diff options
Diffstat (limited to 'drivers/video/fbdev/omap2/dss/overlay.c')
| -rw-r--r-- | drivers/video/fbdev/omap2/dss/overlay.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/dss/overlay.c b/drivers/video/fbdev/omap2/dss/overlay.c new file mode 100644 index 000000000000..2f7cee985cdd --- /dev/null +++ b/drivers/video/fbdev/omap2/dss/overlay.c @@ -0,0 +1,202 @@ +/* + * 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. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#define DSS_SUBSYS_NAME "OVERLAY" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/sysfs.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/slab.h> + +#include <video/omapdss.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 = kzalloc(sizeof(struct omap_overlay) * num_overlays, + 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 18bpp or 24bpp + */ +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; +} |