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
 20int 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}
 48EXPORT_SYMBOL(omapdss_device_init_output);
 49
 50void omapdss_device_cleanup_output(struct omap_dss_device *out)
 51{
 52	if (out->next)
 53		omapdss_device_put(out->next);
 54}
 55EXPORT_SYMBOL(omapdss_device_cleanup_output);
 56
 57int 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}
 69EXPORT_SYMBOL(dss_install_mgr_ops);
 70
 71void dss_uninstall_mgr_ops(struct dss_device *dss)
 72{
 73	dss->mgr_ops = NULL;
 74	dss->mgr_ops_priv = NULL;
 75}
 76EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 77
 78void 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}
 84EXPORT_SYMBOL(dss_mgr_set_timings);
 85
 86void 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}
 92EXPORT_SYMBOL(dss_mgr_set_lcd_config);
 93
 94int 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}
 99EXPORT_SYMBOL(dss_mgr_enable);
100
101void 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}
106EXPORT_SYMBOL(dss_mgr_disable);
107
108void 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}
113EXPORT_SYMBOL(dss_mgr_start_update);
114
115int 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}
124EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
125
126void 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}
135EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);