| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Joonyoung Shim | 3184 | 47.74% | 6 | 7.59% |
| Inki Dae | 1287 | 19.30% | 18 | 22.78% |
| YoungJun Cho | 1065 | 15.97% | 5 | 6.33% |
| Tobias Jakobi | 588 | 8.82% | 9 | 11.39% |
| Marek Szyprowski | 313 | 4.69% | 7 | 8.86% |
| Daniel Vetter | 75 | 1.12% | 4 | 5.06% |
| Ajay Kumar | 25 | 0.37% | 1 | 1.27% |
| Jan Kara | 20 | 0.30% | 1 | 1.27% |
| Sachin Kamat | 18 | 0.27% | 5 | 6.33% |
| Andrzej Hajda | 12 | 0.18% | 4 | 5.06% |
| Sam Ravnborg | 10 | 0.15% | 1 | 1.27% |
| Thierry Reding | 9 | 0.13% | 1 | 1.27% |
| Seung-Woo Kim | 8 | 0.12% | 1 | 1.27% |
| Xiyu Yang | 8 | 0.12% | 1 | 1.27% |
| Alban Browaeys | 7 | 0.10% | 1 | 1.27% |
| Sjoerd Simons | 7 | 0.10% | 1 | 1.27% |
| Paul Cercueil | 5 | 0.07% | 1 | 1.27% |
| Wei Yongjun | 5 | 0.07% | 1 | 1.27% |
| Arnd Bergmann | 5 | 0.07% | 1 | 1.27% |
| Krzysztof Kozlowski | 3 | 0.04% | 1 | 1.27% |
| caihuoqing | 3 | 0.04% | 1 | 1.27% |
| Mark Brown | 3 | 0.04% | 1 | 1.27% |
| Thomas Gleixner | 2 | 0.03% | 1 | 1.27% |
| Sean Paul | 2 | 0.03% | 1 | 1.27% |
| David Howells | 1 | 0.01% | 1 | 1.27% |
| Lorenzo Stoakes | 1 | 0.01% | 1 | 1.27% |
| Masanari Iida | 1 | 0.01% | 1 | 1.27% |
| Min Li | 1 | 0.01% | 1 | 1.27% |
| Tejun Heo | 1 | 0.01% | 1 | 1.27% |
| Total | 6669 | 79 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Samsung Electronics Co.Ltd * Authors: Joonyoung Shim <jy0922.shim@samsung.com> */ #include <linux/refcount.h> #include <linux/clk.h> #include <linux/component.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/workqueue.h> #include <drm/drm_file.h> #include <drm/exynos_drm.h> #include "exynos_drm_drv.h" #include "exynos_drm_g2d.h" #include "exynos_drm_gem.h" #define G2D_HW_MAJOR_VER 4 #define G2D_HW_MINOR_VER 1 /* vaild register range set from user: 0x0104 ~ 0x0880 */ #define G2D_VALID_START 0x0104 #define G2D_VALID_END 0x0880 /* general registers */ #define G2D_SOFT_RESET 0x0000 #define G2D_INTEN 0x0004 #define G2D_INTC_PEND 0x000C #define G2D_DMA_SFR_BASE_ADDR 0x0080 #define G2D_DMA_COMMAND 0x0084 #define G2D_DMA_STATUS 0x008C #define G2D_DMA_HOLD_CMD 0x0090 /* command registers */ #define G2D_BITBLT_START 0x0100 /* registers for base address */ #define G2D_SRC_BASE_ADDR 0x0304 #define G2D_SRC_STRIDE 0x0308 #define G2D_SRC_COLOR_MODE 0x030C #define G2D_SRC_LEFT_TOP 0x0310 #define G2D_SRC_RIGHT_BOTTOM 0x0314 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318 #define G2D_DST_BASE_ADDR 0x0404 #define G2D_DST_STRIDE 0x0408 #define G2D_DST_COLOR_MODE 0x040C #define G2D_DST_LEFT_TOP 0x0410 #define G2D_DST_RIGHT_BOTTOM 0x0414 #define G2D_DST_PLANE2_BASE_ADDR 0x0418 #define G2D_PAT_BASE_ADDR 0x0500 #define G2D_MSK_BASE_ADDR 0x0520 /* G2D_SOFT_RESET */ #define G2D_SFRCLEAR (1 << 1) #define G2D_R (1 << 0) /* G2D_INTEN */ #define G2D_INTEN_ACF (1 << 3) #define G2D_INTEN_UCF (1 << 2) #define G2D_INTEN_GCF (1 << 1) #define G2D_INTEN_SCF (1 << 0) /* G2D_INTC_PEND */ #define G2D_INTP_ACMD_FIN (1 << 3) #define G2D_INTP_UCMD_FIN (1 << 2) #define G2D_INTP_GCMD_FIN (1 << 1) #define G2D_INTP_SCMD_FIN (1 << 0) /* G2D_DMA_COMMAND */ #define G2D_DMA_HALT (1 << 2) #define G2D_DMA_CONTINUE (1 << 1) #define G2D_DMA_START (1 << 0) /* G2D_DMA_STATUS */ #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17) #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1) #define G2D_DMA_DONE (1 << 0) #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17 /* G2D_DMA_HOLD_CMD */ #define G2D_USER_HOLD (1 << 2) #define G2D_LIST_HOLD (1 << 1) #define G2D_BITBLT_HOLD (1 << 0) /* G2D_BITBLT_START */ #define G2D_START_CASESEL (1 << 2) #define G2D_START_NHOLT (1 << 1) #define G2D_START_BITBLT (1 << 0) /* buffer color format */ #define G2D_FMT_XRGB8888 0 #define G2D_FMT_ARGB8888 1 #define G2D_FMT_RGB565 2 #define G2D_FMT_XRGB1555 3 #define G2D_FMT_ARGB1555 4 #define G2D_FMT_XRGB4444 5 #define G2D_FMT_ARGB4444 6 #define G2D_FMT_PACKED_RGB888 7 #define G2D_FMT_A8 11 #define G2D_FMT_L8 12 /* buffer valid length */ #define G2D_LEN_MIN 1 #define G2D_LEN_MAX 8000 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4) #define G2D_CMDLIST_NUM 64 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM) #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2) /* maximum buffer pool size of userptr is 64MB as default */ #define MAX_POOL (64 * 1024 * 1024) enum { BUF_TYPE_GEM = 1, BUF_TYPE_USERPTR, }; enum g2d_reg_type { REG_TYPE_NONE = -1, REG_TYPE_SRC, REG_TYPE_SRC_PLANE2, REG_TYPE_DST, REG_TYPE_DST_PLANE2, REG_TYPE_PAT, REG_TYPE_MSK, MAX_REG_TYPE_NR }; enum g2d_flag_bits { /* * If set, suspends the runqueue worker after the currently * processed node is finished. */ G2D_BIT_SUSPEND_RUNQUEUE, /* * If set, indicates that the engine is currently busy. */ G2D_BIT_ENGINE_BUSY, }; /* cmdlist data structure */ struct g2d_cmdlist { u32 head; unsigned long data[G2D_CMDLIST_DATA_NUM]; u32 last; /* last data offset */ }; /* * A structure of buffer description * * @format: color format * @stride: buffer stride/pitch in bytes * @left_x: the x coordinates of left top corner * @top_y: the y coordinates of left top corner * @right_x: the x coordinates of right bottom corner * @bottom_y: the y coordinates of right bottom corner * */ struct g2d_buf_desc { unsigned int format; unsigned int stride; unsigned int left_x; unsigned int top_y; unsigned int right_x; unsigned int bottom_y; }; /* * A structure of buffer information * * @map_nr: manages the number of mapped buffers * @reg_types: stores regitster type in the order of requested command * @handles: stores buffer handle in its reg_type position * @types: stores buffer type in its reg_type position * @descs: stores buffer description in its reg_type position * */ struct g2d_buf_info { unsigned int map_nr; enum g2d_reg_type reg_types[MAX_REG_TYPE_NR]; void *obj[MAX_REG_TYPE_NR]; unsigned int types[MAX_REG_TYPE_NR]; struct g2d_buf_desc descs[MAX_REG_TYPE_NR]; }; struct drm_exynos_pending_g2d_event { struct drm_pending_event base; struct drm_exynos_g2d_event event; }; struct g2d_cmdlist_userptr { struct list_head list; dma_addr_t dma_addr; unsigned long userptr; unsigned long size; struct page **pages; unsigned int npages; struct sg_table *sgt; refcount_t refcount; bool in_pool; bool out_of_list; }; struct g2d_cmdlist_node { struct list_head list; struct g2d_cmdlist *cmdlist; dma_addr_t dma_addr; struct g2d_buf_info buf_info; struct drm_exynos_pending_g2d_event *event; }; struct g2d_runqueue_node { struct list_head list; struct list_head run_cmdlist; struct list_head event_list; struct drm_file *filp; pid_t pid; struct completion complete; int async; }; struct g2d_data { struct device *dev; void *dma_priv; struct clk *gate_clk; void __iomem *regs; int irq; struct workqueue_struct *g2d_workq; struct work_struct runqueue_work; struct drm_device *drm_dev; unsigned long flags; /* cmdlist */ struct g2d_cmdlist_node *cmdlist_node; struct list_head free_cmdlist; struct mutex cmdlist_mutex; dma_addr_t cmdlist_pool; void *cmdlist_pool_virt; unsigned long cmdlist_dma_attrs; /* runqueue*/ struct g2d_runqueue_node *runqueue_node; struct list_head runqueue; struct mutex runqueue_mutex; struct kmem_cache *runqueue_slab; unsigned long current_pool; unsigned long max_pool; }; static inline void g2d_hw_reset(struct g2d_data *g2d) { writel(G2D_R | G2D_SFRCLEAR, g2d->regs + G2D_SOFT_RESET); clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); } static int g2d_init_cmdlist(struct g2d_data *g2d) { struct device *dev = g2d->dev; struct g2d_cmdlist_node *node; int nr; int ret; struct g2d_buf_info *buf_info; g2d->cmdlist_dma_attrs = DMA_ATTR_WRITE_COMBINE; g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(g2d->drm_dev), G2D_CMDLIST_POOL_SIZE, &g2d->cmdlist_pool, GFP_KERNEL, g2d->cmdlist_dma_attrs); if (!g2d->cmdlist_pool_virt) { dev_err(dev, "failed to allocate dma memory\n"); return -ENOMEM; } node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL); if (!node) { ret = -ENOMEM; goto err; } for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) { unsigned int i; node[nr].cmdlist = g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE; node[nr].dma_addr = g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE; buf_info = &node[nr].buf_info; for (i = 0; i < MAX_REG_TYPE_NR; i++) buf_info->reg_types[i] = REG_TYPE_NONE; list_add_tail(&node[nr].list, &g2d->free_cmdlist); } return 0; err: dma_free_attrs(to_dma_dev(g2d->drm_dev), G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt, g2d->cmdlist_pool, g2d->cmdlist_dma_attrs); return ret; } static void g2d_fini_cmdlist(struct g2d_data *g2d) { kfree(g2d->cmdlist_node); if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) { dma_free_attrs(to_dma_dev(g2d->drm_dev), G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt, g2d->cmdlist_pool, g2d->cmdlist_dma_attrs); } } static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d) { struct device *dev = g2d->dev; struct g2d_cmdlist_node *node; mutex_lock(&g2d->cmdlist_mutex); if (list_empty(&g2d->free_cmdlist)) { dev_err(dev, "there is no free cmdlist\n"); mutex_unlock(&g2d->cmdlist_mutex); return NULL; } node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node, list); list_del_init(&node->list); mutex_unlock(&g2d->cmdlist_mutex); return node; } static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node) { mutex_lock(&g2d->cmdlist_mutex); list_move_tail(&node->list, &g2d->free_cmdlist); mutex_unlock(&g2d->cmdlist_mutex); } static void g2d_add_cmdlist_to_inuse(struct drm_exynos_file_private *file_priv, struct g2d_cmdlist_node *node) { struct g2d_cmdlist_node *lnode; if (list_empty(&file_priv->inuse_cmdlist)) goto add_to_list; /* this links to base address of new cmdlist */ lnode = list_entry(file_priv->inuse_cmdlist.prev, struct g2d_cmdlist_node, list); lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr; add_to_list: list_add_tail(&node->list, &file_priv->inuse_cmdlist); if (node->event) list_add_tail(&node->event->base.link, &file_priv->event_list); } static void g2d_userptr_put_dma_addr(struct g2d_data *g2d, void *obj, bool force) { struct g2d_cmdlist_userptr *g2d_userptr = obj; if (!obj) return; if (force) goto out; refcount_dec(&g2d_userptr->refcount); if (refcount_read(&g2d_userptr->refcount) > 0) return; if (g2d_userptr->in_pool) return; out: dma_unmap_sgtable(to_dma_dev(g2d->drm_dev), g2d_userptr->sgt, DMA_BIDIRECTIONAL, 0); unpin_user_pages_dirty_lock(g2d_userptr->pages, g2d_userptr->npages, true); kvfree(g2d_userptr->pages); if (!g2d_userptr->out_of_list) list_del_init(&g2d_userptr->list); sg_free_table(g2d_userptr->sgt); kfree(g2d_userptr->sgt); kfree(g2d_userptr); } static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d, unsigned long userptr, unsigned long size, struct drm_file *filp, void **obj) { struct drm_exynos_file_private *file_priv = filp->driver_priv; struct g2d_cmdlist_userptr *g2d_userptr; struct sg_table *sgt; unsigned long start, end; unsigned int npages, offset; int ret; if (!size) { DRM_DEV_ERROR(g2d->dev, "invalid userptr size.\n"); return ERR_PTR(-EINVAL); } /* check if userptr already exists in userptr_list. */ list_for_each_entry(g2d_userptr, &file_priv->userptr_list, list) { if (g2d_userptr->userptr == userptr) { /* * also check size because there could be same address * and different size. */ if (g2d_userptr->size == size) { refcount_inc(&g2d_userptr->refcount); *obj = g2d_userptr; return &g2d_userptr->dma_addr; } /* * at this moment, maybe g2d dma is accessing this * g2d_userptr memory region so just remove this * g2d_userptr object from userptr_list not to be * referred again and also except it the userptr * pool to be released after the dma access completion. */ g2d_userptr->out_of_list = true; g2d_userptr->in_pool = false; list_del_init(&g2d_userptr->list); break; } } g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL); if (!g2d_userptr) return ERR_PTR(-ENOMEM); refcount_set(&g2d_userptr->refcount, 1); g2d_userptr->size = size; start = userptr & PAGE_MASK; offset = userptr & ~PAGE_MASK; end = PAGE_ALIGN(userptr + size); npages = (end - start) >> PAGE_SHIFT; g2d_userptr->pages = kvmalloc_array(npages, sizeof(*g2d_userptr->pages), GFP_KERNEL); if (!g2d_userptr->pages) { ret = -ENOMEM; goto err_free; } ret = pin_user_pages_fast(start, npages, FOLL_WRITE | FOLL_LONGTERM, g2d_userptr->pages); if (ret != npages) { DRM_DEV_ERROR(g2d->dev, "failed to get user pages from userptr.\n"); if (ret < 0) goto err_destroy_pages; npages = ret; ret = -EFAULT; goto err_unpin_pages; } g2d_userptr->npages = npages; sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) { ret = -ENOMEM; goto err_unpin_pages; } ret = sg_alloc_table_from_pages(sgt, g2d_userptr->pages, npages, offset, size, GFP_KERNEL); if (ret < 0) { DRM_DEV_ERROR(g2d->dev, "failed to get sgt from pages.\n"); goto err_free_sgt; } g2d_userptr->sgt = sgt; ret = dma_map_sgtable(to_dma_dev(g2d->drm_dev), sgt, DMA_BIDIRECTIONAL, 0); if (ret) { DRM_DEV_ERROR(g2d->dev, "failed to map sgt with dma region.\n"); goto err_sg_free_table; } g2d_userptr->dma_addr = sgt->sgl[0].dma_address; g2d_userptr->userptr = userptr; list_add_tail(&g2d_userptr->list, &file_priv->userptr_list); if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) { g2d->current_pool += npages << PAGE_SHIFT; g2d_userptr->in_pool = true; } *obj = g2d_userptr; return &g2d_userptr->dma_addr; err_sg_free_table: sg_free_table(sgt); err_free_sgt: kfree(sgt); err_unpin_pages: unpin_user_pages(g2d_userptr->pages, npages); err_destroy_pages: kvfree(g2d_userptr->pages); err_free: kfree(g2d_userptr); return ERR_PTR(ret); } static void g2d_userptr_free_all(struct g2d_data *g2d, struct drm_file *filp) { struct drm_exynos_file_private *file_priv = filp->driver_priv; struct g2d_cmdlist_userptr *g2d_userptr, *n; list_for_each_entry_safe(g2d_userptr, n, &file_priv->userptr_list, list) if (g2d_userptr->in_pool) g2d_userptr_put_dma_addr(g2d, g2d_userptr, true); g2d->current_pool = 0; } static enum g2d_reg_type g2d_get_reg_type(struct g2d_data *g2d, int reg_offset) { enum g2d_reg_type reg_type; switch (reg_offset) { case G2D_SRC_BASE_ADDR: case G2D_SRC_STRIDE: case G2D_SRC_COLOR_MODE: case G2D_SRC_LEFT_TOP: case G2D_SRC_RIGHT_BOTTOM: reg_type = REG_TYPE_SRC; break; case G2D_SRC_PLANE2_BASE_ADDR: reg_type = REG_TYPE_SRC_PLANE2; break; case G2D_DST_BASE_ADDR: case G2D_DST_STRIDE: case G2D_DST_COLOR_MODE: case G2D_DST_LEFT_TOP: case G2D_DST_RIGHT_BOTTOM: reg_type = REG_TYPE_DST; break; case G2D_DST_PLANE2_BASE_ADDR: reg_type = REG_TYPE_DST_PLANE2; break; case G2D_PAT_BASE_ADDR: reg_type = REG_TYPE_PAT; break; case G2D_MSK_BASE_ADDR: reg_type = REG_TYPE_MSK; break; default: reg_type = REG_TYPE_NONE; DRM_DEV_ERROR(g2d->dev, "Unknown register offset![%d]\n", reg_offset); break; } return reg_type; } static unsigned long g2d_get_buf_bpp(unsigned int format) { unsigned long bpp; switch (format) { case G2D_FMT_XRGB8888: case G2D_FMT_ARGB8888: bpp = 4; break; case G2D_FMT_RGB565: case G2D_FMT_XRGB1555: case G2D_FMT_ARGB1555: case G2D_FMT_XRGB4444: case G2D_FMT_ARGB4444: bpp = 2; break; case G2D_FMT_PACKED_RGB888: bpp = 3; break; default: bpp = 1; break; } return bpp; } static bool g2d_check_buf_desc_is_valid(struct g2d_data *g2d, struct g2d_buf_desc *buf_desc, enum g2d_reg_type reg_type, unsigned long size) { int width, height; unsigned long bpp, last_pos; /* * check source and destination buffers only. * so the others are always valid. */ if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST) return true; /* This check also makes sure that right_x > left_x. */ width = (int)buf_desc->right_x - (int)buf_desc->left_x; if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) { DRM_DEV_ERROR(g2d->dev, "width[%d] is out of range!\n", width); return false; } /* This check also makes sure that bottom_y > top_y. */ height = (int)buf_desc->bottom_y - (int)buf_desc->top_y; if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) { DRM_DEV_ERROR(g2d->dev, "height[%d] is out of range!\n", height); return false; } bpp = g2d_get_buf_bpp(buf_desc->format); /* Compute the position of the last byte that the engine accesses. */ last_pos = ((unsigned long)buf_desc->bottom_y - 1) * (unsigned long)buf_desc->stride + (unsigned long)buf_desc->right_x * bpp - 1; /* * Since right_x > left_x and bottom_y > top_y we already know * that the first_pos < last_pos (first_pos being the position * of the first byte the engine accesses), it just remains to * check if last_pos is smaller then the buffer size. */ if (last_pos >= size) { DRM_DEV_ERROR(g2d->dev, "last engine access position [%lu] " "is out of range [%lu]!\n", last_pos, size); return false; } return true; } static int g2d_map_cmdlist_gem(struct g2d_data *g2d, struct g2d_cmdlist_node *node, struct drm_device *drm_dev, struct drm_file *file) { struct g2d_cmdlist *cmdlist = node->cmdlist; struct g2d_buf_info *buf_info = &node->buf_info; int offset; int ret; int i; for (i = 0; i < buf_info->map_nr; i++) { struct g2d_buf_desc *buf_desc; enum g2d_reg_type reg_type; int reg_pos; unsigned long handle; dma_addr_t *addr; reg_pos = cmdlist->last - 2 * (i + 1); offset = cmdlist->data[reg_pos]; handle = cmdlist->data[reg_pos + 1]; reg_type = g2d_get_reg_type(g2d, offset); if (reg_type == REG_TYPE_NONE) { ret = -EFAULT; goto err; } buf_desc = &buf_info->descs[reg_type]; if (buf_info->types[reg_type] == BUF_TYPE_GEM) { struct exynos_drm_gem *exynos_gem; exynos_gem = exynos_drm_gem_get(file, handle); if (!exynos_gem) { ret = -EFAULT; goto err; } if (!g2d_check_buf_desc_is_valid(g2d, buf_desc, reg_type, exynos_gem->size)) { exynos_drm_gem_put(exynos_gem); ret = -EFAULT; goto err; } addr = &exynos_gem->dma_addr; buf_info->obj[reg_type] = exynos_gem; } else { struct drm_exynos_g2d_userptr g2d_userptr; if (copy_from_user(&g2d_userptr, (void __user *)handle, sizeof(struct drm_exynos_g2d_userptr))) { ret = -EFAULT; goto err; } if (!g2d_check_buf_desc_is_valid(g2d, buf_desc, reg_type, g2d_userptr.size)) { ret = -EFAULT; goto err; } addr = g2d_userptr_get_dma_addr(g2d, g2d_userptr.userptr, g2d_userptr.size, file, &buf_info->obj[reg_type]); if (IS_ERR(addr)) { ret = -EFAULT; goto err; } } cmdlist->data[reg_pos + 1] = *addr; buf_info->reg_types[i] = reg_type; } return 0; err: buf_info->map_nr = i; return ret; } static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d, struct g2d_cmdlist_node *node, struct drm_file *filp) { struct g2d_buf_info *buf_info = &node->buf_info; int i; for (i = 0; i < buf_info->map_nr; i++) { struct g2d_buf_desc *buf_desc; enum g2d_reg_type reg_type; void *obj; reg_type = buf_info->reg_types[i]; buf_desc = &buf_info->descs[reg_type]; obj = buf_info->obj[reg_type]; if (buf_info->types[reg_type] == BUF_TYPE_GEM) exynos_drm_gem_put(obj); else g2d_userptr_put_dma_addr(g2d, obj, false); buf_info->reg_types[i] = REG_TYPE_NONE; buf_info->obj[reg_type] = NULL; buf_info->types[reg_type] = 0; memset(buf_desc, 0x00, sizeof(*buf_desc)); } buf_info->map_nr = 0; } static void g2d_dma_start(struct g2d_data *g2d, struct g2d_runqueue_node *runqueue_node) { struct g2d_cmdlist_node *node = list_first_entry(&runqueue_node->run_cmdlist, struct g2d_cmdlist_node, list); set_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); } static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d) { struct g2d_runqueue_node *runqueue_node; if (list_empty(&g2d->runqueue)) return NULL; runqueue_node = list_first_entry(&g2d->runqueue, struct g2d_runqueue_node, list); list_del_init(&runqueue_node->list); return runqueue_node; } static void g2d_free_runqueue_node(struct g2d_data *g2d, struct g2d_runqueue_node *runqueue_node) { struct g2d_cmdlist_node *node; mutex_lock(&g2d->cmdlist_mutex); /* * commands in run_cmdlist have been completed so unmap all gem * objects in each command node so that they are unreferenced. */ list_for_each_entry(node, &runqueue_node->run_cmdlist, list) g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp); list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist); mutex_unlock(&g2d->cmdlist_mutex); kmem_cache_free(g2d->runqueue_slab, runqueue_node); } /** * g2d_remove_runqueue_nodes - remove items from the list of runqueue nodes * @g2d: G2D state object * @file: if not zero, only remove items with this DRM file * * Has to be called under runqueue lock. */ static void g2d_remove_runqueue_nodes(struct g2d_data *g2d, struct drm_file *file) { struct g2d_runqueue_node *node, *n; if (list_empty(&g2d->runqueue)) return; list_for_each_entry_safe(node, n, &g2d->runqueue, list) { if (file && node->filp != file) continue; list_del_init(&node->list); g2d_free_runqueue_node(g2d, node); } } static void g2d_runqueue_worker(struct work_struct *work) { struct g2d_data *g2d = container_of(work, struct g2d_data, runqueue_work); struct g2d_runqueue_node *runqueue_node; /* * The engine is busy and the completion of the current node is going * to poke the runqueue worker, so nothing to do here. */ if (test_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags)) return; mutex_lock(&g2d->runqueue_mutex); runqueue_node = g2d->runqueue_node; g2d->runqueue_node = NULL; if (runqueue_node) { pm_runtime_mark_last_busy(g2d->dev); pm_runtime_put_autosuspend(g2d->dev); complete(&runqueue_node->complete); if (runqueue_node->async) g2d_free_runqueue_node(g2d, runqueue_node); } if (!test_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags)) { g2d->runqueue_node = g2d_get_runqueue_node(g2d); if (g2d->runqueue_node) { int ret; ret = pm_runtime_resume_and_get(g2d->dev); if (ret < 0) { dev_err(g2d->dev, "failed to enable G2D device.\n"); goto out; } g2d_dma_start(g2d, g2d->runqueue_node); } } out: mutex_unlock(&g2d->runqueue_mutex); } static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no) { struct drm_device *drm_dev = g2d->drm_dev; struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node; struct drm_exynos_pending_g2d_event *e; struct timespec64 now; if (list_empty(&runqueue_node->event_list)) return; e = list_first_entry(&runqueue_node->event_list, struct drm_exynos_pending_g2d_event, base.link); ktime_get_ts64(&now); e->event.tv_sec = now.tv_sec; e->event.tv_usec = now.tv_nsec / NSEC_PER_USEC; e->event.cmdlist_no = cmdlist_no; drm_send_event(drm_dev, &e->base); } static irqreturn_t g2d_irq_handler(int irq, void *dev_id) { struct g2d_data *g2d = dev_id; u32 pending; pending = readl_relaxed(g2d->regs + G2D_INTC_PEND); if (pending) writel_relaxed(pending, g2d->regs + G2D_INTC_PEND); if (pending & G2D_INTP_GCMD_FIN) { u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS); cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >> G2D_DMA_LIST_DONE_COUNT_OFFSET; g2d_finish_event(g2d, cmdlist_no); writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD); if (!(pending & G2D_INTP_ACMD_FIN)) { writel_relaxed(G2D_DMA_CONTINUE, g2d->regs + G2D_DMA_COMMAND); } } if (pending & G2D_INTP_ACMD_FIN) { clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); queue_work(g2d->g2d_workq, &g2d->runqueue_work); } return IRQ_HANDLED; } /** * g2d_wait_finish - wait for the G2D engine to finish the current runqueue node * @g2d: G2D state object * @file: if not zero, only wait if the current runqueue node belongs * to the DRM file * * Should the engine not become idle after a 100ms timeout, a hardware * reset is issued. */ static void g2d_wait_finish(struct g2d_data *g2d, struct drm_file *file) { struct device *dev = g2d->dev; struct g2d_runqueue_node *runqueue_node = NULL; unsigned int tries = 10; mutex_lock(&g2d->runqueue_mutex); /* If no node is currently processed, we have nothing to do. */ if (!g2d->runqueue_node) goto out; runqueue_node = g2d->runqueue_node; /* Check if the currently processed item belongs to us. */ if (file && runqueue_node->filp != file) goto out; mutex_unlock(&g2d->runqueue_mutex); /* Wait for the G2D engine to finish. */ while (tries-- && (g2d->runqueue_node == runqueue_node)) mdelay(10); mutex_lock(&g2d->runqueue_mutex); if (g2d->runqueue_node != runqueue_node) goto out; dev_err(dev, "wait timed out, resetting engine...\n"); g2d_hw_reset(g2d); /* * After the hardware reset of the engine we are going to loose * the IRQ which triggers the PM runtime put(). * So do this manually here. */ pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); complete(&runqueue_node->complete); if (runqueue_node->async) g2d_free_runqueue_node(g2d, runqueue_node); out: mutex_unlock(&g2d->runqueue_mutex); } static int g2d_check_reg_offset(struct g2d_data *g2d, struct g2d_cmdlist_node *node, int nr, bool for_addr) { struct g2d_cmdlist *cmdlist = node->cmdlist; int reg_offset; int index; int i; for (i = 0; i < nr; i++) { struct g2d_buf_info *buf_info = &node->buf_info; struct g2d_buf_desc *buf_desc; enum g2d_reg_type reg_type; unsigned long value; index = cmdlist->last - 2 * (i + 1); reg_offset = cmdlist->data[index] & ~0xfffff000; if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END) goto err; if (reg_offset % 4) goto err; switch (reg_offset) { case G2D_SRC_BASE_ADDR: case G2D_SRC_PLANE2_BASE_ADDR: case G2D_DST_BASE_ADDR: case G2D_DST_PLANE2_BASE_ADDR: case G2D_PAT_BASE_ADDR: case G2D_MSK_BASE_ADDR: if (!for_addr) goto err; reg_type = g2d_get_reg_type(g2d, reg_offset); /* check userptr buffer type. */ if ((cmdlist->data[index] & ~0x7fffffff) >> 31) { buf_info->types[reg_type] = BUF_TYPE_USERPTR; cmdlist->data[index] &= ~G2D_BUF_USERPTR; } else buf_info->types[reg_type] = BUF_TYPE_GEM; break; case G2D_SRC_STRIDE: case G2D_DST_STRIDE: if (for_addr) goto err; reg_type = g2d_get_reg_type(g2d, reg_offset); buf_desc = &buf_info->descs[reg_type]; buf_desc->stride = cmdlist->data[index + 1]; break; case G2D_SRC_COLOR_MODE: case G2D_DST_COLOR_MODE: if (for_addr) goto err; reg_type = g2d_get_reg_type(g2d, reg_offset); buf_desc = &buf_info->descs[reg_type]; value = cmdlist->data[index + 1]; buf_desc->format = value & 0xf; break; case G2D_SRC_LEFT_TOP: case G2D_DST_LEFT_TOP: if (for_addr) goto err; reg_type = g2d_get_reg_type(g2d, reg_offset); buf_desc = &buf_info->descs[reg_type]; value = cmdlist->data[index + 1]; buf_desc->left_x = value & 0x1fff; buf_desc->top_y = (value & 0x1fff0000) >> 16; break; case G2D_SRC_RIGHT_BOTTOM: case G2D_DST_RIGHT_BOTTOM: if (for_addr) goto err; reg_type = g2d_get_reg_type(g2d, reg_offset); buf_desc = &buf_info->descs[reg_type]; value = cmdlist->data[index + 1]; buf_desc->right_x = value & 0x1fff; buf_desc->bottom_y = (value & 0x1fff0000) >> 16; break; default: if (for_addr) goto err; break; } } return 0; err: dev_err(g2d->dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]); return -EINVAL; } /* ioctl functions */ int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data, struct drm_file *file) { struct drm_exynos_g2d_get_ver *ver = data; ver->major = G2D_HW_MAJOR_VER; ver->minor = G2D_HW_MINOR_VER; return 0; } int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, struct drm_file *file) { struct drm_exynos_file_private *file_priv = file->driver_priv; struct exynos_drm_private *priv = drm_dev->dev_private; struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev); struct drm_exynos_g2d_set_cmdlist *req = data; struct drm_exynos_g2d_cmd *cmd; struct drm_exynos_pending_g2d_event *e; struct g2d_cmdlist_node *node; struct g2d_cmdlist *cmdlist; int size; int ret; node = g2d_get_cmdlist(g2d); if (!node) return -ENOMEM; /* * To avoid an integer overflow for the later size computations, we * enforce a maximum number of submitted commands here. This limit is * sufficient for all conceivable usage cases of the G2D. */ if (req->cmd_nr > G2D_CMDLIST_DATA_NUM || req->cmd_buf_nr > G2D_CMDLIST_DATA_NUM) { dev_err(g2d->dev, "number of submitted G2D commands exceeds limit\n"); return -EINVAL; } node->event = NULL; if (req->event_type != G2D_EVENT_NOT) { e = kzalloc(sizeof(*node->event), GFP_KERNEL); if (!e) { ret = -ENOMEM; goto err; } e->event.base.type = DRM_EXYNOS_G2D_EVENT; e->event.base.length = sizeof(e->event); e->event.user_data = req->user_data; ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base); if (ret) { kfree(e); goto err; } node->event = e; } cmdlist = node->cmdlist; cmdlist->last = 0; /* * If don't clear SFR registers, the cmdlist is affected by register * values of previous cmdlist. G2D hw executes SFR clear command and * a next command at the same time then the next command is ignored and * is executed rightly from next next command, so needs a dummy command * to next command of SFR clear command. */ cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET; cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR; cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR; cmdlist->data[cmdlist->last++] = 0; /* * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG * and GCF bit should be set to INTEN register if user wants * G2D interrupt event once current command list execution is * finished. * Otherwise only ACF bit should be set to INTEN register so * that one interrupt is occurred after all command lists * have been completed. */ if (node->event) { cmdlist->data[cmdlist->last++] = G2D_INTEN; cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF; cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; } else { cmdlist->data[cmdlist->last++] = G2D_INTEN; cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF; } /* * Check the size of cmdlist. The 2 that is added last comes from * the implicit G2D_BITBLT_START that is appended once we have * checked all the submitted commands. */ size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; if (size > G2D_CMDLIST_DATA_NUM) { dev_err(g2d->dev, "cmdlist size is too big\n"); ret = -EINVAL; goto err_free_event; } cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd; if (copy_from_user(cmdlist->data + cmdlist->last, (void __user *)cmd, sizeof(*cmd) * req->cmd_nr)) { ret = -EFAULT; goto err_free_event; } cmdlist->last += req->cmd_nr * 2; ret = g2d_check_reg_offset(g2d, node, req->cmd_nr, false); if (ret < 0) goto err_free_event; node->buf_info.map_nr = req->cmd_buf_nr; if (req->cmd_buf_nr) { struct drm_exynos_g2d_cmd *cmd_buf; cmd_buf = (struct drm_exynos_g2d_cmd *) (unsigned long)req->cmd_buf; if (copy_from_user(cmdlist->data + cmdlist->last, (void __user *)cmd_buf, sizeof(*cmd_buf) * req->cmd_buf_nr)) { ret = -EFAULT; goto err_free_event; } cmdlist->last += req->cmd_buf_nr * 2; ret = g2d_check_reg_offset(g2d, node, req->cmd_buf_nr, true); if (ret < 0) goto err_free_event; ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file); if (ret < 0) goto err_unmap; } cmdlist->data[cmdlist->last++] = G2D_BITBLT_START; cmdlist->data[cmdlist->last++] = G2D_START_BITBLT; /* head */ cmdlist->head = cmdlist->last / 2; /* tail */ cmdlist->data[cmdlist->last] = 0; g2d_add_cmdlist_to_inuse(file_priv, node); return 0; err_unmap: g2d_unmap_cmdlist_gem(g2d, node, file); err_free_event: if (node->event) drm_event_cancel_free(drm_dev, &node->event->base); err: g2d_put_cmdlist(g2d, node); return ret; } int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, struct drm_file *file) { struct drm_exynos_file_private *file_priv = file->driver_priv; struct exynos_drm_private *priv = drm_dev->dev_private; struct g2d_data *g2d = dev_get_drvdata(priv->g2d_dev); struct drm_exynos_g2d_exec *req = data; struct g2d_runqueue_node *runqueue_node; struct list_head *run_cmdlist; struct list_head *event_list; runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); if (!runqueue_node) return -ENOMEM; run_cmdlist = &runqueue_node->run_cmdlist; event_list = &runqueue_node->event_list; INIT_LIST_HEAD(run_cmdlist); INIT_LIST_HEAD(event_list); init_completion(&runqueue_node->complete); runqueue_node->async = req->async; list_splice_init(&file_priv->inuse_cmdlist, run_cmdlist); list_splice_init(&file_priv->event_list, event_list); if (list_empty(run_cmdlist)) { dev_err(g2d->dev, "there is no inuse cmdlist\n"); kmem_cache_free(g2d->runqueue_slab, runqueue_node); return -EPERM; } mutex_lock(&g2d->runqueue_mutex); runqueue_node->pid = current->pid; runqueue_node->filp = file; list_add_tail(&runqueue_node->list, &g2d->runqueue); mutex_unlock(&g2d->runqueue_mutex); /* Let the runqueue know that there is work to do. */ queue_work(g2d->g2d_workq, &g2d->runqueue_work); if (req->async) goto out; wait_for_completion(&runqueue_node->complete); g2d_free_runqueue_node(g2d, runqueue_node); out: return 0; } int g2d_open(struct drm_device *drm_dev, struct drm_file *file) { struct drm_exynos_file_private *file_priv = file->driver_priv; INIT_LIST_HEAD(&file_priv->inuse_cmdlist); INIT_LIST_HEAD(&file_priv->event_list); INIT_LIST_HEAD(&file_priv->userptr_list); return 0; } void g2d_close(struct drm_device *drm_dev, struct drm_file *file) { struct drm_exynos_file_private *file_priv = file->driver_priv; struct exynos_drm_private *priv = drm_dev->dev_private; struct g2d_data *g2d; struct g2d_cmdlist_node *node, *n; if (!priv->g2d_dev) return; g2d = dev_get_drvdata(priv->g2d_dev); /* Remove the runqueue nodes that belong to us. */ mutex_lock(&g2d->runqueue_mutex); g2d_remove_runqueue_nodes(g2d, file); mutex_unlock(&g2d->runqueue_mutex); /* * Wait for the runqueue worker to finish its current node. * After this the engine should no longer be accessing any * memory belonging to us. */ g2d_wait_finish(g2d, file); /* * Even after the engine is idle, there might still be stale cmdlists * (i.e. cmdlisst which we submitted but never executed) around, with * their corresponding GEM/userptr buffers. * Properly unmap these buffers here. */ mutex_lock(&g2d->cmdlist_mutex); list_for_each_entry_safe(node, n, &file_priv->inuse_cmdlist, list) { g2d_unmap_cmdlist_gem(g2d, node, file); list_move_tail(&node->list, &g2d->free_cmdlist); } mutex_unlock(&g2d->cmdlist_mutex); /* release all g2d_userptr in pool. */ g2d_userptr_free_all(g2d, file); } static int g2d_bind(struct device *dev, struct device *master, void *data) { struct g2d_data *g2d = dev_get_drvdata(dev); struct drm_device *drm_dev = data; struct exynos_drm_private *priv = drm_dev->dev_private; int ret; g2d->drm_dev = drm_dev; /* allocate dma-aware cmdlist buffer. */ ret = g2d_init_cmdlist(g2d); if (ret < 0) { dev_err(dev, "cmdlist init failed\n"); return ret; } ret = exynos_drm_register_dma(drm_dev, dev, &g2d->dma_priv); if (ret < 0) { dev_err(dev, "failed to enable iommu.\n"); g2d_fini_cmdlist(g2d); return ret; } priv->g2d_dev = dev; dev_info(dev, "The Exynos G2D (ver %d.%d) successfully registered.\n", G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); return 0; } static void g2d_unbind(struct device *dev, struct device *master, void *data) { struct g2d_data *g2d = dev_get_drvdata(dev); struct drm_device *drm_dev = data; struct exynos_drm_private *priv = drm_dev->dev_private; /* Suspend operation and wait for engine idle. */ set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); g2d_wait_finish(g2d, NULL); priv->g2d_dev = NULL; cancel_work_sync(&g2d->runqueue_work); exynos_drm_unregister_dma(g2d->drm_dev, dev, &g2d->dma_priv); } static const struct component_ops g2d_component_ops = { .bind = g2d_bind, .unbind = g2d_unbind, }; static int g2d_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct g2d_data *g2d; int ret; g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL); if (!g2d) return -ENOMEM; g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab", sizeof(struct g2d_runqueue_node), 0, 0, NULL); if (!g2d->runqueue_slab) return -ENOMEM; g2d->dev = dev; g2d->g2d_workq = create_singlethread_workqueue("g2d"); if (!g2d->g2d_workq) { dev_err(dev, "failed to create workqueue\n"); ret = -EINVAL; goto err_destroy_slab; } INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker); INIT_LIST_HEAD(&g2d->free_cmdlist); INIT_LIST_HEAD(&g2d->runqueue); mutex_init(&g2d->cmdlist_mutex); mutex_init(&g2d->runqueue_mutex); g2d->gate_clk = devm_clk_get(dev, "fimg2d"); if (IS_ERR(g2d->gate_clk)) { dev_err(dev, "failed to get gate clock\n"); ret = PTR_ERR(g2d->gate_clk); goto err_destroy_workqueue; } pm_runtime_use_autosuspend(dev); pm_runtime_set_autosuspend_delay(dev, 2000); pm_runtime_enable(dev); clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); g2d->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(g2d->regs)) { ret = PTR_ERR(g2d->regs); goto err_put_clk; } g2d->irq = platform_get_irq(pdev, 0); if (g2d->irq < 0) { ret = g2d->irq; goto err_put_clk; } ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0, "drm_g2d", g2d); if (ret < 0) { dev_err(dev, "irq request failed\n"); goto err_put_clk; } g2d->max_pool = MAX_POOL; platform_set_drvdata(pdev, g2d); ret = component_add(dev, &g2d_component_ops); if (ret < 0) { dev_err(dev, "failed to register drm g2d device\n"); goto err_put_clk; } return 0; err_put_clk: pm_runtime_disable(dev); err_destroy_workqueue: destroy_workqueue(g2d->g2d_workq); err_destroy_slab: kmem_cache_destroy(g2d->runqueue_slab); return ret; } static int g2d_remove(struct platform_device *pdev) { struct g2d_data *g2d = platform_get_drvdata(pdev); component_del(&pdev->dev, &g2d_component_ops); /* There should be no locking needed here. */ g2d_remove_runqueue_nodes(g2d, NULL); pm_runtime_dont_use_autosuspend(&pdev->dev); pm_runtime_disable(&pdev->dev); g2d_fini_cmdlist(g2d); destroy_workqueue(g2d->g2d_workq); kmem_cache_destroy(g2d->runqueue_slab); return 0; } static int g2d_suspend(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); /* * Suspend the runqueue worker operation and wait until the G2D * engine is idle. */ set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); g2d_wait_finish(g2d, NULL); flush_work(&g2d->runqueue_work); return 0; } static int g2d_resume(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); queue_work(g2d->g2d_workq, &g2d->runqueue_work); return 0; } static int g2d_runtime_suspend(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); clk_disable_unprepare(g2d->gate_clk); return 0; } static int g2d_runtime_resume(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(g2d->gate_clk); if (ret < 0) dev_warn(dev, "failed to enable clock.\n"); return ret; } static const struct dev_pm_ops g2d_pm_ops = { SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume) RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL) }; static const struct of_device_id exynos_g2d_match[] = { { .compatible = "samsung,exynos5250-g2d" }, { .compatible = "samsung,exynos4212-g2d" }, {}, }; MODULE_DEVICE_TABLE(of, exynos_g2d_match); struct platform_driver g2d_driver = { .probe = g2d_probe, .remove = g2d_remove, .driver = { .name = "exynos-drm-g2d", .owner = THIS_MODULE, .pm = pm_ptr(&g2d_pm_ops), .of_match_table = exynos_g2d_match, }, };
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