GNU Linux-libre 4.19.211-gnu1
[releases.git] / 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 "msm_drv.h"
19 #include "msm_gem.h"
20 #include "msm_kms.h"
21
22 static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
23                 struct drm_atomic_state *old_state)
24 {
25         struct drm_crtc *crtc;
26         struct drm_crtc_state *new_crtc_state;
27         struct msm_drm_private *priv = old_state->dev->dev_private;
28         struct msm_kms *kms = priv->kms;
29         int i;
30
31         for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
32                 if (!new_crtc_state->active)
33                         continue;
34
35                 if (drm_crtc_vblank_get(crtc))
36                         continue;
37
38                 kms->funcs->wait_for_crtc_commit_done(kms, crtc);
39
40                 drm_crtc_vblank_put(crtc);
41         }
42 }
43
44 int msm_atomic_prepare_fb(struct drm_plane *plane,
45                           struct drm_plane_state *new_state)
46 {
47         struct msm_drm_private *priv = plane->dev->dev_private;
48         struct msm_kms *kms = priv->kms;
49         struct drm_gem_object *obj;
50         struct msm_gem_object *msm_obj;
51         struct dma_fence *fence;
52
53         if (!new_state->fb)
54                 return 0;
55
56         obj = msm_framebuffer_bo(new_state->fb, 0);
57         msm_obj = to_msm_bo(obj);
58         fence = reservation_object_get_excl_rcu(msm_obj->resv);
59
60         drm_atomic_set_fence_for_plane(new_state, fence);
61
62         return msm_framebuffer_prepare(new_state->fb, kms->aspace);
63 }
64
65 void msm_atomic_commit_tail(struct drm_atomic_state *state)
66 {
67         struct drm_device *dev = state->dev;
68         struct msm_drm_private *priv = dev->dev_private;
69         struct msm_kms *kms = priv->kms;
70
71         kms->funcs->prepare_commit(kms, state);
72
73         drm_atomic_helper_commit_modeset_disables(dev, state);
74
75         drm_atomic_helper_commit_planes(dev, state, 0);
76
77         drm_atomic_helper_commit_modeset_enables(dev, state);
78
79         if (kms->funcs->commit) {
80                 DRM_DEBUG_ATOMIC("triggering commit\n");
81                 kms->funcs->commit(kms, state);
82         }
83
84         msm_atomic_wait_for_commit_done(dev, state);
85
86         kms->funcs->complete_commit(kms, state);
87
88         drm_atomic_helper_commit_hw_done(state);
89
90         drm_atomic_helper_cleanup_planes(dev, state);
91 }