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_encoder.h"
  23 #include "exynos_drm_plane.h"
  24
  25 static void exynos_drm_crtc_enable(struct drm_crtc *crtc)
  26 {
  27         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  28
  29         if (exynos_crtc->enabled)
  30                 return;
  31
  32         if (exynos_crtc->ops->enable)
  33                 exynos_crtc->ops->enable(exynos_crtc);
  34
  35         exynos_crtc->enabled = true;
  36
  37         drm_crtc_vblank_on(crtc);
  38 }
  39
  40 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
  41 {
  42         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  43
  44         if (!exynos_crtc->enabled)
  45                 return;
  46
  47         /* wait for the completion of page flip. */
  48         if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
  49                                 (exynos_crtc->event == NULL), HZ/20))
  50                 exynos_crtc->event = NULL;
  51
  52         drm_crtc_vblank_off(crtc);
  53
  54         if (exynos_crtc->ops->disable)
  55                 exynos_crtc->ops->disable(exynos_crtc);
  56
  57         exynos_crtc->enabled = false;
  58 }
  59
  60 static bool
  61 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
  62                             const struct drm_display_mode *mode,
  63                             struct drm_display_mode *adjusted_mode)
  64 {
  65         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  66
  67         if (exynos_crtc->ops->mode_fixup)
  68                 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
  69                                                     adjusted_mode);
  70
  71         return true;
  72 }
  73
  74 static void
  75 exynos_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
  76 {
  77         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  78
  79         if (exynos_crtc->ops->commit)
  80                 exynos_crtc->ops->commit(exynos_crtc);
  81 }
  82
  83 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc)
  84 {
  85         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  86
  87         if (crtc->state->event) {
  88                 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
  89                 exynos_crtc->event = crtc->state->event;
  90         }
  91 }
  92
  93 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc)
  94 {
  95 }
  96
  97 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  98         .enable         = exynos_drm_crtc_enable,
  99         .disable        = exynos_drm_crtc_disable,
 100         .mode_fixup     = exynos_drm_crtc_mode_fixup,
 101         .mode_set_nofb  = exynos_drm_crtc_mode_set_nofb,
 102         .atomic_begin   = exynos_crtc_atomic_begin,
 103         .atomic_flush   = exynos_crtc_atomic_flush,
 104 };
 105
 106 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 107 {
 108         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 109         struct exynos_drm_private *private = crtc->dev->dev_private;
 110
 111         private->crtc[exynos_crtc->pipe] = NULL;
 112
 113         drm_crtc_cleanup(crtc);
 114         kfree(exynos_crtc);
 115 }
 116
 117 static struct drm_crtc_funcs exynos_crtc_funcs = {
 118         .set_config     = drm_atomic_helper_set_config,
 119         .page_flip      = drm_atomic_helper_page_flip,
 120         .destroy        = exynos_drm_crtc_destroy,
 121         .reset = drm_atomic_helper_crtc_reset,
 122         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 123         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 124 };
 125
 126 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 127                                         struct drm_plane *plane,
 128                                         int pipe,
 129                                         enum exynos_drm_output_type type,
 130                                         const struct exynos_drm_crtc_ops *ops,
 131                                         void *ctx)
 132 {
 133         struct exynos_drm_crtc *exynos_crtc;
 134         struct exynos_drm_private *private = drm_dev->dev_private;
 135         struct drm_crtc *crtc;
 136         int ret;
 137
 138         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 139         if (!exynos_crtc)
 140                 return ERR_PTR(-ENOMEM);
 141
 142         init_waitqueue_head(&exynos_crtc->pending_flip_queue);
 143
 144         exynos_crtc->pipe = pipe;
 145         exynos_crtc->type = type;
 146         exynos_crtc->ops = ops;
 147         exynos_crtc->ctx = ctx;
 148
 149         crtc = &exynos_crtc->base;
 150
 151         private->crtc[pipe] = crtc;
 152
 153         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 154                                         &exynos_crtc_funcs);
 155         if (ret < 0)
 156                 goto err_crtc;
 157
 158         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 159
 160         return exynos_crtc;
 161
 162 err_crtc:
 163         plane->funcs->destroy(plane);
 164         kfree(exynos_crtc);
 165         return ERR_PTR(ret);
 166 }
 167
 168 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
 169 {
 170         struct exynos_drm_private *private = dev->dev_private;
 171         struct exynos_drm_crtc *exynos_crtc =
 172                 to_exynos_crtc(private->crtc[pipe]);
 173
 174         if (!exynos_crtc->enabled)
 175                 return -EPERM;
 176
 177         if (exynos_crtc->ops->enable_vblank)
 178                 exynos_crtc->ops->enable_vblank(exynos_crtc);
 179
 180         return 0;
 181 }
 182
 183 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 184 {
 185         struct exynos_drm_private *private = dev->dev_private;
 186         struct exynos_drm_crtc *exynos_crtc =
 187                 to_exynos_crtc(private->crtc[pipe]);
 188
 189         if (!exynos_crtc->enabled)
 190                 return;
 191
 192         if (exynos_crtc->ops->disable_vblank)
 193                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 194 }
 195
 196 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe)
 197 {
 198         struct exynos_drm_private *dev_priv = dev->dev_private;
 199         struct drm_crtc *drm_crtc = dev_priv->crtc[pipe];
 200         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&dev->event_lock, flags);
 204         if (exynos_crtc->event) {
 205
 206                 drm_send_vblank_event(dev, -1, exynos_crtc->event);
 207                 drm_vblank_put(dev, pipe);
 208                 wake_up(&exynos_crtc->pending_flip_queue);
 209
 210         }
 211
 212         exynos_crtc->event = NULL;
 213         spin_unlock_irqrestore(&dev->event_lock, flags);
 214 }
 215
 216 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 217 {
 218         struct exynos_drm_crtc *exynos_crtc;
 219         struct drm_device *dev = fb->dev;
 220         struct drm_crtc *crtc;
 221
 222         /*
 223          * make sure that overlay data are updated to real hardware
 224          * for all encoders.
 225          */
 226         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 227                 exynos_crtc = to_exynos_crtc(crtc);
 228
 229                 /*
 230                  * wait for vblank interrupt
 231                  * - this makes sure that overlay data are updated to
 232                  *      real hardware.
 233                  */
 234                 if (exynos_crtc->ops->wait_for_vblank)
 235                         exynos_crtc->ops->wait_for_vblank(exynos_crtc);
 236         }
 237 }
 238
 239 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 240                                         unsigned int out_type)
 241 {
 242         struct drm_crtc *crtc;
 243
 244         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 245                 struct exynos_drm_crtc *exynos_crtc;
 246
 247                 exynos_crtc = to_exynos_crtc(crtc);
 248                 if (exynos_crtc->type == out_type)
 249                         return exynos_crtc->pipe;
 250         }
 251
 252         return -EPERM;
 253 }
 254
 255 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 256 {
 257         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 258
 259         if (exynos_crtc->ops->te_handler)
 260                 exynos_crtc->ops->te_handler(exynos_crtc);
 261 }