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drm/amd/display: Handle HPD_IRQ for internal link 

[Why]
TCON data is corrupted after electro static discharge test.
Once the TCON data get corrupted, they will get themselves
reset and send HPD_IRQ to source side.

[How]
Support HPD_IRQ for internal link, and restore the PSR/Replay setup.

Reviewed-by: Robin Chen <robin.chen@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Sung-huai Wang <danny.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
pull/914/head
Sung-huai Wang 2024-04-10 14:40:32 +08:00 committed by Alex Deucher
parent d0f2181d65
commit 239b31bd5c
1 changed files with 16 additions and 9 deletions
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25
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
View File

@ -373,6 +373,7 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
union device_service_irq device_service_clear = {0};
enum dc_status result;
bool status = false;
bool allow_active = false;
if (out_link_loss)
*out_link_loss = false;
@ -427,12 +428,6 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
return false;
}
if (handle_hpd_irq_psr_sink(link))
/* PSR-related error was detected and handled */
return true;
handle_hpd_irq_replay_sink(link);
/* If PSR-related error handled, Main link may be off,
* so do not handle as a normal sink status change interrupt.
*/
@ -454,9 +449,8 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
* If we got sink count changed it means
* Downstream port status changed,
* then DM should call DC to do the detection.
* NOTE: Do not handle link loss on eDP since it is internal link*/
if ((link->connector_signal != SIGNAL_TYPE_EDP) &&
dp_parse_link_loss_status(
*/
if (dp_parse_link_loss_status(
link,
&hpd_irq_dpcd_data)) {
/* Connectivity log: link loss */
@ -465,6 +459,11 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
sizeof(hpd_irq_dpcd_data),
"Status: ");
if (link->psr_settings.psr_feature_enabled)
edp_set_psr_allow_active(link, &allow_active, true, false, NULL);
else if (link->replay_settings.replay_allow_active)
edp_set_replay_allow_active(link, &allow_active, true, false, NULL);
if (defer_handling && has_left_work)
*has_left_work = true;
else
@ -477,6 +476,14 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link,
dp_trace_link_loss_increment(link);
}
if (*out_link_loss == false) {
if (handle_hpd_irq_psr_sink(link))
/* PSR-related error was detected and handled */
return true;
handle_hpd_irq_replay_sink(link);
}
if (link->type == dc_connection_sst_branch &&
hpd_irq_dpcd_data.bytes.sink_cnt.bits.SINK_COUNT
!= link->dpcd_sink_count)