6.6-stable review patch. If anyone has any objections, please let me know.
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From: Werner Sembach wse@tuxedocomputers.com
commit 3d765ae2daccc570b3f4fbcb57eb321b12cdded2 upstream.
On s3 resume the i8042 driver tries to restore the controller to a known state by reinitializing things, however this can confuse the controller with different effects. Mostly occasionally unresponsive keyboards after resume.
These issues do not rise on s0ix resume as here the controller is assumed to preserved its state from before suspend.
This patch adds a quirk for devices where the reinitialization on s3 resume is not needed and might be harmful as described above. It does this by using the s0ix resume code path at selected locations.
This new quirk goes beyond what the preexisting reset=never quirk does, which only skips some reinitialization steps.
Signed-off-by: Werner Sembach wse@tuxedocomputers.com Cc: stable@vger.kernel.org Reviewed-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20240104183118.779778-2-wse@tuxedocomputers.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/input/serio/i8042-acpipnpio.h | 10 +++++++--- drivers/input/serio/i8042.c | 10 +++++++--- 2 files changed, 14 insertions(+), 6 deletions(-)
--- a/drivers/input/serio/i8042-acpipnpio.h +++ b/drivers/input/serio/i8042-acpipnpio.h @@ -83,6 +83,7 @@ static inline void i8042_write_command(i #define SERIO_QUIRK_KBDRESET BIT(12) #define SERIO_QUIRK_DRITEK BIT(13) #define SERIO_QUIRK_NOPNP BIT(14) +#define SERIO_QUIRK_FORCENORESTORE BIT(15)
/* Quirk table for different mainboards. Options similar or identical to i8042 * module parameters. @@ -1685,6 +1686,8 @@ static void __init i8042_check_quirks(vo if (quirks & SERIO_QUIRK_NOPNP) i8042_nopnp = true; #endif + if (quirks & SERIO_QUIRK_FORCENORESTORE) + i8042_forcenorestore = true; } #else static inline void i8042_check_quirks(void) {} @@ -1718,7 +1721,7 @@ static int __init i8042_platform_init(vo
i8042_check_quirks();
- pr_debug("Active quirks (empty means none):%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + pr_debug("Active quirks (empty means none):%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", i8042_nokbd ? " nokbd" : "", i8042_noaux ? " noaux" : "", i8042_nomux ? " nomux" : "", @@ -1738,10 +1741,11 @@ static int __init i8042_platform_init(vo "", #endif #ifdef CONFIG_PNP - i8042_nopnp ? " nopnp" : ""); + i8042_nopnp ? " nopnp" : "", #else - ""); + "", #endif + i8042_forcenorestore ? " forcenorestore" : "");
retval = i8042_pnp_init(); if (retval) --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -115,6 +115,10 @@ module_param_named(nopnp, i8042_nopnp, b MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings"); #endif
+static bool i8042_forcenorestore; +module_param_named(forcenorestore, i8042_forcenorestore, bool, 0); +MODULE_PARM_DESC(forcenorestore, "Force no restore on s3 resume, copying s2idle behaviour"); + #define DEBUG #ifdef DEBUG static bool i8042_debug; @@ -1232,7 +1236,7 @@ static int i8042_pm_suspend(struct devic { int i;
- if (pm_suspend_via_firmware()) + if (!i8042_forcenorestore && pm_suspend_via_firmware()) i8042_controller_reset(true);
/* Set up serio interrupts for system wakeup. */ @@ -1248,7 +1252,7 @@ static int i8042_pm_suspend(struct devic
static int i8042_pm_resume_noirq(struct device *dev) { - if (!pm_resume_via_firmware()) + if (i8042_forcenorestore || !pm_resume_via_firmware()) i8042_interrupt(0, NULL);
return 0; @@ -1271,7 +1275,7 @@ static int i8042_pm_resume(struct device * not restore the controller state to whatever it had been at boot * time, so we do not need to do anything. */ - if (!pm_suspend_via_firmware()) + if (i8042_forcenorestore || !pm_suspend_via_firmware()) return 0;
/*