cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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output.c (3036B)

      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}