This is a note to let you know that I've just added the patch titled
platform/x86: panasonic-laptop: de-obfuscate button codes
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-x86-panasonic-laptop-de-obfuscate-button-co.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1e80d547b535d76fc7b1ff2c1109485a58b6ac1a
Author: Stefan Seyfried <seife+kernel@xxxxxxxxxxxxxx>
Date: Fri Jun 24 13:23:35 2022 +0200
platform/x86: panasonic-laptop: de-obfuscate button codes
[ Upstream commit 65a3e6c8d3f7c346813a05f3d76fc46b640d76d6 ]
In the definition of panasonic_keymap[] the key codes are given in
decimal, later checks are done with hexadecimal values, which does
not help in understanding the code.
Additionally use two helper variables to shorten the code and make
the logic more obvious.
Fixes: ed83c9171829 ("platform/x86: panasonic-laptop: Resolve hotkey double trigger bug")
Signed-off-by: Stefan Seyfried <seife+kernel@xxxxxxxxxxxxxx>
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220624112340.10130-3-hdegoede@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index 37850d07987d..ca6137f4000f 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -762,6 +762,8 @@ static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
struct input_dev *hotk_input_dev = pcc->input_dev;
int rc;
unsigned long long result;
+ unsigned int key;
+ unsigned int updown;
rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
NULL, &result);
@@ -770,18 +772,22 @@ static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
return;
}
+ key = result & 0xf;
+ updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */
+
/* hack: some firmware sends no key down for sleep / hibernate */
- if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
- if (result & 0x80)
+ if (key == 7 || key == 10) {
+ if (updown)
sleep_keydown_seen = 1;
if (!sleep_keydown_seen)
sparse_keymap_report_event(hotk_input_dev,
- result & 0xf, 0x80, false);
+ key, 0x80, false);
}
- if ((result & 0xf) == 0x7 || (result & 0xf) == 0x9 || (result & 0xf) == 0xa) {
+ /* for the magic values, see panasonic_keymap[] above */
+ if (key == 7 || key == 9 || key == 10) {
if (!sparse_keymap_report_event(hotk_input_dev,
- result & 0xf, result & 0x80, false))
+ key, updown, false))
pr_err("Unknown hotkey event: 0x%04llx\n", result);
}
}
