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         exynos_crtc->event = crtc->state->event;
  73
  74         if (exynos_crtc->ops->atomic_begin)
  75                 exynos_crtc->ops->atomic_begin(exynos_crtc);
  76 }
  77
  78 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  79                                      struct drm_crtc_state *old_crtc_state)
  80 {
  81         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  82
  83         if (exynos_crtc->ops->atomic_flush)
  84                 exynos_crtc->ops->atomic_flush(exynos_crtc);
  85 }
  86
  87 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  88         .enable         = exynos_drm_crtc_enable,
  89         .disable        = exynos_drm_crtc_disable,
  90         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
  91         .atomic_check   = exynos_crtc_atomic_check,
  92         .atomic_begin   = exynos_crtc_atomic_begin,
  93         .atomic_flush   = exynos_crtc_atomic_flush,
  94 };
  95
  96 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
  97 {
  98         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  99         struct exynos_drm_private *private = crtc->dev->dev_private;
 100
 101         private->crtc[exynos_crtc->pipe] = NULL;
 102
 103         drm_crtc_cleanup(crtc);
 104         kfree(exynos_crtc);
 105 }
 106
 107 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 108         .set_config     = drm_atomic_helper_set_config,
 109         .page_flip      = drm_atomic_helper_page_flip,
 110         .destroy        = exynos_drm_crtc_destroy,
 111         .reset = drm_atomic_helper_crtc_reset,
 112         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 113         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 114 };
 115
 116 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 117                                         struct drm_plane *plane,
 118                                         int pipe,
 119                                         enum exynos_drm_output_type type,
 120                                         const struct exynos_drm_crtc_ops *ops,
 121                                         void *ctx)
 122 {
 123         struct exynos_drm_crtc *exynos_crtc;
 124         struct exynos_drm_private *private = drm_dev->dev_private;
 125         struct drm_crtc *crtc;
 126         int ret;
 127
 128         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 129         if (!exynos_crtc)
 130                 return ERR_PTR(-ENOMEM);
 131
 132         exynos_crtc->pipe = pipe;
 133         exynos_crtc->type = type;
 134         exynos_crtc->ops = ops;
 135         exynos_crtc->ctx = ctx;
 136
 137         init_waitqueue_head(&exynos_crtc->wait_update);
 138
 139         crtc = &exynos_crtc->base;
 140
 141         private->crtc[pipe] = crtc;
 142
 143         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 144                                         &exynos_crtc_funcs, NULL);
 145         if (ret < 0)
 146                 goto err_crtc;
 147
 148         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 149
 150         return exynos_crtc;
 151
 152 err_crtc:
 153         plane->funcs->destroy(plane);
 154         kfree(exynos_crtc);
 155         return ERR_PTR(ret);
 156 }
 157
 158 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 159 {
 160         struct exynos_drm_private *private = dev->dev_private;
 161         struct exynos_drm_crtc *exynos_crtc =
 162                 to_exynos_crtc(private->crtc[pipe]);
 163
 164         if (exynos_crtc->ops->enable_vblank)
 165                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 166
 167         return 0;
 168 }
 169
 170 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
 171 {
 172         struct exynos_drm_private *private = dev->dev_private;
 173         struct exynos_drm_crtc *exynos_crtc =
 174                 to_exynos_crtc(private->crtc[pipe]);
 175
 176         if (exynos_crtc->ops->disable_vblank)
 177                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 178 }
 179
 180 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
 181 {
 182         wait_event_timeout(exynos_crtc->wait_update,
 183                            (atomic_read(&exynos_crtc->pending_update) == 0),
 184                            msecs_to_jiffies(50));
 185 }
 186
 187 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 188                                 struct exynos_drm_plane *exynos_plane)
 189 {
 190         struct drm_crtc *crtc = &exynos_crtc->base;
 191         unsigned long flags;
 192
 193         exynos_plane->pending_fb = NULL;
 194
 195         if (atomic_dec_and_test(&exynos_crtc->pending_update))
 196                 wake_up(&exynos_crtc->wait_update);
 197
 198         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 199         if (exynos_crtc->event)
 200                 drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
 201
 202         exynos_crtc->event = NULL;
 203         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 204 }
 205
 206 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 207                                        enum exynos_drm_output_type out_type)
 208 {
 209         struct drm_crtc *crtc;
 210
 211         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 212                 struct exynos_drm_crtc *exynos_crtc;
 213
 214                 exynos_crtc = to_exynos_crtc(crtc);
 215                 if (exynos_crtc->type == out_type)
 216                         return exynos_crtc->pipe;
 217         }
 218
 219         return -EPERM;
 220 }
 221
 222 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 223 {
 224         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 225
 226         if (exynos_crtc->ops->te_handler)
 227                 exynos_crtc->ops->te_handler(exynos_crtc);
 228 }
 229
 230 void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc,
 231                                         struct drm_file *file)
 232 {
 233         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 234         struct drm_pending_vblank_event *e;
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 238         e = exynos_crtc->event;
 239         if (e && e->base.file_priv == file) {
 240                 exynos_crtc->event = NULL;
 241                 /*
 242                  * event will be destroyed by core part
 243                  * so below line should be removed later with core changes
 244                  */
 245                 e->base.destroy(&e->base);
 246                 /*
 247                  * event_space will be increased by core part
 248                  * so below line should be removed later with core changes.
 249                  */
 250                 file->event_space += sizeof(e->event);
 251                 atomic_dec(&exynos_crtc->pending_update);
 252         }
 253         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 254 }