1/*
  2 * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
  3 *
  4 * This program is free software; you can redistribute it and/or modify
  5 * it under the terms of the GNU General Public License version 2 and
  6 * only version 2 as published by the Free Software Foundation.
  7 *
  8 * This program is distributed in the hope that it will be useful,
  9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11 * GNU General Public License for more details.
 12 */
 13
 14#include "edp.h"
 15
 16struct edp_bridge {
 17	struct drm_bridge base;
 18	struct msm_edp *edp;
 19};
 20#define to_edp_bridge(x) container_of(x, struct edp_bridge, base)
 21
 22void edp_bridge_destroy(struct drm_bridge *bridge)
 23{
 24}
 25
 26static void edp_bridge_pre_enable(struct drm_bridge *bridge)
 27{
 28	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 29	struct msm_edp *edp = edp_bridge->edp;
 30
 31	DBG("");
 32	msm_edp_ctrl_power(edp->ctrl, true);
 33}
 34
 35static void edp_bridge_enable(struct drm_bridge *bridge)
 36{
 37	DBG("");
 38}
 39
 40static void edp_bridge_disable(struct drm_bridge *bridge)
 41{
 42	DBG("");
 43}
 44
 45static void edp_bridge_post_disable(struct drm_bridge *bridge)
 46{
 47	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 48	struct msm_edp *edp = edp_bridge->edp;
 49
 50	DBG("");
 51	msm_edp_ctrl_power(edp->ctrl, false);
 52}
 53
 54static void edp_bridge_mode_set(struct drm_bridge *bridge,
 55		struct drm_display_mode *mode,
 56		struct drm_display_mode *adjusted_mode)
 57{
 58	struct drm_device *dev = bridge->dev;
 59	struct drm_connector *connector;
 60	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 61	struct msm_edp *edp = edp_bridge->edp;
 62
 63	DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
 64			mode->base.id, mode->name,
 65			mode->vrefresh, mode->clock,
 66			mode->hdisplay, mode->hsync_start,
 67			mode->hsync_end, mode->htotal,
 68			mode->vdisplay, mode->vsync_start,
 69			mode->vsync_end, mode->vtotal,
 70			mode->type, mode->flags);
 71
 72	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 73		if ((connector->encoder != NULL) &&
 74			(connector->encoder->bridge == bridge)) {
 75			msm_edp_ctrl_timing_cfg(edp->ctrl,
 76				adjusted_mode, &connector->display_info);
 77			break;
 78		}
 79	}
 80}
 81
 82static const struct drm_bridge_funcs edp_bridge_funcs = {
 83	.pre_enable = edp_bridge_pre_enable,
 84	.enable = edp_bridge_enable,
 85	.disable = edp_bridge_disable,
 86	.post_disable = edp_bridge_post_disable,
 87	.mode_set = edp_bridge_mode_set,
 88};
 89
 90/* initialize bridge */
 91struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp)
 92{
 93	struct drm_bridge *bridge = NULL;
 94	struct edp_bridge *edp_bridge;
 95	int ret;
 96
 97	edp_bridge = devm_kzalloc(edp->dev->dev,
 98			sizeof(*edp_bridge), GFP_KERNEL);
 99	if (!edp_bridge) {
100		ret = -ENOMEM;
101		goto fail;
102	}
103
104	edp_bridge->edp = edp;
105
106	bridge = &edp_bridge->base;
107	bridge->funcs = &edp_bridge_funcs;
108
109	ret = drm_bridge_attach(edp->dev, bridge);
110	if (ret)
111		goto fail;
112
113	return bridge;
114
115fail:
116	if (bridge)
117		edp_bridge_destroy(bridge);
118
119	return ERR_PTR(ret);
120}