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 (exynos_crtc->ops->atomic_check)
  59                 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
  60
  61         return 0;
  62 }
  63
  64 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  65                                      struct drm_crtc_state *old_crtc_state)
  66 {
  67         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  68         struct drm_plane *plane;
  69
  70         exynos_crtc->event = crtc->state->event;
  71
  72         drm_atomic_crtc_for_each_plane(plane, crtc) {
  73                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  74
  75                 if (exynos_crtc->ops->atomic_begin)
  76                         exynos_crtc->ops->atomic_begin(exynos_crtc,
  77                                                         exynos_plane);
  78         }
  79 }
  80
  81 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  82                                      struct drm_crtc_state *old_crtc_state)
  83 {
  84         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  85         struct drm_plane *plane;
  86
  87         drm_atomic_crtc_for_each_plane(plane, crtc) {
  88                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  89
  90                 if (exynos_crtc->ops->atomic_flush)
  91                         exynos_crtc->ops->atomic_flush(exynos_crtc,
  92                                                         exynos_plane);
  93         }
  94 }
  95
  96 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  97         .enable         = exynos_drm_crtc_enable,
  98         .disable        = exynos_drm_crtc_disable,
  99         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
 100         .atomic_check   = exynos_crtc_atomic_check,
 101         .atomic_begin   = exynos_crtc_atomic_begin,
 102         .atomic_flush   = exynos_crtc_atomic_flush,
 103 };
 104
 105 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 106 {
 107         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 108         struct exynos_drm_private *private = crtc->dev->dev_private;
 109
 110         private->crtc[exynos_crtc->pipe] = NULL;
 111
 112         drm_crtc_cleanup(crtc);
 113         kfree(exynos_crtc);
 114 }
 115
 116 static struct drm_crtc_funcs exynos_crtc_funcs = {
 117         .set_config     = drm_atomic_helper_set_config,
 118         .page_flip      = drm_atomic_helper_page_flip,
 119         .destroy        = exynos_drm_crtc_destroy,
 120         .reset = drm_atomic_helper_crtc_reset,
 121         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 122         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 123 };
 124
 125 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 126                                         struct drm_plane *plane,
 127                                         int pipe,
 128                                         enum exynos_drm_output_type type,
 129                                         const struct exynos_drm_crtc_ops *ops,
 130                                         void *ctx)
 131 {
 132         struct exynos_drm_crtc *exynos_crtc;
 133         struct exynos_drm_private *private = drm_dev->dev_private;
 134         struct drm_crtc *crtc;
 135         int ret;
 136
 137         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 138         if (!exynos_crtc)
 139                 return ERR_PTR(-ENOMEM);
 140
 141         exynos_crtc->pipe = pipe;
 142         exynos_crtc->type = type;
 143         exynos_crtc->ops = ops;
 144         exynos_crtc->ctx = ctx;
 145
 146         init_waitqueue_head(&exynos_crtc->wait_update);
 147
 148         crtc = &exynos_crtc->base;
 149
 150         private->crtc[pipe] = crtc;
 151
 152         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 153                                         &exynos_crtc_funcs);
 154         if (ret < 0)
 155                 goto err_crtc;
 156
 157         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 158
 159         return exynos_crtc;
 160
 161 err_crtc:
 162         plane->funcs->destroy(plane);
 163         kfree(exynos_crtc);
 164         return ERR_PTR(ret);
 165 }
 166
 167 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
 168 {
 169         struct exynos_drm_private *private = dev->dev_private;
 170         struct exynos_drm_crtc *exynos_crtc =
 171                 to_exynos_crtc(private->crtc[pipe]);
 172
 173         if (exynos_crtc->ops->enable_vblank)
 174                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 175
 176         return 0;
 177 }
 178
 179 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
 180 {
 181         struct exynos_drm_private *private = dev->dev_private;
 182         struct exynos_drm_crtc *exynos_crtc =
 183                 to_exynos_crtc(private->crtc[pipe]);
 184
 185         if (exynos_crtc->ops->disable_vblank)
 186                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 187 }
 188
 189 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
 190 {
 191         wait_event_timeout(exynos_crtc->wait_update,
 192                            (atomic_read(&exynos_crtc->pending_update) == 0),
 193                            msecs_to_jiffies(50));
 194 }
 195
 196 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 197                                 struct exynos_drm_plane *exynos_plane)
 198 {
 199         struct drm_crtc *crtc = &exynos_crtc->base;
 200         unsigned long flags;
 201
 202         exynos_plane->pending_fb = NULL;
 203
 204         if (atomic_dec_and_test(&exynos_crtc->pending_update))
 205                 wake_up(&exynos_crtc->wait_update);
 206
 207         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 208         if (exynos_crtc->event)
 209                 drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
 210
 211         exynos_crtc->event = NULL;
 212         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 213 }
 214
 215 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 216 {
 217         struct exynos_drm_crtc *exynos_crtc;
 218         struct drm_device *dev = fb->dev;
 219         struct drm_crtc *crtc;
 220
 221         /*
 222          * make sure that overlay data are updated to real hardware
 223          * for all encoders.
 224          */
 225         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 226                 exynos_crtc = to_exynos_crtc(crtc);
 227
 228                 /*
 229                  * wait for vblank interrupt
 230                  * - this makes sure that overlay data are updated to
 231                  *      real hardware.
 232                  */
 233                 if (exynos_crtc->ops->wait_for_vblank)
 234                         exynos_crtc->ops->wait_for_vblank(exynos_crtc);
 235         }
 236 }
 237
 238 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 239                                        enum exynos_drm_output_type out_type)
 240 {
 241         struct drm_crtc *crtc;
 242
 243         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 244                 struct exynos_drm_crtc *exynos_crtc;
 245
 246                 exynos_crtc = to_exynos_crtc(crtc);
 247                 if (exynos_crtc->type == out_type)
 248                         return exynos_crtc->pipe;
 249         }
 250
 251         return -EPERM;
 252 }
 253
 254 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 255 {
 256         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 257
 258         if (exynos_crtc->ops->te_handler)
 259                 exynos_crtc->ops->te_handler(exynos_crtc);
 260 }