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drm/amd/display: Add signal type check when verify stream backends same
[Why] For allow eDP hot-plug feature, the stream signal may change to VIRTUAL when plug-out and back to eDP when plug-in. OS will still setPathMode with same timing for each plugging, but eDP gets no stream update as we don't check signal type changing back as keeping it VIRTUAL. It's also unsafe for future cases that stream signal is switched with same timing. [How] Check stream signal type change include previous HDMI signal case. Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> Acked-by: Wayne Lin <wayne.lin@amd.com> Signed-off-by: Dale Zhao <dale.zhao@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -1640,6 +1640,9 @@ static bool are_stream_backends_same(
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if (is_timing_changed(stream_a, stream_b))
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return false;
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if (stream_a->signal != stream_b->signal)
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return false;
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if (stream_a->dpms_off != stream_b->dpms_off)
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return false;
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