drm/amd/display: add register offset != 0 check.

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-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/dce/dce_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c
index 0a6d483..c063175 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c
@@ -72,7 +72,8 @@ static void dce110_update_generic_info_packet(
        uint32_t max_retries = 50;
 
        /*we need turn on clock before programming AFMT block*/
-       REG_UPDATE(AFMT_CNTL, AFMT_AUDIO_CLOCK_EN, 1);
+       if (REG(AFMT_CNTL))
+               REG_UPDATE(AFMT_CNTL, AFMT_AUDIO_CLOCK_EN, 1);
 
        if (REG(AFMT_VBI_PACKET_CONTROL1)) {
                if (packet_index >= 8)

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 a92fb0a..c29052b 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
@@ -1004,9 +1004,9 @@ void dce110_disable_stream(struct pipe_ctx *pipe_ctx, int option)
                /*don't free audio if it is from retrain or internal disable stream*/
                if (option == FREE_ACQUIRED_RESOURCE && dc->caps.dynamic_audio == true) {
                        /*we have to dynamic arbitrate the audio endpoints*/
-                       pipe_ctx->stream_res.audio = NULL;
                        /*we free the resource, need reset is_audio_acquired*/
                        update_audio_usage(&dc->current_state->res_ctx, dc->res_pool, pipe_ctx->stream_res.audio, false);
+                       pipe_ctx->stream_res.audio = NULL;
                }
 
                /* TODO: notify audio driver for if audio modes list changed