[PATCH 08/10] platform/x86: thinkpad_acpi: Register a privacy-screen device
Register a privacy-screen device on laptops with a privacy-screen, this exports the PrivacyGuard features to user-space using a standardized vendor-agnostic sysfs interface. Note the sysfs interface is read-only. Registering a privacy-screen device with the new privacy-screen class code will also allow the GPU driver to get a handle to it and export the privacy-screen setting as a property on the DRM connector object for the LCD panel. This DRM connector property is a new standardized interface which all user-space code should use to query and control the privacy-screen. Reviewed-by: Emil Velikov Reviewed-by: Lyude Paul Signed-off-by: Hans de Goede --- Changes in v3: - On receiving a TP_HKEY_EV_PRIVACYGUARD_TOGGLE event only call drm_privacy_screen_call_notifier_chain() if the privacy-screen state has actually changed Changes in v2: - Make the new lcdshadow_set_sw_state, lcdshadow_get_hw_state and lcdshadow_ops symbols static - Update state and call drm_privacy_screen_call_notifier_chain() when the state is changed by pressing the Fn + D hotkey combo --- drivers/platform/x86/Kconfig | 2 + drivers/platform/x86/thinkpad_acpi.c | 97 +--- 2 files changed, 74 insertions(+), 25 deletions(-) diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index e21ea3d23e6f..20208207e366 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -501,7 +501,9 @@ config THINKPAD_ACPI depends on ACPI_VIDEO || ACPI_VIDEO = n depends on BACKLIGHT_CLASS_DEVICE depends on I2C + depends on DRM select ACPI_PLATFORM_PROFILE + select DRM_PRIVACY_SCREEN select HWMON select NVRAM select NEW_LEDS diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index b8f2556c4797..291cd18c9c8f 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -73,6 +73,7 @@ #include #include #include +#include #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 */ @@ -3889,6 +3891,12 @@ 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. @@ -9819,30 +9827,40 @@ static struct ibm_struct battery_driver_data = { * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature */ +static struct drm_privacy_screen *lcdshadow_dev; static acpi_handle lcdshadow_get_handle; static acpi_handle lcdshadow_set_handle; -static int lcdshadow_state; -static int lcdshadow_on_off(bool state) +static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv, + enum drm_privacy_screen_status state) { int output; + if (WARN_ON(!mutex_is_locked(&priv->lock))) + return -EIO; + 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_status status1, status2; @@ -9850,36 +9868,44 @@ static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); status2 = acpi_get_handle(hkey_handle, "", &lcdshadow_set_handle); - if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) { - lcdshadow_state = -ENODEV; + if (ACPI_FAILURE(status1) || ACPI_FAILURE(s
[PATCH 08/10] platform/x86: thinkpad_acpi: Register a privacy-screen device
Register a privacy-screen device on laptops with a privacy-screen, this exports the PrivacyGuard features to user-space using a standardized vendor-agnostic sysfs interface. Note the sysfs interface is read-only. Registering a privacy-screen device with the new privacy-screen class code will also allow the GPU driver to get a handle to it and export the privacy-screen setting as a property on the DRM connector object for the LCD panel. This DRM connector property is a new standardized interface which all user-space code should use to query and control the privacy-screen. Reviewed-by: Emil Velikov Reviewed-by: Lyude Paul Signed-off-by: Hans de Goede --- Changes in v3: - On receiving a TP_HKEY_EV_PRIVACYGUARD_TOGGLE event only call drm_privacy_screen_call_notifier_chain() if the privacy-screen state has actually changed Changes in v2: - Make the new lcdshadow_set_sw_state, lcdshadow_get_hw_state and lcdshadow_ops symbols static - Update state and call drm_privacy_screen_call_notifier_chain() when the state is changed by pressing the Fn + D hotkey combo --- drivers/platform/x86/Kconfig | 2 + drivers/platform/x86/thinkpad_acpi.c | 97 +--- 2 files changed, 74 insertions(+), 25 deletions(-) diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index e21ea3d23e6f..20208207e366 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -501,7 +501,9 @@ config THINKPAD_ACPI depends on ACPI_VIDEO || ACPI_VIDEO = n depends on BACKLIGHT_CLASS_DEVICE depends on I2C + depends on DRM select ACPI_PLATFORM_PROFILE + select DRM_PRIVACY_SCREEN select HWMON select NVRAM select NEW_LEDS diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index b8f2556c4797..291cd18c9c8f 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -73,6 +73,7 @@ #include #include #include +#include #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 */ @@ -3889,6 +3891,12 @@ 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. @@ -9819,30 +9827,40 @@ static struct ibm_struct battery_driver_data = { * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature */ +static struct drm_privacy_screen *lcdshadow_dev; static acpi_handle lcdshadow_get_handle; static acpi_handle lcdshadow_set_handle; -static int lcdshadow_state; -static int lcdshadow_on_off(bool state) +static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv, + enum drm_privacy_screen_status state) { int output; + if (WARN_ON(!mutex_is_locked(&priv->lock))) + return -EIO; + 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_status status1, status2; @@ -9850,36 +9868,44 @@ static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); status2 = acpi_get_handle(hkey_handle, "", &lcdshadow_set_handle); - if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) { - lcdshadow_state = -ENODEV; + if (ACPI_FAILURE(status1) || ACPI_FAILURE(s