From: Vitaly Prosyak <vitaly.prosyak@amd.com>
Date: Fri, 19 Jul 2019 21:07:33 +0000 (-0500)
Subject: drm/amd/display: Check if set_blank_data_double_buffer exists before call
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=90830e840e39df36e86dae17b41b501bc93dba49;p=linux.git

drm/amd/display: Check if set_blank_data_double_buffer exists before call

Not all ASIC types have this function implemented - check before
calling.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Reviewed-by: Julian Parkin <jparkin@amd.com>
Acked-by: Leo Li <sunpeng.li@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 06d7bab550e11..5527717df3df2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -721,7 +721,8 @@ static void false_optc_underflow_wa(
 		dc->hwss.wait_for_mpcc_disconnect(dc, dc->res_pool, old_pipe_ctx);
 	}
 
-	tg->funcs->set_blank_data_double_buffer(tg, true);
+	if (tg->funcs->set_blank_data_double_buffer)
+		tg->funcs->set_blank_data_double_buffer(tg, true);
 
 	if (tg->funcs->is_optc_underflow_occurred(tg) && !underflow)
 		tg->funcs->clear_optc_underflow(tg);