Add a patch to filter false positive kbd backlight change events (#1514969)
Add a patch to disable runtime-pm for QCA bluetooth devices (#1514836)
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Hans de Goede
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b23e66e346
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From a5ffa27c07e06900fcfc50b08de6d11e45830168 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Wed, 3 Jan 2018 12:49:44 +0100
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Subject: [PATCH v2] Bluetooth: btusb: Disable autosuspend on QCA Rome devices
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Commit fd865802c66b ("Bluetooth: btusb: fix QCA Rome suspend/resume") fixes
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a suspend/resume problem on QCA devices by doing a full reset on resume,
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reloading the firmware.
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A similar problem happens when using runtime-pm / autosuspend, when this is
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enabled by the user the QCA Rome device stops working. Reloading the
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firmware after a runtime suspend is not really an option since the latency
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caused by this is unacceptable.
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To fix the runtime-pm issues, this commit disables runtime-pm on QCA Rome
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HCIs, by getting (and not releasing) an usb autopm reference on the btusb
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interface.
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BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514836
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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drivers/bluetooth/btusb.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
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index 808c249845db..6ed3a0e5b8f6 100644
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--- a/drivers/bluetooth/btusb.c
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+++ b/drivers/bluetooth/btusb.c
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@@ -3122,8 +3122,15 @@ static int btusb_probe(struct usb_interface *intf,
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/* QCA Rome devices lose their updated firmware over suspend,
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* but the USB hub doesn't notice any status change.
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* Explicitly request a device reset on resume.
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+ * And disable runtime pm by getting a pm reference, the USB
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+ * core will drop our reference on disconnect.
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*/
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set_bit(BTUSB_RESET_RESUME, &data->flags);
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+ err = usb_autopm_get_interface(data->intf);
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+ if (err < 0) {
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+ BT_ERR("failed to get pm reference %d", err);
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+ goto out_free_dev;
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+ }
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}
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#ifdef CONFIG_BT_HCIBTUSB_RTL
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--
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2.14.3
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@ -0,0 +1,99 @@
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From 714fe15daa07e7691c9731c88de71aa57f84b6c2 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Wed, 3 Jan 2018 11:13:54 +0100
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Subject: [PATCH] platform/x86: dell-laptop: Filter out spurious keyboard
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backlight change events
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On some Dell XPS models WMI events of type 0x0000 reporting a keycode of
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0xe00c get reported when the brightness of the LCD panel changes.
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This leads to us reporting false-positive kbd_led change events to
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userspace which in turn leads to the kbd backlight OSD showing when it
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should not.
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We already read the current keyboard backlight brightness value when
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reporting events because the led_classdev_notify_brightness_hw_changed
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API requires this. Compare this value to the last known value and filter
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out duplicate events, fixing this.
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Note the fixed issue is esp. a problem on XPS models with an ambient light
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sensor and automatic brightness adjustments turned on, this causes the kbd
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backlight OSD to show all the time there.
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BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514969
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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drivers/platform/x86/dell-laptop.c | 24 ++++++++++++++++++++++--
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1 file changed, 22 insertions(+), 2 deletions(-)
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diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
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index cd4725e7e0b5..2ef3297a9efc 100644
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--- a/drivers/platform/x86/dell-laptop.c
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+++ b/drivers/platform/x86/dell-laptop.c
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@@ -1133,6 +1133,7 @@ static u8 kbd_previous_mode_bit;
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static bool kbd_led_present;
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static DEFINE_MUTEX(kbd_led_mutex);
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+static enum led_brightness kbd_led_level;
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/*
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* NOTE: there are three ways to set the keyboard backlight level.
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@@ -1947,6 +1948,7 @@ static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
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static int kbd_led_level_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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+ enum led_brightness new_value = value;
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struct kbd_state state;
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struct kbd_state new_state;
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u16 num;
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@@ -1976,6 +1978,9 @@ static int kbd_led_level_set(struct led_classdev *led_cdev,
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}
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out:
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+ if (ret == 0)
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+ kbd_led_level = new_value;
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+
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mutex_unlock(&kbd_led_mutex);
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return ret;
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}
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@@ -2003,6 +2008,9 @@ static int __init kbd_led_init(struct device *dev)
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if (kbd_led.max_brightness)
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kbd_led.max_brightness--;
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}
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+
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+ kbd_led_level = kbd_led_level_get(NULL);
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+
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ret = led_classdev_register(dev, &kbd_led);
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if (ret)
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kbd_led_present = false;
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@@ -2027,13 +2035,25 @@ static void kbd_led_exit(void)
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static int dell_laptop_notifier_call(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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+ bool changed = false;
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+ enum led_brightness new_kbd_led_level;
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+
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switch (action) {
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case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
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if (!kbd_led_present)
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break;
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- led_classdev_notify_brightness_hw_changed(&kbd_led,
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- kbd_led_level_get(&kbd_led));
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+ mutex_lock(&kbd_led_mutex);
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+ new_kbd_led_level = kbd_led_level_get(&kbd_led);
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+ if (kbd_led_level != new_kbd_led_level) {
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+ kbd_led_level = new_kbd_led_level;
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+ changed = true;
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+ }
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+ mutex_unlock(&kbd_led_mutex);
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+
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+ if (changed)
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+ led_classdev_notify_brightness_hw_changed(&kbd_led,
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+ kbd_led_level);
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break;
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}
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--
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2.14.3
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10
kernel.spec
10
kernel.spec
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@ -650,6 +650,12 @@ Patch638: 0003-ahci-Allow-setting-a-default-LPM-policy-for-mobile-c.patch
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# KPTI Fixups
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Patch639: kpti-fix.patch
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# rhbz1514969, submitted upstream
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Patch640: 0001-platform-x86-dell-laptop-Filter-out-spurious-keyboar.patch
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# rhbz1514836, submitted upstream
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Patch641: 0001-Bluetooth-btusb-Disable-autosuspend-on-QCA-Rome-devi.patch
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# END OF PATCH DEFINITIONS
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%endif
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@ -2201,6 +2207,10 @@ fi
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#
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#
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%changelog
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* Thu Jan 04 2018 Hans de Goede <hdegoede@redhat.com>
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- Add a patch to filter false positive kbd backlight change events (#1514969)
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- Add a patch to disable runtime-pm for QCA bluetooth devices (#1514836)
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* Wed Jan 03 2018 Laura Abbott <labbott@redhat.com> - 4.15.0-0.rc6.git0.3
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- Yet another KPTI fix
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