[PATCH 1/7][SRU][OEM-5.14] HID: amd_sfh: Add command response to check command status
Alex Hung
alex.hung at canonical.com
Mon Feb 21 05:52:51 UTC 2022
From: Basavaraj Natikar <Basavaraj.Natikar at amd.com>
BugLink: https://bugs.launchpad.net/bugs/1961121
Sometimes sensor enable/disable may take time, without checking the
actual status bits from MP2 FW can lead the amd-sfh to misbehave.
Hence add a status check of enable/disable command
by waiting on the command response before sending the next
command to FW.
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k at amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar at amd.com>
Signed-off-by: Jiri Kosina <jkosina at suse.cz>
(cherry picked from commit 173709f50e98df4c49c2776834605a2f7ed3e681)
Signed-off-by: Alex Hung <alex.hung at canonical.com>
---
drivers/hid/amd-sfh-hid/amd_sfh_client.c | 40 ++++++++++++++++++++++++--------
drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 16 +++++++++++++
drivers/hid/amd-sfh-hid/amd_sfh_pcie.h | 18 ++++++++++++++
3 files changed, 64 insertions(+), 10 deletions(-)
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index 4710b9a..b7b66a1 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -123,14 +123,24 @@ static void amd_sfh_work_buffer(struct work_struct *work)
int i;
for (i = 0; i < cli_data->num_hid_devices; i++) {
- report_size = get_input_report(i, cli_data->sensor_idx[i], cli_data->report_id[i],
- in_data);
- hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
- in_data->input_report[i], report_size, 0);
+ if (cli_data->sensor_sts[i] == SENSOR_ENABLED) {
+ report_size = get_input_report
+ (i, cli_data->sensor_idx[i], cli_data->report_id[i], in_data);
+ hid_input_report(cli_data->hid_sensor_hubs[i], HID_INPUT_REPORT,
+ in_data->input_report[i], report_size, 0);
+ }
}
schedule_delayed_work(&cli_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
}
+u32 amd_sfh_wait_for_response(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
+{
+ if (mp2->mp2_ops->response)
+ sensor_sts = mp2->mp2_ops->response(mp2, sid, sensor_sts);
+
+ return sensor_sts;
+}
+
int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
{
struct amd_input_data *in_data = &privdata->in_data;
@@ -139,8 +149,8 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
struct device *dev;
u32 feature_report_size;
u32 input_report_size;
+ int rc, i, status;
u8 cl_idx;
- int rc, i;
dev = &privdata->pdev->dev;
@@ -155,7 +165,7 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
&cl_data->sensor_dma_addr[i],
GFP_KERNEL);
- cl_data->sensor_sts[i] = 0;
+ cl_data->sensor_sts[i] = SENSOR_DISABLED;
cl_data->sensor_requested_cnt[i] = 0;
cl_data->cur_hid_dev = i;
cl_idx = cl_data->sensor_idx[i];
@@ -201,7 +211,10 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
if (rc)
return rc;
privdata->mp2_ops->start(privdata, info);
- cl_data->sensor_sts[i] = 1;
+ status = amd_sfh_wait_for_response
+ (privdata, cl_data->sensor_idx[i], SENSOR_ENABLED);
+ if (status == SENSOR_ENABLED)
+ cl_data->sensor_sts[i] = SENSOR_ENABLED;
}
schedule_delayed_work(&cl_data->work_buffer, msecs_to_jiffies(AMD_SFH_IDLE_LOOP));
return 0;
@@ -224,10 +237,17 @@ int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
{
struct amdtp_cl_data *cl_data = privdata->cl_data;
struct amd_input_data *in_data = cl_data->in_data;
- int i;
+ int i, status;
- for (i = 0; i < cl_data->num_hid_devices; i++)
- privdata->mp2_ops->stop(privdata, i);
+ for (i = 0; i < cl_data->num_hid_devices; i++) {
+ if (cl_data->sensor_sts[i] == SENSOR_ENABLED) {
+ privdata->mp2_ops->stop(privdata, cl_data->sensor_idx[i]);
+ status = amd_sfh_wait_for_response
+ (privdata, cl_data->sensor_idx[i], SENSOR_DISABLED);
+ if (status != SENSOR_ENABLED)
+ cl_data->sensor_sts[i] = SENSOR_DISABLED;
+ }
+ }
cancel_delayed_work_sync(&cl_data->work);
cancel_delayed_work_sync(&cl_data->work_buffer);
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index 1b4a192..ef2df3b 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -13,6 +13,7 @@
#include <linux/dmi.h>
#include <linux/interrupt.h>
#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/slab.h>
@@ -31,6 +32,20 @@ static int sensor_mask_override = -1;
module_param_named(sensor_mask, sensor_mask_override, int, 0444);
MODULE_PARM_DESC(sensor_mask, "override the detected sensors mask");
+static int amd_sfh_wait_response_v2(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts)
+{
+ union cmd_response cmd_resp;
+
+ /* Get response with status within a max of 800 ms timeout */
+ if (!readl_poll_timeout(mp2->mmio + AMD_P2C_MSG(0), cmd_resp.resp,
+ (cmd_resp.response_v2.response == sensor_sts &&
+ cmd_resp.response_v2.status == 0 && (sid == 0xff ||
+ cmd_resp.response_v2.sensor_id == sid)), 500, 800000))
+ return cmd_resp.response_v2.response;
+
+ return SENSOR_DISABLED;
+}
+
static void amd_start_sensor_v2(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info)
{
union sfh_cmd_base cmd_base;
@@ -183,6 +198,7 @@ static const struct amd_mp2_ops amd_sfh_ops_v2 = {
.start = amd_start_sensor_v2,
.stop = amd_stop_sensor_v2,
.stop_all = amd_stop_all_sensor_v2,
+ .response = amd_sfh_wait_response_v2,
};
static const struct amd_mp2_ops amd_sfh_ops = {
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
index 2d5c57e..21ef55d 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
@@ -24,12 +24,16 @@
#define AMD_C2P_MSG2 0x10508
#define AMD_C2P_MSG(regno) (0x10500 + ((regno) * 4))
+#define AMD_P2C_MSG(regno) (0x10680 + ((regno) * 4))
/* MP2 P2C Message Registers */
#define AMD_P2C_MSG3 0x1068C /* Supported Sensors info */
#define V2_STATUS 0x2
+#define SENSOR_ENABLED 4
+#define SENSOR_DISABLED 5
+
#define HPD_IDX 16
/* SFH Command register */
@@ -51,6 +55,19 @@ union sfh_cmd_base {
} cmd_v2;
};
+union cmd_response {
+ u32 resp;
+ struct {
+ u32 status : 2;
+ u32 out_in_c2p : 1;
+ u32 rsvd1 : 1;
+ u32 response : 4;
+ u32 sub_cmd : 8;
+ u32 sensor_id : 6;
+ u32 rsvd2 : 10;
+ } response_v2;
+};
+
union sfh_cmd_param {
u32 ul;
struct {
@@ -117,5 +134,6 @@ struct amd_mp2_ops {
void (*start)(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info);
void (*stop)(struct amd_mp2_dev *privdata, u16 sensor_idx);
void (*stop_all)(struct amd_mp2_dev *privdata);
+ int (*response)(struct amd_mp2_dev *mp2, u8 sid, u32 sensor_sts);
};
#endif
--
2.7.4
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