2 * linux/drivers/video/omap2/dss/sdi.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #define DSS_SUBSYS_NAME "SDI"
22 #include <linux/kernel.h>
23 #include <linux/delay.h>
24 #include <linux/err.h>
25 #include <linux/regulator/consumer.h>
26 #include <linux/export.h>
27 #include <linux/platform_device.h>
29 #include <video/omapdss.h>
34 struct regulator *vdds_sdi_reg;
37 static void sdi_basic_init(struct omap_dss_device *dssdev)
40 dispc_mgr_set_io_pad_mode(DSS_IO_PAD_MODE_BYPASS);
41 dispc_mgr_enable_stallmode(dssdev->manager->id, false);
43 dispc_mgr_set_lcd_display_type(dssdev->manager->id,
44 OMAP_DSS_LCD_DISPLAY_TFT);
46 dispc_mgr_set_tft_data_lines(dssdev->manager->id, 24);
47 dispc_lcd_enable_signal_polarity(1);
50 int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
52 struct omap_video_timings *t = &dssdev->panel.timings;
53 struct dss_clock_info dss_cinfo;
54 struct dispc_clock_info dispc_cinfo;
60 if (dssdev->manager == NULL) {
61 DSSERR("failed to enable display: no manager\n");
65 r = omap_dss_start_device(dssdev);
67 DSSERR("failed to start device\n");
71 r = regulator_enable(sdi.vdds_sdi_reg);
75 r = dispc_runtime_get();
79 sdi_basic_init(dssdev);
82 dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF;
84 dispc_mgr_set_pol_freq(dssdev->manager->id, dssdev->panel.config,
85 dssdev->panel.acbi, dssdev->panel.acb);
87 r = dss_calc_clock_div(1, t->pixel_clock * 1000,
88 &dss_cinfo, &dispc_cinfo);
90 goto err_calc_clock_div;
93 lck_div = dispc_cinfo.lck_div;
94 pck_div = dispc_cinfo.pck_div;
96 pck = fck / lck_div / pck_div / 1000;
98 if (pck != t->pixel_clock) {
99 DSSWARN("Could not find exact pixel clock. Requested %d kHz, "
101 t->pixel_clock, pck);
103 t->pixel_clock = pck;
107 dss_mgr_set_timings(dssdev->manager, t);
109 r = dss_set_clock_div(&dss_cinfo);
111 goto err_set_dss_clock_div;
113 r = dispc_mgr_set_clock_div(dssdev->manager->id, &dispc_cinfo);
115 goto err_set_dispc_clock_div;
117 dss_sdi_init(dssdev->phy.sdi.datapairs);
118 r = dss_sdi_enable();
123 r = dss_mgr_enable(dssdev->manager);
132 err_set_dispc_clock_div:
133 err_set_dss_clock_div:
137 regulator_disable(sdi.vdds_sdi_reg);
139 omap_dss_stop_device(dssdev);
143 EXPORT_SYMBOL(omapdss_sdi_display_enable);
145 void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
147 dss_mgr_disable(dssdev->manager);
153 regulator_disable(sdi.vdds_sdi_reg);
155 omap_dss_stop_device(dssdev);
157 EXPORT_SYMBOL(omapdss_sdi_display_disable);
159 static int __init sdi_init_display(struct omap_dss_device *dssdev)
161 DSSDBG("SDI init\n");
163 if (sdi.vdds_sdi_reg == NULL) {
164 struct regulator *vdds_sdi;
166 vdds_sdi = dss_get_vdds_sdi();
168 if (IS_ERR(vdds_sdi)) {
169 DSSERR("can't get VDDS_SDI regulator\n");
170 return PTR_ERR(vdds_sdi);
173 sdi.vdds_sdi_reg = vdds_sdi;
179 static void __init sdi_probe_pdata(struct platform_device *pdev)
181 struct omap_dss_board_info *pdata = pdev->dev.platform_data;
184 for (i = 0; i < pdata->num_devices; ++i) {
185 struct omap_dss_device *dssdev = pdata->devices[i];
187 if (dssdev->type != OMAP_DISPLAY_TYPE_SDI)
190 r = sdi_init_display(dssdev);
192 DSSERR("device %s init failed: %d\n", dssdev->name, r);
196 r = omap_dss_register_device(dssdev, &pdev->dev, i);
198 DSSERR("device %s register failed: %d\n",
203 static int __init omap_sdi_probe(struct platform_device *pdev)
205 sdi_probe_pdata(pdev);
210 static int __exit omap_sdi_remove(struct platform_device *pdev)
212 omap_dss_unregister_child_devices(&pdev->dev);
217 static struct platform_driver omap_sdi_driver = {
218 .remove = __exit_p(omap_sdi_remove),
220 .name = "omapdss_sdi",
221 .owner = THIS_MODULE,
225 int __init sdi_init_platform_driver(void)
227 return platform_driver_probe(&omap_sdi_driver, omap_sdi_probe);
230 void __exit sdi_uninit_platform_driver(void)
232 platform_driver_unregister(&omap_sdi_driver);