diff options
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 39 |
1 files changed, 23 insertions, 16 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index a521b6b3797e..846e0617eb9b 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -92,6 +92,14 @@ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY; module_param(ec_delay, uint, 0644); MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes"); +static bool ec_busy_polling __read_mostly; +module_param(ec_busy_polling, bool, 0644); +MODULE_PARM_DESC(ec_busy_polling, "Use busy polling to advance EC transaction"); + +static unsigned int ec_polling_guard __read_mostly = ACPI_EC_UDELAY_POLL; +module_param(ec_polling_guard, uint, 0644); +MODULE_PARM_DESC(ec_polling_guard, "Guard time(us) between EC accesses in polling modes"); + /* * If the number of false interrupts per one transaction exceeds * this threshold, will think there is a GPE storm happened and @@ -128,7 +136,6 @@ static void advance_transaction(struct acpi_ec *ec); struct acpi_ec *boot_ec, *first_ec; EXPORT_SYMBOL(first_ec); -static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */ @@ -504,11 +511,11 @@ static void start_transaction(struct acpi_ec *ec) static int ec_guard(struct acpi_ec *ec) { - unsigned long guard = usecs_to_jiffies(ACPI_EC_UDELAY_POLL); + unsigned long guard = usecs_to_jiffies(ec_polling_guard); unsigned long timeout = ec->timestamp + guard; do { - if (EC_FLAGS_MSI) { + if (ec_busy_polling) { /* Perform busy polling */ if (ec_transaction_completed(ec)) return 0; @@ -985,7 +992,7 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address, if (function != ACPI_READ && function != ACPI_WRITE) return AE_BAD_PARAMETER; - if (EC_FLAGS_MSI || bits > 8) + if (ec_busy_polling || bits > 8) acpi_ec_burst_enable(ec); for (i = 0; i < bytes; ++i, ++address, ++value) @@ -993,7 +1000,7 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address, acpi_ec_read(ec, address, value) : acpi_ec_write(ec, address, *value); - if (EC_FLAGS_MSI || bits > 8) + if (ec_busy_polling || bits > 8) acpi_ec_burst_disable(ec); switch (result) { @@ -1262,11 +1269,11 @@ static int ec_validate_ecdt(const struct dmi_system_id *id) return 0; } -/* MSI EC needs special treatment, enable it */ -static int ec_flag_msi(const struct dmi_system_id *id) +/* EC firmware needs special polling mode, enable it */ +static int ec_use_busy_polling(const struct dmi_system_id *id) { - pr_debug("Detected MSI hardware, enabling workarounds.\n"); - EC_FLAGS_MSI = 1; + pr_debug("Detected the EC firmware requiring busy polling mode.\n"); + ec_busy_polling = 1; EC_FLAGS_VALIDATE_ECDT = 1; return 0; } @@ -1313,27 +1320,27 @@ static struct dmi_system_id ec_dmi_table[] __initdata = { DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL}, { - ec_flag_msi, "MSI hardware", { + ec_use_busy_polling, "MSI hardware", { DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL}, { - ec_flag_msi, "MSI hardware", { + ec_use_busy_polling, "MSI hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL}, { - ec_flag_msi, "MSI hardware", { + ec_use_busy_polling, "MSI hardware", { DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL}, { - ec_flag_msi, "MSI hardware", { + ec_use_busy_polling, "MSI hardware", { DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR")}, NULL}, { - ec_flag_msi, "Quanta hardware", { + ec_use_busy_polling, "Quanta hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), DMI_MATCH(DMI_PRODUCT_NAME, "TW8/SW8/DW8"),}, NULL}, { - ec_flag_msi, "Quanta hardware", { + ec_use_busy_polling, "Quanta hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), DMI_MATCH(DMI_PRODUCT_NAME, "TW9/SW9"),}, NULL}, { - ec_flag_msi, "Clevo W350etq", { + ec_use_busy_polling, "Clevo W350etq", { DMI_MATCH(DMI_SYS_VENDOR, "CLEVO CO."), DMI_MATCH(DMI_PRODUCT_NAME, "W35_37ET"),}, NULL}, { |