From 68a049a4168a82d2762c85bea22544b35549b6d4 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Sat, 8 Jan 2011 01:37:26 -0800 Subject: [PATCH] Input: i8042 - introduce 'notimeout' blacklist for Dell Vostro V13 commit f8313ef1f448006207f12c107123522c8bc00f15 upstream. i8042 controller present in Dell Vostro V13 errorneously signals spurious timeouts. Introduce i8042.notimeout parameter for ignoring i8042-signalled timeouts and apply this quirk automatically for Dell Vostro V13, based on DMI match. In addition to that, this machine also needs to be added to nomux blacklist. Signed-off-by: Jiri Kosina Signed-off-by: Dmitry Torokhov Cc: Tim Gardner Signed-off-by: Greg Kroah-Hartman --- Documentation/kernel-parameters.txt | 1 + drivers/input/serio/i8042-x86ia64io.h | 21 +++++++++++++++++++++ drivers/input/serio/i8042.c | 6 +++++- 3 files changed, 27 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 792be8687b52..2b2691509d08 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -811,6 +811,7 @@ and is between 256 and 4096 characters. It is defined in the file i8042.panicblink= [HW] Frequency with which keyboard LEDs should blink when kernel panics (default is 0.5 sec) + i8042.notimeout [HW] Ignore timeout condition signalled by conroller i8042.reset [HW] Reset the controller during init and cleanup i8042.unlock [HW] Unlock (ignore) the keylock diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h index 29e686388a2c..6afa77df4240 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -430,6 +430,13 @@ static struct dmi_system_id __initdata i8042_dmi_dritek_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4280"), }, }, + { + /* Dell Vostro V13 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V13"), + }, + }, { } }; @@ -655,6 +662,17 @@ static int __init i8042_platform_init(void) { int retval; +static const struct dmi_system_id __initconst i8042_dmi_notimeout_table[] = { + { + /* Dell Vostro V13 */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V13"), + }, + }, + { } +}; + /* * On ix86 platforms touching the i8042 data register region can do really * bad things. Because of this the region is always reserved on ix86 boxes. @@ -681,6 +699,9 @@ static int __init i8042_platform_init(void) if (dmi_check_system(i8042_dmi_nomux_table)) i8042_nomux = 1; + if (dmi_check_system(i8042_dmi_notimeout_table)) + i8042_notimeout = true; + if (dmi_check_system(i8042_dmi_dritek_table)) i8042_dritek = 1; #endif /* CONFIG_X86 */ diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index 170f71ee5772..008da66c553c 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -63,6 +63,10 @@ static unsigned int i8042_blink_frequency = 500; module_param_named(panicblink, i8042_blink_frequency, uint, 0600); MODULE_PARM_DESC(panicblink, "Frequency with which keyboard LEDs should blink when kernel panics"); +static unsigned int i8042_notimeout; +module_param_named(notimeout, i8042_notimeout, bool, 0); +MODULE_PARM_DESC(notimeout, "Ignore timeouts signalled by i8042"); + #ifdef CONFIG_X86 static unsigned int i8042_dritek; module_param_named(dritek, i8042_dritek, bool, 0); @@ -362,7 +366,7 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id) } else { dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) | - ((str & I8042_STR_TIMEOUT) ? SERIO_TIMEOUT : 0); + ((str & I8042_STR_TIMEOUT && !i8042_notimeout) ? SERIO_TIMEOUT : 0); port_no = (str & I8042_STR_AUXDATA) ? I8042_AUX_PORT_NO : I8042_KBD_PORT_NO; -- 2.39.5