38f3daf678
Move the platform-data based display device initialization into a separate function, so that we may later add of-based initialization. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
233 lines
5 KiB
C
233 lines
5 KiB
C
/*
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* linux/drivers/video/omap2/dss/sdi.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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* 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 "SDI"
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/regulator/consumer.h>
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#include <linux/export.h>
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#include <linux/platform_device.h>
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#include <video/omapdss.h>
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#include "dss.h"
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static struct {
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bool update_enabled;
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struct regulator *vdds_sdi_reg;
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} sdi;
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static void sdi_basic_init(struct omap_dss_device *dssdev)
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{
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dispc_mgr_set_io_pad_mode(DSS_IO_PAD_MODE_BYPASS);
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dispc_mgr_enable_stallmode(dssdev->manager->id, false);
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dispc_mgr_set_lcd_display_type(dssdev->manager->id,
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OMAP_DSS_LCD_DISPLAY_TFT);
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dispc_mgr_set_tft_data_lines(dssdev->manager->id, 24);
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dispc_lcd_enable_signal_polarity(1);
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}
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int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
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{
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struct omap_video_timings *t = &dssdev->panel.timings;
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struct dss_clock_info dss_cinfo;
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struct dispc_clock_info dispc_cinfo;
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u16 lck_div, pck_div;
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unsigned long fck;
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unsigned long pck;
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int r;
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if (dssdev->manager == NULL) {
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DSSERR("failed to enable display: no manager\n");
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return -ENODEV;
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}
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r = omap_dss_start_device(dssdev);
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if (r) {
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DSSERR("failed to start device\n");
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goto err_start_dev;
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}
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r = regulator_enable(sdi.vdds_sdi_reg);
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if (r)
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goto err_reg_enable;
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r = dispc_runtime_get();
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if (r)
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goto err_get_dispc;
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sdi_basic_init(dssdev);
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/* 15.5.9.1.2 */
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dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
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dispc_mgr_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
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dssdev->panel.acbi, dssdev->panel.acb);
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r = dss_calc_clock_div(1, t->pixel_clock * 1000,
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&dss_cinfo, &dispc_cinfo);
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if (r)
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goto err_calc_clock_div;
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fck = dss_cinfo.fck;
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lck_div = dispc_cinfo.lck_div;
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pck_div = dispc_cinfo.pck_div;
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pck = fck / lck_div / pck_div / 1000;
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if (pck != t->pixel_clock) {
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DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
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"got %lu kHz\n",
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t->pixel_clock, pck);
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t->pixel_clock = pck;
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}
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dss_mgr_set_timings(dssdev->manager, t);
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r = dss_set_clock_div(&dss_cinfo);
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if (r)
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goto err_set_dss_clock_div;
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r = dispc_mgr_set_clock_div(dssdev->manager->id, &dispc_cinfo);
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if (r)
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goto err_set_dispc_clock_div;
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dss_sdi_init(dssdev->phy.sdi.datapairs);
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r = dss_sdi_enable();
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if (r)
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goto err_sdi_enable;
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mdelay(2);
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r = dss_mgr_enable(dssdev->manager);
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if (r)
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goto err_mgr_enable;
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return 0;
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err_mgr_enable:
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dss_sdi_disable();
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err_sdi_enable:
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err_set_dispc_clock_div:
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err_set_dss_clock_div:
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err_calc_clock_div:
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dispc_runtime_put();
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err_get_dispc:
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regulator_disable(sdi.vdds_sdi_reg);
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err_reg_enable:
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omap_dss_stop_device(dssdev);
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err_start_dev:
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return r;
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}
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EXPORT_SYMBOL(omapdss_sdi_display_enable);
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void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
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{
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dss_mgr_disable(dssdev->manager);
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dss_sdi_disable();
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dispc_runtime_put();
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regulator_disable(sdi.vdds_sdi_reg);
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omap_dss_stop_device(dssdev);
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}
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EXPORT_SYMBOL(omapdss_sdi_display_disable);
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static int __init sdi_init_display(struct omap_dss_device *dssdev)
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{
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DSSDBG("SDI init\n");
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if (sdi.vdds_sdi_reg == NULL) {
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struct regulator *vdds_sdi;
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vdds_sdi = dss_get_vdds_sdi();
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if (IS_ERR(vdds_sdi)) {
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DSSERR("can't get VDDS_SDI regulator\n");
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return PTR_ERR(vdds_sdi);
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}
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sdi.vdds_sdi_reg = vdds_sdi;
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}
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return 0;
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}
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static void __init sdi_probe_pdata(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 i, r;
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for (i = 0; i < pdata->num_devices; ++i) {
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struct omap_dss_device *dssdev = pdata->devices[i];
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if (dssdev->type != OMAP_DISPLAY_TYPE_SDI)
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continue;
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r = sdi_init_display(dssdev);
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if (r) {
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DSSERR("device %s init failed: %d\n", dssdev->name, r);
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continue;
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}
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r = omap_dss_register_device(dssdev, &pdev->dev, i);
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if (r)
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DSSERR("device %s register failed: %d\n",
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dssdev->name, r);
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}
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}
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static int __init omap_sdi_probe(struct platform_device *pdev)
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{
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sdi_probe_pdata(pdev);
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return 0;
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}
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static int __exit omap_sdi_remove(struct platform_device *pdev)
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{
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omap_dss_unregister_child_devices(&pdev->dev);
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return 0;
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}
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static struct platform_driver omap_sdi_driver = {
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.remove = __exit_p(omap_sdi_remove),
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.driver = {
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.name = "omapdss_sdi",
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.owner = THIS_MODULE,
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},
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};
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int __init sdi_init_platform_driver(void)
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{
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return platform_driver_probe(&omap_sdi_driver, omap_sdi_probe);
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}
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void __exit sdi_uninit_platform_driver(void)
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{
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platform_driver_unregister(&omap_sdi_driver);
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}
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