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);

drivers/gpu/drm/amd/powerplay/amd_powerplay.c

@@ -924,6 +924,21 @@ static int pp_odn_edit_dpm_table(void *handle, uint32_t type, long *input, uint3
 	return hwmgr->hwmgr_func->odn_edit_dpm_table(hwmgr, type, input, size);
 }
 
+static int pp_dpm_set_mp1_state(void *handle, enum pp_mp1_state mp1_state)
+{
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr || !hwmgr->pm_en)
+		return -EINVAL;
+
+	if (hwmgr->hwmgr_func->set_mp1_state == NULL) {
+		pr_info_ratelimited("%s was not implemented.\n", __func__);
+		return -EINVAL;
+	}
+
+	return hwmgr->hwmgr_func->set_mp1_state(hwmgr, mp1_state);
+}
+
 static int pp_dpm_switch_power_profile(void *handle,
 		enum PP_SMC_POWER_PROFILE type, bool en)
 {
@@ -1525,6 +1540,7 @@ static const struct amd_pm_funcs pp_dpm_funcs = {
 	.get_power_profile_mode = pp_get_power_profile_mode,
 	.set_power_profile_mode = pp_set_power_profile_mode,
 	.odn_edit_dpm_table = pp_odn_edit_dpm_table,
+	.set_mp1_state = pp_dpm_set_mp1_state,
 	.set_power_limit = pp_set_power_limit,
 	.get_power_limit = pp_get_power_limit,
 /* export to DC */

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

@@ -344,6 +344,7 @@ struct pp_hwmgr_func {
 	int (*set_asic_baco_state)(struct pp_hwmgr *hwmgr, enum BACO_STATE state);
 	int (*get_ppfeature_status)(struct pp_hwmgr *hwmgr, char *buf);
 	int (*set_ppfeature_status)(struct pp_hwmgr *hwmgr, uint64_t ppfeature_masks);
+	int (*set_mp1_state)(struct pp_hwmgr *hwmgr, enum pp_mp1_state mp1_state);
 };
 
 struct pp_table_func {