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 <[email protected]>
   6  *      Joonyoung Shim <[email protected]>
   7  *      Seung-Woo Kim <[email protected]>
   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 #include <drm/drm_encoder.h>
  20
  21 #include "exynos_drm_crtc.h"
  22 #include "exynos_drm_drv.h"
  23 #include "exynos_drm_plane.h"
  24
  25 static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
  26                                           struct drm_crtc_state *old_state)
  27 {
  28         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  29
  30         if (exynos_crtc->ops->enable)
  31                 exynos_crtc->ops->enable(exynos_crtc);
  32
  33         drm_crtc_vblank_on(crtc);
  34 }
  35
  36 static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
  37                                            struct drm_crtc_state *old_state)
  38 {
  39         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  40
  41         drm_crtc_vblank_off(crtc);
  42
  43         if (exynos_crtc->ops->disable)
  44                 exynos_crtc->ops->disable(exynos_crtc);
  45
  46         if (crtc->state->event && !crtc->state->active) {
  47                 spin_lock_irq(&crtc->dev->event_lock);
  48                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
  49                 spin_unlock_irq(&crtc->dev->event_lock);
  50
  51                 crtc->state->event = NULL;
  52         }
  53 }
  54
  55 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
  56                                      struct drm_crtc_state *state)
  57 {
  58         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  59
  60         if (!state->enable)
  61                 return 0;
  62
  63         if (exynos_crtc->ops->atomic_check)
  64                 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
  65
  66         return 0;
  67 }
  68
  69 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  70                                      struct drm_crtc_state *old_crtc_state)
  71 {
  72         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  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 enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
  88         const struct drm_display_mode *mode)
  89 {
  90         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  91
  92         if (exynos_crtc->ops->mode_valid)
  93                 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
  94
  95         return MODE_OK;
  96 }
  97
  98 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
  99                 const struct drm_display_mode *mode,
 100                 struct drm_display_mode *adjusted_mode)
 101 {
 102         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 103
 104         if (exynos_crtc->ops->mode_fixup)
 105                 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
 106                                 adjusted_mode);
 107
 108         return true;
 109 }
 110
 111
 112 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 113         .mode_valid     = exynos_crtc_mode_valid,
 114         .mode_fixup     = exynos_crtc_mode_fixup,
 115         .atomic_check   = exynos_crtc_atomic_check,
 116         .atomic_begin   = exynos_crtc_atomic_begin,
 117         .atomic_flush   = exynos_crtc_atomic_flush,
 118         .atomic_enable  = exynos_drm_crtc_atomic_enable,
 119         .atomic_disable = exynos_drm_crtc_atomic_disable,
 120 };
 121
 122 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
 123 {
 124         struct drm_crtc *crtc = &exynos_crtc->base;
 125         struct drm_pending_vblank_event *event = crtc->state->event;
 126         unsigned long flags;
 127
 128         if (!event)
 129                 return;
 130         crtc->state->event = NULL;
 131
 132         WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 133
 134         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 135         drm_crtc_arm_vblank_event(crtc, event);
 136         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 137 }
 138
 139 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 140 {
 141         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 142
 143         drm_crtc_cleanup(crtc);
 144         kfree(exynos_crtc);
 145 }
 146
 147 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 148 {
 149         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 150
 151         if (exynos_crtc->ops->enable_vblank)
 152                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 153
 154         return 0;
 155 }
 156
 157 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 158 {
 159         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 160
 161         if (exynos_crtc->ops->disable_vblank)
 162                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 163 }
 164
 165 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
 166 {
 167         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 168
 169         if (exynos_crtc->ops->get_vblank_counter)
 170                 return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
 171
 172         return 0;
 173 }
 174
 175 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 176         .set_config     = drm_atomic_helper_set_config,
 177         .page_flip      = drm_atomic_helper_page_flip,
 178         .destroy        = exynos_drm_crtc_destroy,
 179         .reset = drm_atomic_helper_crtc_reset,
 180         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 181         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 182         .enable_vblank = exynos_drm_crtc_enable_vblank,
 183         .disable_vblank = exynos_drm_crtc_disable_vblank,
 184         .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
 185 };
 186
 187 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 188                                         struct drm_plane *plane,
 189                                         enum exynos_drm_output_type type,
 190                                         const struct exynos_drm_crtc_ops *ops,
 191                                         void *ctx)
 192 {
 193         struct exynos_drm_crtc *exynos_crtc;
 194         struct drm_crtc *crtc;
 195         int ret;
 196
 197         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 198         if (!exynos_crtc)
 199                 return ERR_PTR(-ENOMEM);
 200
 201         exynos_crtc->type = type;
 202         exynos_crtc->ops = ops;
 203         exynos_crtc->ctx = ctx;
 204
 205         crtc = &exynos_crtc->base;
 206
 207         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 208                                         &exynos_crtc_funcs, NULL);
 209         if (ret < 0)
 210                 goto err_crtc;
 211
 212         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 213
 214         return exynos_crtc;
 215
 216 err_crtc:
 217         plane->funcs->destroy(plane);
 218         kfree(exynos_crtc);
 219         return ERR_PTR(ret);
 220 }
 221
 222 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
 223                                        enum exynos_drm_output_type out_type)
 224 {
 225         struct drm_crtc *crtc;
 226
 227         drm_for_each_crtc(crtc, drm_dev)
 228                 if (to_exynos_crtc(crtc)->type == out_type)
 229                         return to_exynos_crtc(crtc);
 230
 231         return ERR_PTR(-EPERM);
 232 }
 233
 234 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
 235                 enum exynos_drm_output_type out_type)
 236 {
 237         struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
 238                                                 out_type);
 239
 240         if (IS_ERR(crtc))
 241                 return PTR_ERR(crtc);
 242
 243         encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
 244
 245         return 0;
 246 }
 247
 248 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 249 {
 250         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 251
 252         if (exynos_crtc->ops->te_handler)
 253                 exynos_crtc->ops->te_handler(exynos_crtc);
 254 }