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drm/amd/display: Support for DMUB HPD and HPD RX interrupt handling

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[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>
This commit is contained in:
Meenakshikumar Somasundaram
2021-01-27 01:05:28 -05:00
committed by Alex Deucher
parent 9fa0fb7713
commit 892b74a646
5 changed files with 45 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@@ -3656,6 +3656,26 @@ bool dc_process_dmub_aux_transfer_async(struct dc *dc,
return true;
}
uint8_t get_link_index_from_dpia_port_index(const struct dc *dc,
uint8_t dpia_port_index)
{
uint8_t index, link_index = 0xFF;
for (index = 0; index < dc->link_count; index++) {
/* ddc_hw_inst has dpia port index for dpia links
* and ddc instance for legacy links
*/
if (!dc->links[index]->ddc->ddc_pin) {
if (dc->links[index]->ddc_hw_inst == dpia_port_index) {
link_index = index;
break;
}
}
}
ASSERT(link_index != 0xFF);
return link_index;
}
/**
* dc_disable_accelerated_mode - disable accelerated mode
* @dc: dc structure

7
drivers/gpu/drm/amd/display/dc/core/dc_stat.c
View File

@@ -61,6 +61,13 @@ void dc_stat_get_dmub_notification(const struct dc *dc, struct dmub_notification
status = dmub_srv_stat_get_notification(dmub, notify);
ASSERT(status == DMUB_STATUS_OK);
/* For HPD/HPD RX, convert dpia port index into link index */
if (notify->type == DMUB_NOTIFICATION_HPD ||
notify->type == DMUB_NOTIFICATION_HPD_IRQ) {
notify->link_index =
get_link_index_from_dpia_port_index(dc, notify->link_index);
}
}
/**

3
drivers/gpu/drm/amd/display/dc/dc.h
View File

@@ -1394,6 +1394,9 @@ bool dc_process_dmub_aux_transfer_async(struct dc *dc,
uint32_t link_index,
struct aux_payload *payload);
/* Get dc link index from dpia port index */
uint8_t get_link_index_from_dpia_port_index(const struct dc *dc,
uint8_t dpia_port_index);
/*******************************************************************************
* DSC Interfaces
******************************************************************************/

4
drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
View File

@@ -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)

11
drivers/gpu/drm/amd/display/dmub/src/dmub_srv_stat.c
View File

@@ -76,6 +76,17 @@ enum dmub_status dmub_srv_stat_get_notification(struct dmub_srv *dmub,
dmub_memcpy((void *)&notify->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;