omapfb: Create new header file for omapfb DSS implementation
[linux-2.6/btrfs-unstable.git] / drivers / video / fbdev / omap2 / omapfb / dss / overlay.c
blobd6c5d75d2ef8262d6b13f8286ad912dd33dfce4e
1 /*
2 * linux/drivers/video/omap2/dss/overlay.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * Some code and ideas taken from drivers/video/omap/ driver
8 * by Imre Deak.
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.
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.
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/>.
23 #define DSS_SUBSYS_NAME "OVERLAY"
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>
33 #include <video/omapfb_dss.h>
35 #include "dss.h"
36 #include "dss_features.h"
38 static int num_overlays;
39 static struct omap_overlay *overlays;
41 int omap_dss_get_num_overlays(void)
43 return num_overlays;
45 EXPORT_SYMBOL(omap_dss_get_num_overlays);
47 struct omap_overlay *omap_dss_get_overlay(int num)
49 if (num >= num_overlays)
50 return NULL;
52 return &overlays[num];
54 EXPORT_SYMBOL(omap_dss_get_overlay);
56 void dss_init_overlays(struct platform_device *pdev)
58 int i, r;
60 num_overlays = dss_feat_get_num_ovls();
62 overlays = kzalloc(sizeof(struct omap_overlay) * num_overlays,
63 GFP_KERNEL);
65 BUG_ON(overlays == NULL);
67 for (i = 0; i < num_overlays; ++i) {
68 struct omap_overlay *ovl = &overlays[i];
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;
89 ovl->caps = dss_feat_get_overlay_caps(ovl->id);
90 ovl->supported_modes =
91 dss_feat_get_supported_color_modes(ovl->id);
93 r = dss_overlay_kobj_init(ovl, pdev);
94 if (r)
95 DSSERR("failed to create sysfs file\n");
99 void dss_uninit_overlays(struct platform_device *pdev)
101 int i;
103 for (i = 0; i < num_overlays; ++i) {
104 struct omap_overlay *ovl = &overlays[i];
105 dss_overlay_kobj_uninit(ovl);
108 kfree(overlays);
109 overlays = NULL;
110 num_overlays = 0;
113 int dss_ovl_simple_check(struct omap_overlay *ovl,
114 const struct omap_overlay_info *info)
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;
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;
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;
136 if (info->zorder >= omap_dss_get_num_overlays()) {
137 DSSERR("check_overlay: zorder %d too high\n", info->zorder);
138 return -EINVAL;
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;
147 return 0;
150 int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info,
151 const struct omap_video_timings *mgr_timings)
153 u16 outw, outh;
154 u16 dw, dh;
156 dw = mgr_timings->x_res;
157 dh = mgr_timings->y_res;
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;
168 if (info->out_height == 0)
169 outh = info->height;
170 else
171 outh = info->out_height;
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;
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;
188 return 0;
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
195 bool dss_ovl_use_replication(struct dss_lcd_mgr_config config,
196 enum omap_color_mode mode)
198 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
199 return false;
201 return config.video_port_width > 16;