drm/amd/display: Should disable when new stream is null

core_link_disable_stream should be called when the new stream is null
(i.e. want to disable). Modify the if condition to reflect that.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 1229a3315018e4c4fb6af64134b4deb211716360..be14a26650728bfc5b58fd167356614a56847795 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1868,8 +1868,10 @@ static void dce110_reset_hw_ctx_wrap(
                                pipe_need_reprogram(pipe_ctx_old, pipe_ctx)) {
                        struct clock_source *old_clk = pipe_ctx_old->clock_source;
 
-                       /* disable already, no need to disable again */
-                       if (pipe_ctx->stream && !pipe_ctx->stream->dpms_off)
+                       /* Disable if new stream is null. O/w, if stream is
+                        * disabled already, no need to disable again.
+                        */
+                       if (!pipe_ctx->stream || !pipe_ctx->stream->dpms_off)
                                core_link_disable_stream(pipe_ctx_old, FREE_ACQUIRED_RESOURCE);
 
                        pipe_ctx_old->stream_res.tg->funcs->set_blank(pipe_ctx_old->stream_res.tg, true);