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         struct drm_plane *plane;
  72
  73         exynos_crtc->event = crtc->state->event;
  74
  75         drm_atomic_crtc_for_each_plane(plane, crtc) {
  76                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  77
  78                 if (exynos_crtc->ops->atomic_begin)
  79                         exynos_crtc->ops->atomic_begin(exynos_crtc,
  80                                                         exynos_plane);
  81         }
  82 }
  83
  84 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  85                                      struct drm_crtc_state *old_crtc_state)
  86 {
  87         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  88         struct drm_plane *plane;
  89
  90         drm_atomic_crtc_for_each_plane(plane, crtc) {
  91                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  92
  93                 if (exynos_crtc->ops->atomic_flush)
  94                         exynos_crtc->ops->atomic_flush(exynos_crtc,
  95                                                         exynos_plane);
  96         }
  97 }
  98
  99 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 100         .enable         = exynos_drm_crtc_enable,
 101         .disable        = exynos_drm_crtc_disable,
 102         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
 103         .atomic_check   = exynos_crtc_atomic_check,
 104         .atomic_begin   = exynos_crtc_atomic_begin,
 105         .atomic_flush   = exynos_crtc_atomic_flush,
 106 };
 107
 108 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 109 {
 110         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 111         struct exynos_drm_private *private = crtc->dev->dev_private;
 112
 113         private->crtc[exynos_crtc->pipe] = NULL;
 114
 115         drm_crtc_cleanup(crtc);
 116         kfree(exynos_crtc);
 117 }
 118
 119 static struct drm_crtc_funcs exynos_crtc_funcs = {
 120         .set_config     = drm_atomic_helper_set_config,
 121         .page_flip      = drm_atomic_helper_page_flip,
 122         .destroy        = exynos_drm_crtc_destroy,
 123         .reset = drm_atomic_helper_crtc_reset,
 124         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 125         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 126 };
 127
 128 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 129                                         struct drm_plane *plane,
 130                                         int pipe,
 131                                         enum exynos_drm_output_type type,
 132                                         const struct exynos_drm_crtc_ops *ops,
 133                                         void *ctx)
 134 {
 135         struct exynos_drm_crtc *exynos_crtc;
 136         struct exynos_drm_private *private = drm_dev->dev_private;
 137         struct drm_crtc *crtc;
 138         int ret;
 139
 140         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 141         if (!exynos_crtc)
 142                 return ERR_PTR(-ENOMEM);
 143
 144         exynos_crtc->pipe = pipe;
 145         exynos_crtc->type = type;
 146         exynos_crtc->ops = ops;
 147         exynos_crtc->ctx = ctx;
 148
 149         init_waitqueue_head(&exynos_crtc->wait_update);
 150
 151         crtc = &exynos_crtc->base;
 152
 153         private->crtc[pipe] = crtc;
 154
 155         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 156                                         &exynos_crtc_funcs);
 157         if (ret < 0)
 158                 goto err_crtc;
 159
 160         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 161
 162         return exynos_crtc;
 163
 164 err_crtc:
 165         plane->funcs->destroy(plane);
 166         kfree(exynos_crtc);
 167         return ERR_PTR(ret);
 168 }
 169
 170 int exynos_drm_crtc_enable_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->enable_vblank)
 177                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 178
 179         return 0;
 180 }
 181
 182 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe)
 183 {
 184         struct exynos_drm_private *private = dev->dev_private;
 185         struct exynos_drm_crtc *exynos_crtc =
 186                 to_exynos_crtc(private->crtc[pipe]);
 187
 188         if (exynos_crtc->ops->disable_vblank)
 189                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 190 }
 191
 192 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
 193 {
 194         wait_event_timeout(exynos_crtc->wait_update,
 195                            (atomic_read(&exynos_crtc->pending_update) == 0),
 196                            msecs_to_jiffies(50));
 197 }
 198
 199 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 200                                 struct exynos_drm_plane *exynos_plane)
 201 {
 202         struct drm_crtc *crtc = &exynos_crtc->base;
 203         unsigned long flags;
 204
 205         exynos_plane->pending_fb = NULL;
 206
 207         if (atomic_dec_and_test(&exynos_crtc->pending_update))
 208                 wake_up(&exynos_crtc->wait_update);
 209
 210         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 211         if (exynos_crtc->event)
 212                 drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
 213
 214         exynos_crtc->event = NULL;
 215         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 216 }
 217
 218 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 219 {
 220         struct exynos_drm_crtc *exynos_crtc;
 221         struct drm_device *dev = fb->dev;
 222         struct drm_crtc *crtc;
 223
 224         /*
 225          * make sure that overlay data are updated to real hardware
 226          * for all encoders.
 227          */
 228         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 229                 exynos_crtc = to_exynos_crtc(crtc);
 230
 231                 /*
 232                  * wait for vblank interrupt
 233                  * - this makes sure that overlay data are updated to
 234                  *      real hardware.
 235                  */
 236                 if (exynos_crtc->ops->wait_for_vblank)
 237                         exynos_crtc->ops->wait_for_vblank(exynos_crtc);
 238         }
 239 }
 240
 241 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 242                                        enum exynos_drm_output_type out_type)
 243 {
 244         struct drm_crtc *crtc;
 245
 246         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 247                 struct exynos_drm_crtc *exynos_crtc;
 248
 249                 exynos_crtc = to_exynos_crtc(crtc);
 250                 if (exynos_crtc->type == out_type)
 251                         return exynos_crtc->pipe;
 252         }
 253
 254         return -EPERM;
 255 }
 256
 257 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 258 {
 259         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 260
 261         if (exynos_crtc->ops->te_handler)
 262                 exynos_crtc->ops->te_handler(exynos_crtc);
 263 }