diff options
Diffstat (limited to 'drivers/thunderbolt/icm.c')
| -rw-r--r-- | drivers/thunderbolt/icm.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index 78480b782045..13e88109742e 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -11,6 +11,7 @@ #include <linux/delay.h> #include <linux/mutex.h> +#include <linux/moduleparam.h> #include <linux/pci.h> #include <linux/pm_runtime.h> #include <linux/platform_data/x86/apple.h> @@ -43,6 +44,10 @@ #define ICM_APPROVE_TIMEOUT 10000 /* ms */ #define ICM_MAX_LINK 4 +static bool start_icm; +module_param(start_icm, bool, 0444); +MODULE_PARM_DESC(start_icm, "start ICM firmware if it is not running (default: false)"); + /** * struct icm - Internal connection manager private data * @request_lock: Makes sure only one message is send to ICM at time @@ -350,6 +355,14 @@ static void icm_veto_end(struct tb *tb) } } +static bool icm_firmware_running(const struct tb_nhi *nhi) +{ + u32 val; + + val = ioread32(nhi->iobase + REG_FW_STS); + return !!(val & REG_FW_STS_ICM_EN); +} + static bool icm_fr_is_supported(struct tb *tb) { return !x86_apple_machine; @@ -1381,9 +1394,12 @@ static bool icm_ar_is_supported(struct tb *tb) /* * Starting from Alpine Ridge we can use ICM on Apple machines * as well. We just need to reset and re-enable it first. + * However, only start it if explicitly asked by the user. */ - if (!x86_apple_machine) + if (icm_firmware_running(tb->nhi)) return true; + if (!start_icm) + return false; /* * Find the upstream PCIe port in case we need to do reset @@ -1736,8 +1752,7 @@ static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi) u32 val; /* Check if the ICM firmware is already running */ - val = ioread32(nhi->iobase + REG_FW_STS); - if (val & REG_FW_STS_ICM_EN) + if (icm_firmware_running(nhi)) return 0; dev_dbg(&nhi->pdev->dev, "starting ICM firmware\n"); @@ -2244,7 +2259,7 @@ struct tb *icm_probe(struct tb_nhi *nhi) case PCI_DEVICE_ID_INTEL_ICL_NHI0: case PCI_DEVICE_ID_INTEL_ICL_NHI1: - icm->is_supported = icm_ar_is_supported; + icm->is_supported = icm_fr_is_supported; icm->driver_ready = icm_icl_driver_ready; icm->set_uuid = icm_icl_set_uuid; icm->device_connected = icm_icl_device_connected; |