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Input: i8042 - skip selftest on ASUS laptops

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On suspend/resume cycle, selftest is executed to reset i8042 controller.
But when this is done in Asus devices, subsequent calls to detect/init
functions to elantech driver fails. Skipping selftest fixes this problem.

An easier step to reproduce this problem is adding i8042.reset=1 as a
kernel parameter. On Asus laptops, it'll make the system to start with the
touchpad already stuck, since psmouse_probe forcibly calls the selftest
function.

This patch was inspired by John Hiesey's change[1], but, since this problem
affects a lot of models of Asus, let's avoid running selftests on them.

All models affected by this problem:
A455LD
K401LB
K501LB
K501LX
R409L
V502LX
X302LA
X450LCP
X450LD
X455LAB
X455LDB
X455LF
Z450LA

[1]: https://marc.info/?l=linux-input&m=144312209020616&w=2

Fixes: "ETPS/2 Elantech Touchpad dies after resume from suspend"
(https://bugzilla.kernel.org/show_bug.cgi?id=107971)

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Marcos Paulo de Souza 2016-10-01 12:07:35 -07:00 committed by Dmitry Torokhov
parent 4e1bff07d7
commit 930e19248e
8 changed files with 150 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Documentation/kernel-parameters.txt
View File

@ -1409,7 +1409,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
controllers
i8042.notimeout [HW] Ignore timeout condition signalled by controller
i8042.reset [HW] Reset the controller during init and cleanup
i8042.reset [HW] Reset the controller during init, cleanup and
suspend-to-ram transitions, only during s2r
transitions, or never reset
Format: { 1 | Y | y | 0 | N | n }
1, Y, y: always reset controller
0, N, n: don't ever reset controller
Default: only on s2r transitions on x86; most other
architectures force reset to be always executed
i8042.unlock [HW] Unlock (ignore) the keylock
i8042.kbdreset [HW] Reset device connected to KBD port

2
drivers/input/serio/i8042-io.h
View File

@ -81,7 +81,7 @@ static inline int i8042_platform_init(void)
return -EBUSY;
#endif
i8042_reset = 1;
i8042_reset = I8042_RESET_ALWAYS;
return 0;
}

2
drivers/input/serio/i8042-ip22io.h
View File

@ -61,7 +61,7 @@ static inline int i8042_platform_init(void)
return -EBUSY;
#endif
i8042_reset = 1;
i8042_reset = I8042_RESET_ALWAYS;
return 0;
}

2
drivers/input/serio/i8042-ppcio.h
View File

@ -44,7 +44,7 @@ static inline void i8042_write_command(int val)
static inline int i8042_platform_init(void)
{
i8042_reset = 1;
i8042_reset = I8042_RESET_ALWAYS;
return 0;
}

2
drivers/input/serio/i8042-sparcio.h
View File

@ -130,7 +130,7 @@ static int __init i8042_platform_init(void)
}
}
i8042_reset = 1;
i8042_reset = I8042_RESET_ALWAYS;
return 0;
}

2
drivers/input/serio/i8042-unicore32io.h
View File

@ -61,7 +61,7 @@ static inline int i8042_platform_init(void)
if (!request_mem_region(I8042_REGION_START, I8042_REGION_SIZE, "i8042"))
return -EBUSY;
i8042_reset = 1;
i8042_reset = I8042_RESET_ALWAYS;
return 0;
}

96
drivers/input/serio/i8042-x86ia64io.h
View File

@ -510,6 +510,90 @@ static const struct dmi_system_id __initconst i8042_dmi_nomux_table[] = {
{ }
};
/*
* On some Asus laptops, just running self tests cause problems.
*/
static const struct dmi_system_id i8042_dmi_noselftest_table[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "A455LD"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "K401LB"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "K501LB"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "K501LX"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "R409L"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "V502LX"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X302LA"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X450LCP"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X450LD"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X455LAB"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X455LDB"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "X455LF"),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "Z450LA"),
},
},
{ }
};
static const struct dmi_system_id __initconst i8042_dmi_reset_table[] = {
{
/* MSI Wind U-100 */
@ -1072,12 +1156,18 @@ static int __init i8042_platform_init(void)
return retval;
#if defined(__ia64__)
i8042_reset = true;
i8042_reset = I8042_RESET_ALWAYS;
#endif
#ifdef CONFIG_X86
if (dmi_check_system(i8042_dmi_reset_table))
i8042_reset = true;
/* Honor module parameter when value is not default */
if (i8042_reset == I8042_RESET_DEFAULT) {
if (dmi_check_system(i8042_dmi_reset_table))
i8042_reset = I8042_RESET_ALWAYS;
if (dmi_check_system(i8042_dmi_noselftest_table))
i8042_reset = I8042_RESET_NEVER;
}
if (dmi_check_system(i8042_dmi_noloop_table))
i8042_noloop = true;

55
drivers/input/serio/i8042.c
View File

@ -48,9 +48,39 @@ static bool i8042_unlock;
module_param_named(unlock, i8042_unlock, bool, 0);
MODULE_PARM_DESC(unlock, "Ignore keyboard lock.");
static bool i8042_reset;
module_param_named(reset, i8042_reset, bool, 0);
MODULE_PARM_DESC(reset, "Reset controller during init and cleanup.");
enum i8042_controller_reset_mode {
I8042_RESET_NEVER,
I8042_RESET_ALWAYS,
I8042_RESET_ON_S2RAM,
#define I8042_RESET_DEFAULT I8042_RESET_ON_S2RAM
};
static enum i8042_controller_reset_mode i8042_reset = I8042_RESET_DEFAULT;
static int i8042_set_reset(const char *val, const struct kernel_param *kp)
{
enum i8042_controller_reset_mode *arg = kp->arg;
int error;
bool reset;
if (val) {
error = kstrtobool(val, &reset);
if (error)
return error;
} else {
reset = true;
}
*arg = reset ? I8042_RESET_ALWAYS : I8042_RESET_NEVER;
return 0;
}
static const struct kernel_param_ops param_ops_reset_param = {
.flags = KERNEL_PARAM_OPS_FL_NOARG,
.set = i8042_set_reset,
};
#define param_check_reset_param(name, p) \
__param_check(name, p, enum i8042_controller_reset_mode)
module_param_named(reset, i8042_reset, reset_param, 0);
MODULE_PARM_DESC(reset, "Reset controller on resume, cleanup or both");
static bool i8042_direct;
module_param_named(direct, i8042_direct, bool, 0);
@ -1019,7 +1049,7 @@ static int i8042_controller_init(void)
* Reset the controller and reset CRT to the original value set by BIOS.
*/
static void i8042_controller_reset(bool force_reset)
static void i8042_controller_reset(bool s2r_wants_reset)
{
i8042_flush();
@ -1044,8 +1074,10 @@ static void i8042_controller_reset(bool force_reset)
* Reset the controller if requested.
*/
if (i8042_reset || force_reset)
if (i8042_reset == I8042_RESET_ALWAYS ||
(i8042_reset == I8042_RESET_ON_S2RAM && s2r_wants_reset)) {
i8042_controller_selftest();
}
/*
* Restore the original control register setting.
@ -1110,7 +1142,7 @@ static void i8042_dritek_enable(void)
* before suspending.
*/
static int i8042_controller_resume(bool force_reset)
static int i8042_controller_resume(bool s2r_wants_reset)
{
int error;
@ -1118,7 +1150,8 @@ static int i8042_controller_resume(bool force_reset)
if (error)
return error;
if (i8042_reset || force_reset) {
if (i8042_reset == I8042_RESET_ALWAYS ||
(i8042_reset == I8042_RESET_ON_S2RAM && s2r_wants_reset)) {
error = i8042_controller_selftest();
if (error)
return error;
@ -1195,7 +1228,7 @@ static int i8042_pm_resume_noirq(struct device *dev)
static int i8042_pm_resume(struct device *dev)
{
bool force_reset;
bool want_reset;
int i;
for (i = 0; i < I8042_NUM_PORTS; i++) {
@ -1218,9 +1251,9 @@ static int i8042_pm_resume(struct device *dev)
* off control to the platform firmware, otherwise we can simply restore
* the mode.
*/
force_reset = pm_resume_via_firmware();
want_reset = pm_resume_via_firmware();
return i8042_controller_resume(force_reset);
return i8042_controller_resume(want_reset);
}
static int i8042_pm_thaw(struct device *dev)
@ -1481,7 +1514,7 @@ static int __init i8042_probe(struct platform_device *dev)
i8042_platform_device = dev;
if (i8042_reset) {
if (i8042_reset == I8042_RESET_ALWAYS) {
error = i8042_controller_selftest();
if (error)
return error;