From: Charlene Liu <charlene.liu@amd.com>
Date: Tue, 9 Jan 2018 17:24:10 -0500
Subject: drm/amd/display: disable az_clock_gating for endpoint register access
 only
Git-commit: 701ed303b2c064a529277a6b1b53fccb53fe758b
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_audio.c |   18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c
@@ -359,7 +359,10 @@ void dce_aud_az_enable(struct audio *aud
 			    AUDIO_ENABLED);
 
 	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL, value);
-	value = AZ_REG_READ(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL);
+	set_reg_field_value(value, 0,
+			AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
+			CLOCK_GATING_DISABLE);
+	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL, value);
 
 	dm_logger_write(CTX->logger, LOG_HW_AUDIO,
 			"\n\t========= AUDIO:dce_aud_az_enable: index: %u  data: 0x%x\n",
@@ -372,6 +375,10 @@ void dce_aud_az_disable(struct audio *au
 	struct dce_audio *aud = DCE_AUD(audio);
 
 	value = AZ_REG_READ(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL);
+	set_reg_field_value(value, 1,
+			AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
+			CLOCK_GATING_DISABLE);
+	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL, value);
 
 	set_reg_field_value(value, 0,
 		AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
@@ -716,6 +723,11 @@ void dce_aud_az_configure(
 		DESCRIPTION17);
 
 	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_SINK_INFO8, value);
+	value = AZ_REG_READ(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL);
+	set_reg_field_value(value, 0,
+			AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
+			CLOCK_GATING_DISABLE);
+	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL, value);
 }
 
 /*
@@ -897,6 +909,10 @@ void dce_aud_hw_init(
 	REG_UPDATE_2(AZALIA_F0_CODEC_FUNCTION_PARAMETER_POWER_STATES,
 			CLKSTOP, 1,
 			EPSS, 1);
+	set_reg_field_value(value, 0,
+			AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL,
+			CLOCK_GATING_DISABLE);
+	AZ_REG_WRITE(AZALIA_F0_CODEC_PIN_CONTROL_HOT_PLUG_CONTROL, value);
 }
 
 static const struct audio_funcs funcs = {