drivers/gpu/drm/exynos/exynos_drm_crtc.c

   1 /* exynos_drm_crtc.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <drm/drmP.h>
  16 #include <drm/drm_crtc_helper.h>
  17 #include <drm/drm_atomic.h>
  18 #include <drm/drm_atomic_helper.h>
  19
  20 #include "exynos_drm_crtc.h"
  21 #include "exynos_drm_drv.h"
  22 #include "exynos_drm_plane.h"
  23
  24 static void exynos_drm_crtc_enable(struct drm_crtc *crtc)
  25 {
  26         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  27
  28         if (exynos_crtc->ops->enable)
  29                 exynos_crtc->ops->enable(exynos_crtc);
  30
  31         drm_crtc_vblank_on(crtc);
  32 }
  33
  34 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
  35 {
  36         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  37
  38         drm_crtc_vblank_off(crtc);
  39
  40         if (exynos_crtc->ops->disable)
  41                 exynos_crtc->ops->disable(exynos_crtc);
  42 }
  43
  44 static void
  45 exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
  46 {
  47         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  48
  49         if (exynos_crtc->ops->commit)
  50                 exynos_crtc->ops->commit(exynos_crtc);
  51 }
  52
  53 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
  54                                      struct drm_crtc_state *state)
  55 {
  56         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  57
  58         if (!state->enable)
  59                 return 0;
  60
  61         if (exynos_crtc->ops->atomic_check)
  62                 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
  63
  64         return 0;
  65 }
  66
  67 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  68                                      struct drm_crtc_state *old_crtc_state)
  69 {
  70         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  71
  72         if (exynos_crtc->ops->atomic_begin)
  73                 exynos_crtc->ops->atomic_begin(exynos_crtc);
  74 }
  75
  76 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  77                                      struct drm_crtc_state *old_crtc_state)
  78 {
  79         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  80         struct drm_pending_vblank_event *event;
  81         unsigned long flags;
  82
  83         if (exynos_crtc->ops->atomic_flush)
  84                 exynos_crtc->ops->atomic_flush(exynos_crtc);
  85
  86         event = crtc->state->event;
  87         if (event) {
  88                 crtc->state->event = NULL;
  89
  90                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
  91                 if (drm_crtc_vblank_get(crtc) == 0)
  92                         drm_crtc_arm_vblank_event(crtc, event);
  93                 else
  94                         drm_crtc_send_vblank_event(crtc, event);
  95                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
  96         }
  97
  98 }
  99
 100 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 101         .enable         = exynos_drm_crtc_enable,
 102         .disable        = exynos_drm_crtc_disable,
 103         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
 104         .atomic_check   = exynos_crtc_atomic_check,
 105         .atomic_begin   = exynos_crtc_atomic_begin,
 106         .atomic_flush   = exynos_crtc_atomic_flush,
 107 };
 108
 109 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 110 {
 111         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 112         struct exynos_drm_private *private = crtc->dev->dev_private;
 113
 114         private->crtc[exynos_crtc->pipe] = NULL;
 115
 116         drm_crtc_cleanup(crtc);
 117         kfree(exynos_crtc);
 118 }
 119
 120 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 121         .set_config     = drm_atomic_helper_set_config,
 122         .page_flip      = drm_atomic_helper_page_flip,
 123         .destroy        = exynos_drm_crtc_destroy,
 124         .reset = drm_atomic_helper_crtc_reset,
 125         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 126         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 127 };
 128
 129 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 130                                         struct drm_plane *plane,
 131                                         int pipe,
 132                                         enum exynos_drm_output_type type,
 133                                         const struct exynos_drm_crtc_ops *ops,
 134                                         void *ctx)
 135 {
 136         struct exynos_drm_crtc *exynos_crtc;
 137         struct exynos_drm_private *private = drm_dev->dev_private;
 138         struct drm_crtc *crtc;
 139         int ret;
 140
 141         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 142         if (!exynos_crtc)
 143                 return ERR_PTR(-ENOMEM);
 144
 145         exynos_crtc->pipe = pipe;
 146         exynos_crtc->type = type;
 147         exynos_crtc->ops = ops;
 148         exynos_crtc->ctx = ctx;
 149
 150         crtc = &exynos_crtc->base;
 151
 152         private->crtc[pipe] = crtc;
 153
 154         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 155                                         &exynos_crtc_funcs, NULL);
 156         if (ret < 0)
 157                 goto err_crtc;
 158
 159         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 160
 161         return exynos_crtc;
 162
 163 err_crtc:
 164         plane->funcs->destroy(plane);
 165         kfree(exynos_crtc);
 166         return ERR_PTR(ret);
 167 }
 168
 169 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 170 {
 171         struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
 172                                                                         pipe);
 173
 174         if (exynos_crtc->ops->enable_vblank)
 175                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 176
 177         return 0;
 178 }
 179
 180 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
 181 {
 182         struct exynos_drm_crtc *exynos_crtc = exynos_drm_crtc_from_pipe(dev,
 183                                                                         pipe);
 184
 185         if (exynos_crtc->ops->disable_vblank)
 186                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 187 }
 188
 189 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 190                                        enum exynos_drm_output_type out_type)
 191 {
 192         struct drm_crtc *crtc;
 193
 194         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 195                 struct exynos_drm_crtc *exynos_crtc;
 196
 197                 exynos_crtc = to_exynos_crtc(crtc);
 198                 if (exynos_crtc->type == out_type)
 199                         return exynos_crtc->pipe;
 200         }
 201
 202         return -EPERM;
 203 }
 204
 205 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 206 {
 207         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 208
 209         if (exynos_crtc->ops->te_handler)
 210                 exynos_crtc->ops->te_handler(exynos_crtc);
 211 }
 212
 213 void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc,
 214                                         struct drm_file *file)
 215 {
 216         struct drm_pending_vblank_event *e;
 217         unsigned long flags;
 218
 219         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 220
 221         e = crtc->state->event;
 222         if (e && e->base.file_priv == file)
 223                 crtc->state->event = NULL;
 224         else
 225                 e = NULL;
 226
 227         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 228
 229         if (e)
 230                 drm_event_cancel_free(crtc->dev, &e->base);
 231 }