drm/amd/display: Adjust reg field for DSC wait for disconnect

[WHY]
DSC was waiting for the wrong field to disconnect cleanly.

[HOW]
Changed field the DSC disconnect was waiting on.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ryan Seto <ryanseto@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dsc/dcn20/dcn20_dsc.h

@@ -454,7 +454,9 @@
 	type DSCCIF_UPDATE_TAKEN_ACK; \
 	type DSCRM_DSC_FORWARD_EN; \
 	type DSCRM_DSC_OPP_PIPE_SOURCE; \
-	type DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING
+	type DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING; \
+	type DSCRM_DSC_FORWARD_EN_STATUS
+
 
 struct dcn20_dsc_registers {
 	uint32_t DSC_TOP_CONTROL;

drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.c

@@ -208,7 +208,7 @@ static void dsc401_wait_disconnect_pending_clear(struct display_stream_compresso
 {
 	struct dcn401_dsc *dsc401 = TO_DCN401_DSC(dsc);
 
-	REG_WAIT(DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING, 0, 2, 50000);
+	REG_WAIT(DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN_STATUS, 0, 2, 50000);
 }
 
 static void dsc401_disconnect(struct display_stream_compressor *dsc)

drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.h

@@ -196,7 +196,8 @@
 	DSC2_SF(DSCCIF0, DSCCIF_CONFIG0__BITS_PER_COMPONENT, mask_sh), \
 	DSC_SF(DSCCIF0_DSCCIF_CONFIG0, DOUBLE_BUFFER_REG_UPDATE_PENDING, mask_sh), \
 	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN, mask_sh), \
-	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_OPP_PIPE_SOURCE, mask_sh)
+	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_OPP_PIPE_SOURCE, mask_sh), \
+	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN_STATUS, mask_sh)
 
 struct dcn401_dsc_registers {
 	uint32_t DSC_TOP_CONTROL;