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authorMika Westerberg <mika.westerberg@linux.intel.com>2020-06-17 19:04:09 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2020-09-03 12:06:40 +0300
commit49f2a7f4cdaccb21ad964f6d8645ea3a0ec79293 (patch)
treedc88bf75b3c5845d81eb17e130c1c9937a204c59 /drivers/thunderbolt
parent59ed8dcad6c87ced975fe55364bd0c7698e2b261 (diff)
thunderbolt: Use bit 31 to check if Firmware CM is running in Tiger Lake
In Tiger Lake the Firmware CM is always enabled (so bit 0 is always set) but it may be in "pass through" mode which means it requires Software CM instead. This can be determined by checking bit 31 instead. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
-rw-r--r--drivers/thunderbolt/icm.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index ffcc8c3459e5..b51fc3f62b1f 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -1635,11 +1635,14 @@ static void icm_icl_rtd3_veto(struct tb *tb, const struct icm_pkg_header *hdr)
static bool icm_tgl_is_supported(struct tb *tb)
{
+ u32 val;
+
/*
* If the firmware is not running use software CM. This platform
* should fully support both.
*/
- return icm_firmware_running(tb->nhi);
+ val = ioread32(tb->nhi->iobase + REG_FW_STS);
+ return !!(val & REG_FW_STS_NVM_AUTH_DONE);
}
static void icm_handle_notification(struct work_struct *work)