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f76ee892 TV |
1 | /* |
2 | * linux/drivers/video/omap2/dss/overlay.c | |
3 | * | |
4 | * Copyright (C) 2009 Nokia Corporation | |
5 | * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> | |
6 | * | |
7 | * Some code and ideas taken from drivers/video/omap/ driver | |
8 | * by Imre Deak. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License version 2 as published by | |
12 | * the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
17 | * more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along with | |
20 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | #define DSS_SUBSYS_NAME "OVERLAY" | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/err.h> | |
28 | #include <linux/sysfs.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/slab.h> | |
32 | ||
62d9e44e | 33 | #include <video/omapfb_dss.h> |
f76ee892 TV |
34 | |
35 | #include "dss.h" | |
36 | #include "dss_features.h" | |
37 | ||
38 | static int num_overlays; | |
39 | static struct omap_overlay *overlays; | |
40 | ||
41 | int omap_dss_get_num_overlays(void) | |
42 | { | |
43 | return num_overlays; | |
44 | } | |
45 | EXPORT_SYMBOL(omap_dss_get_num_overlays); | |
46 | ||
47 | struct omap_overlay *omap_dss_get_overlay(int num) | |
48 | { | |
49 | if (num >= num_overlays) | |
50 | return NULL; | |
51 | ||
52 | return &overlays[num]; | |
53 | } | |
54 | EXPORT_SYMBOL(omap_dss_get_overlay); | |
55 | ||
56 | void dss_init_overlays(struct platform_device *pdev) | |
57 | { | |
58 | int i, r; | |
59 | ||
60 | num_overlays = dss_feat_get_num_ovls(); | |
61 | ||
6396bb22 KC |
62 | overlays = kcalloc(num_overlays, sizeof(struct omap_overlay), |
63 | GFP_KERNEL); | |
f76ee892 TV |
64 | |
65 | BUG_ON(overlays == NULL); | |
66 | ||
67 | for (i = 0; i < num_overlays; ++i) { | |
68 | struct omap_overlay *ovl = &overlays[i]; | |
69 | ||
70 | switch (i) { | |
71 | case 0: | |
72 | ovl->name = "gfx"; | |
73 | ovl->id = OMAP_DSS_GFX; | |
74 | break; | |
75 | case 1: | |
76 | ovl->name = "vid1"; | |
77 | ovl->id = OMAP_DSS_VIDEO1; | |
78 | break; | |
79 | case 2: | |
80 | ovl->name = "vid2"; | |
81 | ovl->id = OMAP_DSS_VIDEO2; | |
82 | break; | |
83 | case 3: | |
84 | ovl->name = "vid3"; | |
85 | ovl->id = OMAP_DSS_VIDEO3; | |
86 | break; | |
87 | } | |
88 | ||
89 | ovl->caps = dss_feat_get_overlay_caps(ovl->id); | |
90 | ovl->supported_modes = | |
91 | dss_feat_get_supported_color_modes(ovl->id); | |
92 | ||
93 | r = dss_overlay_kobj_init(ovl, pdev); | |
94 | if (r) | |
95 | DSSERR("failed to create sysfs file\n"); | |
96 | } | |
97 | } | |
98 | ||
99 | void dss_uninit_overlays(struct platform_device *pdev) | |
100 | { | |
101 | int i; | |
102 | ||
103 | for (i = 0; i < num_overlays; ++i) { | |
104 | struct omap_overlay *ovl = &overlays[i]; | |
105 | dss_overlay_kobj_uninit(ovl); | |
106 | } | |
107 | ||
108 | kfree(overlays); | |
109 | overlays = NULL; | |
110 | num_overlays = 0; | |
111 | } | |
112 | ||
113 | int dss_ovl_simple_check(struct omap_overlay *ovl, | |
114 | const struct omap_overlay_info *info) | |
115 | { | |
116 | if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) { | |
117 | if (info->out_width != 0 && info->width != info->out_width) { | |
118 | DSSERR("check_overlay: overlay %d doesn't support " | |
119 | "scaling\n", ovl->id); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | if (info->out_height != 0 && info->height != info->out_height) { | |
124 | DSSERR("check_overlay: overlay %d doesn't support " | |
125 | "scaling\n", ovl->id); | |
126 | return -EINVAL; | |
127 | } | |
128 | } | |
129 | ||
130 | if ((ovl->supported_modes & info->color_mode) == 0) { | |
131 | DSSERR("check_overlay: overlay %d doesn't support mode %d\n", | |
132 | ovl->id, info->color_mode); | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
136 | if (info->zorder >= omap_dss_get_num_overlays()) { | |
137 | DSSERR("check_overlay: zorder %d too high\n", info->zorder); | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | if (dss_feat_rotation_type_supported(info->rotation_type) == 0) { | |
142 | DSSERR("check_overlay: rotation type %d not supported\n", | |
143 | info->rotation_type); | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info, | |
151 | const struct omap_video_timings *mgr_timings) | |
152 | { | |
153 | u16 outw, outh; | |
154 | u16 dw, dh; | |
155 | ||
156 | dw = mgr_timings->x_res; | |
157 | dh = mgr_timings->y_res; | |
158 | ||
159 | if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) { | |
160 | outw = info->width; | |
161 | outh = info->height; | |
162 | } else { | |
163 | if (info->out_width == 0) | |
164 | outw = info->width; | |
165 | else | |
166 | outw = info->out_width; | |
167 | ||
168 | if (info->out_height == 0) | |
169 | outh = info->height; | |
170 | else | |
171 | outh = info->out_height; | |
172 | } | |
173 | ||
174 | if (dw < info->pos_x + outw) { | |
175 | DSSERR("overlay %d horizontally not inside the display area " | |
176 | "(%d + %d >= %d)\n", | |
177 | ovl->id, info->pos_x, outw, dw); | |
178 | return -EINVAL; | |
179 | } | |
180 | ||
181 | if (dh < info->pos_y + outh) { | |
182 | DSSERR("overlay %d vertically not inside the display area " | |
183 | "(%d + %d >= %d)\n", | |
184 | ovl->id, info->pos_y, outh, dh); | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | /* | |
192 | * Checks if replication logic should be used. Only use when overlay is in | |
193 | * RGB12U or RGB16 mode, and video port width interface is 18bpp or 24bpp | |
194 | */ | |
195 | bool dss_ovl_use_replication(struct dss_lcd_mgr_config config, | |
196 | enum omap_color_mode mode) | |
197 | { | |
198 | if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16) | |
199 | return false; | |
200 | ||
201 | return config.video_port_width > 16; | |
202 | } |