drm/amd/display: Fix DMUB outbox trace in S4 (#4465)

[Why]
DMUB Outbox0 read/write pointer not sync after resumed from S4.
And that caused old traces were sent to outbox.

[How]
Disable DMUB Outbox0 interrupt
and clear DMUB Outbox0 read/write pointer when resumes from S4.
And then enable Outbox0 interrupt before starts DMCUB.
Reviewed-by: NNicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: NJasdeep Dhillon <jdhillon@amd.com>
Tested-by: NDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: NCruise Hung <Cruise.Hung@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c

@@ -513,12 +513,10 @@ void dccg31_set_physymclk(
 /* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */
 static void dccg31_set_dtbclk_dto(
 		struct dccg *dccg,
-		int dtbclk_inst,
-		int req_dtbclk_khz,
-		int num_odm_segments,
-		const struct dc_crtc_timing *timing)
+		struct dtbclk_dto_params *params)
 {
 	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+	int req_dtbclk_khz = params->pixclk_khz;
 	uint32_t dtbdto_div;
 
 	/* Mode	                DTBDTO Rate       DTBCLK_DTO<x>_DIV Register
@@ -529,57 +527,56 @@ static void dccg31_set_dtbclk_dto(
 	 * DSC native 4:2:2     pixel rate/2      4
 	 * Other modes          pixel rate        8
 	 */
-	if (num_odm_segments == 4) {
+	if (params->num_odm_segments == 4) {
 		dtbdto_div = 2;
-		req_dtbclk_khz = req_dtbclk_khz / 4;
-	} else if ((num_odm_segments == 2) ||
-			(timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) ||
-			(timing->flags.DSC && timing->pixel_encoding == PIXEL_ENCODING_YCBCR422
-					&& !timing->dsc_cfg.ycbcr422_simple)) {
+		req_dtbclk_khz = params->pixclk_khz / 4;
+	} else if ((params->num_odm_segments == 2) ||
+			(params->timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) ||
+			(params->timing->flags.DSC && params->timing->pixel_encoding == PIXEL_ENCODING_YCBCR422
+					&& !params->timing->dsc_cfg.ycbcr422_simple)) {
 		dtbdto_div = 4;
-		req_dtbclk_khz = req_dtbclk_khz / 2;
+		req_dtbclk_khz = params->pixclk_khz / 2;
 	} else
 		dtbdto_div = 8;
 
-	if (dccg->ref_dtbclk_khz && req_dtbclk_khz) {
+	if (params->ref_dtbclk_khz && req_dtbclk_khz) {
 		uint32_t modulo, phase;
 
 		// phase / modulo = dtbclk / dtbclk ref
-		modulo = dccg->ref_dtbclk_khz * 1000;
-		phase = div_u64((((unsigned long long)modulo * req_dtbclk_khz) + dccg->ref_dtbclk_khz - 1),
-			dccg->ref_dtbclk_khz);
+		modulo = params->ref_dtbclk_khz * 1000;
+		phase = div_u64((((unsigned long long)modulo * req_dtbclk_khz) + params->ref_dtbclk_khz - 1),
+				params->ref_dtbclk_khz);
 
-		REG_UPDATE(OTG_PIXEL_RATE_CNTL[dtbclk_inst],
-				DTBCLK_DTO_DIV[dtbclk_inst], dtbdto_div);
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLK_DTO_DIV[params->otg_inst], dtbdto_div);
 
-		REG_WRITE(DTBCLK_DTO_MODULO[dtbclk_inst], modulo);
-		REG_WRITE(DTBCLK_DTO_PHASE[dtbclk_inst], phase);
+		REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], modulo);
+		REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], phase);
 
-		REG_UPDATE(OTG_PIXEL_RATE_CNTL[dtbclk_inst],
-				DTBCLK_DTO_ENABLE[dtbclk_inst], 1);
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLK_DTO_ENABLE[params->otg_inst], 1);
 
-		REG_WAIT(OTG_PIXEL_RATE_CNTL[dtbclk_inst],
-				DTBCLKDTO_ENABLE_STATUS[dtbclk_inst], 1,
+		REG_WAIT(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLKDTO_ENABLE_STATUS[params->otg_inst], 1,
 				1, 100);
 
 		/* The recommended programming sequence to enable DTBCLK DTO to generate
 		 * valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should
 		 * be set only after DTO is enabled
 		 */
-		REG_UPDATE(OTG_PIXEL_RATE_CNTL[dtbclk_inst],
-				PIPE_DTO_SRC_SEL[dtbclk_inst], 1);
-
-		dccg->dtbclk_khz[dtbclk_inst] = req_dtbclk_khz;
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				PIPE_DTO_SRC_SEL[params->otg_inst], 1);
 	} else {
-		REG_UPDATE_3(OTG_PIXEL_RATE_CNTL[dtbclk_inst],
-				DTBCLK_DTO_ENABLE[dtbclk_inst], 0,
-				PIPE_DTO_SRC_SEL[dtbclk_inst], 0,
-				DTBCLK_DTO_DIV[dtbclk_inst], dtbdto_div);
+		REG_UPDATE_3(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLK_DTO_ENABLE[params->otg_inst], 0,
+				PIPE_DTO_SRC_SEL[params->otg_inst], 0,
+				DTBCLK_DTO_DIV[params->otg_inst], dtbdto_div);
 
 		REG_WRITE(DTBCLK_DTO_MODULO[dtbclk_inst], 0);
 		REG_WRITE(DTBCLK_DTO_PHASE[dtbclk_inst], 0);
 
-		dccg->dtbclk_khz[dtbclk_inst] = 0;
+		REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], 0);
+		REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], 0);
 	}
 }
 

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c

@@ -132,6 +132,8 @@ void dmub_dcn31_reset(struct dmub_srv *dmub)
 	REG_WRITE(DMCUB_INBOX1_WPTR, 0);
 	REG_WRITE(DMCUB_OUTBOX1_RPTR, 0);
 	REG_WRITE(DMCUB_OUTBOX1_WPTR, 0);
+	REG_WRITE(DMCUB_OUTBOX0_RPTR, 0);
+	REG_WRITE(DMCUB_OUTBOX0_WPTR, 0);
 	REG_WRITE(DMCUB_SCRATCH0, 0);
 
 	/* Clear the GPINT command manually so we don't send anything during boot. */