From: Shuduo Sang <shuduo.s...@canonical.com> The Thinkpad X1 Carbon 2nd generation (2014) ships with BIOS that will return HKEY interface version 0x200. It needs thinkpad-acpi support otherwise it will be routed to wrong branch and the hotkey mask will be wrong.
https://bugzilla.kernel.org/show_bug.cgi?id=114731 Signed-off-by: Bruce Ma <bruce...@canonical.com> Signed-off-by: Shuduo Sang <shuduo.s...@canonical.com> --- drivers/platform/x86/thinkpad_acpi.c | 35 ++++++++++++++++++++++++++++++----- 1 file changed, 30 insertions(+), 5 deletions(-) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index dad2984..c177936 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -3357,11 +3357,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking for HKEY interface version 0x100 */ if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { - if ((hkeyv >> 8) != 1) { - pr_err("unknown version of the HKEY interface: 0x%x\n", - hkeyv); - pr_err("please report this to %s\n", TPACPI_MAIL); - } else { + switch (hkeyv >> 8) { + case 1: /* * MHKV 0x100 in A31, R40, R40e, * T4x, X31, and later @@ -3381,6 +3378,34 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) } else { tp_features.hotkey_mask = 1; } + break; + + case 2: + /* + * MHKV 0x200 in X1 + */ + vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, + "firmware HKEY interface version: 0x%x\n", + hkeyv); + + /* Paranoia check AND init hotkey_all_mask */ + if (!acpi_evalf(hkey_handle, &hotkey_all_mask, + "MHKA", "dd", 1)) { + pr_err("missing MHKA handler, " + "please report this to %s\n", + TPACPI_MAIL); + /* Fallback: pre-init for FN+F3,F4,F12 */ + hotkey_all_mask = 0x080cU; + } else { + tp_features.hotkey_mask = 1; + } + break; + + default: + pr_err("unknown version of the HKEY interface: 0x%x\n", + hkeyv); + pr_err("please report this to %s\n", TPACPI_MAIL); + break; } } -- 2.7.3 ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
