1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/dss/overlay.c
4 *
5 * Copyright (C) 2009 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 *
8 * Some code and ideas taken from drivers/video/omap/ driver
9 * by Imre Deak.
10 */
11
12 #define DSS_SUBSYS_NAME "OVERLAY"
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/err.h>
17 #include <linux/sysfs.h>
18 #include <linux/platform_device.h>
19 #include <linux/delay.h>
20 #include <linux/slab.h>
21
22 #include <video/omapfb_dss.h>
23
24 #include "dss.h"
25 #include "dss_features.h"
26
27 static int num_overlays;
28 static struct omap_overlay *overlays;
29
omap_dss_get_num_overlays(void)30 int omap_dss_get_num_overlays(void)
31 {
32 return num_overlays;
33 }
34 EXPORT_SYMBOL(omap_dss_get_num_overlays);
35
omap_dss_get_overlay(int num)36 struct omap_overlay *omap_dss_get_overlay(int num)
37 {
38 if (num >= num_overlays)
39 return NULL;
40
41 return &overlays[num];
42 }
43 EXPORT_SYMBOL(omap_dss_get_overlay);
44
dss_init_overlays(struct platform_device * pdev)45 void dss_init_overlays(struct platform_device *pdev)
46 {
47 int i, r;
48
49 num_overlays = dss_feat_get_num_ovls();
50
51 overlays = kcalloc(num_overlays, sizeof(struct omap_overlay),
52 GFP_KERNEL);
53
54 BUG_ON(overlays == NULL);
55
56 for (i = 0; i < num_overlays; ++i) {
57 struct omap_overlay *ovl = &overlays[i];
58
59 switch (i) {
60 case 0:
61 ovl->name = "gfx";
62 ovl->id = OMAP_DSS_GFX;
63 break;
64 case 1:
65 ovl->name = "vid1";
66 ovl->id = OMAP_DSS_VIDEO1;
67 break;
68 case 2:
69 ovl->name = "vid2";
70 ovl->id = OMAP_DSS_VIDEO2;
71 break;
72 case 3:
73 ovl->name = "vid3";
74 ovl->id = OMAP_DSS_VIDEO3;
75 break;
76 }
77
78 ovl->caps = dss_feat_get_overlay_caps(ovl->id);
79 ovl->supported_modes =
80 dss_feat_get_supported_color_modes(ovl->id);
81
82 r = dss_overlay_kobj_init(ovl, pdev);
83 if (r)
84 DSSERR("failed to create sysfs file\n");
85 }
86 }
87
dss_uninit_overlays(struct platform_device * pdev)88 void dss_uninit_overlays(struct platform_device *pdev)
89 {
90 int i;
91
92 for (i = 0; i < num_overlays; ++i) {
93 struct omap_overlay *ovl = &overlays[i];
94 dss_overlay_kobj_uninit(ovl);
95 }
96
97 kfree(overlays);
98 overlays = NULL;
99 num_overlays = 0;
100 }
101
dss_ovl_simple_check(struct omap_overlay * ovl,const struct omap_overlay_info * info)102 int dss_ovl_simple_check(struct omap_overlay *ovl,
103 const struct omap_overlay_info *info)
104 {
105 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
106 if (info->out_width != 0 && info->width != info->out_width) {
107 DSSERR("check_overlay: overlay %d doesn't support "
108 "scaling\n", ovl->id);
109 return -EINVAL;
110 }
111
112 if (info->out_height != 0 && info->height != info->out_height) {
113 DSSERR("check_overlay: overlay %d doesn't support "
114 "scaling\n", ovl->id);
115 return -EINVAL;
116 }
117 }
118
119 if ((ovl->supported_modes & info->color_mode) == 0) {
120 DSSERR("check_overlay: overlay %d doesn't support mode %d\n",
121 ovl->id, info->color_mode);
122 return -EINVAL;
123 }
124
125 if (info->zorder >= omap_dss_get_num_overlays()) {
126 DSSERR("check_overlay: zorder %d too high\n", info->zorder);
127 return -EINVAL;
128 }
129
130 if (dss_feat_rotation_type_supported(info->rotation_type) == 0) {
131 DSSERR("check_overlay: rotation type %d not supported\n",
132 info->rotation_type);
133 return -EINVAL;
134 }
135
136 return 0;
137 }
138
dss_ovl_check(struct omap_overlay * ovl,struct omap_overlay_info * info,const struct omap_video_timings * mgr_timings)139 int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info,
140 const struct omap_video_timings *mgr_timings)
141 {
142 u16 outw, outh;
143 u16 dw, dh;
144
145 dw = mgr_timings->x_res;
146 dh = mgr_timings->y_res;
147
148 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
149 outw = info->width;
150 outh = info->height;
151 } else {
152 if (info->out_width == 0)
153 outw = info->width;
154 else
155 outw = info->out_width;
156
157 if (info->out_height == 0)
158 outh = info->height;
159 else
160 outh = info->out_height;
161 }
162
163 if (dw < info->pos_x + outw) {
164 DSSERR("overlay %d horizontally not inside the display area "
165 "(%d + %d >= %d)\n",
166 ovl->id, info->pos_x, outw, dw);
167 return -EINVAL;
168 }
169
170 if (dh < info->pos_y + outh) {
171 DSSERR("overlay %d vertically not inside the display area "
172 "(%d + %d >= %d)\n",
173 ovl->id, info->pos_y, outh, dh);
174 return -EINVAL;
175 }
176
177 return 0;
178 }
179
180 /*
181 * Checks if replication logic should be used. Only use when overlay is in
182 * RGB12U or RGB16 mode, and video port width interface is 18bpp or 24bpp
183 */
dss_ovl_use_replication(struct dss_lcd_mgr_config config,enum omap_color_mode mode)184 bool dss_ovl_use_replication(struct dss_lcd_mgr_config config,
185 enum omap_color_mode mode)
186 {
187 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
188 return false;
189
190 return config.video_port_width > 16;
191 }
192