[AMD Official Use Only - General]
Reviewed-by: Hawing Zhang <Hawking.Zhang@xxxxxxx>
Regards,
Hawking
-----Original Message-----
From: Chai, Thomas <YiPeng.Chai@xxxxxxx>
Sent: Wednesday, July 20, 2022 10:49
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Chai, Thomas <YiPeng.Chai@xxxxxxx>; Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Zhou1, Tao <Tao.Zhou1@xxxxxxx>; Clements, John <John.Clements@xxxxxxx>; Li, Candice <Candice.Li@xxxxxxx>; Chai, Thomas <YiPeng.Chai@xxxxxxx>; Quan, Evan <Evan.Quan@xxxxxxx>; Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Subject: [PATCH] drm/pm/swsmu: add ras eeprom i2c function for smu13 v13_0_0
Add ras eeprom i2c function for smu13 v13_0_0.
Signed-off-by: YiPeng Chai <YiPeng.Chai@xxxxxxx>
Acked-by: Evan Quan <evan.quan@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
.../drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c | 157 ++++++++++++++++++
1 file changed, 157 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
index ce2fa04e3926..2b83191e8006 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
@@ -196,6 +196,7 @@ static struct cmn2asic_mapping smu_v13_0_0_table_map[SMU_TABLE_COUNT] = {
TAB_MAP(DRIVER_SMU_CONFIG),
TAB_MAP(ACTIVITY_MONITOR_COEFF),
[SMU_TABLE_COMBO_PPTABLE] = {1, TABLE_COMBO_PPTABLE},
+ TAB_MAP(I2C_COMMANDS),
};
static struct cmn2asic_mapping smu_v13_0_0_pwr_src_map[SMU_POWER_SOURCE_COUNT] = { @@ -1606,9 +1607,165 @@ static bool smu_v13_0_0_is_mode1_reset_supported(struct smu_context *smu)
return true;
}
+static int smu_v13_0_0_i2c_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg *msg, int num_msgs) {
+ struct amdgpu_smu_i2c_bus *smu_i2c = i2c_get_adapdata(i2c_adap);
+ struct amdgpu_device *adev = smu_i2c->adev;
+ struct smu_context *smu = adev->powerplay.pp_handle;
+ struct smu_table_context *smu_table = &smu->smu_table;
+ struct smu_table *table = &smu_table->driver_table;
+ SwI2cRequest_t *req, *res = (SwI2cRequest_t *)table->cpu_addr;
+ int i, j, r, c;
+ u16 dir;
+
+ if (!adev->pm.dpm_enabled)
+ return -EBUSY;
+
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ req->I2CcontrollerPort = smu_i2c->port;
+ req->I2CSpeed = I2C_SPEED_FAST_400K;
+ req->SlaveAddress = msg[0].addr << 1; /* wants an 8-bit address */
+ dir = msg[0].flags & I2C_M_RD;
+
+ for (c = i = 0; i < num_msgs; i++) {
+ for (j = 0; j < msg[i].len; j++, c++) {
+ SwI2cCmd_t *cmd = &req->SwI2cCmds[c];
+
+ if (!(msg[i].flags & I2C_M_RD)) {
+ /* write */
+ cmd->CmdConfig |= CMDCONFIG_READWRITE_MASK;
+ cmd->ReadWriteData = msg[i].buf[j];
+ }
+
+ if ((dir ^ msg[i].flags) & I2C_M_RD) {
+ /* The direction changes.
+ */
+ dir = msg[i].flags & I2C_M_RD;
+ cmd->CmdConfig |= CMDCONFIG_RESTART_MASK;
+ }
+
+ req->NumCmds++;
+
+ /*
+ * Insert STOP if we are at the last byte of either last
+ * message for the transaction or the client explicitly
+ * requires a STOP at this particular message.
+ */
+ if ((j == msg[i].len - 1) &&
+ ((i == num_msgs - 1) || (msg[i].flags & I2C_M_STOP))) {
+ cmd->CmdConfig &= ~CMDCONFIG_RESTART_MASK;
+ cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
+ }
+ }
+ }
+ mutex_lock(&adev->pm.mutex);
+ r = smu_cmn_update_table(smu, SMU_TABLE_I2C_COMMANDS, 0, req, true);
+ mutex_unlock(&adev->pm.mutex);
+ if (r)
+ goto fail;
+
+ for (c = i = 0; i < num_msgs; i++) {
+ if (!(msg[i].flags & I2C_M_RD)) {
+ c += msg[i].len;
+ continue;
+ }
+ for (j = 0; j < msg[i].len; j++, c++) {
+ SwI2cCmd_t *cmd = &res->SwI2cCmds[c];
+
+ msg[i].buf[j] = cmd->ReadWriteData;
+ }
+ }
+ r = num_msgs;
+fail:
+ kfree(req);
+ return r;
+}
+
+static u32 smu_v13_0_0_i2c_func(struct i2c_adapter *adap) {
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; }
+
+static const struct i2c_algorithm smu_v13_0_0_i2c_algo = {
+ .master_xfer = smu_v13_0_0_i2c_xfer,
+ .functionality = smu_v13_0_0_i2c_func, };
+
+static const struct i2c_adapter_quirks smu_v13_0_0_i2c_control_quirks = {
+ .flags = I2C_AQ_COMB | I2C_AQ_COMB_SAME_ADDR | I2C_AQ_NO_ZERO_LEN,
+ .max_read_len = MAX_SW_I2C_COMMANDS,
+ .max_write_len = MAX_SW_I2C_COMMANDS,
+ .max_comb_1st_msg_len = 2,
+ .max_comb_2nd_msg_len = MAX_SW_I2C_COMMANDS - 2, };
+
+static int smu_v13_0_0_i2c_control_init(struct smu_context *smu) {
+ struct amdgpu_device *adev = smu->adev;
+ int res, i;
+
+ for (i = 0; i < MAX_SMU_I2C_BUSES; i++) {
+ struct amdgpu_smu_i2c_bus *smu_i2c = &adev->pm.smu_i2c[i];
+ struct i2c_adapter *control = &smu_i2c->adapter;
+
+ smu_i2c->adev = adev;
+ smu_i2c->port = i;
+ mutex_init(&smu_i2c->mutex);
+ control->owner = THIS_MODULE;
+ control->class = I2C_CLASS_SPD;
+ control->dev.parent = &adev->pdev->dev;
+ control->algo = &smu_v13_0_0_i2c_algo;
+ snprintf(control->name, sizeof(control->name), "AMDGPU SMU %d", i);
+ control->quirks = &smu_v13_0_0_i2c_control_quirks;
+ i2c_set_adapdata(control, smu_i2c);
+
+ res = i2c_add_adapter(control);
+ if (res) {
+ DRM_ERROR("Failed to register hw i2c, err: %d\n", res);
+ goto Out_err;
+ }
+ }
+
+ /* assign the buses used for the FRU EEPROM and RAS EEPROM */
+ /* XXX ideally this would be something in a vbios data table */
+ adev->pm.ras_eeprom_i2c_bus = &adev->pm.smu_i2c[1].adapter;
+ adev->pm.fru_eeprom_i2c_bus = &adev->pm.smu_i2c[0].adapter;
+
+ return 0;
+Out_err:
+ for ( ; i >= 0; i--) {
+ struct amdgpu_smu_i2c_bus *smu_i2c = &adev->pm.smu_i2c[i];
+ struct i2c_adapter *control = &smu_i2c->adapter;
+
+ i2c_del_adapter(control);
+ }
+ return res;
+}
+
+static void smu_v13_0_0_i2c_control_fini(struct smu_context *smu) {
+ struct amdgpu_device *adev = smu->adev;
+ int i;
+
+ for (i = 0; i < MAX_SMU_I2C_BUSES; i++) {
+ struct amdgpu_smu_i2c_bus *smu_i2c = &adev->pm.smu_i2c[i];
+ struct i2c_adapter *control = &smu_i2c->adapter;
+
+ i2c_del_adapter(control);
+ }
+ adev->pm.ras_eeprom_i2c_bus = NULL;
+ adev->pm.fru_eeprom_i2c_bus = NULL;
+}
+
static const struct pptable_funcs smu_v13_0_0_ppt_funcs = {
.get_allowed_feature_mask = smu_v13_0_0_get_allowed_feature_mask,
.set_default_dpm_table = smu_v13_0_0_set_default_dpm_table,
+ .i2c_init = smu_v13_0_0_i2c_control_init,
+ .i2c_fini = smu_v13_0_0_i2c_control_fini,
.is_dpm_running = smu_v13_0_0_is_dpm_running,
.dump_pptable = smu_v13_0_0_dump_pptable,
.init_microcode = smu_v13_0_init_microcode,
--
2.25.1
