1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
  4 */
  5
  6#include "edp.h"
  7
  8struct edp_bridge {
  9	struct drm_bridge base;
 10	struct msm_edp *edp;
 11};
 12#define to_edp_bridge(x) container_of(x, struct edp_bridge, base)
 13
 14void edp_bridge_destroy(struct drm_bridge *bridge)
 15{
 16}
 17
 18static void edp_bridge_pre_enable(struct drm_bridge *bridge)
 19{
 20	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 21	struct msm_edp *edp = edp_bridge->edp;
 22
 23	DBG("");
 24	msm_edp_ctrl_power(edp->ctrl, true);
 25}
 26
 27static void edp_bridge_enable(struct drm_bridge *bridge)
 28{
 29	DBG("");
 30}
 31
 32static void edp_bridge_disable(struct drm_bridge *bridge)
 33{
 34	DBG("");
 35}
 36
 37static void edp_bridge_post_disable(struct drm_bridge *bridge)
 38{
 39	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 40	struct msm_edp *edp = edp_bridge->edp;
 41
 42	DBG("");
 43	msm_edp_ctrl_power(edp->ctrl, false);
 44}
 45
 46static void edp_bridge_mode_set(struct drm_bridge *bridge,
 47		const struct drm_display_mode *mode,
 48		const struct drm_display_mode *adjusted_mode)
 49{
 50	struct drm_device *dev = bridge->dev;
 51	struct drm_connector *connector;
 52	struct edp_bridge *edp_bridge = to_edp_bridge(bridge);
 53	struct msm_edp *edp = edp_bridge->edp;
 54
 55	DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
 56
 57	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 58		struct drm_encoder *encoder = connector->encoder;
 59		struct drm_bridge *first_bridge;
 60
 61		if (!connector->encoder)
 62			continue;
 63
 64		first_bridge = drm_bridge_chain_get_first_bridge(encoder);
 65		if (bridge == first_bridge) {
 66			msm_edp_ctrl_timing_cfg(edp->ctrl,
 67				adjusted_mode, &connector->display_info);
 68			break;
 69		}
 70	}
 71}
 72
 73static const struct drm_bridge_funcs edp_bridge_funcs = {
 74	.pre_enable = edp_bridge_pre_enable,
 75	.enable = edp_bridge_enable,
 76	.disable = edp_bridge_disable,
 77	.post_disable = edp_bridge_post_disable,
 78	.mode_set = edp_bridge_mode_set,
 79};
 80
 81/* initialize bridge */
 82struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp)
 83{
 84	struct drm_bridge *bridge = NULL;
 85	struct edp_bridge *edp_bridge;
 86	int ret;
 87
 88	edp_bridge = devm_kzalloc(edp->dev->dev,
 89			sizeof(*edp_bridge), GFP_KERNEL);
 90	if (!edp_bridge) {
 91		ret = -ENOMEM;
 92		goto fail;
 93	}
 94
 95	edp_bridge->edp = edp;
 96
 97	bridge = &edp_bridge->base;
 98	bridge->funcs = &edp_bridge_funcs;
 99
100	ret = drm_bridge_attach(edp->encoder, bridge, NULL, 0);
101	if (ret)
102		goto fail;
103
104	return bridge;
105
106fail:
107	if (bridge)
108		edp_bridge_destroy(bridge);
109
110	return ERR_PTR(ret);
111}