diff options
Diffstat (limited to 'drivers/platform/x86/thinkpad_acpi.c')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 137 |
1 files changed, 95 insertions, 42 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index bb1abb947e1e..341655d711ce 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -73,6 +73,7 @@ #include <linux/uaccess.h> #include <acpi/battery.h> #include <acpi/video.h> +#include <drm/drm_privacy_screen_driver.h> #include "dual_accel_detect.h" /* ThinkPad CMOS commands */ @@ -157,6 +158,7 @@ enum tpacpi_hkey_event_t { TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ + TP_HKEY_EV_PRIVACYGUARD_TOGGLE = 0x130f, /* Toggle priv.guard on/off */ /* Reasons for waking up from S3/S4 */ TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ @@ -3788,6 +3790,30 @@ static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) } } +static bool hotkey_notify_extended_hotkey(const u32 hkey) +{ + unsigned int scancode; + + switch (hkey) { + case TP_HKEY_EV_PRIVACYGUARD_TOGGLE: + tpacpi_driver_event(hkey); + return true; + } + + /* Extended keycodes start at 0x300 and our offset into the map + * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode + * will be positive, but might not be in the correct range. + */ + scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); + if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && + scancode < TPACPI_HOTKEY_MAP_LEN) { + tpacpi_input_send_key(scancode); + return true; + } + + return false; +} + static bool hotkey_notify_hotkey(const u32 hkey, bool *send_acpi_ev, bool *ignore_acpi_ev) @@ -3822,17 +3848,7 @@ static bool hotkey_notify_hotkey(const u32 hkey, return adaptive_keyboard_hotkey_notify_hotkey(scancode); case 3: - /* Extended keycodes start at 0x300 and our offset into the map - * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode - * will be positive, but might not be in the correct range. - */ - scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); - if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && - scancode < TPACPI_HOTKEY_MAP_LEN) { - tpacpi_input_send_key(scancode); - return true; - } - break; + return hotkey_notify_extended_hotkey(hkey); } return false; @@ -9715,69 +9731,85 @@ static struct ibm_struct battery_driver_data = { * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature */ -static int lcdshadow_state; +static struct drm_privacy_screen *lcdshadow_dev; +static acpi_handle lcdshadow_get_handle; +static acpi_handle lcdshadow_set_handle; -static int lcdshadow_on_off(bool state) +static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv, + enum drm_privacy_screen_status state) { - acpi_handle set_shadow_handle; int output; - if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { - pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); + if (WARN_ON(!mutex_is_locked(&priv->lock))) return -EIO; - } - if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) + if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state)) return -EIO; - lcdshadow_state = state; + priv->hw_state = priv->sw_state = state; return 0; } -static int lcdshadow_set(bool on) +static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv) { - if (lcdshadow_state < 0) - return lcdshadow_state; - if (lcdshadow_state == on) - return 0; - return lcdshadow_on_off(on); + int output; + + if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) + return; + + priv->hw_state = priv->sw_state = output & 0x1; } +static const struct drm_privacy_screen_ops lcdshadow_ops = { + .set_sw_state = lcdshadow_set_sw_state, + .get_hw_state = lcdshadow_get_hw_state, +}; + static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) { - acpi_handle get_shadow_handle; + acpi_status status1, status2; int output; - if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { - lcdshadow_state = -ENODEV; + status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); + status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle); + if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) return 0; - } - if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { - lcdshadow_state = -EIO; + if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) return -EIO; - } - if (!(output & 0x10000)) { - lcdshadow_state = -ENODEV; + + if (!(output & 0x10000)) return 0; - } - lcdshadow_state = output & 0x1; + + lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev, + &lcdshadow_ops); + if (IS_ERR(lcdshadow_dev)) + return PTR_ERR(lcdshadow_dev); return 0; } +static void lcdshadow_exit(void) +{ + drm_privacy_screen_unregister(lcdshadow_dev); +} + static void lcdshadow_resume(void) { - if (lcdshadow_state >= 0) - lcdshadow_on_off(lcdshadow_state); + if (!lcdshadow_dev) + return; + + mutex_lock(&lcdshadow_dev->lock); + lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state); + mutex_unlock(&lcdshadow_dev->lock); } static int lcdshadow_read(struct seq_file *m) { - if (lcdshadow_state < 0) { + if (!lcdshadow_dev) { seq_puts(m, "status:\t\tnot supported\n"); } else { - seq_printf(m, "status:\t\t%d\n", lcdshadow_state); + seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state); seq_puts(m, "commands:\t0, 1\n"); } @@ -9789,7 +9821,7 @@ static int lcdshadow_write(char *buf) char *cmd; int res, state = -EINVAL; - if (lcdshadow_state < 0) + if (!lcdshadow_dev) return -ENODEV; while ((cmd = strsep(&buf, ","))) { @@ -9801,11 +9833,18 @@ static int lcdshadow_write(char *buf) if (state >= 2 || state < 0) return -EINVAL; - return lcdshadow_set(state); + mutex_lock(&lcdshadow_dev->lock); + res = lcdshadow_set_sw_state(lcdshadow_dev, state); + mutex_unlock(&lcdshadow_dev->lock); + + drm_privacy_screen_call_notifier_chain(lcdshadow_dev); + + return res; } static struct ibm_struct lcdshadow_driver_data = { .name = "lcdshadow", + .exit = lcdshadow_exit, .resume = lcdshadow_resume, .read = lcdshadow_read, .write = lcdshadow_write, @@ -10615,6 +10654,20 @@ static void tpacpi_driver_event(const unsigned int hkey_event) if (!atomic_add_unless(&dytc_ignore_event, -1, 0)) dytc_profile_refresh(); } + + if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) { + enum drm_privacy_screen_status old_hw_state; + bool changed; + + mutex_lock(&lcdshadow_dev->lock); + old_hw_state = lcdshadow_dev->hw_state; + lcdshadow_get_hw_state(lcdshadow_dev); + changed = lcdshadow_dev->hw_state != old_hw_state; + mutex_unlock(&lcdshadow_dev->lock); + + if (changed) + drm_privacy_screen_call_notifier_chain(lcdshadow_dev); + } } static void hotkey_driver_event(const unsigned int scancode) |