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23c0a7a6 TV |
1 | /* |
2 | * linux/drivers/video/omap2/dss/sdi.c | |
3 | * | |
4 | * Copyright (C) 2009 Nokia Corporation | |
5 | * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> | |
6 | * | |
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. | |
10 | * | |
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 | |
14 | * more details. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #define DSS_SUBSYS_NAME "SDI" | |
21 | ||
22 | #include <linux/kernel.h> | |
23c0a7a6 TV |
23 | #include <linux/delay.h> |
24 | #include <linux/err.h> | |
508886cf | 25 | #include <linux/regulator/consumer.h> |
23c0a7a6 | 26 | |
a0b38cc4 | 27 | #include <video/omapdss.h> |
23c0a7a6 TV |
28 | #include "dss.h" |
29 | ||
30 | static struct { | |
23c0a7a6 | 31 | bool update_enabled; |
508886cf | 32 | struct regulator *vdds_sdi_reg; |
23c0a7a6 TV |
33 | } sdi; |
34 | ||
64ba4f74 SS |
35 | static void sdi_basic_init(struct omap_dss_device *dssdev) |
36 | ||
23c0a7a6 | 37 | { |
64ba4f74 SS |
38 | dispc_set_parallel_interface_mode(dssdev->manager->id, |
39 | OMAP_DSS_PARALLELMODE_BYPASS); | |
40 | ||
41 | dispc_set_lcd_display_type(dssdev->manager->id, | |
42 | OMAP_DSS_LCD_DISPLAY_TFT); | |
23c0a7a6 | 43 | |
64ba4f74 | 44 | dispc_set_tft_data_lines(dssdev->manager->id, 24); |
23c0a7a6 TV |
45 | dispc_lcd_enable_signal_polarity(1); |
46 | } | |
47 | ||
37ac60e4 | 48 | int omapdss_sdi_display_enable(struct omap_dss_device *dssdev) |
23c0a7a6 TV |
49 | { |
50 | struct omap_video_timings *t = &dssdev->panel.timings; | |
51 | struct dss_clock_info dss_cinfo; | |
52 | struct dispc_clock_info dispc_cinfo; | |
53 | u16 lck_div, pck_div; | |
54 | unsigned long fck; | |
55 | unsigned long pck; | |
56 | int r; | |
57 | ||
05e1d606 TV |
58 | if (dssdev->manager == NULL) { |
59 | DSSERR("failed to enable display: no manager\n"); | |
60 | return -ENODEV; | |
61 | } | |
62 | ||
23c0a7a6 TV |
63 | r = omap_dss_start_device(dssdev); |
64 | if (r) { | |
65 | DSSERR("failed to start device\n"); | |
4fbafaf3 | 66 | goto err_start_dev; |
23c0a7a6 TV |
67 | } |
68 | ||
508886cf RQ |
69 | r = regulator_enable(sdi.vdds_sdi_reg); |
70 | if (r) | |
4fbafaf3 | 71 | goto err_reg_enable; |
508886cf | 72 | |
4fbafaf3 TV |
73 | r = dss_runtime_get(); |
74 | if (r) | |
75 | goto err_get_dss; | |
76 | ||
77 | r = dispc_runtime_get(); | |
78 | if (r) | |
79 | goto err_get_dispc; | |
23c0a7a6 | 80 | |
64ba4f74 | 81 | sdi_basic_init(dssdev); |
23c0a7a6 TV |
82 | |
83 | /* 15.5.9.1.2 */ | |
84 | dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF; | |
85 | ||
ff1b2cde SS |
86 | dispc_set_pol_freq(dssdev->manager->id, dssdev->panel.config, |
87 | dssdev->panel.acbi, dssdev->panel.acb); | |
23c0a7a6 | 88 | |
42c9dee8 TV |
89 | r = dss_calc_clock_div(1, t->pixel_clock * 1000, |
90 | &dss_cinfo, &dispc_cinfo); | |
23c0a7a6 | 91 | if (r) |
4fbafaf3 | 92 | goto err_calc_clock_div; |
23c0a7a6 TV |
93 | |
94 | fck = dss_cinfo.fck; | |
95 | lck_div = dispc_cinfo.lck_div; | |
96 | pck_div = dispc_cinfo.pck_div; | |
97 | ||
98 | pck = fck / lck_div / pck_div / 1000; | |
99 | ||
100 | if (pck != t->pixel_clock) { | |
101 | DSSWARN("Could not find exact pixel clock. Requested %d kHz, " | |
102 | "got %lu kHz\n", | |
103 | t->pixel_clock, pck); | |
104 | ||
105 | t->pixel_clock = pck; | |
106 | } | |
107 | ||
108 | ||
64ba4f74 | 109 | dispc_set_lcd_timings(dssdev->manager->id, t); |
23c0a7a6 TV |
110 | |
111 | r = dss_set_clock_div(&dss_cinfo); | |
112 | if (r) | |
4fbafaf3 | 113 | goto err_set_dss_clock_div; |
23c0a7a6 | 114 | |
ff1b2cde | 115 | r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo); |
23c0a7a6 | 116 | if (r) |
4fbafaf3 | 117 | goto err_set_dispc_clock_div; |
23c0a7a6 | 118 | |
42c9dee8 TV |
119 | dss_sdi_init(dssdev->phy.sdi.datapairs); |
120 | r = dss_sdi_enable(); | |
121 | if (r) | |
4fbafaf3 | 122 | goto err_sdi_enable; |
42c9dee8 | 123 | mdelay(2); |
23c0a7a6 | 124 | |
a2faee84 | 125 | dssdev->manager->enable(dssdev->manager); |
23c0a7a6 | 126 | |
23c0a7a6 | 127 | return 0; |
4fbafaf3 TV |
128 | |
129 | err_sdi_enable: | |
130 | err_set_dispc_clock_div: | |
131 | err_set_dss_clock_div: | |
132 | err_calc_clock_div: | |
133 | dispc_runtime_put(); | |
134 | err_get_dispc: | |
135 | dss_runtime_put(); | |
136 | err_get_dss: | |
508886cf | 137 | regulator_disable(sdi.vdds_sdi_reg); |
4fbafaf3 | 138 | err_reg_enable: |
23c0a7a6 | 139 | omap_dss_stop_device(dssdev); |
4fbafaf3 | 140 | err_start_dev: |
23c0a7a6 TV |
141 | return r; |
142 | } | |
37ac60e4 | 143 | EXPORT_SYMBOL(omapdss_sdi_display_enable); |
23c0a7a6 | 144 | |
37ac60e4 | 145 | void omapdss_sdi_display_disable(struct omap_dss_device *dssdev) |
23c0a7a6 | 146 | { |
a2faee84 | 147 | dssdev->manager->disable(dssdev->manager); |
23c0a7a6 TV |
148 | |
149 | dss_sdi_disable(); | |
150 | ||
4fbafaf3 TV |
151 | dispc_runtime_put(); |
152 | dss_runtime_put(); | |
23c0a7a6 | 153 | |
508886cf RQ |
154 | regulator_disable(sdi.vdds_sdi_reg); |
155 | ||
23c0a7a6 TV |
156 | omap_dss_stop_device(dssdev); |
157 | } | |
37ac60e4 | 158 | EXPORT_SYMBOL(omapdss_sdi_display_disable); |
23c0a7a6 | 159 | |
23c0a7a6 TV |
160 | int sdi_init_display(struct omap_dss_device *dssdev) |
161 | { | |
162 | DSSDBG("SDI init\n"); | |
163 | ||
5f42f2ce TV |
164 | if (sdi.vdds_sdi_reg == NULL) { |
165 | struct regulator *vdds_sdi; | |
166 | ||
167 | vdds_sdi = dss_get_vdds_sdi(); | |
168 | ||
169 | if (IS_ERR(vdds_sdi)) { | |
170 | DSSERR("can't get VDDS_SDI regulator\n"); | |
171 | return PTR_ERR(vdds_sdi); | |
172 | } | |
173 | ||
174 | sdi.vdds_sdi_reg = vdds_sdi; | |
175 | } | |
176 | ||
23c0a7a6 TV |
177 | return 0; |
178 | } | |
179 | ||
42c9dee8 | 180 | int sdi_init(void) |
23c0a7a6 | 181 | { |
23c0a7a6 TV |
182 | return 0; |
183 | } | |
184 | ||
185 | void sdi_exit(void) | |
186 | { | |
187 | } |