From 892b74a646bb5f9bc386c40c818d2305c7496bfa Mon Sep 17 00:00:00 2001
From: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Date: Wed, 27 Jan 2021 01:05:28 -0500
Subject: drm/amd/display: Support for DMUB HPD and HPD RX interrupt handling
[WHY]
To add support for HPD & HPD RX interrupt handling for USB4 DPIA in
YELLOW_CARP_B0. USB4 DPIA HPD & HPD RX interrupts are issued from DMUB to
driver as a outbox1 message.
[HOW]
1) Created get_link_index_from_dpia_port_index() to retrieve link index
from dpia port index for HPD & HPD RX dmub notifications.
2) Added DMUB HPD & HPD RX handling in dmub_srv_stat_get_notification().
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h | 4 ++++
drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c | 11 +++++++++++
2 files changed, 15 insertions(+)
(limited to 'drivers/gpu/drm/amd/display/dmub')
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index f4e3589d6067..81326f399eec 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -675,6 +675,10 @@ enum dmub_out_cmd_type {
* Command type used for DP AUX Reply data notification
*/
DMUB_OUT_CMD__DP_AUX_REPLY = 1,
+ /**
+ * Command type used for DP HPD event notification
+ */
+ DMUB_OUT_CMD__DP_HPD_NOTIFY = 2,
};
#pragma pack(push, 1)
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c
index 70766d534c9c..d7f66e5285c0 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c
@@ -76,6 +76,17 @@ enum dmub_status dmub_srv_stat_get_notification(struct dmub_srv *dmub,
dmub_memcpy((void *)¬ify->aux_reply,
(void *)&cmd.dp_aux_reply.reply_data, sizeof(struct aux_reply_data));
break;
+ case DMUB_OUT_CMD__DP_HPD_NOTIFY:
+ if (cmd.dp_hpd_notify.hpd_data.hpd_type == DP_HPD) {
+ notify->type = DMUB_NOTIFICATION_HPD;
+ notify->hpd_status = cmd.dp_hpd_notify.hpd_data.hpd_status;
+ } else {
+ notify->type = DMUB_NOTIFICATION_HPD_IRQ;
+ }
+
+ notify->link_index = cmd.dp_hpd_notify.hpd_data.instance;
+ notify->result = AUX_RET_SUCCESS;
+ break;
default:
notify->type = DMUB_NOTIFICATION_NO_DATA;
break;
--
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