drivers/gpu/drm/msm/msm_atomic.c

   1 /*
   2  * Copyright (C) 2014 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <drm/drm_atomic_uapi.h>
  19
  20 #include "msm_drv.h"
  21 #include "msm_gem.h"
  22 #include "msm_kms.h"
  23
  24 static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
  25                 struct drm_atomic_state *old_state)
  26 {
  27         struct drm_crtc *crtc;
  28         struct drm_crtc_state *new_crtc_state;
  29         struct msm_drm_private *priv = old_state->dev->dev_private;
  30         struct msm_kms *kms = priv->kms;
  31         int i;
  32
  33         for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
  34                 if (!new_crtc_state->active)
  35                         continue;
  36
  37                 if (drm_crtc_vblank_get(crtc))
  38                         continue;
  39
  40                 kms->funcs->wait_for_crtc_commit_done(kms, crtc);
  41
  42                 drm_crtc_vblank_put(crtc);
  43         }
  44 }
  45
  46 int msm_atomic_prepare_fb(struct drm_plane *plane,
  47                           struct drm_plane_state *new_state)
  48 {
  49         struct msm_drm_private *priv = plane->dev->dev_private;
  50         struct msm_kms *kms = priv->kms;
  51         struct drm_gem_object *obj;
  52         struct msm_gem_object *msm_obj;
  53         struct dma_fence *fence;
  54
  55         if (!new_state->fb)
  56                 return 0;
  57
  58         obj = msm_framebuffer_bo(new_state->fb, 0);
  59         msm_obj = to_msm_bo(obj);
  60         fence = reservation_object_get_excl_rcu(msm_obj->resv);
  61
  62         drm_atomic_set_fence_for_plane(new_state, fence);
  63
  64         return msm_framebuffer_prepare(new_state->fb, kms->aspace);
  65 }
  66
  67 void msm_atomic_commit_tail(struct drm_atomic_state *state)
  68 {
  69         struct drm_device *dev = state->dev;
  70         struct msm_drm_private *priv = dev->dev_private;
  71         struct msm_kms *kms = priv->kms;
  72
  73         kms->funcs->prepare_commit(kms, state);
  74
  75         drm_atomic_helper_commit_modeset_disables(dev, state);
  76
  77         drm_atomic_helper_commit_planes(dev, state, 0);
  78
  79         drm_atomic_helper_commit_modeset_enables(dev, state);
  80
  81         if (kms->funcs->commit) {
  82                 DRM_DEBUG_ATOMIC("triggering commit\n");
  83                 kms->funcs->commit(kms, state);
  84         }
  85
  86         if (!state->legacy_cursor_update)
  87                 msm_atomic_wait_for_commit_done(dev, state);
  88
  89         kms->funcs->complete_commit(kms, state);
  90
  91         drm_atomic_helper_commit_hw_done(state);
  92
  93         drm_atomic_helper_cleanup_planes(dev, state);
  94 }