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         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 const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  99         .mode_valid     = exynos_crtc_mode_valid,
 100         .atomic_check   = exynos_crtc_atomic_check,
 101         .atomic_begin   = exynos_crtc_atomic_begin,
 102         .atomic_flush   = exynos_crtc_atomic_flush,
 103         .atomic_enable  = exynos_drm_crtc_atomic_enable,
 104         .atomic_disable = exynos_drm_crtc_atomic_disable,
 105 };
 106
 107 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
 108 {
 109         struct drm_crtc *crtc = &exynos_crtc->base;
 110         struct drm_pending_vblank_event *event = crtc->state->event;
 111         unsigned long flags;
 112
 113         if (!event)
 114                 return;
 115         crtc->state->event = NULL;
 116
 117         WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 118
 119         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 120         drm_crtc_arm_vblank_event(crtc, event);
 121         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 122 }
 123
 124 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 125 {
 126         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 127
 128         drm_crtc_cleanup(crtc);
 129         kfree(exynos_crtc);
 130 }
 131
 132 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 133 {
 134         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 135
 136         if (exynos_crtc->ops->enable_vblank)
 137                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 138
 139         return 0;
 140 }
 141
 142 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 143 {
 144         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 145
 146         if (exynos_crtc->ops->disable_vblank)
 147                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 148 }
 149
 150 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 151         .set_config     = drm_atomic_helper_set_config,
 152         .page_flip      = drm_atomic_helper_page_flip,
 153         .destroy        = exynos_drm_crtc_destroy,
 154         .reset = drm_atomic_helper_crtc_reset,
 155         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 156         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 157         .enable_vblank = exynos_drm_crtc_enable_vblank,
 158         .disable_vblank = exynos_drm_crtc_disable_vblank,
 159 };
 160
 161 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 162                                         struct drm_plane *plane,
 163                                         enum exynos_drm_output_type type,
 164                                         const struct exynos_drm_crtc_ops *ops,
 165                                         void *ctx)
 166 {
 167         struct exynos_drm_crtc *exynos_crtc;
 168         struct drm_crtc *crtc;
 169         int ret;
 170
 171         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 172         if (!exynos_crtc)
 173                 return ERR_PTR(-ENOMEM);
 174
 175         exynos_crtc->type = type;
 176         exynos_crtc->ops = ops;
 177         exynos_crtc->ctx = ctx;
 178
 179         crtc = &exynos_crtc->base;
 180
 181         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 182                                         &exynos_crtc_funcs, NULL);
 183         if (ret < 0)
 184                 goto err_crtc;
 185
 186         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 187
 188         return exynos_crtc;
 189
 190 err_crtc:
 191         plane->funcs->destroy(plane);
 192         kfree(exynos_crtc);
 193         return ERR_PTR(ret);
 194 }
 195
 196 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
 197                                        enum exynos_drm_output_type out_type)
 198 {
 199         struct drm_crtc *crtc;
 200
 201         drm_for_each_crtc(crtc, drm_dev)
 202                 if (to_exynos_crtc(crtc)->type == out_type)
 203                         return to_exynos_crtc(crtc);
 204
 205         return ERR_PTR(-EPERM);
 206 }
 207
 208 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
 209                 enum exynos_drm_output_type out_type)
 210 {
 211         struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
 212                                                 out_type);
 213
 214         if (IS_ERR(crtc))
 215                 return PTR_ERR(crtc);
 216
 217         encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
 218
 219         return 0;
 220 }
 221
 222 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 223 {
 224         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 225
 226         if (exynos_crtc->ops->te_handler)
 227                 exynos_crtc->ops->te_handler(exynos_crtc);
 228 }