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authorGil Fine <gil.fine@intel.com>2021-06-01 16:32:29 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2021-06-11 11:42:54 +0300
commit0172e411450a479d65061014edf48933d4209c93 (patch)
tree0c25d4d9d1b037b52ae5947467371bf42f8a498c /drivers/thunderbolt
parent349bfe089d02f18b05ed2c386eeb248a0be49641 (diff)
downloadlinux-0172e411450a479d65061014edf48933d4209c93.tar.xz
thunderbolt: Poll 10ms for REG_FW_STS_NVM_AUTH_DONE to be set
In Intel Tiger Lake and beyond it takes some time after the force power is set until the firmware connection manager is ready. So instead of reading it once we poll it for 10ms before giving up. Signed-off-by: Gil Fine <gil.fine@intel.com> Reviewed-by: Yehezkel Bernat <YehezkelShB@gmail.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
-rw-r--r--drivers/thunderbolt/icm.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index 2f30b816705a..0f25cf9fe519 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -1677,14 +1677,18 @@ 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;
+ unsigned long end = jiffies + msecs_to_jiffies(10);
- /*
- * If the firmware is not running use software CM. This platform
- * should fully support both.
- */
- val = ioread32(tb->nhi->iobase + REG_FW_STS);
- return !!(val & REG_FW_STS_NVM_AUTH_DONE);
+ do {
+ u32 val;
+
+ val = ioread32(tb->nhi->iobase + REG_FW_STS);
+ if (val & REG_FW_STS_NVM_AUTH_DONE)
+ return true;
+ usleep_range(100, 500);
+ } while (time_before(jiffies, end));
+
+ return false;
}
static void icm_handle_notification(struct work_struct *work)