669 lines
14 KiB
C
669 lines
14 KiB
C
/*
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* linux/drivers/video/omap2/dss/core.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 "CORE"
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/suspend.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 struct {
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struct platform_device *pdev;
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struct regulator *vdds_dsi_reg;
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struct regulator *vdds_sdi_reg;
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const char *default_display_name;
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} core;
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static char *def_disp_name;
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module_param_named(def_disp, def_disp_name, charp, 0);
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MODULE_PARM_DESC(def_disp, "default display name");
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#ifdef DEBUG
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bool dss_debug;
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module_param_named(debug, dss_debug, bool, 0644);
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#endif
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/* REGULATORS */
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struct regulator *dss_get_vdds_dsi(void)
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{
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struct regulator *reg;
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if (core.vdds_dsi_reg != NULL)
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return core.vdds_dsi_reg;
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reg = regulator_get(&core.pdev->dev, "vdds_dsi");
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if (!IS_ERR(reg))
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core.vdds_dsi_reg = reg;
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return reg;
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}
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struct regulator *dss_get_vdds_sdi(void)
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{
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struct regulator *reg;
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if (core.vdds_sdi_reg != NULL)
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return core.vdds_sdi_reg;
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reg = regulator_get(&core.pdev->dev, "vdds_sdi");
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if (!IS_ERR(reg))
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core.vdds_sdi_reg = reg;
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return reg;
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}
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int dss_get_ctx_loss_count(struct device *dev)
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{
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struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
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int cnt;
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if (!board_data->get_context_loss_count)
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return -ENOENT;
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cnt = board_data->get_context_loss_count(dev);
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WARN_ONCE(cnt < 0, "get_context_loss_count failed: %d\n", cnt);
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return cnt;
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}
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int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
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{
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struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
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if (!board_data->dsi_enable_pads)
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return -ENOENT;
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return board_data->dsi_enable_pads(dsi_id, lane_mask);
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}
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void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
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{
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struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
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if (!board_data->dsi_enable_pads)
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return;
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return board_data->dsi_disable_pads(dsi_id, lane_mask);
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}
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int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
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{
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struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
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if (pdata->set_min_bus_tput)
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return pdata->set_min_bus_tput(dev, tput);
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else
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return 0;
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}
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#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT)
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static int dss_debug_show(struct seq_file *s, void *unused)
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{
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void (*func)(struct seq_file *) = s->private;
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func(s);
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return 0;
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}
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static int dss_debug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, dss_debug_show, inode->i_private);
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}
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static const struct file_operations dss_debug_fops = {
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.open = dss_debug_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct dentry *dss_debugfs_dir;
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static int dss_initialize_debugfs(void)
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{
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dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
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if (IS_ERR(dss_debugfs_dir)) {
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int err = PTR_ERR(dss_debugfs_dir);
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dss_debugfs_dir = NULL;
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return err;
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}
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debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
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&dss_debug_dump_clocks, &dss_debug_fops);
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return 0;
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}
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static void dss_uninitialize_debugfs(void)
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{
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if (dss_debugfs_dir)
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debugfs_remove_recursive(dss_debugfs_dir);
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}
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int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
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{
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struct dentry *d;
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d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
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write, &dss_debug_fops);
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if (IS_ERR(d))
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return PTR_ERR(d);
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return 0;
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}
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#else /* CONFIG_DEBUG_FS && CONFIG_OMAP2_DSS_DEBUG_SUPPORT */
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static inline int dss_initialize_debugfs(void)
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{
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return 0;
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}
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static inline void dss_uninitialize_debugfs(void)
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{
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}
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int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
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{
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return 0;
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}
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#endif /* CONFIG_DEBUG_FS && CONFIG_OMAP2_DSS_DEBUG_SUPPORT */
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/* PLATFORM DEVICE */
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static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
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{
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DSSDBG("pm notif %lu\n", v);
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switch (v) {
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case PM_SUSPEND_PREPARE:
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DSSDBG("suspending displays\n");
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return dss_suspend_all_devices();
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case PM_POST_SUSPEND:
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DSSDBG("resuming displays\n");
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return dss_resume_all_devices();
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default:
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return 0;
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}
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}
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static struct notifier_block omap_dss_pm_notif_block = {
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.notifier_call = omap_dss_pm_notif,
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};
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static int __init omap_dss_probe(struct platform_device *pdev)
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{
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struct omap_dss_board_info *pdata = pdev->dev.platform_data;
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int r;
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core.pdev = pdev;
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dss_features_init();
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dss_apply_init();
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dss_init_overlay_managers(pdev);
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dss_init_overlays(pdev);
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r = dss_initialize_debugfs();
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if (r)
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goto err_debugfs;
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if (def_disp_name)
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core.default_display_name = def_disp_name;
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else if (pdata->default_device)
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core.default_display_name = pdata->default_device->name;
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register_pm_notifier(&omap_dss_pm_notif_block);
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return 0;
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err_debugfs:
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return r;
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}
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static int omap_dss_remove(struct platform_device *pdev)
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{
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unregister_pm_notifier(&omap_dss_pm_notif_block);
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dss_uninitialize_debugfs();
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dss_uninit_overlays(pdev);
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dss_uninit_overlay_managers(pdev);
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return 0;
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}
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static void omap_dss_shutdown(struct platform_device *pdev)
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{
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DSSDBG("shutdown\n");
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dss_disable_all_devices();
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}
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static struct platform_driver omap_dss_driver = {
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.remove = omap_dss_remove,
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.shutdown = omap_dss_shutdown,
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.driver = {
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.name = "omapdss",
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.owner = THIS_MODULE,
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},
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};
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/* BUS */
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static int dss_bus_match(struct device *dev, struct device_driver *driver)
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{
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struct omap_dss_device *dssdev = to_dss_device(dev);
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DSSDBG("bus_match. dev %s/%s, drv %s\n",
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dev_name(dev), dssdev->driver_name, driver->name);
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return strcmp(dssdev->driver_name, driver->name) == 0;
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}
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static ssize_t device_name_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct omap_dss_device *dssdev = to_dss_device(dev);
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return snprintf(buf, PAGE_SIZE, "%s\n",
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dssdev->name ?
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dssdev->name : "");
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}
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static struct device_attribute default_dev_attrs[] = {
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__ATTR(name, S_IRUGO, device_name_show, NULL),
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__ATTR_NULL,
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};
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static ssize_t driver_name_show(struct device_driver *drv, char *buf)
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{
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struct omap_dss_driver *dssdrv = to_dss_driver(drv);
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return snprintf(buf, PAGE_SIZE, "%s\n",
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dssdrv->driver.name ?
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dssdrv->driver.name : "");
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}
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static struct driver_attribute default_drv_attrs[] = {
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__ATTR(name, S_IRUGO, driver_name_show, NULL),
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__ATTR_NULL,
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};
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static struct bus_type dss_bus_type = {
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.name = "omapdss",
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.match = dss_bus_match,
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.dev_attrs = default_dev_attrs,
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.drv_attrs = default_drv_attrs,
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};
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static void dss_bus_release(struct device *dev)
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{
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DSSDBG("bus_release\n");
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}
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static struct device dss_bus = {
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.release = dss_bus_release,
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};
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struct bus_type *dss_get_bus(void)
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{
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return &dss_bus_type;
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}
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/* DRIVER */
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static int dss_driver_probe(struct device *dev)
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{
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int r;
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struct omap_dss_driver *dssdrv = to_dss_driver(dev->driver);
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struct omap_dss_device *dssdev = to_dss_device(dev);
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bool force;
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DSSDBG("driver_probe: dev %s/%s, drv %s\n",
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dev_name(dev), dssdev->driver_name,
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dssdrv->driver.name);
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dss_init_device(core.pdev, dssdev);
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force = core.default_display_name &&
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strcmp(core.default_display_name, dssdev->name) == 0;
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dss_recheck_connections(dssdev, force);
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r = dssdrv->probe(dssdev);
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if (r) {
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DSSERR("driver probe failed: %d\n", r);
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dss_uninit_device(core.pdev, dssdev);
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return r;
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}
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DSSDBG("probe done for device %s\n", dev_name(dev));
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dssdev->driver = dssdrv;
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return 0;
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}
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static int dss_driver_remove(struct device *dev)
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{
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struct omap_dss_driver *dssdrv = to_dss_driver(dev->driver);
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struct omap_dss_device *dssdev = to_dss_device(dev);
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DSSDBG("driver_remove: dev %s/%s\n", dev_name(dev),
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dssdev->driver_name);
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dssdrv->remove(dssdev);
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dss_uninit_device(core.pdev, dssdev);
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dssdev->driver = NULL;
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return 0;
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}
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int omap_dss_register_driver(struct omap_dss_driver *dssdriver)
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{
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dssdriver->driver.bus = &dss_bus_type;
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dssdriver->driver.probe = dss_driver_probe;
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dssdriver->driver.remove = dss_driver_remove;
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if (dssdriver->get_resolution == NULL)
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dssdriver->get_resolution = omapdss_default_get_resolution;
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if (dssdriver->get_recommended_bpp == NULL)
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dssdriver->get_recommended_bpp =
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omapdss_default_get_recommended_bpp;
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if (dssdriver->get_timings == NULL)
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dssdriver->get_timings = omapdss_default_get_timings;
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return driver_register(&dssdriver->driver);
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}
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EXPORT_SYMBOL(omap_dss_register_driver);
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void omap_dss_unregister_driver(struct omap_dss_driver *dssdriver)
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{
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driver_unregister(&dssdriver->driver);
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}
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EXPORT_SYMBOL(omap_dss_unregister_driver);
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/* DEVICE */
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static void reset_device(struct device *dev, int check)
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{
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u8 *dev_p = (u8 *)dev;
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u8 *dev_end = dev_p + sizeof(*dev);
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void *saved_pdata;
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saved_pdata = dev->platform_data;
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if (check) {
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/*
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* Check if there is any other setting than platform_data
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* in struct device; warn that these will be reset by our
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* init.
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*/
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dev->platform_data = NULL;
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while (dev_p < dev_end) {
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if (*dev_p) {
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WARN("%s: struct device fields will be "
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"discarded\n",
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__func__);
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break;
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}
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dev_p++;
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}
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}
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memset(dev, 0, sizeof(*dev));
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dev->platform_data = saved_pdata;
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}
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static void omap_dss_dev_release(struct device *dev)
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{
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reset_device(dev, 0);
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}
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int omap_dss_register_device(struct omap_dss_device *dssdev,
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struct device *parent, int disp_num)
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{
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WARN_ON(!dssdev->driver_name);
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reset_device(&dssdev->dev, 1);
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dssdev->dev.bus = &dss_bus_type;
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dssdev->dev.parent = parent;
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dssdev->dev.release = omap_dss_dev_release;
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dev_set_name(&dssdev->dev, "display%d", disp_num);
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return device_register(&dssdev->dev);
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}
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void omap_dss_unregister_device(struct omap_dss_device *dssdev)
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{
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device_unregister(&dssdev->dev);
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}
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static int dss_unregister_dss_dev(struct device *dev, void *data)
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{
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struct omap_dss_device *dssdev = to_dss_device(dev);
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omap_dss_unregister_device(dssdev);
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return 0;
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}
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void omap_dss_unregister_child_devices(struct device *parent)
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{
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device_for_each_child(parent, NULL, dss_unregister_dss_dev);
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}
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/* BUS */
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static int __init omap_dss_bus_register(void)
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{
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int r;
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r = bus_register(&dss_bus_type);
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if (r) {
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DSSERR("bus register failed\n");
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return r;
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}
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dev_set_name(&dss_bus, "omapdss");
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r = device_register(&dss_bus);
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if (r) {
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DSSERR("bus driver register failed\n");
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bus_unregister(&dss_bus_type);
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return r;
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}
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return 0;
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}
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|
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/* INIT */
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static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
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#ifdef CONFIG_OMAP2_DSS_DPI
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dpi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_SDI
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sdi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_RFBI
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rfbi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_VENC
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venc_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_DSI
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dsi_init_platform_driver,
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#endif
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#ifdef CONFIG_OMAP4_DSS_HDMI
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hdmi_init_platform_driver,
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#endif
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};
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|
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static void (*dss_output_drv_unreg_funcs[])(void) __exitdata = {
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#ifdef CONFIG_OMAP2_DSS_DPI
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dpi_uninit_platform_driver,
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#endif
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#ifdef CONFIG_OMAP2_DSS_SDI
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sdi_uninit_platform_driver,
|
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#endif
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#ifdef CONFIG_OMAP2_DSS_RFBI
|
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rfbi_uninit_platform_driver,
|
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#endif
|
|
#ifdef CONFIG_OMAP2_DSS_VENC
|
|
venc_uninit_platform_driver,
|
|
#endif
|
|
#ifdef CONFIG_OMAP2_DSS_DSI
|
|
dsi_uninit_platform_driver,
|
|
#endif
|
|
#ifdef CONFIG_OMAP4_DSS_HDMI
|
|
hdmi_uninit_platform_driver,
|
|
#endif
|
|
};
|
|
|
|
static bool dss_output_drv_loaded[ARRAY_SIZE(dss_output_drv_reg_funcs)];
|
|
|
|
static int __init omap_dss_register_drivers(void)
|
|
{
|
|
int r;
|
|
int i;
|
|
|
|
r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
|
|
if (r)
|
|
return r;
|
|
|
|
r = dss_init_platform_driver();
|
|
if (r) {
|
|
DSSERR("Failed to initialize DSS platform driver\n");
|
|
goto err_dss;
|
|
}
|
|
|
|
r = dispc_init_platform_driver();
|
|
if (r) {
|
|
DSSERR("Failed to initialize dispc platform driver\n");
|
|
goto err_dispc;
|
|
}
|
|
|
|
/*
|
|
* It's ok if the output-driver register fails. It happens, for example,
|
|
* when there is no output-device (e.g. SDI for OMAP4).
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
|
|
r = dss_output_drv_reg_funcs[i]();
|
|
if (r == 0)
|
|
dss_output_drv_loaded[i] = true;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_dispc:
|
|
dss_uninit_platform_driver();
|
|
err_dss:
|
|
platform_driver_unregister(&omap_dss_driver);
|
|
|
|
return r;
|
|
}
|
|
|
|
static void __exit omap_dss_unregister_drivers(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i) {
|
|
if (dss_output_drv_loaded[i])
|
|
dss_output_drv_unreg_funcs[i]();
|
|
}
|
|
|
|
dispc_uninit_platform_driver();
|
|
dss_uninit_platform_driver();
|
|
|
|
platform_driver_unregister(&omap_dss_driver);
|
|
}
|
|
|
|
#ifdef CONFIG_OMAP2_DSS_MODULE
|
|
static void omap_dss_bus_unregister(void)
|
|
{
|
|
device_unregister(&dss_bus);
|
|
|
|
bus_unregister(&dss_bus_type);
|
|
}
|
|
|
|
static int __init omap_dss_init(void)
|
|
{
|
|
int r;
|
|
|
|
r = omap_dss_bus_register();
|
|
if (r)
|
|
return r;
|
|
|
|
r = omap_dss_register_drivers();
|
|
if (r) {
|
|
omap_dss_bus_unregister();
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit omap_dss_exit(void)
|
|
{
|
|
if (core.vdds_dsi_reg != NULL) {
|
|
regulator_put(core.vdds_dsi_reg);
|
|
core.vdds_dsi_reg = NULL;
|
|
}
|
|
|
|
if (core.vdds_sdi_reg != NULL) {
|
|
regulator_put(core.vdds_sdi_reg);
|
|
core.vdds_sdi_reg = NULL;
|
|
}
|
|
|
|
omap_dss_unregister_drivers();
|
|
|
|
omap_dss_bus_unregister();
|
|
}
|
|
|
|
module_init(omap_dss_init);
|
|
module_exit(omap_dss_exit);
|
|
#else
|
|
static int __init omap_dss_init(void)
|
|
{
|
|
return omap_dss_bus_register();
|
|
}
|
|
|
|
static int __init omap_dss_init2(void)
|
|
{
|
|
return omap_dss_register_drivers();
|
|
}
|
|
|
|
core_initcall(omap_dss_init);
|
|
device_initcall(omap_dss_init2);
|
|
#endif
|
|
|
|
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
|
|
MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
|
|
MODULE_LICENSE("GPL v2");
|
|
|