drivers/gpu/drm/exynos/exynos_drm_ipp.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (c) 2017 Samsung Electronics Co., Ltd.
   4  */
   5
   6 #ifndef _EXYNOS_DRM_IPP_H_
   7 #define _EXYNOS_DRM_IPP_H_
   8
   9 struct exynos_drm_ipp;
  10 struct exynos_drm_ipp_task;
  11
  12 /**
  13  * struct exynos_drm_ipp_funcs - exynos_drm_ipp control functions
  14  */
  15 struct exynos_drm_ipp_funcs {
  16         /**
  17          * @commit:
  18          *
  19          * This is the main entry point to start framebuffer processing
  20          * in the hardware. The exynos_drm_ipp_task has been already validated.
  21          * This function must not wait until the device finishes processing.
  22          * When the driver finishes processing, it has to call
  23          * exynos_exynos_drm_ipp_task_done() function.
  24          *
  25          * RETURNS:
  26          *
  27          * 0 on success or negative error codes in case of failure.
  28          */
  29         int (*commit)(struct exynos_drm_ipp *ipp,
  30                       struct exynos_drm_ipp_task *task);
  31
  32         /**
  33          * @abort:
  34          *
  35          * Informs the driver that it has to abort the currently running
  36          * task as soon as possible (i.e. as soon as it can stop the device
  37          * safely), even if the task would not have been finished by then.
  38          * After the driver performs the necessary steps, it has to call
  39          * exynos_drm_ipp_task_done() (as if the task ended normally).
  40          * This function does not have to (and will usually not) wait
  41          * until the device enters a state when it can be stopped.
  42          */
  43         void (*abort)(struct exynos_drm_ipp *ipp,
  44                       struct exynos_drm_ipp_task *task);
  45 };
  46
  47 /**
  48  * struct exynos_drm_ipp - central picture processor module structure
  49  */
  50 struct exynos_drm_ipp {
  51         struct drm_device *drm_dev;
  52         struct device *dev;
  53         struct list_head head;
  54         unsigned int id;
  55
  56         const char *name;
  57         const struct exynos_drm_ipp_funcs *funcs;
  58         unsigned int capabilities;
  59         const struct exynos_drm_ipp_formats *formats;
  60         unsigned int num_formats;
  61         atomic_t sequence;
  62
  63         spinlock_t lock;
  64         struct exynos_drm_ipp_task *task;
  65         struct list_head todo_list;
  66         wait_queue_head_t done_wq;
  67 };
  68
  69 struct exynos_drm_ipp_buffer {
  70         struct drm_exynos_ipp_task_buffer buf;
  71         struct drm_exynos_ipp_task_rect rect;
  72
  73         struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
  74         const struct drm_format_info *format;
  75         dma_addr_t dma_addr[MAX_FB_BUFFER];
  76 };
  77
  78 /**
  79  * struct exynos_drm_ipp_task - a structure describing transformation that
  80  * has to be performed by the picture processor hardware module
  81  */
  82 struct exynos_drm_ipp_task {
  83         struct device *dev;
  84         struct exynos_drm_ipp *ipp;
  85         struct list_head head;
  86
  87         struct exynos_drm_ipp_buffer src;
  88         struct exynos_drm_ipp_buffer dst;
  89
  90         struct drm_exynos_ipp_task_transform transform;
  91         struct drm_exynos_ipp_task_alpha alpha;
  92
  93         struct work_struct cleanup_work;
  94         unsigned int flags;
  95         int ret;
  96
  97         struct drm_pending_exynos_ipp_event *event;
  98 };
  99
 100 #define DRM_EXYNOS_IPP_TASK_DONE        (1 << 0)
 101 #define DRM_EXYNOS_IPP_TASK_ASYNC       (1 << 1)
 102
 103 struct exynos_drm_ipp_formats {
 104         uint32_t fourcc;
 105         uint32_t type;
 106         uint64_t modifier;
 107         const struct drm_exynos_ipp_limit *limits;
 108         unsigned int num_limits;
 109 };
 110
 111 /* helper macros to set exynos_drm_ipp_formats structure and limits*/
 112 #define IPP_SRCDST_MFORMAT(f, m, l) \
 113         .fourcc = DRM_FORMAT_##f, .modifier = m, .limits = l, \
 114         .num_limits = ARRAY_SIZE(l), \
 115         .type = (DRM_EXYNOS_IPP_FORMAT_SOURCE | \
 116                  DRM_EXYNOS_IPP_FORMAT_DESTINATION)
 117
 118 #define IPP_SRCDST_FORMAT(f, l) IPP_SRCDST_MFORMAT(f, 0, l)
 119
 120 #define IPP_SIZE_LIMIT(l, val...)       \
 121         .type = (DRM_EXYNOS_IPP_LIMIT_TYPE_SIZE | \
 122                  DRM_EXYNOS_IPP_LIMIT_SIZE_##l), val
 123
 124 #define IPP_SCALE_LIMIT(val...)         \
 125         .type = (DRM_EXYNOS_IPP_LIMIT_TYPE_SCALE), val
 126
 127 int exynos_drm_ipp_register(struct device *dev, struct exynos_drm_ipp *ipp,
 128                 const struct exynos_drm_ipp_funcs *funcs, unsigned int caps,
 129                 const struct exynos_drm_ipp_formats *formats,
 130                 unsigned int num_formats, const char *name);
 131 void exynos_drm_ipp_unregister(struct device *dev,
 132                                struct exynos_drm_ipp *ipp);
 133
 134 void exynos_drm_ipp_task_done(struct exynos_drm_ipp_task *task, int ret);
 135
 136 #ifdef CONFIG_DRM_EXYNOS_IPP
 137 int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev, void *data,
 138                                  struct drm_file *file_priv);
 139 int exynos_drm_ipp_get_caps_ioctl(struct drm_device *dev, void *data,
 140                                   struct drm_file *file_priv);
 141 int exynos_drm_ipp_get_limits_ioctl(struct drm_device *dev, void *data,
 142                                     struct drm_file *file_priv);
 143 int exynos_drm_ipp_commit_ioctl(struct drm_device *dev,
 144                                 void *data, struct drm_file *file_priv);
 145 #else
 146 static inline int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev,
 147          void *data, struct drm_file *file_priv)
 148 {
 149         struct drm_exynos_ioctl_ipp_get_res *resp = data;
 150
 151         resp->count_ipps = 0;
 152         return 0;
 153 }
 154 static inline int exynos_drm_ipp_get_caps_ioctl(struct drm_device *dev,
 155          void *data, struct drm_file *file_priv)
 156 {
 157         return -ENODEV;
 158 }
 159 static inline int exynos_drm_ipp_get_limits_ioctl(struct drm_device *dev,
 160          void *data, struct drm_file *file_priv)
 161 {
 162         return -ENODEV;
 163 }
 164 static inline int exynos_drm_ipp_commit_ioctl(struct drm_device *dev,
 165          void *data, struct drm_file *file_priv)
 166 {
 167         return -ENODEV;
 168 }
 169 #endif
 170 #endif