Merge tag 'drm-misc-next-2021-11-18' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.17:

UAPI Changes:

 * Remove restrictions on DMA_BUF_SET_NAME ioctl
 * connector: State of privacy screen
 * sysfs: Send hotplug uevent

Cross-subsystem Changes:

 * clk/bmc-2835: Fixes

 * dma-buf: Add dma_resv selftest; Error-handling fixes; Add debugfs
   helpers; Remove dma_resv_get_excl_unlocked(); Documentation fixes

 * pwm: Introduce of_pwm_single_xlate()

Core Changes:

 * Support for privacy screens
 * Make drm_irq.c legacy
 * Fix __stack_depot_* name conflict
 * Documentation fixes
 * Fixes and cleanups

 * dp-helper: Reuse 8b/10b link-training delay helpers

 * format-helper: Update interfaces

 * fb-helper: Allocate shadow buffer of correct size

 * gem: Link GEM SHMEM and CMA helpers into separate modules; Use
	    dma_resv iterator; Import DMA_BUF namespace into GEM-helper modules

 * gem/shmem-helper: Interface cleanups

 * scheduler: Grab fence in drm_sched_job_add_implicit_dependencies();
   Lockdep fixes

 * kms-helpers: Link several files from core into the KMS-helper module

Driver Changes:

 * Use dma_resv_iter in several places
 * Fixes and cleanups

 * amdgpu: Use drm_kms_helper_connector_hotplug_event(); Get all fences
   at once

 * bridge: Switch to managed MIPI DSI helpers in several places; Register
   and attach during probe in several places; Convert to YAML in several
   places

 * bridge/anx7625: Support MIPI DPI input; Support HDMI audio; Fixes

 * bridge/dw-hdmi: Allow interlace on bridge

 * bridge/ps8640: Enable PM; Support aux-bus

 * bridge/tc358768: Enabled reference clock; Support pulse mode;
   Modesetting fixes

 * bridge/ti-sn65dsi86: Use regmap_bulk_write(); Implement PWM

 * etnaviv: Get all fences at once

 * gma500: GEM object cleanups; Remove generic drivers in probe function

 * i915: Support VESA panel backlights

 * ingenic: Fixes and cleanups

 * kirin: Adjust probe order

 * kmb: Enable framebuffer console

 * lima: Kconfig fixes

 * meson: Refactoring to supperot DRM_BRIDGE_ATTACH_NO_ENCODER

 * msm: Fixes and cleanups

 * msm/dsi: Adjust probe order

 * omap: Fixes and cleanups

 * nouveau: CRC fixes; Validate LUTs in atomic check; Set HDMI AVI RGB
   quantization to FULL; Fixes and cleanups

 * panel: Support Innolux G070Y2-T02, Vivax TPC-9150, JDI R63452,
   Newhaven 1.8-128160EF, Wanchanglong W552964ABA, Novatek NT35950,
   BOE BF060Y8M, Sony Tulip Truly NT35521; Use dev_err_probe() throughout
   drivers; Fixes and cleanups

 * panel/ili9881c: Orientation fixes

 * radeon: Use dma_resv_wait_timeout()

 * rockchip: Add timeout for DSP hold; Suspend/resume fixes; PLL clock
   fixes; Implement mmap in GEM object functions

 * simpledrm: Support FB_DAMAGE_CLIPS and virtual screen sizes

 * sun4i: Use CMA helpers without vmap support

 * tidss: Fixes and cleanups

 * v3d: Cleanups

 * vc4: Fix HDMI-CEC hang when display is off; Power on HDMI controller
   while disabling; Support 4k@60 Hz modes; Fixes and cleanups

 * video: Convert to sysfs_emit() in several places

 * video/omapfb: Fix fall-through

 * virtio: Overflow fixes

 * xen: Implement mmap as GEM object functions

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YZYZSypIrr+qcih3@linux-uq9g.fritz.box

2 files changed, 97 insertions, 42 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 7400bc5da5be..97e87628eb35 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -517,7 +517,9 @@ 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 b3ac9c3f3b7c..e95aad96bca6 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 */
@@ -3786,6 +3788,30 @@ 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)
@@ -3820,17 +3846,7 @@ 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;
@@ -9713,69 +9729,85 @@ 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");
 	}
 
@@ -9787,7 +9819,7 @@ 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, ","))) {
@@ -9799,11 +9831,18 @@ 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,
@@ -10613,6 +10652,20 @@ 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)