drm/amd/display: Enable double buffer for OTG_BLANK

[Why]
Currently if seamless boot is enabled, we will skip double buffer enable
for OTG_BLANK. However, we need the double buffer enable in order to
block global sync signals when OTG becomes blanked (for PSR). Blocking
global sync signals prevent pipe from requesting data.

[How]
Move tg_init before seamless boot check.

Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 5347a85..f2127af 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1188,8 +1188,14 @@ void dcn10_init_pipes(struct dc *dc, struct dc_state *context)
                if (can_apply_seamless_boot &&
                        pipe_ctx->stream != NULL &&
                        pipe_ctx->stream_res.tg->funcs->is_tg_enabled(
-                               pipe_ctx->stream_res.tg))
+                               pipe_ctx->stream_res.tg)) {
+                       // Enable double buffering for OTG_BLANK no matter if
+                       // seamless boot is enabled or not to suppress global sync
+                       // signals when OTG blanked. This is to prevent pipe from
+                       // requesting data while in PSR.
+                       tg->funcs->tg_init(tg);
                        continue;
+               }
 
                /* Disable on the current state so the new one isn't cleared. */
                pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];