diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/dss/manager.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/manager.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/manager.c b/drivers/gpu/drm/omapdrm/dss/manager.c new file mode 100644 index 000000000000..08a67f4f6a20 --- /dev/null +++ b/drivers/gpu/drm/omapdrm/dss/manager.c @@ -0,0 +1,263 @@ +/* + * linux/drivers/video/omap2/dss/manager.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 "MANAGER" + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/jiffies.h> + +#include <video/omapdss.h> + +#include "dss.h" +#include "dss_features.h" + +static int num_managers; +static struct omap_overlay_manager *managers; + +int dss_init_overlay_managers(void) +{ + int i; + + num_managers = dss_feat_get_num_mgrs(); + + managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers, + GFP_KERNEL); + + BUG_ON(managers == NULL); + + for (i = 0; i < num_managers; ++i) { + struct omap_overlay_manager *mgr = &managers[i]; + + switch (i) { + case 0: + mgr->name = "lcd"; + mgr->id = OMAP_DSS_CHANNEL_LCD; + break; + case 1: + mgr->name = "tv"; + mgr->id = OMAP_DSS_CHANNEL_DIGIT; + break; + case 2: + mgr->name = "lcd2"; + mgr->id = OMAP_DSS_CHANNEL_LCD2; + break; + case 3: + mgr->name = "lcd3"; + mgr->id = OMAP_DSS_CHANNEL_LCD3; + break; + } + + mgr->caps = 0; + mgr->supported_displays = + dss_feat_get_supported_displays(mgr->id); + mgr->supported_outputs = + dss_feat_get_supported_outputs(mgr->id); + + INIT_LIST_HEAD(&mgr->overlays); + } + + return 0; +} + +int dss_init_overlay_managers_sysfs(struct platform_device *pdev) +{ + int i, r; + + for (i = 0; i < num_managers; ++i) { + struct omap_overlay_manager *mgr = &managers[i]; + + r = dss_manager_kobj_init(mgr, pdev); + if (r) + DSSERR("failed to create sysfs file\n"); + } + + return 0; +} + +void dss_uninit_overlay_managers(void) +{ + kfree(managers); + managers = NULL; + num_managers = 0; +} + +void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev) +{ + int i; + + for (i = 0; i < num_managers; ++i) { + struct omap_overlay_manager *mgr = &managers[i]; + + dss_manager_kobj_uninit(mgr); + } +} + +int omap_dss_get_num_overlay_managers(void) +{ + return num_managers; +} +EXPORT_SYMBOL(omap_dss_get_num_overlay_managers); + +struct omap_overlay_manager *omap_dss_get_overlay_manager(int num) +{ + if (num >= num_managers) + return NULL; + + return &managers[num]; +} +EXPORT_SYMBOL(omap_dss_get_overlay_manager); + +int dss_mgr_simple_check(struct omap_overlay_manager *mgr, + const struct omap_overlay_manager_info *info) +{ + if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) { + /* + * OMAP3 supports only graphics source transparency color key + * and alpha blending simultaneously. See TRM 15.4.2.4.2.2 + * Alpha Mode. + */ + if (info->partial_alpha_enabled && info->trans_enabled + && info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) { + DSSERR("check_manager: illegal transparency key\n"); + return -EINVAL; + } + } + + return 0; +} + +static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr, + struct omap_overlay_info **overlay_infos) +{ + struct omap_overlay *ovl1, *ovl2; + struct omap_overlay_info *info1, *info2; + + list_for_each_entry(ovl1, &mgr->overlays, list) { + info1 = overlay_infos[ovl1->id]; + + if (info1 == NULL) + continue; + + list_for_each_entry(ovl2, &mgr->overlays, list) { + if (ovl1 == ovl2) + continue; + + info2 = overlay_infos[ovl2->id]; + + if (info2 == NULL) + continue; + + if (info1->zorder == info2->zorder) { + DSSERR("overlays %d and %d have the same " + "zorder %d\n", + ovl1->id, ovl2->id, info1->zorder); + return -EINVAL; + } + } + } + + return 0; +} + +int dss_mgr_check_timings(struct omap_overlay_manager *mgr, + const struct omap_video_timings *timings) +{ + if (!dispc_mgr_timings_ok(mgr->id, timings)) { + DSSERR("check_manager: invalid timings\n"); + return -EINVAL; + } + + return 0; +} + +static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr, + const struct dss_lcd_mgr_config *config) +{ + struct dispc_clock_info cinfo = config->clock_info; + int dl = config->video_port_width; + bool stallmode = config->stallmode; + bool fifohandcheck = config->fifohandcheck; + + if (cinfo.lck_div < 1 || cinfo.lck_div > 255) + return -EINVAL; + + if (cinfo.pck_div < 1 || cinfo.pck_div > 255) + return -EINVAL; + + if (dl != 12 && dl != 16 && dl != 18 && dl != 24) + return -EINVAL; + + /* fifohandcheck should be used only with stallmode */ + if (!stallmode && fifohandcheck) + return -EINVAL; + + /* + * io pad mode can be only checked by using dssdev connected to the + * manager. Ignore checking these for now, add checks when manager + * is capable of holding information related to the connected interface + */ + + return 0; +} + +int dss_mgr_check(struct omap_overlay_manager *mgr, + struct omap_overlay_manager_info *info, + const struct omap_video_timings *mgr_timings, + const struct dss_lcd_mgr_config *lcd_config, + struct omap_overlay_info **overlay_infos) +{ + struct omap_overlay *ovl; + int r; + + if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) { + r = dss_mgr_check_zorder(mgr, overlay_infos); + if (r) + return r; + } + + r = dss_mgr_check_timings(mgr, mgr_timings); + if (r) + return r; + + r = dss_mgr_check_lcd_config(mgr, lcd_config); + if (r) + return r; + + list_for_each_entry(ovl, &mgr->overlays, list) { + struct omap_overlay_info *oi; + int r; + + oi = overlay_infos[ovl->id]; + + if (oi == NULL) + continue; + + r = dss_ovl_check(ovl, oi, mgr_timings); + if (r) + return r; + } + + return 0; +} |
