drivers/gpu/drm/exynos/exynos_drm_ipp.h

   1 /*
   2  * Copyright (c) 2017 Samsung Electronics Co., Ltd.
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #ifndef _EXYNOS_DRM_IPP_H_
  11 #define _EXYNOS_DRM_IPP_H_
  12
  13 #include <drm/drmP.h>
  14
  15 struct exynos_drm_ipp;
  16 struct exynos_drm_ipp_task;
  17
  18 /**
  19  * struct exynos_drm_ipp_funcs - exynos_drm_ipp control functions
  20  */
  21 struct exynos_drm_ipp_funcs {
  22         /**
  23          * @commit:
  24          *
  25          * This is the main entry point to start framebuffer processing
  26          * in the hardware. The exynos_drm_ipp_task has been already validated.
  27          * This function must not wait until the device finishes processing.
  28          * When the driver finishes processing, it has to call
  29          * exynos_exynos_drm_ipp_task_done() function.
  30          *
  31          * RETURNS:
  32          *
  33          * 0 on success or negative error codes in case of failure.
  34          */
  35         int (*commit)(struct exynos_drm_ipp *ipp,
  36                       struct exynos_drm_ipp_task *task);
  37
  38         /**
  39          * @abort:
  40          *
  41          * Informs the driver that it has to abort the currently running
  42          * task as soon as possible (i.e. as soon as it can stop the device
  43          * safely), even if the task would not have been finished by then.
  44          * After the driver performs the necessary steps, it has to call
  45          * exynos_drm_ipp_task_done() (as if the task ended normally).
  46          * This function does not have to (and will usually not) wait
  47          * until the device enters a state when it can be stopped.
  48          */
  49         void (*abort)(struct exynos_drm_ipp *ipp,
  50                       struct exynos_drm_ipp_task *task);
  51 };
  52
  53 /**
  54  * struct exynos_drm_ipp - central picture processor module structure
  55  */
  56 struct exynos_drm_ipp {
  57         struct drm_device *dev;
  58         struct list_head head;
  59         unsigned int id;
  60
  61         const char *name;
  62         const struct exynos_drm_ipp_funcs *funcs;
  63         unsigned int capabilities;
  64         const struct exynos_drm_ipp_formats *formats;
  65         unsigned int num_formats;
  66         atomic_t sequence;
  67
  68         spinlock_t lock;
  69         struct exynos_drm_ipp_task *task;
  70         struct list_head todo_list;
  71         wait_queue_head_t done_wq;
  72 };
  73
  74 struct exynos_drm_ipp_buffer {
  75         struct drm_exynos_ipp_task_buffer buf;
  76         struct drm_exynos_ipp_task_rect rect;
  77
  78         struct exynos_drm_gem *exynos_gem[MAX_FB_BUFFER];
  79         const struct drm_format_info *format;
  80         dma_addr_t dma_addr[MAX_FB_BUFFER];
  81 };
  82
  83 /**
  84  * struct exynos_drm_ipp_task - a structure describing transformation that
  85  * has to be performed by the picture processor hardware module
  86  */
  87 struct exynos_drm_ipp_task {
  88         struct drm_device *dev;
  89         struct exynos_drm_ipp *ipp;
  90         struct list_head head;
  91
  92         struct exynos_drm_ipp_buffer src;
  93         struct exynos_drm_ipp_buffer dst;
  94
  95         struct drm_exynos_ipp_task_transform transform;
  96         struct drm_exynos_ipp_task_alpha alpha;
  97
  98         struct work_struct cleanup_work;
  99         unsigned int flags;
 100         int ret;
 101
 102         struct drm_pending_exynos_ipp_event *event;
 103 };
 104
 105 #define DRM_EXYNOS_IPP_TASK_DONE        (1 << 0)
 106 #define DRM_EXYNOS_IPP_TASK_ASYNC       (1 << 1)
 107
 108 struct exynos_drm_ipp_formats {
 109         uint32_t fourcc;
 110         uint32_t type;
 111         uint64_t modifier;
 112         const struct drm_exynos_ipp_limit *limits;
 113         unsigned int num_limits;
 114 };
 115
 116 /* helper macros to set exynos_drm_ipp_formats structure and limits*/
 117 #define IPP_SRCDST_MFORMAT(f, m, l) \
 118         .fourcc = DRM_FORMAT_##f, .modifier = m, .limits = l, \
 119         .num_limits = ARRAY_SIZE(l), \
 120         .type = (DRM_EXYNOS_IPP_FORMAT_SOURCE | \
 121                  DRM_EXYNOS_IPP_FORMAT_DESTINATION)
 122
 123 #define IPP_SRCDST_FORMAT(f, l) IPP_SRCDST_MFORMAT(f, 0, l)
 124
 125 #define IPP_SIZE_LIMIT(l, val...)       \
 126         .type = (DRM_EXYNOS_IPP_LIMIT_TYPE_SIZE | \
 127                  DRM_EXYNOS_IPP_LIMIT_SIZE_##l), val
 128
 129 #define IPP_SCALE_LIMIT(val...)         \
 130         .type = (DRM_EXYNOS_IPP_LIMIT_TYPE_SCALE), val
 131
 132 int exynos_drm_ipp_register(struct drm_device *dev, struct exynos_drm_ipp *ipp,
 133                 const struct exynos_drm_ipp_funcs *funcs, unsigned int caps,
 134                 const struct exynos_drm_ipp_formats *formats,
 135                 unsigned int num_formats, const char *name);
 136 void exynos_drm_ipp_unregister(struct drm_device *dev,
 137                                struct exynos_drm_ipp *ipp);
 138
 139 void exynos_drm_ipp_task_done(struct exynos_drm_ipp_task *task, int ret);
 140
 141 #ifdef CONFIG_DRM_EXYNOS_IPP
 142 int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev, void *data,
 143                                  struct drm_file *file_priv);
 144 int exynos_drm_ipp_get_caps_ioctl(struct drm_device *dev, void *data,
 145                                   struct drm_file *file_priv);
 146 int exynos_drm_ipp_get_limits_ioctl(struct drm_device *dev, void *data,
 147                                     struct drm_file *file_priv);
 148 int exynos_drm_ipp_commit_ioctl(struct drm_device *dev,
 149                                 void *data, struct drm_file *file_priv);
 150 #else
 151 static inline int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev,
 152          void *data, struct drm_file *file_priv)
 153 {
 154         struct drm_exynos_ioctl_ipp_get_res *resp = data;
 155
 156         resp->count_ipps = 0;
 157         return 0;
 158 }
 159 static inline int exynos_drm_ipp_get_caps_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_get_limits_ioctl(struct drm_device *dev,
 165          void *data, struct drm_file *file_priv)
 166 {
 167         return -ENODEV;
 168 }
 169 static inline int exynos_drm_ipp_commit_ioctl(struct drm_device *dev,
 170          void *data, struct drm_file *file_priv)
 171 {
 172         return -ENODEV;
 173 }
 174 #endif
 175 #endif