// SPDX-License-Identifier: GPL-2.0-only
/*
* linux / drivers / video / omap2 / dss / overlay . c
*
* Copyright ( C ) 2009 Nokia Corporation
* Author : Tomi Valkeinen < tomi . valkeinen @ nokia . com >
*
* Some code and ideas taken from drivers / video / omap / driver
* by Imre Deak .
*/
#define DSS_SUBSYS_NAME "OVERLAY"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <video/omapfb_dss.h>
#include "dss.h"
#include "dss_features.h"
static int num_overlays;
static struct omap_overlay *overlays;
int omap_dss_get_num_overlays(void )
{
return num_overlays;
}
EXPORT_SYMBOL(omap_dss_get_num_overlays);
struct omap_overlay *omap_dss_get_overlay(int num)
{
if (num >= num_overlays)
return NULL;
return &overlays[num];
}
EXPORT_SYMBOL(omap_dss_get_overlay);
void dss_init_overlays(struct platform_device *pdev)
{
int i, r;
num_overlays = dss_feat_get_num_ovls();
overlays = kcalloc(num_overlays, sizeof (struct omap_overlay),
GFP_KERNEL);
BUG_ON(overlays == NULL);
for (i = 0 ; i < num_overlays; ++i) {
struct omap_overlay *ovl = &overlays[i];
switch (i) {
case 0 :
ovl->name = "gfx" ;
ovl->id = OMAP_DSS_GFX;
break ;
case 1 :
ovl->name = "vid1" ;
ovl->id = OMAP_DSS_VIDEO1;
break ;
case 2 :
ovl->name = "vid2" ;
ovl->id = OMAP_DSS_VIDEO2;
break ;
case 3 :
ovl->name = "vid3" ;
ovl->id = OMAP_DSS_VIDEO3;
break ;
}
ovl->caps = dss_feat_get_overlay_caps(ovl->id);
ovl->supported_modes =
dss_feat_get_supported_color_modes(ovl->id);
r = dss_overlay_kobj_init(ovl, pdev);
if (r)
DSSERR("failed to create sysfs file\n" );
}
}
void dss_uninit_overlays(struct platform_device *pdev)
{
int i;
for (i = 0 ; i < num_overlays; ++i) {
struct omap_overlay *ovl = &overlays[i];
dss_overlay_kobj_uninit(ovl);
}
kfree(overlays);
overlays = NULL;
num_overlays = 0 ;
}
int dss_ovl_simple_check(struct omap_overlay *ovl,
const struct omap_overlay_info *info)
{
if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0 ) {
if (info->out_width != 0 && info->width != info->out_width) {
DSSERR("check_overlay: overlay %d doesn't support "
"scaling\n" , ovl->id);
return -EINVAL;
}
if (info->out_height != 0 && info->height != info->out_height) {
DSSERR("check_overlay: overlay %d doesn't support "
"scaling\n" , ovl->id);
return -EINVAL;
}
}
if ((ovl->supported_modes & info->color_mode) == 0 ) {
DSSERR("check_overlay: overlay %d doesn't support mode %d\n" ,
ovl->id, info->color_mode);
return -EINVAL;
}
if (info->zorder >= omap_dss_get_num_overlays()) {
DSSERR("check_overlay: zorder %d too high\n" , info->zorder);
return -EINVAL;
}
if (dss_feat_rotation_type_supported(info->rotation_type) == 0 ) {
DSSERR("check_overlay: rotation type %d not supported\n" ,
info->rotation_type);
return -EINVAL;
}
return 0 ;
}
int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info,
const struct omap_video_timings *mgr_timings)
{
u16 outw, outh;
u16 dw, dh;
dw = mgr_timings->x_res;
dh = mgr_timings->y_res;
if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0 ) {
outw = info->width;
outh = info->height;
} else {
if (info->out_width == 0 )
outw = info->width;
else
outw = info->out_width;
if (info->out_height == 0 )
outh = info->height;
else
outh = info->out_height;
}
if (dw < info->pos_x + outw) {
DSSERR("overlay %d horizontally not inside the display area "
"(%d + %d >= %d)\n" ,
ovl->id, info->pos_x, outw, dw);
return -EINVAL;
}
if (dh < info->pos_y + outh) {
DSSERR("overlay %d vertically not inside the display area "
"(%d + %d >= %d)\n" ,
ovl->id, info->pos_y, outh, dh);
return -EINVAL;
}
return 0 ;
}
/*
* Checks if replication logic should be used . Only use when overlay is in
* RGB12U or RGB16 mode , and video port width interface is 18 bpp or 24 bpp
*/
bool dss_ovl_use_replication(struct dss_lcd_mgr_config config,
enum omap_color_mode mode)
{
if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
return false ;
return config.video_port_width > 16 ;
}
Messung V0.5 in Prozent C=98 H=98 G=97
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-12)
¤
*© Formatika GbR, Deutschland