drm/amd/display: Add PSR SMU Interrupt support

[WHY]
We have new bios capabilities enabling s0i2 entry on SMU interrupt. We want
this interrupt to be fired on PSR transitions such that we enter s0i2
when entering PSR active.

[HOW]
Add code to send the SMU interrupt with the appropriate
staticscreen flag when entering and exting PSR. Protect this
code with a config flag since it currently impacts BL PWM.
Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Acked-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_types.h

@@ -550,9 +550,9 @@ struct psr_config {
 	unsigned char psr_version;
 	unsigned int psr_rfb_setup_time;
 	bool psr_exit_link_training_required;
-
 	bool psr_frame_capture_indication_req;
 	unsigned int psr_sdp_transmit_line_num_deadline;
+	bool allow_smu_optimizations;
 };
 
 union dmcu_psr_level {
@@ -654,6 +654,7 @@ struct psr_context {
 	 * continuing powerd own
 	 */
 	unsigned int frame_delay;
+	bool allow_smu_optimizations;
 };
 
 struct colorspace_transform {

drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c

@@ -213,9 +213,6 @@ static bool dce_dmcu_setup_psr(struct dmcu *dmcu,
 	link->link_enc->funcs->psr_program_secondary_packet(link->link_enc,
 			psr_context->sdpTransmitLineNumDeadline);
 
-	if (psr_context->psr_level.bits.SKIP_SMU_NOTIFICATION)
-		REG_UPDATE(SMU_INTERRUPT_CONTROL, DC_SMU_INT_ENABLE, 1);
-
 	/* waitDMCUReadyForCmd */
 	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
 					dmcu_wait_reg_ready_interval,
@@ -594,7 +591,7 @@ static bool dcn10_dmcu_setup_psr(struct dmcu *dmcu,
 	link->link_enc->funcs->psr_program_secondary_packet(link->link_enc,
 			psr_context->sdpTransmitLineNumDeadline);
 
-	if (psr_context->psr_level.bits.SKIP_SMU_NOTIFICATION)
+	if (psr_context->allow_smu_optimizations)
 		REG_UPDATE(SMU_INTERRUPT_CONTROL, DC_SMU_INT_ENABLE, 1);
 
 	/* waitDMCUReadyForCmd */
@@ -615,6 +612,7 @@ static bool dcn10_dmcu_setup_psr(struct dmcu *dmcu,
 			psr_context->psrFrameCaptureIndicationReq;
 	masterCmdData1.bits.aux_chan = psr_context->channel;
 	masterCmdData1.bits.aux_repeat = psr_context->aux_repeats;
+	masterCmdData1.bits.allow_smu_optimizations = psr_context->allow_smu_optimizations;
 	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
 					masterCmdData1.u32All);
 
@@ -635,6 +633,7 @@ static bool dcn10_dmcu_setup_psr(struct dmcu *dmcu,
 	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG3),
 			masterCmdData3.u32All);
 
+
 	/* setDMCUParam_Cmd */
 	REG_UPDATE(MASTER_COMM_CMD_REG,
 			MASTER_COMM_CMD_REG_BYTE0, PSR_SET);

drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h

@@ -208,7 +208,7 @@ union dce_dmcu_psr_config_data_reg1 {
 		unsigned int frame_cap_ind:1;                    /*[23:23]*/
 		unsigned int aux_chan:3;                         /*[26:24]*/
 		unsigned int aux_repeat:4;                       /*[30:27]*/
-		unsigned int reserved:1;           /*[31:31]*/
+		unsigned int allow_smu_optimizations:1;         /*[31:31]*/
 	} bits;
 	unsigned int u32All;
 };