[PATCH 09/13] drm/amd/display: Don't optimize bandwidth before disabling planes

Bindu Ramamurthy bindu.r at amd.com
Fri Feb 19 22:16:08 UTC 2021

From: Aric Cyr <aric.cyr at amd.com>

There is a window of time where we optimize bandwidth due to no streams
enabled will enable PSTATE changing but HUBPs are not disabled yet.
This results in underflow counter increasing in some hotplug scenarios.

Set the optimize-bandwidth flag for later processing once all the HUBPs
are properly disabled.

Signed-off-by: Aric Cyr <aric.cyr at amd.com>
Acked-by: Bindu Ramamurthy <bindu.r at amd.com>
 drivers/gpu/drm/amd/display/dc/core/dc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 39df5d2c0108..4df26a67e570 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2413,7 +2413,8 @@ static void commit_planes_do_stream_update(struct dc *dc,
 					if (pipe_ctx->stream_res.audio && !dc->debug.az_endpoint_mute_only)
-					dc->hwss.optimize_bandwidth(dc, dc->current_state);
+					dc->optimized_required = true;
 				} else {
 					if (get_seamless_boot_stream_count(context) == 0)
 						dc->hwss.prepare_bandwidth(dc, dc->current_state);

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