1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2015 Texas Instruments |
4 | * Author: Jyri Sarha <jsarha@ti.com> |
5 | */ |
6 | |
7 | #include <drm/drm_atomic.h> |
8 | #include <drm/drm_atomic_helper.h> |
9 | #include <drm/drm_fourcc.h> |
10 | #include <drm/drm_framebuffer.h> |
11 | |
12 | #include "tilcdc_drv.h" |
13 | |
14 | static const struct drm_plane_funcs tilcdc_plane_funcs = { |
15 | .update_plane = drm_atomic_helper_update_plane, |
16 | .disable_plane = drm_atomic_helper_disable_plane, |
17 | .destroy = drm_plane_cleanup, |
18 | .reset = drm_atomic_helper_plane_reset, |
19 | .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, |
20 | .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, |
21 | }; |
22 | |
23 | static int tilcdc_plane_atomic_check(struct drm_plane *plane, |
24 | struct drm_atomic_state *state) |
25 | { |
26 | struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, |
27 | plane); |
28 | struct drm_crtc_state *crtc_state; |
29 | struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, |
30 | plane); |
31 | unsigned int pitch; |
32 | |
33 | if (!new_state->crtc) |
34 | return 0; |
35 | |
36 | if (WARN_ON(!new_state->fb)) |
37 | return -EINVAL; |
38 | |
39 | if (new_state->crtc_x || new_state->crtc_y) { |
40 | dev_err(plane->dev->dev, "%s: crtc position must be zero." , |
41 | __func__); |
42 | return -EINVAL; |
43 | } |
44 | |
45 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
46 | crtc: new_state->crtc); |
47 | /* we should have a crtc state if the plane is attached to a crtc */ |
48 | if (WARN_ON(!crtc_state)) |
49 | return 0; |
50 | |
51 | if (crtc_state->mode.hdisplay != new_state->crtc_w || |
52 | crtc_state->mode.vdisplay != new_state->crtc_h) { |
53 | dev_err(plane->dev->dev, |
54 | "%s: Size must match mode (%dx%d == %dx%d)" , __func__, |
55 | crtc_state->mode.hdisplay, crtc_state->mode.vdisplay, |
56 | new_state->crtc_w, new_state->crtc_h); |
57 | return -EINVAL; |
58 | } |
59 | |
60 | pitch = crtc_state->mode.hdisplay * |
61 | new_state->fb->format->cpp[0]; |
62 | if (new_state->fb->pitches[0] != pitch) { |
63 | dev_err(plane->dev->dev, |
64 | "Invalid pitch: fb and crtc widths must be the same" ); |
65 | return -EINVAL; |
66 | } |
67 | |
68 | if (old_state->fb && new_state->fb->format != old_state->fb->format) { |
69 | dev_dbg(plane->dev->dev, |
70 | "%s(): pixel format change requires mode_change\n" , |
71 | __func__); |
72 | crtc_state->mode_changed = true; |
73 | } |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | static void tilcdc_plane_atomic_update(struct drm_plane *plane, |
79 | struct drm_atomic_state *state) |
80 | { |
81 | struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, |
82 | plane); |
83 | |
84 | if (!new_state->crtc) |
85 | return; |
86 | |
87 | if (WARN_ON(!new_state->fb || !new_state->crtc->state)) |
88 | return; |
89 | |
90 | if (tilcdc_crtc_update_fb(crtc: new_state->crtc, |
91 | fb: new_state->fb, |
92 | event: new_state->crtc->state->event) == 0) { |
93 | new_state->crtc->state->event = NULL; |
94 | } |
95 | } |
96 | |
97 | static const struct drm_plane_helper_funcs plane_helper_funcs = { |
98 | .atomic_check = tilcdc_plane_atomic_check, |
99 | .atomic_update = tilcdc_plane_atomic_update, |
100 | }; |
101 | |
102 | int tilcdc_plane_init(struct drm_device *dev, |
103 | struct drm_plane *plane) |
104 | { |
105 | struct tilcdc_drm_private *priv = dev->dev_private; |
106 | int ret; |
107 | |
108 | ret = drm_universal_plane_init(dev, plane, possible_crtcs: 1, funcs: &tilcdc_plane_funcs, |
109 | formats: priv->pixelformats, |
110 | format_count: priv->num_pixelformats, |
111 | NULL, type: DRM_PLANE_TYPE_PRIMARY, NULL); |
112 | if (ret) { |
113 | dev_err(dev->dev, "Failed to initialize plane: %d\n" , ret); |
114 | return ret; |
115 | } |
116 | |
117 | drm_plane_helper_add(plane, funcs: &plane_helper_funcs); |
118 | |
119 | return 0; |
120 | } |
121 | |