drm/amd/display: Don't optimize bandwidth before disabling planes

[Why]
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.

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

Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index bbf088a..7f9fc22 100644 (file)
--- 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)
                                                pipe_ctx->stream_res.audio->funcs->az_disable(pipe_ctx->stream_res.audio);
 
-                                       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);