drivers/gpu/drm/msm/msm_atomic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2014 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  */
   6
   7 #include <drm/drm_atomic_uapi.h>
   8
   9 #include "msm_drv.h"
  10 #include "msm_gem.h"
  11 #include "msm_kms.h"
  12
  13 static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
  14                 struct drm_atomic_state *old_state)
  15 {
  16         struct drm_crtc *crtc;
  17         struct drm_crtc_state *new_crtc_state;
  18         struct msm_drm_private *priv = old_state->dev->dev_private;
  19         struct msm_kms *kms = priv->kms;
  20         int i;
  21
  22         for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
  23                 if (!new_crtc_state->active)
  24                         continue;
  25
  26                 if (drm_crtc_vblank_get(crtc))
  27                         continue;
  28
  29                 kms->funcs->wait_for_crtc_commit_done(kms, crtc);
  30
  31                 drm_crtc_vblank_put(crtc);
  32         }
  33 }
  34
  35 int msm_atomic_prepare_fb(struct drm_plane *plane,
  36                           struct drm_plane_state *new_state)
  37 {
  38         struct msm_drm_private *priv = plane->dev->dev_private;
  39         struct msm_kms *kms = priv->kms;
  40         struct drm_gem_object *obj;
  41         struct dma_fence *fence;
  42
  43         if (!new_state->fb)
  44                 return 0;
  45
  46         obj = msm_framebuffer_bo(new_state->fb, 0);
  47         fence = reservation_object_get_excl_rcu(obj->resv);
  48
  49         drm_atomic_set_fence_for_plane(new_state, fence);
  50
  51         return msm_framebuffer_prepare(new_state->fb, kms->aspace);
  52 }
  53
  54 void msm_atomic_commit_tail(struct drm_atomic_state *state)
  55 {
  56         struct drm_device *dev = state->dev;
  57         struct msm_drm_private *priv = dev->dev_private;
  58         struct msm_kms *kms = priv->kms;
  59
  60         kms->funcs->prepare_commit(kms, state);
  61
  62         drm_atomic_helper_commit_modeset_disables(dev, state);
  63
  64         drm_atomic_helper_commit_planes(dev, state, 0);
  65
  66         drm_atomic_helper_commit_modeset_enables(dev, state);
  67
  68         if (kms->funcs->commit) {
  69                 DRM_DEBUG_ATOMIC("triggering commit\n");
  70                 kms->funcs->commit(kms, state);
  71         }
  72
  73         if (!state->legacy_cursor_update)
  74                 msm_atomic_wait_for_commit_done(dev, state);
  75
  76         kms->funcs->complete_commit(kms, state);
  77
  78         drm_atomic_helper_commit_hw_done(state);
  79
  80         drm_atomic_helper_cleanup_planes(dev, state);
  81 }