drivers/gpu/drm/exynos/exynos_drm_crtc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* exynos_drm_crtc.c
   3  *
   4  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   5  * Authors:
   6  *      Inki Dae <inki.dae@samsung.com>
   7  *      Joonyoung Shim <jy0922.shim@samsung.com>
   8  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   9  */
  10
  11 #include <drm/drm_atomic.h>
  12 #include <drm/drm_atomic_helper.h>
  13 #include <drm/drm_encoder.h>
  14 #include <drm/drm_probe_helper.h>
  15 #include <drm/drm_vblank.h>
  16
  17 #include "exynos_drm_crtc.h"
  18 #include "exynos_drm_drv.h"
  19 #include "exynos_drm_plane.h"
  20
  21 static void exynos_drm_crtc_atomic_enable(struct drm_crtc *crtc,
  22                                           struct drm_atomic_state *state)
  23 {
  24         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  25
  26         if (exynos_crtc->ops->atomic_enable)
  27                 exynos_crtc->ops->atomic_enable(exynos_crtc);
  28
  29         drm_crtc_vblank_on(crtc);
  30 }
  31
  32 static void exynos_drm_crtc_atomic_disable(struct drm_crtc *crtc,
  33                                            struct drm_atomic_state *state)
  34 {
  35         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  36
  37         drm_crtc_vblank_off(crtc);
  38
  39         if (exynos_crtc->ops->atomic_disable)
  40                 exynos_crtc->ops->atomic_disable(exynos_crtc);
  41
  42         spin_lock_irq(&crtc->dev->event_lock);
  43         if (crtc->state->event && !crtc->state->active) {
  44                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
  45                 crtc->state->event = NULL;
  46         }
  47         spin_unlock_irq(&crtc->dev->event_lock);
  48 }
  49
  50 static int exynos_crtc_atomic_check(struct drm_crtc *crtc,
  51                                      struct drm_atomic_state *state)
  52 {
  53         struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
  54                                                                           crtc);
  55         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  56
  57         if (!crtc_state->enable)
  58                 return 0;
  59
  60         if (exynos_crtc->ops->atomic_check)
  61                 return exynos_crtc->ops->atomic_check(exynos_crtc, crtc_state);
  62
  63         return 0;
  64 }
  65
  66 static void exynos_crtc_atomic_begin(struct drm_crtc *crtc,
  67                                      struct drm_atomic_state *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_atomic_state *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 enum drm_mode_status exynos_crtc_mode_valid(struct drm_crtc *crtc,
  85         const struct drm_display_mode *mode)
  86 {
  87         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  88
  89         if (exynos_crtc->ops->mode_valid)
  90                 return exynos_crtc->ops->mode_valid(exynos_crtc, mode);
  91
  92         return MODE_OK;
  93 }
  94
  95 static bool exynos_crtc_mode_fixup(struct drm_crtc *crtc,
  96                 const struct drm_display_mode *mode,
  97                 struct drm_display_mode *adjusted_mode)
  98 {
  99         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 100
 101         if (exynos_crtc->ops->mode_fixup)
 102                 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
 103                                 adjusted_mode);
 104
 105         return true;
 106 }
 107
 108
 109 static const struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 110         .mode_valid     = exynos_crtc_mode_valid,
 111         .mode_fixup     = exynos_crtc_mode_fixup,
 112         .atomic_check   = exynos_crtc_atomic_check,
 113         .atomic_begin   = exynos_crtc_atomic_begin,
 114         .atomic_flush   = exynos_crtc_atomic_flush,
 115         .atomic_enable  = exynos_drm_crtc_atomic_enable,
 116         .atomic_disable = exynos_drm_crtc_atomic_disable,
 117 };
 118
 119 void exynos_crtc_handle_event(struct exynos_drm_crtc *exynos_crtc)
 120 {
 121         struct drm_crtc *crtc = &exynos_crtc->base;
 122         struct drm_pending_vblank_event *event = crtc->state->event;
 123         unsigned long flags;
 124
 125         if (!event)
 126                 return;
 127         crtc->state->event = NULL;
 128
 129         WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 130
 131         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 132         drm_crtc_arm_vblank_event(crtc, event);
 133         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 134 }
 135
 136 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 137 {
 138         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 139
 140         drm_crtc_cleanup(crtc);
 141         kfree(exynos_crtc);
 142 }
 143
 144 static int exynos_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 145 {
 146         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 147
 148         if (exynos_crtc->ops->enable_vblank)
 149                 return exynos_crtc->ops->enable_vblank(exynos_crtc);
 150
 151         return 0;
 152 }
 153
 154 static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 155 {
 156         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 157
 158         if (exynos_crtc->ops->disable_vblank)
 159                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 160 }
 161
 162 static const struct drm_crtc_funcs exynos_crtc_funcs = {
 163         .set_config     = drm_atomic_helper_set_config,
 164         .page_flip      = drm_atomic_helper_page_flip,
 165         .destroy        = exynos_drm_crtc_destroy,
 166         .reset = drm_atomic_helper_crtc_reset,
 167         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 168         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 169         .enable_vblank = exynos_drm_crtc_enable_vblank,
 170         .disable_vblank = exynos_drm_crtc_disable_vblank,
 171 };
 172
 173 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 174                                         struct drm_plane *plane,
 175                                         enum exynos_drm_output_type type,
 176                                         const struct exynos_drm_crtc_ops *ops,
 177                                         void *ctx)
 178 {
 179         struct exynos_drm_crtc *exynos_crtc;
 180         struct drm_crtc *crtc;
 181         int ret;
 182
 183         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 184         if (!exynos_crtc)
 185                 return ERR_PTR(-ENOMEM);
 186
 187         exynos_crtc->type = type;
 188         exynos_crtc->ops = ops;
 189         exynos_crtc->ctx = ctx;
 190
 191         crtc = &exynos_crtc->base;
 192
 193         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 194                                         &exynos_crtc_funcs, NULL);
 195         if (ret < 0)
 196                 goto err_crtc;
 197
 198         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 199
 200         return exynos_crtc;
 201
 202 err_crtc:
 203         plane->funcs->destroy(plane);
 204         kfree(exynos_crtc);
 205         return ERR_PTR(ret);
 206 }
 207
 208 struct exynos_drm_crtc *exynos_drm_crtc_get_by_type(struct drm_device *drm_dev,
 209                                        enum exynos_drm_output_type out_type)
 210 {
 211         struct drm_crtc *crtc;
 212
 213         drm_for_each_crtc(crtc, drm_dev)
 214                 if (to_exynos_crtc(crtc)->type == out_type)
 215                         return to_exynos_crtc(crtc);
 216
 217         return ERR_PTR(-ENODEV);
 218 }
 219
 220 int exynos_drm_set_possible_crtcs(struct drm_encoder *encoder,
 221                 enum exynos_drm_output_type out_type)
 222 {
 223         struct exynos_drm_crtc *crtc = exynos_drm_crtc_get_by_type(encoder->dev,
 224                                                 out_type);
 225
 226         if (IS_ERR(crtc))
 227                 return PTR_ERR(crtc);
 228
 229         encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
 230
 231         return 0;
 232 }
 233
 234 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 235 {
 236         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 237
 238         if (exynos_crtc->ops->te_handler)
 239                 exynos_crtc->ops->te_handler(exynos_crtc);
 240 }