249 lines
5.6 KiB
C
249 lines
5.6 KiB
C
/*
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* linux/drivers/video/omap2/dss/manager.c
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*
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* Copyright (C) 2009 Nokia Corporation
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* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
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*
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* Some code and ideas taken from drivers/video/omap/ driver
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* by Imre Deak.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DSS_SUBSYS_NAME "MANAGER"
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/jiffies.h>
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#include <video/omapdss.h>
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#include "dss.h"
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#include "dss_features.h"
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static int num_managers;
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static struct omap_overlay_manager *managers;
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int dss_init_overlay_managers(struct platform_device *pdev)
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{
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int i, r;
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num_managers = dss_feat_get_num_mgrs();
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managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers,
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GFP_KERNEL);
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BUG_ON(managers == NULL);
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for (i = 0; i < num_managers; ++i) {
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struct omap_overlay_manager *mgr = &managers[i];
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switch (i) {
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case 0:
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mgr->name = "lcd";
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mgr->id = OMAP_DSS_CHANNEL_LCD;
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break;
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case 1:
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mgr->name = "tv";
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mgr->id = OMAP_DSS_CHANNEL_DIGIT;
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break;
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case 2:
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mgr->name = "lcd2";
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mgr->id = OMAP_DSS_CHANNEL_LCD2;
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break;
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case 3:
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mgr->name = "lcd3";
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mgr->id = OMAP_DSS_CHANNEL_LCD3;
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break;
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}
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mgr->caps = 0;
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mgr->supported_displays =
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dss_feat_get_supported_displays(mgr->id);
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mgr->supported_outputs =
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dss_feat_get_supported_outputs(mgr->id);
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INIT_LIST_HEAD(&mgr->overlays);
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r = dss_manager_kobj_init(mgr, pdev);
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if (r)
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DSSERR("failed to create sysfs file\n");
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}
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return 0;
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}
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void dss_uninit_overlay_managers(struct platform_device *pdev)
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{
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int i;
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for (i = 0; i < num_managers; ++i) {
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struct omap_overlay_manager *mgr = &managers[i];
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dss_manager_kobj_uninit(mgr);
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}
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kfree(managers);
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managers = NULL;
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num_managers = 0;
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}
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int omap_dss_get_num_overlay_managers(void)
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{
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return num_managers;
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}
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EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
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struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
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{
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if (num >= num_managers)
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return NULL;
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return &managers[num];
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}
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EXPORT_SYMBOL(omap_dss_get_overlay_manager);
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int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
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const struct omap_overlay_manager_info *info)
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{
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if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
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/*
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* OMAP3 supports only graphics source transparency color key
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* and alpha blending simultaneously. See TRM 15.4.2.4.2.2
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* Alpha Mode.
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*/
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if (info->partial_alpha_enabled && info->trans_enabled
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&& info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
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DSSERR("check_manager: illegal transparency key\n");
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return -EINVAL;
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}
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}
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return 0;
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}
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static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
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struct omap_overlay_info **overlay_infos)
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{
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struct omap_overlay *ovl1, *ovl2;
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struct omap_overlay_info *info1, *info2;
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list_for_each_entry(ovl1, &mgr->overlays, list) {
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info1 = overlay_infos[ovl1->id];
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if (info1 == NULL)
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continue;
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list_for_each_entry(ovl2, &mgr->overlays, list) {
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if (ovl1 == ovl2)
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continue;
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info2 = overlay_infos[ovl2->id];
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if (info2 == NULL)
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continue;
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if (info1->zorder == info2->zorder) {
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DSSERR("overlays %d and %d have the same "
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"zorder %d\n",
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ovl1->id, ovl2->id, info1->zorder);
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return -EINVAL;
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}
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}
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}
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return 0;
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}
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int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
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const struct omap_video_timings *timings)
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{
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if (!dispc_mgr_timings_ok(mgr->id, timings)) {
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DSSERR("check_manager: invalid timings\n");
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return -EINVAL;
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}
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return 0;
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}
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static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
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const struct dss_lcd_mgr_config *config)
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{
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struct dispc_clock_info cinfo = config->clock_info;
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int dl = config->video_port_width;
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bool stallmode = config->stallmode;
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bool fifohandcheck = config->fifohandcheck;
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if (cinfo.lck_div < 1 || cinfo.lck_div > 255)
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return -EINVAL;
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if (cinfo.pck_div < 1 || cinfo.pck_div > 255)
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return -EINVAL;
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if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
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return -EINVAL;
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/* fifohandcheck should be used only with stallmode */
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if (stallmode == false && fifohandcheck == true)
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return -EINVAL;
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/*
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* io pad mode can be only checked by using dssdev connected to the
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* manager. Ignore checking these for now, add checks when manager
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* is capable of holding information related to the connected interface
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*/
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return 0;
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}
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int dss_mgr_check(struct omap_overlay_manager *mgr,
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struct omap_overlay_manager_info *info,
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const struct omap_video_timings *mgr_timings,
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const struct dss_lcd_mgr_config *lcd_config,
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struct omap_overlay_info **overlay_infos)
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{
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struct omap_overlay *ovl;
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int r;
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if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
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r = dss_mgr_check_zorder(mgr, overlay_infos);
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if (r)
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return r;
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}
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r = dss_mgr_check_timings(mgr, mgr_timings);
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if (r)
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return r;
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r = dss_mgr_check_lcd_config(mgr, lcd_config);
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if (r)
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return r;
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list_for_each_entry(ovl, &mgr->overlays, list) {
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struct omap_overlay_info *oi;
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int r;
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oi = overlay_infos[ovl->id];
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if (oi == NULL)
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continue;
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r = dss_ovl_check(ovl, oi, mgr_timings);
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if (r)
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return r;
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}
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return 0;
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}
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