[PATCH] drm/amd/display: Handle NULL dccg in dce110_disable_stream

[Michel Dänzer]

From: Michel Dänzer <mdaenzer at redhat.com>

It can be NULL e.g. with Raven.

Fixes: 927e784c180c ("drm/amd/display: Add symclk enable/disable during stream enable/disable")
Signed-off-by: Michel Dänzer <mdaenzer at redhat.com>
---
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

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 ad967b58d7be..a9dca69ee8f6 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -1179,9 +1179,11 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx)
 		dccg->funcs->set_dtbclk_dto(dccg, &dto_params);
 		dccg->funcs->disable_symclk32_se(dccg, dp_hpo_inst);
 		dccg->funcs->set_dpstreamclk(dccg, REFCLK, tg->inst, dp_hpo_inst);
-	} else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST && dccg->funcs->disable_symclk_se)
+	} else if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST &&
+		   dccg && dccg->funcs->disable_symclk_se) {
 		dccg->funcs->disable_symclk_se(dccg, stream_enc->stream_enc_inst,
-				link_enc->transmitter - TRANSMITTER_UNIPHY_A);
+					       link_enc->transmitter - TRANSMITTER_UNIPHY_A);
+	}
 
 	if (dc->link_srv->dp_is_128b_132b_signal(pipe_ctx)) {
 		/* TODO: This looks like a bug to me as we are disabling HPO IO when
-- 
2.40.1