1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ |
4 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
5 | */ |
6 | |
7 | #include <drm/drm_atomic.h> |
8 | #include <drm/drm_atomic_helper.h> |
9 | #include <drm/drm_blend.h> |
10 | #include <drm/drm_crtc.h> |
11 | #include <drm/drm_fourcc.h> |
12 | #include <drm/drm_framebuffer.h> |
13 | #include <drm/drm_gem_atomic_helper.h> |
14 | |
15 | #include "tidss_crtc.h" |
16 | #include "tidss_dispc.h" |
17 | #include "tidss_drv.h" |
18 | #include "tidss_plane.h" |
19 | |
20 | /* drm_plane_helper_funcs */ |
21 | |
22 | static int tidss_plane_atomic_check(struct drm_plane *plane, |
23 | struct drm_atomic_state *state) |
24 | { |
25 | struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, |
26 | plane); |
27 | struct drm_device *ddev = plane->dev; |
28 | struct tidss_device *tidss = to_tidss(ddev); |
29 | struct tidss_plane *tplane = to_tidss_plane(plane); |
30 | const struct drm_format_info *finfo; |
31 | struct drm_crtc_state *crtc_state; |
32 | u32 hw_plane = tplane->hw_plane_id; |
33 | u32 hw_videoport; |
34 | int ret; |
35 | |
36 | dev_dbg(ddev->dev, "%s\n" , __func__); |
37 | |
38 | if (!new_plane_state->crtc) { |
39 | /* |
40 | * The visible field is not reset by the DRM core but only |
41 | * updated by drm_atomic_helper_check_plane_state(), set it |
42 | * manually. |
43 | */ |
44 | new_plane_state->visible = false; |
45 | return 0; |
46 | } |
47 | |
48 | crtc_state = drm_atomic_get_crtc_state(state, |
49 | crtc: new_plane_state->crtc); |
50 | if (IS_ERR(ptr: crtc_state)) |
51 | return PTR_ERR(ptr: crtc_state); |
52 | |
53 | ret = drm_atomic_helper_check_plane_state(plane_state: new_plane_state, crtc_state, |
54 | min_scale: 0, |
55 | INT_MAX, can_position: true, can_update_disabled: true); |
56 | if (ret < 0) |
57 | return ret; |
58 | |
59 | /* |
60 | * The HW is only able to start drawing at subpixel boundary |
61 | * (the two first checks bellow). At the end of a row the HW |
62 | * can only jump integer number of subpixels forward to the |
63 | * beginning of the next row. So we can only show picture with |
64 | * integer subpixel width (the third check). However, after |
65 | * reaching the end of the drawn picture the drawing starts |
66 | * again at the absolute memory address where top left corner |
67 | * position of the drawn picture is (so there is no need to |
68 | * check for odd height). |
69 | */ |
70 | |
71 | finfo = drm_format_info(format: new_plane_state->fb->format->format); |
72 | |
73 | if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) { |
74 | dev_dbg(ddev->dev, |
75 | "%s: x-position %u not divisible subpixel size %u\n" , |
76 | __func__, (new_plane_state->src_x >> 16), finfo->hsub); |
77 | return -EINVAL; |
78 | } |
79 | |
80 | if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) { |
81 | dev_dbg(ddev->dev, |
82 | "%s: y-position %u not divisible subpixel size %u\n" , |
83 | __func__, (new_plane_state->src_y >> 16), finfo->vsub); |
84 | return -EINVAL; |
85 | } |
86 | |
87 | if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) { |
88 | dev_dbg(ddev->dev, |
89 | "%s: src width %u not divisible by subpixel size %u\n" , |
90 | __func__, (new_plane_state->src_w >> 16), |
91 | finfo->hsub); |
92 | return -EINVAL; |
93 | } |
94 | |
95 | if (!new_plane_state->visible) |
96 | return 0; |
97 | |
98 | hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport; |
99 | |
100 | ret = dispc_plane_check(dispc: tidss->dispc, hw_plane, state: new_plane_state, |
101 | hw_videoport); |
102 | if (ret) |
103 | return ret; |
104 | |
105 | return 0; |
106 | } |
107 | |
108 | static void tidss_plane_atomic_update(struct drm_plane *plane, |
109 | struct drm_atomic_state *state) |
110 | { |
111 | struct drm_device *ddev = plane->dev; |
112 | struct tidss_device *tidss = to_tidss(ddev); |
113 | struct tidss_plane *tplane = to_tidss_plane(plane); |
114 | struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, |
115 | plane); |
116 | u32 hw_videoport; |
117 | |
118 | dev_dbg(ddev->dev, "%s\n" , __func__); |
119 | |
120 | if (!new_state->visible) { |
121 | dispc_plane_enable(dispc: tidss->dispc, hw_plane: tplane->hw_plane_id, enable: false); |
122 | return; |
123 | } |
124 | |
125 | hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport; |
126 | |
127 | dispc_plane_setup(dispc: tidss->dispc, hw_plane: tplane->hw_plane_id, state: new_state, hw_videoport); |
128 | } |
129 | |
130 | static void tidss_plane_atomic_enable(struct drm_plane *plane, |
131 | struct drm_atomic_state *state) |
132 | { |
133 | struct drm_device *ddev = plane->dev; |
134 | struct tidss_device *tidss = to_tidss(ddev); |
135 | struct tidss_plane *tplane = to_tidss_plane(plane); |
136 | |
137 | dev_dbg(ddev->dev, "%s\n" , __func__); |
138 | |
139 | dispc_plane_enable(dispc: tidss->dispc, hw_plane: tplane->hw_plane_id, enable: true); |
140 | } |
141 | |
142 | static void tidss_plane_atomic_disable(struct drm_plane *plane, |
143 | struct drm_atomic_state *state) |
144 | { |
145 | struct drm_device *ddev = plane->dev; |
146 | struct tidss_device *tidss = to_tidss(ddev); |
147 | struct tidss_plane *tplane = to_tidss_plane(plane); |
148 | |
149 | dev_dbg(ddev->dev, "%s\n" , __func__); |
150 | |
151 | dispc_plane_enable(dispc: tidss->dispc, hw_plane: tplane->hw_plane_id, enable: false); |
152 | } |
153 | |
154 | static void drm_plane_destroy(struct drm_plane *plane) |
155 | { |
156 | struct tidss_plane *tplane = to_tidss_plane(plane); |
157 | |
158 | drm_plane_cleanup(plane); |
159 | kfree(objp: tplane); |
160 | } |
161 | |
162 | static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = { |
163 | .atomic_check = tidss_plane_atomic_check, |
164 | .atomic_update = tidss_plane_atomic_update, |
165 | .atomic_enable = tidss_plane_atomic_enable, |
166 | .atomic_disable = tidss_plane_atomic_disable, |
167 | }; |
168 | |
169 | static const struct drm_plane_funcs tidss_plane_funcs = { |
170 | .update_plane = drm_atomic_helper_update_plane, |
171 | .disable_plane = drm_atomic_helper_disable_plane, |
172 | .reset = drm_atomic_helper_plane_reset, |
173 | .destroy = drm_plane_destroy, |
174 | .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, |
175 | .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, |
176 | }; |
177 | |
178 | struct tidss_plane *tidss_plane_create(struct tidss_device *tidss, |
179 | u32 hw_plane_id, u32 plane_type, |
180 | u32 crtc_mask, const u32 *formats, |
181 | u32 num_formats) |
182 | { |
183 | struct tidss_plane *tplane; |
184 | enum drm_plane_type type; |
185 | u32 possible_crtcs; |
186 | u32 num_planes = tidss->feat->num_planes; |
187 | u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) | |
188 | BIT(DRM_COLOR_YCBCR_BT709)); |
189 | u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) | |
190 | BIT(DRM_COLOR_YCBCR_LIMITED_RANGE)); |
191 | u32 default_encoding = DRM_COLOR_YCBCR_BT601; |
192 | u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE; |
193 | u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) | |
194 | BIT(DRM_MODE_BLEND_COVERAGE)); |
195 | int ret; |
196 | |
197 | tplane = kzalloc(size: sizeof(*tplane), GFP_KERNEL); |
198 | if (!tplane) |
199 | return ERR_PTR(error: -ENOMEM); |
200 | |
201 | tplane->hw_plane_id = hw_plane_id; |
202 | |
203 | possible_crtcs = crtc_mask; |
204 | type = plane_type; |
205 | |
206 | ret = drm_universal_plane_init(dev: &tidss->ddev, plane: &tplane->plane, |
207 | possible_crtcs, |
208 | funcs: &tidss_plane_funcs, |
209 | formats, format_count: num_formats, |
210 | NULL, type, NULL); |
211 | if (ret < 0) |
212 | goto err; |
213 | |
214 | drm_plane_helper_add(plane: &tplane->plane, funcs: &tidss_plane_helper_funcs); |
215 | |
216 | drm_plane_create_zpos_property(plane: &tplane->plane, zpos: tidss->num_planes, min: 0, |
217 | max: num_planes - 1); |
218 | |
219 | ret = drm_plane_create_color_properties(plane: &tplane->plane, |
220 | supported_encodings: color_encodings, |
221 | supported_ranges: color_ranges, |
222 | default_encoding, |
223 | default_range); |
224 | if (ret) |
225 | goto err; |
226 | |
227 | ret = drm_plane_create_alpha_property(plane: &tplane->plane); |
228 | if (ret) |
229 | goto err; |
230 | |
231 | ret = drm_plane_create_blend_mode_property(plane: &tplane->plane, supported_modes: blend_modes); |
232 | if (ret) |
233 | goto err; |
234 | |
235 | return tplane; |
236 | |
237 | err: |
238 | kfree(objp: tplane); |
239 | return ERR_PTR(error: ret); |
240 | } |
241 | |