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drm/amd/display: Emulate Display Hotplug Hang

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[WHY]
Driver reports 0 display when the virtual display is still present, and
causes P-state hang in FW.

[HOW]
When enumerating through streams, check for active planes and use that
to indicate number of displays.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Daniel Sa <Daniel.Sa@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Daniel Sa
2024-08-23 11:29:23 -04:00
committed by Alex Deucher
parent f588da30a2
commit d18a56b247
1 changed files with 2 additions and 7 deletions
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drivers/gpu/drm/amd/display/dc/clk_mgr/clk_mgr.c
+2 -7
View File
@@ -59,6 +59,7 @@ int clk_mgr_helper_get_active_display_cnt(
display_count = 0;
for (i = 0; i < context->stream_count; i++) {
const struct dc_stream_state *stream = context->streams[i];
const struct dc_stream_status *stream_status = &context->stream_status[i];
/* Don't count SubVP phantom pipes as part of active
* display count
@@ -66,13 +67,7 @@ int clk_mgr_helper_get_active_display_cnt(
if (dc_state_get_stream_subvp_type(context, stream) == SUBVP_PHANTOM)
continue;
/*
* Only notify active stream or virtual stream.
* Need to notify virtual stream to work around
* headless case. HPD does not fire when system is in
* S0i2.
*/
if (!stream->dpms_off || stream->signal == SIGNAL_TYPE_VIRTUAL)
if (!stream->dpms_off || (stream_status && stream_status->plane_count))
display_count++;
}