From: Sung-huai Wang danny.wang@amd.com
[ Upstream commit 239b31bd5c3fef3698440bf6436b2068c6bb08a3 ]
[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 Signed-off-by: Sasha Levin sashal@kernel.org --- .../dc/link/protocols/link_dp_irq_handler.c | 25 ++++++++++++------- 1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c index 0fcf0b8530acf..659b8064d3618 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c @@ -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)