From: Xiaodong Yan <xiaodong....@amd.com>
[ Upstream commit 718a5569b6fa6e1f49f1ae76a3c18acb4ddb74f1 ]
[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....@amd.com>
Reviewed-by: Tony Cheng <tony.ch...@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.sique...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index fd9e69634c50a..1b6c75a4dd60a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2885,6 +2885,12 @@ 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)
@@ -2904,6 +2910,12 @@ 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;
--
2.20.1
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