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 void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  54                                      struct drm_crtc_state *old_crtc_state)
  55 {
  56         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  57         struct drm_plane *plane;
  58
  59         exynos_crtc->event = crtc->state->event;
  60
  61         drm_atomic_crtc_for_each_plane(plane, crtc) {
  62                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  63
  64                 if (exynos_crtc->ops->atomic_begin)
  65                         exynos_crtc->ops->atomic_begin(exynos_crtc,
  66                                                         exynos_plane);
  67         }
  68 }
  69
  70 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  71                                      struct drm_crtc_state *old_crtc_state)
  72 {
  73         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  74         struct drm_plane *plane;
  75
  76         drm_atomic_crtc_for_each_plane(plane, crtc) {
  77                 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  78
  79                 if (exynos_crtc->ops->atomic_flush)
  80                         exynos_crtc->ops->atomic_flush(exynos_crtc,
  81                                                         exynos_plane);
  82         }
  83 }
  84
  85 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  86         .enable         = exynos_drm_crtc_enable,
  87         .disable        = exynos_drm_crtc_disable,
  88         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
  89         .atomic_begin   = exynos_crtc_atomic_begin,
  90         .atomic_flush   = exynos_crtc_atomic_flush,
  91 };
  92
  93 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
  94 {
  95         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  96         struct exynos_drm_private *private = crtc->dev->dev_private;
  97
  98         private->crtc[exynos_crtc->pipe] = NULL;
  99
 100         drm_crtc_cleanup(crtc);
 101         kfree(exynos_crtc);
 102 }
 103
 104 static struct drm_crtc_funcs exynos_crtc_funcs = {
 105         .set_config     = drm_atomic_helper_set_config,
 106         .page_flip      = drm_atomic_helper_page_flip,
 107         .destroy        = exynos_drm_crtc_destroy,
 108         .reset = drm_atomic_helper_crtc_reset,
 109         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 110         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 111 };
 112
 113 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 114                                         struct drm_plane *plane,
 115                                         int pipe,
 116                                         enum exynos_drm_output_type type,
 117                                         const struct exynos_drm_crtc_ops *ops,
 118                                         void *ctx)
 119 {
 120         struct exynos_drm_crtc *exynos_crtc;
 121         struct exynos_drm_private *private = drm_dev->dev_private;
 122         struct drm_crtc *crtc;
 123         int ret;
 124
 125         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 126         if (!exynos_crtc)
 127                 return ERR_PTR(-ENOMEM);
 128
 129         exynos_crtc->pipe = pipe;
 130         exynos_crtc->type = type;
 131         exynos_crtc->ops = ops;
 132         exynos_crtc->ctx = ctx;
 133
 134         init_waitqueue_head(&exynos_crtc->wait_update);
 135
 136         crtc = &exynos_crtc->base;
 137
 138         private->crtc[pipe] = crtc;
 139
 140         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 141                                         &exynos_crtc_funcs);
 142         if (ret < 0)
 143                 goto err_crtc;
 144
 145         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 146
 147         return exynos_crtc;
 148
 149 err_crtc:
 150         plane->funcs->destroy(plane);
 151         kfree(exynos_crtc);
 152         return ERR_PTR(ret);
 153 }
 154
 155 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
 156 {
 157         struct exynos_drm_private *private = dev->dev_private;
 158         struct exynos_drm_crtc *exynos_crtc =
 159                 to_exynos_crtc(private->crtc[pipe]);
 160
 161         if (exynos_crtc->ops->enable_vblank)
 162                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 163
 164         return 0;
 165 }
 166
 167 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, 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->disable_vblank)
 174                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 175 }
 176
 177 void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc)
 178 {
 179         wait_event_timeout(exynos_crtc->wait_update,
 180                            (atomic_read(&exynos_crtc->pending_update) == 0),
 181                            msecs_to_jiffies(50));
 182 }
 183
 184 void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
 185                                 struct exynos_drm_plane *exynos_plane)
 186 {
 187         struct drm_crtc *crtc = &exynos_crtc->base;
 188         unsigned long flags;
 189
 190         exynos_plane->pending_fb = NULL;
 191
 192         if (atomic_dec_and_test(&exynos_crtc->pending_update))
 193                 wake_up(&exynos_crtc->wait_update);
 194
 195         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 196         if (exynos_crtc->event)
 197                 drm_crtc_send_vblank_event(crtc, exynos_crtc->event);
 198
 199         exynos_crtc->event = NULL;
 200         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 201 }
 202
 203 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 204 {
 205         struct exynos_drm_crtc *exynos_crtc;
 206         struct drm_device *dev = fb->dev;
 207         struct drm_crtc *crtc;
 208
 209         /*
 210          * make sure that overlay data are updated to real hardware
 211          * for all encoders.
 212          */
 213         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 214                 exynos_crtc = to_exynos_crtc(crtc);
 215
 216                 /*
 217                  * wait for vblank interrupt
 218                  * - this makes sure that overlay data are updated to
 219                  *      real hardware.
 220                  */
 221                 if (exynos_crtc->ops->wait_for_vblank)
 222                         exynos_crtc->ops->wait_for_vblank(exynos_crtc);
 223         }
 224 }
 225
 226 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 227                                        enum exynos_drm_output_type out_type)
 228 {
 229         struct drm_crtc *crtc;
 230
 231         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 232                 struct exynos_drm_crtc *exynos_crtc;
 233
 234                 exynos_crtc = to_exynos_crtc(crtc);
 235                 if (exynos_crtc->type == out_type)
 236                         return exynos_crtc->pipe;
 237         }
 238
 239         return -EPERM;
 240 }
 241
 242 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 243 {
 244         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 245
 246         if (exynos_crtc->ops->te_handler)
 247                 exynos_crtc->ops->te_handler(exynos_crtc);
 248 }