drm/amdgpu/powerplay: add a new interface to set the mp1 state

This is required for certain cases such as various GPU resets
(mode1, mode2), BACO, shutdown, unload, etc. to put the SMU into
the appropriate state for when the hw is re-initialized.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/kgd_pp_interface.h

@@ -171,6 +171,13 @@ enum PP_HWMON_TEMP {
 	PP_TEMP_MAX
 };
 
+enum pp_mp1_state {
+	PP_MP1_STATE_NONE,
+	PP_MP1_STATE_SHUTDOWN,
+	PP_MP1_STATE_UNLOAD,
+	PP_MP1_STATE_RESET,
+};
+
 #define PP_GROUP_MASK        0xF0000000
 #define PP_GROUP_SHIFT       28
 
@@ -266,6 +273,7 @@ struct amd_pm_funcs {
 	int (*get_power_profile_mode)(void *handle, char *buf);
 	int (*set_power_profile_mode)(void *handle, long *input, uint32_t size);
 	int (*odn_edit_dpm_table)(void *handle, uint32_t type, long *input, uint32_t size);
+	int (*set_mp1_state)(void *handle, enum pp_mp1_state mp1_state);
 /* export to DC */
 	u32 (*get_sclk)(void *handle, bool low);
 	u32 (*get_mclk)(void *handle, bool low);