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drm/amd/display: blank dp stream before re-train the link

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[Why]
When link loss happened, monitor can not light up if only re-train the
link.

[How]
Blank all the DP streams on this link before re-train the link, and then
unblank the stream

Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xiaodong Yan 2020-04-09 17:37:40 +08:00 committed by Alex Deucher
parent 933fe2cbf2
commit 718a5569b6
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -2908,6 +2908,12 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
sizeof(hpd_irq_dpcd_data),
"Status: ");
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)
link->dc->hwss.blank_stream(pipe_ctx);
}
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)
@ -2927,6 +2933,12 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
dc_link_reallocate_mst_payload(link);
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link)
link->dc->hwss.unblank_stream(pipe_ctx, &previous_link_settings);
}
status = false;
if (out_link_loss)
*out_link_loss = true;