[PATCH 06/26] drm/amd/display: Disable audio stream only if it's currently enabled

[sunpeng.li at amd.com]

From: Eryk Brol <eryk.brol at amd.com>

[Why]
Previously there were 2 consecutive calls being made to disable
audio stream. The first one disabled the audio stream, and the second
one went through and also tried to disable the audio stream causing
BACO entry issues due to the ASIC appearing busy.

[How]
1. Add a status field to the audio struct which stores enabled/disabled
info
2. In the calls to enable/disable audio stream check if we're already
in the desired state before executing the function

Signed-off-by: Eryk Brol <eryk.brol at amd.com>
Reviewed-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Leo Li <sunpeng.li at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 10 ++++++++++
 drivers/gpu/drm/amd/display/dc/inc/hw/audio.h               |  1 +
 2 files changed, 11 insertions(+)

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 bb28b05..f9ee771 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
@@ -961,6 +961,9 @@ void dce110_enable_audio_stream(struct pipe_ctx *pipe_ctx)
 	struct pp_smu_funcs *pp_smu = NULL;
 	unsigned int i, num_audio = 1;
 
+	if (pipe_ctx->stream_res.audio && pipe_ctx->stream_res.audio->enabled == true)
+		return;
+
 	if (core_dc->res_pool->pp_smu)
 		pp_smu = core_dc->res_pool->pp_smu;
 
@@ -980,6 +983,8 @@ void dce110_enable_audio_stream(struct pipe_ctx *pipe_ctx)
 		/* TODO: audio should be per stream rather than per link */
 		pipe_ctx->stream_res.stream_enc->funcs->audio_mute_control(
 					pipe_ctx->stream_res.stream_enc, false);
+		if (pipe_ctx->stream_res.audio)
+			pipe_ctx->stream_res.audio->enabled = true;
 	}
 }
 
@@ -988,6 +993,9 @@ void dce110_disable_audio_stream(struct pipe_ctx *pipe_ctx, int option)
 	struct dc *dc = pipe_ctx->stream->ctx->dc;
 	struct pp_smu_funcs *pp_smu = NULL;
 
+	if (pipe_ctx->stream_res.audio && pipe_ctx->stream_res.audio->enabled == false)
+		return;
+
 	pipe_ctx->stream_res.stream_enc->funcs->audio_mute_control(
 			pipe_ctx->stream_res.stream_enc, true);
 	if (pipe_ctx->stream_res.audio) {
@@ -1021,6 +1029,8 @@ void dce110_disable_audio_stream(struct pipe_ctx *pipe_ctx, int option)
 		/* dal_audio_disable_azalia_audio_jack_presence(stream->audio,
 		 * stream->stream_engine_id);
 		 */
+		if (pipe_ctx->stream_res.audio)
+			pipe_ctx->stream_res.audio->enabled = false;
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/audio.h b/drivers/gpu/drm/amd/display/dc/inc/hw/audio.h
index 925204f..6ed1fb8 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/audio.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/audio.h
@@ -57,6 +57,7 @@ struct audio {
 	const struct audio_funcs *funcs;
 	struct dc_context *ctx;
 	unsigned int inst;
+	bool enabled;
 };
 
 #endif  /* __DAL_AUDIO__ */
-- 
2.7.4