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