arch/arm/mach-omap2/display.c

   1 /*
   2  * OMAP2plus display device setup / initialization.
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   5  *      Senthilvadivu Guruswamy
   6  *      Sumit Semwal
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether express or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/string.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/io.h>
  23 #include <linux/clk.h>
  24 #include <linux/err.h>
  25
  26 #include <video/omapdss.h>
  27 #include <plat/omap_hwmod.h>
  28 #include <plat/omap_device.h>
  29 #include <plat/omap-pm.h>
  30
  31 static struct platform_device omap_display_device = {
  32         .name          = "omapdss",
  33         .id            = -1,
  34         .dev            = {
  35                 .platform_data = NULL,
  36         },
  37 };
  38
  39 static struct omap_device_pm_latency omap_dss_latency[] = {
  40         [0] = {
  41                 .deactivate_func        = omap_device_idle_hwmods,
  42                 .activate_func          = omap_device_enable_hwmods,
  43                 .flags                  = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
  44         },
  45 };
  46
  47 struct omap_dss_hwmod_data {
  48         const char *oh_name;
  49         const char *dev_name;
  50         const int id;
  51 };
  52
  53 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = {
  54         { "dss_core", "omapdss_dss", -1 },
  55         { "dss_dispc", "omapdss_dispc", -1 },
  56         { "dss_rfbi", "omapdss_rfbi", -1 },
  57         { "dss_venc", "omapdss_venc", -1 },
  58 };
  59
  60 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = {
  61         { "dss_core", "omapdss_dss", -1 },
  62         { "dss_dispc", "omapdss_dispc", -1 },
  63         { "dss_rfbi", "omapdss_rfbi", -1 },
  64         { "dss_venc", "omapdss_venc", -1 },
  65         { "dss_dsi1", "omapdss_dsi1", -1 },
  66 };
  67
  68 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
  69         { "dss_core", "omapdss_dss", -1 },
  70         { "dss_dispc", "omapdss_dispc", -1 },
  71         { "dss_rfbi", "omapdss_rfbi", -1 },
  72         { "dss_venc", "omapdss_venc", -1 },
  73         { "dss_dsi1", "omapdss_dsi1", -1 },
  74         { "dss_dsi2", "omapdss_dsi2", -1 },
  75         { "dss_hdmi", "omapdss_hdmi", -1 },
  76 };
  77
  78 int __init omap_display_init(struct omap_dss_board_info *board_data)
  79 {
  80         int r = 0;
  81         struct omap_hwmod *oh;
  82         struct omap_device *od;
  83         int i, oh_count;
  84         struct omap_display_platform_data pdata;
  85         const struct omap_dss_hwmod_data *curr_dss_hwmod;
  86
  87         memset(&pdata, 0, sizeof(pdata));
  88
  89         if (cpu_is_omap24xx()) {
  90                 curr_dss_hwmod = omap2_dss_hwmod_data;
  91                 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
  92         } else if (cpu_is_omap34xx()) {
  93                 curr_dss_hwmod = omap3_dss_hwmod_data;
  94                 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
  95         } else {
  96                 curr_dss_hwmod = omap4_dss_hwmod_data;
  97                 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
  98         }
  99
 100         pdata.board_data = board_data;
 101         pdata.board_data->get_context_loss_count =
 102                 omap_pm_get_dev_context_loss_count;
 103
 104         for (i = 0; i < oh_count; i++) {
 105                 oh = omap_hwmod_lookup(curr_dss_hwmod[i].oh_name);
 106                 if (!oh) {
 107                         pr_err("Could not look up %s\n",
 108                                 curr_dss_hwmod[i].oh_name);
 109                         return -ENODEV;
 110                 }
 111
 112                 od = omap_device_build(curr_dss_hwmod[i].dev_name,
 113                                 curr_dss_hwmod[i].id, oh, &pdata,
 114                                 sizeof(struct omap_display_platform_data),
 115                                 omap_dss_latency,
 116                                 ARRAY_SIZE(omap_dss_latency), 0);
 117
 118                 if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
 119                                 curr_dss_hwmod[i].oh_name))
 120                         return -ENODEV;
 121         }
 122         omap_display_device.dev.platform_data = board_data;
 123
 124         r = platform_device_register(&omap_display_device);
 125         if (r < 0)
 126                 printk(KERN_ERR "Unable to register OMAP-Display device\n");
 127
 128         return r;
 129 }