From b619348d9d698b688088868ff125ee3937b0a3c6 Mon Sep 17 00:00:00 2001 From: Stefan Seyfried Date: Fri, 24 Jun 2022 13:23:35 +0200 Subject: [PATCH] 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 Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20220624112340.10130-3-hdegoede@redhat.com Signed-off-by: Sasha Levin --- drivers/platform/x86/panasonic-laptop.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index d4f444401496..84c16d9d9f8e 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); } }