From 1f2c9de83a50447a2d7166f6273ab0c0e97cd68e Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 24 Jun 2022 13:23:38 +0200
Subject: [PATCH] platform/x86: panasonic-laptop: don't report duplicate brightness key-presses
Git-commit: 1f2c9de83a50447a2d7166f6273ab0c0e97cd68e
Patch-mainline: v5.19-rc5
References: git-fixes
The brightness key-presses might also get reported by the ACPI video bus,
check for this and in this case don't report the presses to avoid reporting
2 presses for a single key-press.
Fixes: ed83c9171829 ("platform/x86: panasonic-laptop: Resolve hotkey double trigger bug")
Reported-and-tested-by: Stefan Seyfried <seife+kernel@b1-systems.com>
Reported-and-tested-by: Kenneth Chan <kenneth.t.chan@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220624112340.10130-6-hdegoede@redhat.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/panasonic-laptop.c | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index f08ad85683cb..b59063f83104 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -945,6 +945,7 @@ config PANASONIC_LAPTOP
tristate "Panasonic Laptop Extras"
depends on INPUT && ACPI
depends on BACKLIGHT_CLASS_DEVICE
+ depends on ACPI_VIDEO=n || ACPI_VIDEO
select INPUT_SPARSEKMAP
help
This driver adds support for access to backlight control and hotkeys
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index 2e6531dd15f9..d65e6c2372ca 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -132,6 +132,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <acpi/video.h>
MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
@@ -783,6 +784,13 @@ static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
key, 0x80, false);
}
+ /*
+ * Don't report brightness key-presses if they are also reported
+ * by the ACPI video bus.
+ */
+ if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses())
+ return;
+
if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
pr_err("Unknown hotkey event: 0x%04llx\n", result);
}
--
2.35.3