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_fb_dma_helper.h>
12 #include <drm/drm_fourcc.h>
13 #include <drm/drm_framebuffer.h>
14 #include <drm/drm_gem_atomic_helper.h>
15
16 #include "tidss_crtc.h"
17 #include "tidss_dispc.h"
18 #include "tidss_drv.h"
19 #include "tidss_plane.h"
20
21 /* drm_plane_helper_funcs */
22
tidss_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)23 static int tidss_plane_atomic_check(struct drm_plane *plane,
24 struct drm_atomic_state *state)
25 {
26 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
27 plane);
28 struct drm_device *ddev = plane->dev;
29 struct tidss_device *tidss = to_tidss(ddev);
30 struct tidss_plane *tplane = to_tidss_plane(plane);
31 const struct drm_format_info *finfo;
32 struct drm_crtc_state *crtc_state;
33 u32 hw_plane = tplane->hw_plane_id;
34 u32 hw_videoport;
35 int ret;
36
37 dev_dbg(ddev->dev, "%s\n", __func__);
38
39 if (!new_plane_state->crtc) {
40 /*
41 * The visible field is not reset by the DRM core but only
42 * updated by drm_atomic_helper_check_plane_state(), set it
43 * manually.
44 */
45 new_plane_state->visible = false;
46 return 0;
47 }
48
49 crtc_state = drm_atomic_get_crtc_state(state,
50 new_plane_state->crtc);
51 if (IS_ERR(crtc_state))
52 return PTR_ERR(crtc_state);
53
54 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
55 0,
56 INT_MAX, true, true);
57 if (ret < 0)
58 return ret;
59
60 /*
61 * The HW is only able to start drawing at subpixel boundary
62 * (the two first checks bellow). At the end of a row the HW
63 * can only jump integer number of subpixels forward to the
64 * beginning of the next row. So we can only show picture with
65 * integer subpixel width (the third check). However, after
66 * reaching the end of the drawn picture the drawing starts
67 * again at the absolute memory address where top left corner
68 * position of the drawn picture is (so there is no need to
69 * check for odd height).
70 */
71
72 finfo = drm_format_info(new_plane_state->fb->format->format);
73
74 if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
75 dev_dbg(ddev->dev,
76 "%s: x-position %u not divisible subpixel size %u\n",
77 __func__, (new_plane_state->src_x >> 16), finfo->hsub);
78 return -EINVAL;
79 }
80
81 if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
82 dev_dbg(ddev->dev,
83 "%s: y-position %u not divisible subpixel size %u\n",
84 __func__, (new_plane_state->src_y >> 16), finfo->vsub);
85 return -EINVAL;
86 }
87
88 if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
89 dev_dbg(ddev->dev,
90 "%s: src width %u not divisible by subpixel size %u\n",
91 __func__, (new_plane_state->src_w >> 16),
92 finfo->hsub);
93 return -EINVAL;
94 }
95
96 if (!new_plane_state->visible)
97 return 0;
98
99 hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;
100
101 ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
102 hw_videoport);
103 if (ret)
104 return ret;
105
106 return 0;
107 }
108
tidss_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)109 static void tidss_plane_atomic_update(struct drm_plane *plane,
110 struct drm_atomic_state *state)
111 {
112 struct drm_device *ddev = plane->dev;
113 struct tidss_device *tidss = to_tidss(ddev);
114 struct tidss_plane *tplane = to_tidss_plane(plane);
115 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
116 plane);
117 u32 hw_videoport;
118
119 dev_dbg(ddev->dev, "%s\n", __func__);
120
121 if (!new_state->visible) {
122 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
123 return;
124 }
125
126 hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;
127
128 dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
129 }
130
tidss_plane_atomic_enable(struct drm_plane * plane,struct drm_atomic_state * state)131 static void tidss_plane_atomic_enable(struct drm_plane *plane,
132 struct drm_atomic_state *state)
133 {
134 struct drm_device *ddev = plane->dev;
135 struct tidss_device *tidss = to_tidss(ddev);
136 struct tidss_plane *tplane = to_tidss_plane(plane);
137
138 dev_dbg(ddev->dev, "%s\n", __func__);
139
140 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
141 }
142
tidss_plane_atomic_disable(struct drm_plane * plane,struct drm_atomic_state * state)143 static void tidss_plane_atomic_disable(struct drm_plane *plane,
144 struct drm_atomic_state *state)
145 {
146 struct drm_device *ddev = plane->dev;
147 struct tidss_device *tidss = to_tidss(ddev);
148 struct tidss_plane *tplane = to_tidss_plane(plane);
149
150 dev_dbg(ddev->dev, "%s\n", __func__);
151
152 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
153 }
154
drm_plane_destroy(struct drm_plane * plane)155 static void drm_plane_destroy(struct drm_plane *plane)
156 {
157 struct tidss_plane *tplane = to_tidss_plane(plane);
158
159 drm_plane_cleanup(plane);
160 kfree(tplane);
161 }
162
163 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
164 .atomic_check = tidss_plane_atomic_check,
165 .atomic_update = tidss_plane_atomic_update,
166 .atomic_enable = tidss_plane_atomic_enable,
167 .atomic_disable = tidss_plane_atomic_disable,
168 };
169
170 static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = {
171 .atomic_check = tidss_plane_atomic_check,
172 .atomic_update = tidss_plane_atomic_update,
173 .atomic_enable = tidss_plane_atomic_enable,
174 .atomic_disable = tidss_plane_atomic_disable,
175 .get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
176 };
177
178 static const struct drm_plane_funcs tidss_plane_funcs = {
179 .update_plane = drm_atomic_helper_update_plane,
180 .disable_plane = drm_atomic_helper_disable_plane,
181 .reset = drm_atomic_helper_plane_reset,
182 .destroy = drm_plane_destroy,
183 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
184 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
185 };
186
tidss_plane_create(struct tidss_device * tidss,u32 hw_plane_id,u32 plane_type,u32 crtc_mask,const u32 * formats,u32 num_formats)187 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
188 u32 hw_plane_id, u32 plane_type,
189 u32 crtc_mask, const u32 *formats,
190 u32 num_formats)
191 {
192 struct tidss_plane *tplane;
193 enum drm_plane_type type;
194 u32 possible_crtcs;
195 u32 num_planes = tidss->feat->num_planes;
196 u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
197 BIT(DRM_COLOR_YCBCR_BT709));
198 u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
199 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
200 u32 default_encoding = DRM_COLOR_YCBCR_BT601;
201 u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
202 u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
203 BIT(DRM_MODE_BLEND_COVERAGE));
204 int ret;
205
206 tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
207 if (!tplane)
208 return ERR_PTR(-ENOMEM);
209
210 tplane->hw_plane_id = hw_plane_id;
211
212 possible_crtcs = crtc_mask;
213 type = plane_type;
214
215 ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
216 possible_crtcs,
217 &tidss_plane_funcs,
218 formats, num_formats,
219 NULL, type, NULL);
220 if (ret < 0)
221 goto err;
222
223 if (type == DRM_PLANE_TYPE_PRIMARY)
224 drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs);
225 else
226 drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);
227
228 drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
229 num_planes - 1);
230
231 ret = drm_plane_create_color_properties(&tplane->plane,
232 color_encodings,
233 color_ranges,
234 default_encoding,
235 default_range);
236 if (ret)
237 goto err;
238
239 ret = drm_plane_create_alpha_property(&tplane->plane);
240 if (ret)
241 goto err;
242
243 ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
244 if (ret)
245 goto err;
246
247 return tplane;
248
249 err:
250 kfree(tplane);
251 return ERR_PTR(ret);
252 }
253