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
 20int 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->bridge = of_drm_find_bridge(remote_node);
 34	out->panel = of_drm_find_panel(remote_node);
 35	if (IS_ERR(out->panel))
 36		out->panel = NULL;
 37
 38	of_node_put(remote_node);
 39
 40	if (out->panel) {
 41		struct drm_bridge *bridge;
 42
 43		bridge = drm_panel_bridge_add(out->panel);
 44		if (IS_ERR(bridge)) {
 45			dev_err(out->dev,
 46				"unable to create panel bridge (%ld)\n",
 47				PTR_ERR(bridge));
 48			ret = PTR_ERR(bridge);
 49			goto error;
 50		}
 51
 52		out->bridge = bridge;
 53	}
 54
 55	if (local_bridge) {
 56		if (!out->bridge) {
 57			ret = -EPROBE_DEFER;
 58			goto error;
 59		}
 60
 61		out->next_bridge = out->bridge;
 62		out->bridge = local_bridge;
 63	}
 64
 65	if (!out->bridge) {
 66		ret = -EPROBE_DEFER;
 67		goto error;
 68	}
 69
 70	return 0;
 71
 72error:
 73	omapdss_device_cleanup_output(out);
 74	return ret;
 75}
 76
 77void omapdss_device_cleanup_output(struct omap_dss_device *out)
 78{
 79	if (out->bridge && out->panel)
 80		drm_panel_bridge_remove(out->next_bridge ?
 81					out->next_bridge : out->bridge);
 82}
 83
 84void dss_mgr_set_timings(struct omap_dss_device *dssdev,
 85			 const struct videomode *vm)
 86{
 87	omap_crtc_dss_set_timings(dssdev->dss->mgr_ops_priv,
 88					  dssdev->dispc_channel, vm);
 89}
 90
 91void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
 92		const struct dss_lcd_mgr_config *config)
 93{
 94	omap_crtc_dss_set_lcd_config(dssdev->dss->mgr_ops_priv,
 95					     dssdev->dispc_channel, config);
 96}
 97
 98int dss_mgr_enable(struct omap_dss_device *dssdev)
 99{
100	return omap_crtc_dss_enable(dssdev->dss->mgr_ops_priv,
101					    dssdev->dispc_channel);
102}
103
104void dss_mgr_disable(struct omap_dss_device *dssdev)
105{
106	omap_crtc_dss_disable(dssdev->dss->mgr_ops_priv,
107				      dssdev->dispc_channel);
108}
109
110void dss_mgr_start_update(struct omap_dss_device *dssdev)
111{
112	omap_crtc_dss_start_update(dssdev->dss->mgr_ops_priv,
113					   dssdev->dispc_channel);
114}
115
116int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
117		void (*handler)(void *), void *data)
118{
119	struct dss_device *dss = dssdev->dss;
120
121	return omap_crtc_dss_register_framedone(dss->mgr_ops_priv,
122							dssdev->dispc_channel,
123							handler, data);
124}
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	omap_crtc_dss_unregister_framedone(dss->mgr_ops_priv,
132						   dssdev->dispc_channel,
133						   handler, data);
134}