drivers/gpu/drm/omapdrm/dss/output.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
   4  * Author: Archit Taneja <archit@ti.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/slab.h>
  11 #include <linux/of.h>
  12 #include <linux/of_graph.h>
  13
  14 #include <drm/drm_bridge.h>
  15 #include <drm/drm_panel.h>
  16
  17 #include "dss.h"
  18 #include "omapdss.h"
  19
  20 int omapdss_device_init_output(struct omap_dss_device *out,
  21                                struct drm_bridge *local_bridge)
  22 {
  23         struct device_node *remote_node;
  24         int ret;
  25
  26         remote_node = of_graph_get_remote_node(out->dev->of_node,
  27                                                out->of_port, 0);
  28         if (!remote_node) {
  29                 dev_dbg(out->dev, "failed to find video sink\n");
  30                 return 0;
  31         }
  32
  33         out->next = omapdss_find_device_by_node(remote_node);
  34         out->bridge = of_drm_find_bridge(remote_node);
  35         out->panel = of_drm_find_panel(remote_node);
  36         if (IS_ERR(out->panel))
  37                 out->panel = NULL;
  38
  39         of_node_put(remote_node);
  40
  41         if (out->next && out->type != out->next->type) {
  42                 dev_err(out->dev, "output type and display type don't match\n");
  43                 ret = -EINVAL;
  44                 goto error;
  45         }
  46
  47         if (out->panel) {
  48                 struct drm_bridge *bridge;
  49
  50                 bridge = drm_panel_bridge_add(out->panel);
  51                 if (IS_ERR(bridge)) {
  52                         dev_err(out->dev,
  53                                 "unable to create panel bridge (%ld)\n",
  54                                 PTR_ERR(bridge));
  55                         ret = PTR_ERR(bridge);
  56                         goto error;
  57                 }
  58
  59                 out->bridge = bridge;
  60         }
  61
  62         if (local_bridge) {
  63                 if (!out->bridge) {
  64                         ret = -EPROBE_DEFER;
  65                         goto error;
  66                 }
  67
  68                 out->next_bridge = out->bridge;
  69                 out->bridge = local_bridge;
  70         }
  71
  72         if (!out->next && !out->bridge) {
  73                 ret = -EPROBE_DEFER;
  74                 goto error;
  75         }
  76
  77         return 0;
  78
  79 error:
  80         omapdss_device_cleanup_output(out);
  81         out->next = NULL;
  82         return ret;
  83 }
  84 EXPORT_SYMBOL(omapdss_device_init_output);
  85
  86 void omapdss_device_cleanup_output(struct omap_dss_device *out)
  87 {
  88         if (out->bridge && out->panel)
  89                 drm_panel_bridge_remove(out->next_bridge ?
  90                                         out->next_bridge : out->bridge);
  91
  92         if (out->next)
  93                 omapdss_device_put(out->next);
  94 }
  95 EXPORT_SYMBOL(omapdss_device_cleanup_output);
  96
  97 int dss_install_mgr_ops(struct dss_device *dss,
  98                         const struct dss_mgr_ops *mgr_ops,
  99                         struct omap_drm_private *priv)
 100 {
 101         if (dss->mgr_ops)
 102                 return -EBUSY;
 103
 104         dss->mgr_ops = mgr_ops;
 105         dss->mgr_ops_priv = priv;
 106
 107         return 0;
 108 }
 109 EXPORT_SYMBOL(dss_install_mgr_ops);
 110
 111 void dss_uninstall_mgr_ops(struct dss_device *dss)
 112 {
 113         dss->mgr_ops = NULL;
 114         dss->mgr_ops_priv = NULL;
 115 }
 116 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 117
 118 void dss_mgr_set_timings(struct omap_dss_device *dssdev,
 119                          const struct videomode *vm)
 120 {
 121         dssdev->dss->mgr_ops->set_timings(dssdev->dss->mgr_ops_priv,
 122                                           dssdev->dispc_channel, vm);
 123 }
 124 EXPORT_SYMBOL(dss_mgr_set_timings);
 125
 126 void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
 127                 const struct dss_lcd_mgr_config *config)
 128 {
 129         dssdev->dss->mgr_ops->set_lcd_config(dssdev->dss->mgr_ops_priv,
 130                                              dssdev->dispc_channel, config);
 131 }
 132 EXPORT_SYMBOL(dss_mgr_set_lcd_config);
 133
 134 int dss_mgr_enable(struct omap_dss_device *dssdev)
 135 {
 136         return dssdev->dss->mgr_ops->enable(dssdev->dss->mgr_ops_priv,
 137                                             dssdev->dispc_channel);
 138 }
 139 EXPORT_SYMBOL(dss_mgr_enable);
 140
 141 void dss_mgr_disable(struct omap_dss_device *dssdev)
 142 {
 143         dssdev->dss->mgr_ops->disable(dssdev->dss->mgr_ops_priv,
 144                                       dssdev->dispc_channel);
 145 }
 146 EXPORT_SYMBOL(dss_mgr_disable);
 147
 148 void dss_mgr_start_update(struct omap_dss_device *dssdev)
 149 {
 150         dssdev->dss->mgr_ops->start_update(dssdev->dss->mgr_ops_priv,
 151                                            dssdev->dispc_channel);
 152 }
 153 EXPORT_SYMBOL(dss_mgr_start_update);
 154
 155 int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
 156                 void (*handler)(void *), void *data)
 157 {
 158         struct dss_device *dss = dssdev->dss;
 159
 160         return dss->mgr_ops->register_framedone_handler(dss->mgr_ops_priv,
 161                                                         dssdev->dispc_channel,
 162                                                         handler, data);
 163 }
 164 EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
 165
 166 void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
 167                 void (*handler)(void *), void *data)
 168 {
 169         struct dss_device *dss = dssdev->dss;
 170
 171         dss->mgr_ops->unregister_framedone_handler(dss->mgr_ops_priv,
 172                                                    dssdev->dispc_channel,
 173                                                    handler, data);
 174 }
 175 EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);