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 #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         spin_lock_irq(&crtc->dev->event_lock);
  47         if (crtc->state->event && !crtc->state->active) {
  48                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
  49                 crtc->state->event = NULL;
  50         }
  51         spin_unlock_irq(&crtc->dev->event_lock);
  52 }
  53
  54 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
  55                                      struct drm_crtc_state *state)
  56 {
  57         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  58
  59         if (!state->enable)
  60                 return 0;
  61
  62         if (exynos_crtc->ops->atomic_check)
  63                 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
  64
  65         return 0;
  66 }
  67
  68 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  69                                      struct drm_crtc_state *old_crtc_state)
  70 {
  71         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  72
  73         if (exynos_crtc->ops->atomic_begin)
  74                 exynos_crtc->ops->atomic_begin(exynos_crtc);
  75 }
  76
  77 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  78                                      struct drm_crtc_state *old_crtc_state)
  79 {
  80         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  81
  82         if (exynos_crtc->ops->atomic_flush)
  83                 exynos_crtc->ops->atomic_flush(exynos_crtc);
  84 }
  85
  86 static enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
  87         const struct drm_display_mode *mode)
  88 {
  89         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  90
  91         if (exynos_crtc->ops->mode_valid)
  92                 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
  93
  94         return MODE_OK;
  95 }
  96
  97 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  98         .mode_valid     = exynos_crtc_mode_valid,
  99         .atomic_check   = exynos_crtc_atomic_check,
 100         .atomic_begin   = exynos_crtc_atomic_begin,
 101         .atomic_flush   = exynos_crtc_atomic_flush,
 102         .atomic_enable  = exynos_drm_crtc_atomic_enable,
 103         .atomic_disable = exynos_drm_crtc_atomic_disable,
 104 };
 105
 106 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
 107 {
 108         struct drm_crtc *crtc = &exynos_crtc->base;
 109         struct drm_pending_vblank_event *event = crtc->state->event;
 110         unsigned long flags;
 111
 112         if (!event)
 113                 return;
 114         crtc->state->event = NULL;
 115
 116         WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 117
 118         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 119         drm_crtc_arm_vblank_event(crtc, event);
 120         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 121 }
 122
 123 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 124 {
 125         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 126
 127         drm_crtc_cleanup(crtc);
 128         kfree(exynos_crtc);
 129 }
 130
 131 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 132 {
 133         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 134
 135         if (exynos_crtc->ops->enable_vblank)
 136                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 137
 138         return 0;
 139 }
 140
 141 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 142 {
 143         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 144
 145         if (exynos_crtc->ops->disable_vblank)
 146                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 147 }
 148
 149 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 150         .set_config     = drm_atomic_helper_set_config,
 151         .page_flip      = drm_atomic_helper_page_flip,
 152         .destroy        = exynos_drm_crtc_destroy,
 153         .reset = drm_atomic_helper_crtc_reset,
 154         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 155         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 156         .enable_vblank = exynos_drm_crtc_enable_vblank,
 157         .disable_vblank = exynos_drm_crtc_disable_vblank,
 158 };
 159
 160 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 161                                         struct drm_plane *plane,
 162                                         enum exynos_drm_output_type type,
 163                                         const struct exynos_drm_crtc_ops *ops,
 164                                         void *ctx)
 165 {
 166         struct exynos_drm_crtc *exynos_crtc;
 167         struct drm_crtc *crtc;
 168         int ret;
 169
 170         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 171         if (!exynos_crtc)
 172                 return ERR_PTR(-ENOMEM);
 173
 174         exynos_crtc->type = type;
 175         exynos_crtc->ops = ops;
 176         exynos_crtc->ctx = ctx;
 177
 178         crtc = &exynos_crtc->base;
 179
 180         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 181                                         &exynos_crtc_funcs, NULL);
 182         if (ret < 0)
 183                 goto err_crtc;
 184
 185         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 186
 187         return exynos_crtc;
 188
 189 err_crtc:
 190         plane->funcs->destroy(plane);
 191         kfree(exynos_crtc);
 192         return ERR_PTR(ret);
 193 }
 194
 195 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
 196                                        enum exynos_drm_output_type out_type)
 197 {
 198         struct drm_crtc *crtc;
 199
 200         drm_for_each_crtc(crtc, drm_dev)
 201                 if (to_exynos_crtc(crtc)->type == out_type)
 202                         return to_exynos_crtc(crtc);
 203
 204         return ERR_PTR(-EPERM);
 205 }
 206
 207 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
 208                 enum exynos_drm_output_type out_type)
 209 {
 210         struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
 211                                                 out_type);
 212
 213         if (IS_ERR(crtc))
 214                 return PTR_ERR(crtc);
 215
 216         encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
 217
 218         return 0;
 219 }
 220
 221 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 222 {
 223         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 224
 225         if (exynos_crtc->ops->te_handler)
 226                 exynos_crtc->ops->te_handler(exynos_crtc);
 227 }