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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Archit Taneja <archit@ti.com>
   5  */
   6
   7 #include <linux/bitops.h>
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/slab.h>
  12 #include <linux/of.h>
  13 #include <linux/of_graph.h>
  14
  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 {
  22         struct device_node *remote_node;
  23
  24         remote_node = of_graph_get_remote_node(out->dev->of_node,
  25                                                ffs(out->of_ports) - 1, 0);
  26         if (!remote_node) {
  27                 dev_dbg(out->dev, "failed to find video sink\n");
  28                 return 0;
  29         }
  30
  31         out->next = omapdss_find_device_by_node(remote_node);
  32         out->bridge = of_drm_find_bridge(remote_node);
  33         out->panel = of_drm_find_panel(remote_node);
  34         if (IS_ERR(out->panel))
  35                 out->panel = NULL;
  36
  37         of_node_put(remote_node);
  38
  39         if (out->next && out->type != out->next->type) {
  40                 dev_err(out->dev, "output type and display type don't match\n");
  41                 omapdss_device_put(out->next);
  42                 out->next = NULL;
  43                 return -EINVAL;
  44         }
  45
  46         return out->next || out->bridge || out->panel ? 0 : -EPROBE_DEFER;
  47 }
  48 EXPORT_SYMBOL(omapdss_device_init_output);
  49
  50 void omapdss_device_cleanup_output(struct omap_dss_device *out)
  51 {
  52         if (out->next)
  53                 omapdss_device_put(out->next);
  54 }
  55 EXPORT_SYMBOL(omapdss_device_cleanup_output);
  56
  57 int dss_install_mgr_ops(struct dss_device *dss,
  58                         const struct dss_mgr_ops *mgr_ops,
  59                         struct omap_drm_private *priv)
  60 {
  61         if (dss->mgr_ops)
  62                 return -EBUSY;
  63
  64         dss->mgr_ops = mgr_ops;
  65         dss->mgr_ops_priv = priv;
  66
  67         return 0;
  68 }
  69 EXPORT_SYMBOL(dss_install_mgr_ops);
  70
  71 void dss_uninstall_mgr_ops(struct dss_device *dss)
  72 {
  73         dss->mgr_ops = NULL;
  74         dss->mgr_ops_priv = NULL;
  75 }
  76 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
  77
  78 void dss_mgr_set_timings(struct omap_dss_device *dssdev,
  79                          const struct videomode *vm)
  80 {
  81         dssdev->dss->mgr_ops->set_timings(dssdev->dss->mgr_ops_priv,
  82                                           dssdev->dispc_channel, vm);
  83 }
  84 EXPORT_SYMBOL(dss_mgr_set_timings);
  85
  86 void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
  87                 const struct dss_lcd_mgr_config *config)
  88 {
  89         dssdev->dss->mgr_ops->set_lcd_config(dssdev->dss->mgr_ops_priv,
  90                                              dssdev->dispc_channel, config);
  91 }
  92 EXPORT_SYMBOL(dss_mgr_set_lcd_config);
  93
  94 int dss_mgr_enable(struct omap_dss_device *dssdev)
  95 {
  96         return dssdev->dss->mgr_ops->enable(dssdev->dss->mgr_ops_priv,
  97                                             dssdev->dispc_channel);
  98 }
  99 EXPORT_SYMBOL(dss_mgr_enable);
 100
 101 void dss_mgr_disable(struct omap_dss_device *dssdev)
 102 {
 103         dssdev->dss->mgr_ops->disable(dssdev->dss->mgr_ops_priv,
 104                                       dssdev->dispc_channel);
 105 }
 106 EXPORT_SYMBOL(dss_mgr_disable);
 107
 108 void dss_mgr_start_update(struct omap_dss_device *dssdev)
 109 {
 110         dssdev->dss->mgr_ops->start_update(dssdev->dss->mgr_ops_priv,
 111                                            dssdev->dispc_channel);
 112 }
 113 EXPORT_SYMBOL(dss_mgr_start_update);
 114
 115 int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
 116                 void (*handler)(void *), void *data)
 117 {
 118         struct dss_device *dss = dssdev->dss;
 119
 120         return dss->mgr_ops->register_framedone_handler(dss->mgr_ops_priv,
 121                                                         dssdev->dispc_channel,
 122                                                         handler, data);
 123 }
 124 EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
 125
 126 void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
 127                 void (*handler)(void *), void *data)
 128 {
 129         struct dss_device *dss = dssdev->dss;
 130
 131         dss->mgr_ops->unregister_framedone_handler(dss->mgr_ops_priv,
 132                                                    dssdev->dispc_channel,
 133                                                    handler, data);
 134 }
 135 EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);