diff options
| author | Rajmohan Mani <rajmohan.mani@intel.com> | 2020-08-17 17:55:20 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-09-03 11:06:40 +0200 |
| commit | dc4c4bf122ed58f7fc1870c483e2e1dbe6912b2f (patch) | |
| tree | b0283cb8406364c03b8aba5c92b7be3513c933a6 /drivers/thunderbolt | |
| parent | thunderbolt: Use kobj_to_dev() instead of container_of() (diff) | |
| download | linux-dc4c4bf122ed58f7fc1870c483e2e1dbe6912b2f.tar.xz linux-dc4c4bf122ed58f7fc1870c483e2e1dbe6912b2f.zip | |
thunderbolt: Optimize Force Power logic
Currently the "Force Power" logic uses 10 retries, each with a delay of
250 ms. Thunderbolt controllers in Ice Lake and Tiger Lake platforms are
found to complete this in the order of 3 ms or so. Since this delay
is in resume path, surplus delay is effectively affecting runtime PM
resume flows.
Decrease the granularity of the delay to 3 ms and increase the number of
retries so we wait maximum of ~1 s which is the recommended timeout.
This should make runtime resume a bit faster.
Reported-by: Dana Alkattan <dana.alkattan@intel.com>
Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/nhi_ops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/thunderbolt/nhi_ops.c b/drivers/thunderbolt/nhi_ops.c index 6795851aac95..c0d5ccbb10f5 100644 --- a/drivers/thunderbolt/nhi_ops.c +++ b/drivers/thunderbolt/nhi_ops.c @@ -59,7 +59,7 @@ static int icl_nhi_force_power(struct tb_nhi *nhi, bool power) pci_write_config_dword(nhi->pdev, VS_CAP_22, vs_cap); if (power) { - unsigned int retries = 10; + unsigned int retries = 350; u32 val; /* Wait until the firmware tells it is up and running */ @@ -67,7 +67,7 @@ static int icl_nhi_force_power(struct tb_nhi *nhi, bool power) pci_read_config_dword(nhi->pdev, VS_CAP_9, &val); if (val & VS_CAP_9_FW_READY) return 0; - msleep(250); + usleep_range(3000, 3100); } while (--retries); return -ETIMEDOUT; |