node->property;
1263 DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1265 /* stop operations */
1267 ippdrv->stop(ippdrv->dev, property->cmd);
1270 switch (property->cmd) {
1273 ipp_clean_mem_nodes(drm_dev, c_node, i);
1276 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_DST);
1278 case IPP_CMD_OUTPUT:
1279 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_SRC);
1282 DRM_ERROR("invalid operations.\n");
1289 void ipp_sched_cmd(struct work_struct *work)
1291 struct drm_exynos_ipp_cmd_work *cmd_work =
1292 container_of(work, struct drm_exynos_ipp_cmd_work, work);
1293 struct exynos_drm_ippdrv *ippdrv;
1294 struct drm_exynos_ipp_cmd_node *c_node;
1295 struct drm_exynos_ipp_property *property;
1298 ippdrv = cmd_work->ippdrv;
1300 DRM_ERROR("invalid ippdrv list.\n");
1304 c_node = cmd_work->c_node;
1306 DRM_ERROR("invalid command node list.\n");
1310 mutex_lock(&c_node->lock);
1312 property = &c_node->property;
1314 switch (cmd_work->ctrl) {
1316 case IPP_CTRL_RESUME:
1317 ret = ipp_start_property(ippdrv, c_node);
1319 DRM_ERROR("failed to start property:prop_id[%d]\n",
1320 c_node->property.prop_id);
1325 * M2M case supports wait_completion of transfer.
1326 * because M2M case supports single unit operation
1327 * with multiple queue.
1328 * M2M need to wait completion of data transfer.
1330 if (ipp_is_m2m_cmd(property->cmd)) {
1331 if (!wait_for_completion_timeout
1332 (&c_node->start_complete, msecs_to_jiffies(200))) {
1333 DRM_ERROR("timeout event:prop_id[%d]\n",
1334 c_node->property.prop_id);
1340 case IPP_CTRL_PAUSE:
1341 ret = ipp_stop_property(ippdrv->drm_dev, ippdrv,
1344 DRM_ERROR("failed to stop property.\n");
1348 complete(&c_node->stop_complete);
1351 DRM_ERROR("unknown control type\n");
1355 DRM_DEBUG_KMS("ctrl[%d] done.\n", cmd_work->ctrl);
1358 mutex_unlock(&c_node->lock);
1361 static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
1362 struct drm_exynos_ipp_cmd_node *c_node, int *buf_id)
1364 struct drm_device *drm_dev = ippdrv->drm_dev;
1365 struct drm_exynos_ipp_property *property = &c_node->property;
1366 struct drm_exynos_ipp_mem_node *m_node;
1367 struct drm_exynos_ipp_queue_buf qbuf;
1368 struct drm_exynos_ipp_send_event *e;
1369 struct list_head *head;
1371 unsigned long flags;
1372 u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, };
1376 DRM_DEBUG_KMS("%s buf_id[%d]\n", i ? "dst" : "src", buf_id[i]);
1379 DRM_ERROR("failed to get drm_dev.\n");
1384 DRM_ERROR("failed to get property.\n");
1388 mutex_lock(&c_node->event_lock);
1389 if (list_empty(&c_node->event_list)) {
1390 DRM_DEBUG_KMS("event list is empty.\n");
1392 goto err_event_unlock;
1395 mutex_lock(&c_node->mem_lock);
1396 if (!ipp_check_mem_list(c_node)) {
1397 DRM_DEBUG_KMS("empty memory.\n");
1399 goto err_mem_unlock;
1403 switch (property->cmd) {
1405 for_each_ipp_ops(i) {
1406 /* source/destination memory list */
1407 head = &c_node->mem_list[i];
1409 m_node = list_first_entry(head,
1410 struct drm_exynos_ipp_mem_node, list);
1412 tbuf_id[i] = m_node->buf_id;
1413 DRM_DEBUG_KMS("%s buf_id[%d]\n",
1414 i ? "dst" : "src", tbuf_id[i]);
1416 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1418 DRM_ERROR("failed to put m_node.\n");
1422 /* clear buf for finding */
1423 memset(&qbuf, 0x0, sizeof(qbuf));
1424 qbuf.ops_id = EXYNOS_DRM_OPS_DST;
1425 qbuf.buf_id = buf_id[EXYNOS_DRM_OPS_DST];
1427 /* get memory node entry */
1428 m_node = ipp_find_mem_node(c_node, &qbuf);
1430 DRM_ERROR("empty memory node.\n");
1432 goto err_mem_unlock;
1435 tbuf_id[EXYNOS_DRM_OPS_DST] = m_node->buf_id;
1437 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1439 DRM_ERROR("failed to put m_node.\n");
1441 case IPP_CMD_OUTPUT:
1442 /* source memory list */
1443 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1445 m_node = list_first_entry(head,
1446 struct drm_exynos_ipp_mem_node, list);
1448 tbuf_id[EXYNOS_DRM_OPS_SRC] = m_node->buf_id;
1450 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1452 DRM_ERROR("failed to put m_node.\n");
1455 DRM_ERROR("invalid operations.\n");
1457 goto err_mem_unlock;
1459 mutex_unlock(&c_node->mem_lock);
1461 if (tbuf_id[EXYNOS_DRM_OPS_DST] != buf_id[EXYNOS_DRM_OPS_DST])
1462 DRM_ERROR("failed to match buf_id[%d %d]prop_id[%d]\n",
1463 tbuf_id[1], buf_id[1], property->prop_id);
1466 * command node have event list of destination buffer
1467 * If destination buffer enqueue to mem list,
1468 * then we make event and link to event list tail.
1469 * so, we get first event for first enqueued buffer.
1471 e = list_first_entry(&c_node->event_list,
1472 struct drm_exynos_ipp_send_event, base.link);
1474 do_gettimeofday(&now);
1475 DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec);
1476 e->event.tv_sec = now.tv_sec;
1477 e->event.tv_usec = now.tv_usec;
1478 e->event.prop_id = property->prop_id;
1480 /* set buffer id about source destination */
1482 e->event.buf_id[i] = tbuf_id[i];
1484 spin_lock_irqsave(&drm_dev->event_lock, flags);
1485 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
1486 wake_up_interruptible(&e->base.file_priv->event_wait);
1487 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1488 mutex_unlock(&c_node->event_lock);
1490 DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
1491 property->cmd, property->prop_id, tbuf_id[EXYNOS_DRM_OPS_DST]);
1496 mutex_unlock(&c_node->mem_lock);
1498 mutex_unlock(&c_node->event_lock);
1502 void ipp_sched_event(struct work_struct *work)
1504 struct drm_exynos_ipp_event_work *event_work =
1505 container_of(work, struct drm_exynos_ipp_event_work, work);
1506 struct exynos_drm_ippdrv *ippdrv;
1507 struct drm_exynos_ipp_cmd_node *c_node;
1511 DRM_ERROR("failed to get event_work.\n");
1515 DRM_DEBUG_KMS("buf_id[%d]\n", event_work->buf_id[EXYNOS_DRM_OPS_DST]);
1517 ippdrv = event_work->ippdrv;
1519 DRM_ERROR("failed to get ipp driver.\n");
1523 c_node = ippdrv->c_node;
1525 DRM_ERROR("failed to get command node.\n");
1530 * IPP supports command thread, event thread synchronization.
1531 * If IPP close immediately from user land, then IPP make
1532 * synchronization with command thread, so make complete event.
1533 * or going out operations.
1535 if (c_node->state != IPP_STATE_START) {
1536 DRM_DEBUG_KMS("bypass state[%d]prop_id[%d]\n",
1537 c_node->state, c_node->property.prop_id);
1538 goto err_completion;
1541 ret = ipp_send_event(ippdrv, c_node, event_work->buf_id);
1543 DRM_ERROR("failed to send event.\n");
1544 goto err_completion;
1548 if (ipp_is_m2m_cmd(c_node->property.cmd))
1549 complete(&c_node->start_complete);
1552 static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1554 struct ipp_context *ctx = get_ipp_context(dev);
1555 struct exynos_drm_ippdrv *ippdrv;
1558 /* get ipp driver entry */
1559 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1560 ippdrv->drm_dev = drm_dev;
1562 ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv);
1564 DRM_ERROR("failed to create id.\n");
1567 ippdrv->prop_list.ipp_id = ret;
1569 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]ipp_id[%d]\n",
1570 count++, (int)ippdrv, ret);
1572 /* store parent device for node */
1573 ippdrv->parent_dev = dev;
1575 /* store event work queue and handler */
1576 ippdrv->event_workq = ctx->event_workq;
1577 ippdrv->sched_event = ipp_sched_event;
1578 INIT_LIST_HEAD(&ippdrv->cmd_list);
1579 mutex_init(&ippdrv->cmd_lock);
1581 if (is_drm_iommu_supported(drm_dev)) {
1582 ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
1584 DRM_ERROR("failed to activate iommu\n");
1593 /* get ipp driver entry */
1594 list_for_each_entry_continue_reverse(ippdrv, &exynos_drm_ippdrv_list,
1596 if (is_drm_iommu_supported(drm_dev))
1597 drm_iommu_detach_device(drm_dev, ippdrv->dev);
1599 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1600 ippdrv->prop_list.ipp_id);
1606 static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1608 struct exynos_drm_ippdrv *ippdrv, *t;
1609 struct ipp_context *ctx = get_ipp_context(dev);
1611 /* get ipp driver entry */
1612 list_for_each_entry_safe(ippdrv, t, &exynos_drm_ippdrv_list, drv_list) {
1613 if (is_drm_iommu_supported(drm_dev))
1614 drm_iommu_detach_device(drm_dev, ippdrv->dev);
1616 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1617 ippdrv->prop_list.ipp_id);
1619 ippdrv->drm_dev = NULL;
1620 exynos_drm_ippdrv_unregister(ippdrv);
1624 static int ipp_subdrv_open(struct drm_device *drm_dev, struct device *dev,
1625 struct drm_file *file)
1627 struct drm_exynos_file_private *file_priv = file->driver_priv;
1629 file_priv->ipp_dev = dev;
1631 DRM_DEBUG_KMS("done priv[0x%x]\n", (int)dev);
1636 static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
1637 struct drm_file *file)
1639 struct exynos_drm_ippdrv *ippdrv = NULL;
1640 struct ipp_context *ctx = get_ipp_context(dev);
1641 struct drm_exynos_ipp_cmd_node *c_node, *tc_node;
1644 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1645 mutex_lock(&ippdrv->cmd_lock);
1646 list_for_each_entry_safe(c_node, tc_node,
1647 &ippdrv->cmd_list, list) {
1648 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n",
1649 count++, (int)ippdrv);
1651 if (c_node->filp == file) {
1653 * userland goto unnormal state. process killed.
1654 * and close the file.
1655 * so, IPP didn't called stop cmd ctrl.
1656 * so, we are make stop operation in this state.
1658 if (c_node->state == IPP_STATE_START) {
1659 ipp_stop_property(drm_dev, ippdrv,
1661 c_node->state = IPP_STATE_STOP;
1664 ippdrv->dedicated = false;
1665 ipp_clean_cmd_node(ctx, c_node);
1666 if (list_empty(&ippdrv->cmd_list))
1667 pm_runtime_put_sync(ippdrv->dev);
1670 mutex_unlock(&ippdrv->cmd_lock);
1676 static int ipp_probe(struct platform_device *pdev)
1678 struct device *dev = &pdev->dev;
1679 struct ipp_context *ctx;
1680 struct exynos_drm_subdrv *subdrv;
1683 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1687 mutex_init(&ctx->ipp_lock);
1688 mutex_init(&ctx->prop_lock);
1690 idr_init(&ctx->ipp_idr);
1691 idr_init(&ctx->prop_idr);
1694 * create single thread for ipp event
1695 * IPP supports event thread for IPP drivers.
1696 * IPP driver send event_work to this thread.
1697 * and IPP event thread send event to user process.
1699 ctx->event_workq = create_singlethread_workqueue("ipp_event");
1700 if (!ctx->event_workq) {
1701 dev_err(dev, "failed to create event workqueue\n");
1706 * create single thread for ipp command
1707 * IPP supports command thread for user process.
1708 * user process make command node using set property ioctl.
1709 * and make start_work and send this work to command thread.
1710 * and then this command thread start property.
1712 ctx->cmd_workq = create_singlethread_workqueue("ipp_cmd");
1713 if (!ctx->cmd_workq) {
1714 dev_err(dev, "failed to create cmd workqueue\n");
1716 goto err_event_workq;
1719 /* set sub driver informations */
1720 subdrv = &ctx->subdrv;
1722 subdrv->probe = ipp_subdrv_probe;
1723 subdrv->remove = ipp_subdrv_remove;
1724 subdrv->open = ipp_subdrv_open;
1725 subdrv->close = ipp_subdrv_close;
1727 platform_set_drvdata(pdev, ctx);
1729 ret = exynos_drm_subdrv_register(subdrv);
1731 DRM_ERROR("failed to register drm ipp device.\n");
1735 dev_info(dev, "drm ipp registered successfully.\n");
1740 destroy_workqueue(ctx->cmd_workq);
1742 destroy_workqueue(ctx->event_workq);
1746 static int ipp_remove(struct platform_device *pdev)
1748 struct ipp_context *ctx = platform_get_drvdata(pdev);
1750 /* unregister sub driver */
1751 exynos_drm_subdrv_unregister(&ctx->subdrv);
1753 /* remove,destroy ipp idr */
1754 idr_destroy(&ctx->ipp_idr);
1755 idr_destroy(&ctx->prop_idr);
1757 mutex_destroy(&ctx->ipp_lock);
1758 mutex_destroy(&ctx->prop_lock);
1760 /* destroy command, event work queue */
1761 destroy_workqueue(ctx->cmd_workq);
1762 destroy_workqueue(ctx->event_workq);
1767 struct platform_driver ipp_driver = {
1769 .remove = ipp_remove,
1771 .name = "exynos-drm-ipp",
1772 .owner = THIS_MODULE,