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         if (crtc->state->event && !crtc->state->active) {
  44                 spin_lock_irq(&crtc->dev->event_lock);
  45                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
  46                 spin_unlock_irq(&crtc->dev->event_lock);
  47
  48                 crtc->state->event = NULL;
  49         }
  50 }
  51
  52 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
  53                                      struct drm_crtc_state *state)
  54 {
  55         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  56
  57         if (!state->enable)
  58                 return 0;
  59
  60         if (exynos_crtc->ops->atomic_check)
  61                 return exynos_crtc->ops->atomic_check(exynos_crtc, state);
  62
  63         return 0;
  64 }
  65
  66 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  67                                      struct drm_crtc_state *old_crtc_state)
  68 {
  69         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  70
  71         if (exynos_crtc->ops->atomic_begin)
  72                 exynos_crtc->ops->atomic_begin(exynos_crtc);
  73 }
  74
  75 static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
  76                                      struct drm_crtc_state *old_crtc_state)
  77 {
  78         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  79
  80         if (exynos_crtc->ops->atomic_flush)
  81                 exynos_crtc->ops->atomic_flush(exynos_crtc);
  82 }
  83
  84 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
  85         .enable         = exynos_drm_crtc_enable,
  86         .disable        = exynos_drm_crtc_disable,
  87         .atomic_check   = exynos_crtc_atomic_check,
  88         .atomic_begin   = exynos_crtc_atomic_begin,
  89         .atomic_flush   = exynos_crtc_atomic_flush,
  90 };
  91
  92 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
  93 {
  94         struct drm_crtc *crtc = &exynos_crtc->base;
  95         struct drm_pending_vblank_event *event = crtc->state->event;
  96         unsigned long flags;
  97
  98         if (!event)
  99                 return;
 100         crtc->state->event = NULL;
 101
 102         WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 103
 104         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 105         drm_crtc_arm_vblank_event(crtc, event);
 106         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 107 }
 108
 109 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 110 {
 111         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 112
 113         drm_crtc_cleanup(crtc);
 114         kfree(exynos_crtc);
 115 }
 116
 117 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 118 {
 119         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 120
 121         if (exynos_crtc->ops->enable_vblank)
 122                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 123
 124         return 0;
 125 }
 126
 127 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 128 {
 129         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 130
 131         if (exynos_crtc->ops->disable_vblank)
 132                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 133 }
 134
 135 static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
 136 {
 137         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 138
 139         if (exynos_crtc->ops->get_vblank_counter)
 140                 return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
 141
 142         return 0;
 143 }
 144
 145 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 146         .set_config     = drm_atomic_helper_set_config,
 147         .page_flip      = drm_atomic_helper_page_flip,
 148         .destroy        = exynos_drm_crtc_destroy,
 149         .reset = drm_atomic_helper_crtc_reset,
 150         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 151         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 152         .enable_vblank = exynos_drm_crtc_enable_vblank,
 153         .disable_vblank = exynos_drm_crtc_disable_vblank,
 154         .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
 155 };
 156
 157 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 158                                         struct drm_plane *plane,
 159                                         enum exynos_drm_output_type type,
 160                                         const struct exynos_drm_crtc_ops *ops,
 161                                         void *ctx)
 162 {
 163         struct exynos_drm_crtc *exynos_crtc;
 164         struct drm_crtc *crtc;
 165         int ret;
 166
 167         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 168         if (!exynos_crtc)
 169                 return ERR_PTR(-ENOMEM);
 170
 171         exynos_crtc->type = type;
 172         exynos_crtc->ops = ops;
 173         exynos_crtc->ctx = ctx;
 174
 175         crtc = &exynos_crtc->base;
 176
 177         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 178                                         &exynos_crtc_funcs, NULL);
 179         if (ret < 0)
 180                 goto err_crtc;
 181
 182         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 183
 184         return exynos_crtc;
 185
 186 err_crtc:
 187         plane->funcs->destroy(plane);
 188         kfree(exynos_crtc);
 189         return ERR_PTR(ret);
 190 }
 191
 192 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 193                                        enum exynos_drm_output_type out_type)
 194 {
 195         struct drm_crtc *crtc;
 196
 197         drm_for_each_crtc(crtc, drm_dev)
 198                 if (to_exynos_crtc(crtc)->type == out_type)
 199                         return drm_crtc_index(crtc);
 200
 201         return -EPERM;
 202 }
 203
 204 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 205 {
 206         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 207
 208         if (exynos_crtc->ops->te_handler)
 209                 exynos_crtc->ops->te_handler(exynos_crtc);
 210 }