@@ -73,34 +73,43 @@ static int psp_send_check_i2c_req(struct psp_i2c_req *req)
return check_i2c_req_sts(req);
}
-static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
+static int psp_send_i2c_req_amdi0019(enum psp_i2c_req_type i2c_req_type)
{
struct psp_i2c_req *req;
- unsigned long start;
int status, ret;
/* Allocate command-response buffer */
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;
-
req->hdr.payload_size = sizeof(*req);
req->type = i2c_req_type;
-
- start = jiffies;
ret = read_poll_timeout(psp_send_check_i2c_req, status,
(status != -EBUSY),
PSP_I2C_REQ_RETRY_DELAY_US,
PSP_I2C_REQ_RETRY_CNT * PSP_I2C_REQ_RETRY_DELAY_US,
0, req);
- if (ret) {
+ kfree(req);
+
+ if (ret)
dev_err(psp_i2c_dev, "Timed out waiting for PSP to %s I2C bus\n",
(i2c_req_type == PSP_I2C_REQ_ACQUIRE) ?
"release" : "acquire");
- goto cleanup;
- }
- ret = status;
+ return ret ? ret : status;
+}
+
+static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
+{
+ unsigned long start = jiffies;
+ int ret;
+
+ /* Use doorbell for Skyrim and mailbox for Cezanne */
+ if (boot_cpu_data.x86 == 25 && boot_cpu_data.x86_model == 80)
+ ret = psp_send_i2c_req_amdi0019(i2c_req_type);
+ else
+ ret = psp_ring_platform_doorbell(i2c_req_type);
+
if (ret) {
dev_err(psp_i2c_dev, "PSP communication error\n");
goto cleanup;
@@ -115,7 +124,6 @@ static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
psp_i2c_mbox_fail = true;
}
- kfree(req);
return ret;
}
Skyrim doesn't use the platform feature mailbox for communication for I2C arbitration, it relies upon ringing a doorbell. Link: https://lore.kernel.org/linux-i2c/20220916131854.687371-3-jsd@semihalf.com/ Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> --- v2->v3: * Use CPU ID rather than ACPI ID, this will be pushed to a later patch v1->v2: * New patch doorbell; get status field --- drivers/i2c/busses/i2c-designware-amdpsp.c | 28 ++++++++++++++-------- 1 file changed, 18 insertions(+), 10 deletions(-)