drm/amd/display: add vsync notify to dmub for abm pause

[Why]
To prevent unnecessary wake up of DMCUB when ABM is enabled without PSR
enabled, driver will notify DMCUB to stop ABM's vertical interrupts
if vsync is disabled and steady state is reached.

[How]
Send inbox message to notify ABM pause based on vsync on/off

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 4647129c66fd..70e6d6905fda 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -1731,6 +1731,11 @@ enum dmub_cmd_abm_type {
 	 * Enable/disable fractional duty cycle for backlight PWM.
 	 */
 	DMUB_CMD__ABM_SET_PWM_FRAC	= 5,
+
+	/**
+	 * unregister vertical interrupt after steady state is reached
+	 */
+	DMUB_CMD__ABM_PAUSE	= 6,
 };
 
 /**
@@ -2087,6 +2092,50 @@ struct dmub_rb_cmd_abm_init_config {
 };
 
 /**
+ * Data passed from driver to FW in a DMUB_CMD__ABM_PAUSE command.
+ */
+
+struct dmub_cmd_abm_pause_data {
+
+	/**
+	 * Panel Control HW instance mask.
+	 * Bit 0 is Panel Control HW instance 0.
+	 * Bit 1 is Panel Control HW instance 1.
+	 */
+	uint8_t panel_mask;
+
+	/**
+	 * OTG hw instance
+	 */
+	uint8_t otg_inst;
+
+	/**
+	 * Enable or disable ABM pause
+	 */
+	uint8_t enable;
+
+	/**
+	 * Explicit padding to 4 byte boundary.
+	 */
+	uint8_t pad[1];
+};
+
+/**
+ * Definition of a DMUB_CMD__ABM_PAUSE command.
+ */
+struct dmub_rb_cmd_abm_pause {
+	/**
+	 * Command header.
+	 */
+	struct dmub_cmd_header header;
+
+	/**
+	 * Data passed from driver to FW in a DMUB_CMD__ABM_PAUSE command.
+	 */
+	struct dmub_cmd_abm_pause_data abm_pause_data;
+};
+
+/**
  * Data passed from driver to FW in a DMUB_CMD__QUERY_FEATURE_CAPS command.
  */
 struct dmub_cmd_query_feature_caps_data {
@@ -2365,6 +2414,11 @@ union dmub_rb_cmd {
 	struct dmub_rb_cmd_abm_init_config abm_init_config;
 
 	/**
+	 * Definition of a DMUB_CMD__ABM_PAUSE command.
+	 */
+	struct dmub_rb_cmd_abm_pause abm_pause;
+
+	/**
 	 * Definition of a DMUB_CMD__DP_AUX_ACCESS command.
 	 */
 	struct dmub_rb_cmd_dp_aux_access dp_aux_access;