drm/amd/display: Fix for dmub outbox notification enable

[Why]
Currently driver enables dmub outbox notification before oubox ISR is
registered. During boot scenario, sometimes dmub issues hpd outbox
message before driver registers ISR and those messages are missed.

[How]
Enable dmub outbox notification after outbox ISR is registered. Also,
restructured outbox enable code to call from dm layer and renamed APIs.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@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/core/dc.c

@@ -76,6 +76,8 @@
 
 #include "dc_trace.h"
 
+#include "dce/dmub_outbox.h"
+
 #define CTX \
 	dc->ctx
 
@@ -3706,13 +3708,23 @@ void dc_hardware_release(struct dc *dc)
 }
 #endif
 
-/**
+/*
- * dc_enable_dmub_notifications - Returns whether dmub notification can be enabled
+ *****************************************************************************
- * @dc: dc structure
+ * Function: dc_is_dmub_outbox_supported -
+ * 
+ * @brief 
+ *      Checks whether DMUB FW supports outbox notifications, if supported
+ *		DM should register outbox interrupt prior to actually enabling interrupts
+ *		via dc_enable_dmub_outbox
  *
- * Returns: True to enable dmub notifications, False otherwise
+ *  @param
+ *		[in] dc: dc structure
+ *
+ *  @return
+ *		True if DMUB FW supports outbox notifications, False otherwise
+ *****************************************************************************
  */
-bool dc_enable_dmub_notifications(struct dc *dc)
+bool dc_is_dmub_outbox_supported(struct dc *dc)
 {
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	/* YELLOW_CARP B0 USB4 DPIA needs dmub notifications for interrupts */
@@ -3727,6 +3739,48 @@ bool dc_enable_dmub_notifications(struct dc *dc)
 
 /**
  * dc_process_dmub_aux_transfer_async - Submits aux command to dmub via inbox message
+ *  Function: dc_enable_dmub_notifications
+ *
+ *  @brief
+ *		Calls dc_is_dmub_outbox_supported to check if dmub fw supports outbox
+ *		notifications. All DMs shall switch to dc_is_dmub_outbox_supported.
+ *		This API shall be removed after switching.
+ *
+ *  @param
+ *		[in] dc: dc structure
+ *
+ *  @return
+ *		True if DMUB FW supports outbox notifications, False otherwise
+ *****************************************************************************
+ */
+bool dc_enable_dmub_notifications(struct dc *dc)
+{
+	return dc_is_dmub_outbox_supported(dc);
+}
+
+/**
+ *****************************************************************************
+ *  Function: dc_enable_dmub_outbox
+ *
+ *  @brief
+ *		Enables DMUB unsolicited notifications to x86 via outbox
+ *
+ *  @param
+ *		[in] dc: dc structure
+ *
+ *  @return
+ *		None
+ *****************************************************************************
+ */
+void dc_enable_dmub_outbox(struct dc *dc)
+{
+	struct dc_context *dc_ctx = dc->ctx;
+
+	dmub_enable_outbox_notification(dc_ctx->dmub_srv);
+}
+
+/**
+ *****************************************************************************
  *                                      Sets port index appropriately for legacy DDC
  * @dc: dc structure
  * @link_index: link index
@@ -3828,7 +3882,7 @@ uint8_t get_link_index_from_dpia_port_index(const struct dc *dc,
  *		[in] payload: aux payload
  *		[out] notify: set_config immediate reply
  *
- *	@return
+ *  @return
  *		True if successful, False if failure
  *****************************************************************************
  */

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

@@ -1443,8 +1443,11 @@ void dc_z10_restore(const struct dc *dc);
 void dc_z10_save_init(struct dc *dc);
 #endif
 
+bool dc_is_dmub_outbox_supported(struct dc *dc);
 bool dc_enable_dmub_notifications(struct dc *dc);
 
+void dc_enable_dmub_outbox(struct dc *dc);
+
 bool dc_process_dmub_aux_transfer_async(struct dc *dc,
 				uint32_t link_index,
 				struct aux_payload *payload);

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

@@ -22,20 +22,23 @@
  * Authors: AMD
  */
 
-#include "dmub_outbox.h"
+#include "dc.h"
 #include "dc_dmub_srv.h"
+#include "dmub_outbox.h"
 #include "dmub/inc/dmub_cmd.h"
 
-/**
+/*
- *  dmub_enable_outbox_notification - Sends inbox cmd to dmub to enable outbox1
+ *  Function: dmub_enable_outbox_notification
- *                                    messages with interrupt. Dmub sends outbox1
+ *
- *                                    message and triggers outbox1 interrupt.
+ *  @brief
- * @dc: dc structure
+ *		Sends inbox cmd to dmub for enabling outbox notifications to x86.
+ *
+ *  @param
+ *		[in] dmub_srv: dmub_srv structure
  */
-void dmub_enable_outbox_notification(struct dc *dc)
+void dmub_enable_outbox_notification(struct dc_dmub_srv *dmub_srv)
 {
 	union dmub_rb_cmd cmd;
-	struct dc_context *dc_ctx = dc->ctx;
 
 	memset(&cmd, 0x0, sizeof(cmd));
 	cmd.outbox1_enable.header.type = DMUB_CMD__OUTBOX1_ENABLE;
@@ -45,7 +48,7 @@ void dmub_enable_outbox_notification(struct dc *dc)
 		sizeof(cmd.outbox1_enable.header);
 	cmd.outbox1_enable.enable = true;
 
-	dc_dmub_srv_cmd_queue(dc_ctx->dmub_srv, &cmd);
+	dc_dmub_srv_cmd_queue(dmub_srv, &cmd);
-	dc_dmub_srv_cmd_execute(dc_ctx->dmub_srv);
+	dc_dmub_srv_cmd_execute(dmub_srv);
-	dc_dmub_srv_wait_idle(dc_ctx->dmub_srv);
+	dc_dmub_srv_wait_idle(dmub_srv);
 }

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

@@ -26,8 +26,8 @@
 #ifndef _DMUB_OUTBOX_H_
 #define _DMUB_OUTBOX_H_
 
-#include "dc.h"
+struct dc_dmub_srv;
 
-void dmub_enable_outbox_notification(struct dc *dc);
+void dmub_enable_outbox_notification(struct dc_dmub_srv *dmub_srv);
 
 #endif /* _DMUB_OUTBOX_H_ */

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -1500,10 +1500,6 @@ void dcn10_init_hw(struct dc *dc)
 				hws->funcs.dsc_pg_control(hws, res_pool->dscs[i]->inst, false);
 	}
 
-	/* Enable outbox notification feature of dmub */
-	if (dc->debug.enable_dmub_aux_for_legacy_ddc)
-		dmub_enable_outbox_notification(dc);
-
 	/* we want to turn off all dp displays before doing detection */
 	dc_link_blank_all_dp_displays(dc);
 

drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c

@@ -194,7 +194,7 @@ void dcn31_init_hw(struct dc *dc)
 
 	/* Enables outbox notifications for usb4 dpia */
 	if (dc->res_pool->usb4_dpia_count)
-		dmub_enable_outbox_notification(dc);
+		dmub_enable_outbox_notification(dc->ctx->dmub_srv);
 
 	/* we want to turn off all dp displays before doing detection */
 	dc_link_blank_all_dp_displays(dc);