diff options
author | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-01-26 20:09:18 +0300 |
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committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-01 07:24:40 +0300 |
commit | 14df56504fdf5d1e84096a4818ff7efc891bfdb6 (patch) | |
tree | c6f8cfd26ab15136060f3f48ccb985464059e6c4 /drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | |
parent | 6a0a55a2eb4584a7189daa3dabdf0c82bdd6466b (diff) | |
download | linux-14df56504fdf5d1e84096a4818ff7efc891bfdb6.tar.xz |
drm/amd/pm: SMU I2C: Return number of messages processed
Fix from number of processed bytes to number of
processed I2C messages.
Cc: Jean Delvare <jdelvare@suse.de>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c')
-rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c index 1741598bc9fe..e2f55727c6fd 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c @@ -2742,9 +2742,8 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap, struct smu_table_context *smu_table = &adev->smu.smu_table; struct smu_table *table = &smu_table->driver_table; SwI2cRequest_t *req, *res = (SwI2cRequest_t *)table->cpu_addr; - u16 bytes_to_transfer, remaining_bytes, msg_bytes; - u16 available_bytes = MAX_SW_I2C_COMMANDS; - int i, j, r, c; + short available_bytes = MAX_SW_I2C_COMMANDS; + int i, j, r, c, num_done = 0; u8 slave; /* only support a single slave addr per transaction */ @@ -2752,8 +2751,15 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap, for (i = 0; i < num; i++) { if (slave != msgs[i].addr) return -EINVAL; - bytes_to_transfer += min(msgs[i].len, available_bytes); - available_bytes -= bytes_to_transfer; + + available_bytes -= msgs[i].len; + if (available_bytes >= 0) { + num_done++; + } else { + /* This message and all the follwing won't be processed */ + available_bytes += msgs[i].len; + break; + } } req = kzalloc(sizeof(*req), GFP_KERNEL); @@ -2763,24 +2769,28 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap, req->I2CcontrollerPort = 0; req->I2CSpeed = I2C_SPEED_FAST_400K; req->SlaveAddress = slave << 1; /* 8 bit addresses */ - req->NumCmds = bytes_to_transfer; + req->NumCmds = MAX_SW_I2C_COMMANDS - available_bytes;; - remaining_bytes = bytes_to_transfer; c = 0; - for (i = 0; i < num; i++) { + for (i = 0; i < num_done; i++) { struct i2c_msg *msg = &msgs[i]; - msg_bytes = min(msg->len, remaining_bytes); - for (j = 0; j < msg_bytes; j++) { + for (j = 0; j < msg->len; j++) { SwI2cCmd_t *cmd = &req->SwI2cCmds[c++]; - remaining_bytes--; if (!(msg[i].flags & I2C_M_RD)) { /* write */ cmd->CmdConfig |= I2C_CMD_WRITE; cmd->RegisterAddr = msg->buf[j]; } - if (!remaining_bytes) + + /* + * 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->len -1 ) && + ((i == num_done - 1) || (msg[i].flags & I2C_M_STOP))) cmd->CmdConfig |= CMDCONFIG_STOP_MASK; if ((j == 0) && !(msg[i].flags & I2C_M_NOSTART)) @@ -2793,21 +2803,18 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap, if (r) goto fail; - remaining_bytes = bytes_to_transfer; c = 0; - for (i = 0; i < num; i++) { + for (i = 0; i < num_done; i++) { struct i2c_msg *msg = &msgs[i]; - msg_bytes = min(msg->len, remaining_bytes); - for (j = 0; j < msg_bytes; j++) { + for (j = 0; j < msg->len; j++) { SwI2cCmd_t *cmd = &res->SwI2cCmds[c++]; - remaining_bytes--; if (msg[i].flags & I2C_M_RD) msg->buf[j] = cmd->Data; } } - r = bytes_to_transfer; + r = num_done; fail: kfree(req); |