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disp: msm: dp: add dp aux bridge framework support

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Create the framework to support external dp aux bridge device which
can handle DPCD/I2C/HPD from external.

Change-Id: Iabd0998efc8bf7134d186b1751d219c00217385c
Signed-off-by: Xiaowen Wu <wxiaowen@codeaurora.org>
Signed-off-by: Karim Henain <khenain@codeaurora.org>
Signed-off-by: Sudarsan Ramesh <sudarame@codeaurora.org>
This commit is contained in:
Xiaowen Wu
2019-10-29 17:00:49 -04:00
committed by Sudarsan Ramesh
parent b1120f3470
commit bdf97a004b
10 changed files with 567 additions and 13 deletions
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19
msm/dp/dp_hpd.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
*/
#include <linux/slab.h>
@@ -14,6 +14,7 @@
#include "dp_gpio_hpd.h"
#include "dp_lphw_hpd.h"
#include "dp_debug.h"
#include "dp_bridge_hpd.h"
static void dp_hpd_host_init(struct dp_hpd *dp_hpd,
struct dp_catalog_hpd *catalog)
@@ -40,11 +41,20 @@ static void dp_hpd_isr(struct dp_hpd *dp_hpd)
}
struct dp_hpd *dp_hpd_get(struct device *dev, struct dp_parser *parser,
struct dp_catalog_hpd *catalog, struct dp_hpd_cb *cb)
struct dp_catalog_hpd *catalog,
struct dp_aux_bridge *aux_bridge,
struct dp_hpd_cb *cb)
{
struct dp_hpd *dp_hpd;
if (parser->no_aux_switch && parser->lphw_hpd) {
if (aux_bridge && (aux_bridge->flag & DP_AUX_BRIDGE_HPD)) {
dp_hpd = dp_bridge_hpd_get(dev, cb, aux_bridge);
if (IS_ERR(dp_hpd)) {
pr_err("failed to get bridge hpd\n");
return dp_hpd;
}
dp_hpd->type = DP_HPD_BRIDGE;
} else if (parser->no_aux_switch && parser->lphw_hpd) {
dp_hpd = dp_lphw_hpd_get(dev, parser, catalog, cb);
if (IS_ERR_OR_NULL(dp_hpd)) {
DP_ERR("failed to get lphw hpd\n");
@@ -104,6 +114,9 @@ void dp_hpd_put(struct dp_hpd *dp_hpd)
case DP_HPD_LPHW:
dp_lphw_hpd_put(dp_hpd);
break;
case DP_HPD_BRIDGE:
dp_bridge_hpd_put(dp_hpd);
break;
default:
DP_ERR("unknown hpd type %d\n", dp_hpd->type);
break;