drm/amd: Expose the FRU SMU I2C bus

Expose both SMU I2C buses. Some boards use the same bus for both the RAS
and FRU EEPROMs and others use different buses.  This enables the
additional I2C bus and sets the right buses to use for RAS and FRU EEPROM
access.

Cc: Roy Sun <Roy.Sun@amd.com>
Co-developed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index ba857ca75392..2766b88ecf96 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -284,6 +284,15 @@ enum ip_power_state {
 /* Used to mask smu debug modes */
 #define SMU_DEBUG_HALT_ON_ERROR		0x1
 
+#define MAX_SMU_I2C_BUSES       2
+
+struct amdgpu_smu_i2c_bus {
+	struct i2c_adapter adapter;
+	struct amdgpu_device *adev;
+	int port;
+	struct mutex mutex;
+};
+
 struct amdgpu_pm {
 	struct mutex		mutex;
 	u32                     current_sclk;
@@ -316,8 +325,9 @@ struct amdgpu_pm {
 	uint32_t pp_feature;
 
 	/* Used for I2C access to various EEPROMs on relevant ASICs */
-	struct i2c_adapter smu_i2c;
-	struct mutex		smu_i2c_mutex;
+	struct amdgpu_smu_i2c_bus smu_i2c[MAX_SMU_I2C_BUSES];
+	struct i2c_adapter     *ras_eeprom_i2c_bus;
+	struct i2c_adapter     *fru_eeprom_i2c_bus;
 	struct list_head	pm_attr_list;
 
 	atomic_t		pwr_state[AMD_IP_BLOCK_TYPE_NUM];