Backport of some patches currently waiting to get accepted upstream, adds support for detecting tablet mode properly on the X1 Yoga.
Lyude (2): thinkpad_acpi: Move tablet detection into separate function thinkpad_acpi: Add support for X1 Yoga (2016) Tablet Mode
Documentation/laptops/thinkpad-acpi.txt | 1 + drivers/platform/x86/thinkpad_acpi.c | 89 ++++++++++++++++++++++++++------- 2 files changed, 72 insertions(+), 18 deletions(-)
The hotkey events and ACPI handles used for detecting tablet mode on a few of the newer thinkpad models (Yoga X1 and the Yoga 260 specifically) have been changed around, so unfortunately this means we're definitely going to need to probe for multiple types of tablet mode support. Since the hotkey_init() is already a lot larger than it should be, let's split up this detection into its own function to make things a little easier to read.
As well, since we're going to have multiple types of tablet modes, make hotkey_tablet into an enum so we can also use it to indicate the type of tablet mode reporting the machine supports.
Suggested by Daniel Martin consume.noise@gmail.com Signed-off-by: Lyude lyude@redhat.com Cc: Daniel Martin consume.noise@gmail.com Acked-by: Henrique de Moraes Holschuh hmh@hmh.eng.br
Signed-off-by: Lyude lyude@redhat.com --- drivers/platform/x86/thinkpad_acpi.c | 52 +++++++++++++++++++++++++----------- 1 file changed, 37 insertions(+), 15 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index b65ce75..de4e734 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -302,7 +302,10 @@ static struct { u32 hotkey:1; u32 hotkey_mask:1; u32 hotkey_wlsw:1; - u32 hotkey_tablet:1; + enum { + TP_HOTKEY_TABLET_NONE = 0, + TP_HOTKEY_TABLET_USES_MHKG, + } hotkey_tablet; u32 kbdlight:1; u32 light:1; u32 light_status:1; @@ -3117,6 +3120,32 @@ static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { typedef u16 tpacpi_keymap_entry_t; typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
+static int hotkey_init_tablet_mode(void) +{ + int in_tablet_mode, res; + char *type; + + /* For X41t, X60t, X61t Tablets... */ + if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { + tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; + in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); + type = "MHKG"; + } + + if (!tp_features.hotkey_tablet) + return 0; + + pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", + type, in_tablet_mode ? "tablet" : "laptop"); + + res = add_to_attr_set(hotkey_dev_attributes, + &dev_attr_hotkey_tablet_mode.attr); + if (res) + return -1; + + return in_tablet_mode; +} + static int __init hotkey_init(struct ibm_init_struct *iibm) { /* Requirements for changing the default keymaps: @@ -3464,21 +3493,14 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) res = add_to_attr_set(hotkey_dev_attributes, &dev_attr_hotkey_radio_sw.attr);
- /* For X41t, X60t, X61t Tablets... */ - if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { - tp_features.hotkey_tablet = 1; - tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); - pr_info("possible tablet mode switch found; " - "ThinkPad in %s mode\n", - (tabletsw_state) ? "tablet" : "laptop"); - res = add_to_attr_set(hotkey_dev_attributes, - &dev_attr_hotkey_tablet_mode.attr); - } + res = hotkey_init_tablet_mode(); + if (res < 0) + goto err_exit;
- if (!res) - res = register_attr_set_with_sysfs( - hotkey_dev_attributes, - &tpacpi_pdev->dev.kobj); + tabletsw_state = res; + + res = register_attr_set_with_sysfs(hotkey_dev_attributes, + &tpacpi_pdev->dev.kobj); if (res) goto err_exit;
For whatever reason, the X1 Yoga doesn't support the normal method of querying for tablet mode. Instead of providing the MHKG method under the hotkey handle, we're instead given the CMMD method under the EC handle. Values on this handle are either 0x1, laptop mode, or 0x6, tablet mode.
Tested-by: Daniel Martin consume.noise@gmail.com Signed-off-by: Lyude lyude@redhat.com --- Documentation/laptops/thinkpad-acpi.txt | 1 + drivers/platform/x86/thinkpad_acpi.c | 39 +++++++++++++++++++++++++++++---- 2 files changed, 36 insertions(+), 4 deletions(-)
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index 72a150d..ba2e7d2 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt @@ -540,6 +540,7 @@ Events that are propagated by the driver to userspace: 0x6022 ALARM: a sensor is extremely hot 0x6030 System thermal table changed 0x6040 Nvidia Optimus/AC adapter related (TO BE VERIFIED) +0x60C0 X1 Yoga 2016, Tablet mode status changed
Battery nearly empty alarms are a last resort attempt to get the operating system to hibernate or shutdown cleanly (0x2313), or shutdown diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index de4e734..700b8c8 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -190,6 +190,9 @@ enum tpacpi_hkey_event_t { TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ + TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): + * enter/leave tablet mode + */ TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ @@ -305,6 +308,8 @@ static struct { enum { TP_HOTKEY_TABLET_NONE = 0, TP_HOTKEY_TABLET_USES_MHKG, + /* X1 Yoga 2016, seen on BIOS N1FET44W */ + TP_HOTKEY_TABLET_USES_CMMD, } hotkey_tablet; u32 kbdlight:1; u32 light:1; @@ -2062,6 +2067,8 @@ static void hotkey_poll_setup(const bool may_warn);
/* HKEY.MHKG() return bits */ #define TP_HOTKEY_TABLET_MASK (1 << 3) +/* ThinkPad X1 Yoga (2016) */ +#define TP_EC_CMMD_TABLET_MODE 0x6
static int hotkey_get_wlsw(void) { @@ -2086,10 +2093,23 @@ static int hotkey_get_tablet_mode(int *status) { int s;
- if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) - return -EIO; + switch (tp_features.hotkey_tablet) { + case TP_HOTKEY_TABLET_USES_MHKG: + if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) + return -EIO; + + *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); + break; + case TP_HOTKEY_TABLET_USES_CMMD: + if (!acpi_evalf(ec_handle, &s, "CMMD", "d")) + return -EIO; + + *status = (s == TP_EC_CMMD_TABLET_MODE); + break; + default: + break; + }
- *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); return 0; }
@@ -3125,11 +3145,16 @@ static int hotkey_init_tablet_mode(void) int in_tablet_mode, res; char *type;
- /* For X41t, X60t, X61t Tablets... */ if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { + /* For X41t, X60t, X61t Tablets... */ tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); type = "MHKG"; + } else if (acpi_evalf(ec_handle, &res, "CMMD", "qd")) { + /* For X1 Yoga (2016) */ + tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_CMMD; + in_tablet_mode = res == TP_EC_CMMD_TABLET_MODE; + type = "CMMD"; }
if (!tp_features.hotkey_tablet) @@ -3921,6 +3946,12 @@ static bool hotkey_notify_6xxx(const u32 hkey, *ignore_acpi_ev = true; return true;
+ case TP_HKEY_EV_TABLET_CHANGED: + tpacpi_input_send_tabletsw(); + hotkey_tablet_mode_notify_change(); + *send_acpi_ev = false; + break; + default: pr_warn("unknown possible thermal alarm or keyboard event received\n"); known = false;
kernel@lists.fedoraproject.org
-
Lyude