On Sat, Oct 01, 2016 at 07:56:37AM -0300, Marcos Paulo de Souza wrote: > ping? Sorry for the delay, I was trying to wrap my mind around the new always/never/sometimes logic. Does the version below still work for you? Thanks. -- Dmitry Input: i8042 - skip selftest on ASUS laptops From: Marcos Paulo de Souza <marcos.souza.org@xxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> --- Documentation/kernel-parameters.txt | 9 +++ drivers/input/serio/i8042-io.h | 2 - drivers/input/serio/i8042-ip22io.h | 2 - drivers/input/serio/i8042-ppcio.h | 2 - drivers/input/serio/i8042-sparcio.h | 2 - drivers/input/serio/i8042-unicore32io.h | 2 - drivers/input/serio/i8042-x86ia64io.h | 96 ++++++++++++++++++++++++++++++- drivers/input/serio/i8042.c | 55 ++++++++++++++---- 8 files changed, 150 insertions(+), 20 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a4f4d69..46726d4 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1457,7 +1457,14 @@ 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 diff --git a/drivers/input/serio/i8042-io.h b/drivers/input/serio/i8042-io.h index a5eed2a..34da81c 100644 --- a/drivers/input/serio/i8042-io.h +++ b/drivers/input/serio/i8042-io.h @@ -81,7 +81,7 @@ static inline int i8042_platform_init(void) return -EBUSY; #endif - i8042_reset = 1; + i8042_reset = I8042_RESET_ALWAYS; return 0; } diff --git a/drivers/input/serio/i8042-ip22io.h b/drivers/input/serio/i8042-ip22io.h index ee1ad27..08a1c10 100644 --- a/drivers/input/serio/i8042-ip22io.h +++ b/drivers/input/serio/i8042-ip22io.h @@ -61,7 +61,7 @@ static inline int i8042_platform_init(void) return -EBUSY; #endif - i8042_reset = 1; + i8042_reset = I8042_RESET_ALWAYS; return 0; } diff --git a/drivers/input/serio/i8042-ppcio.h b/drivers/input/serio/i8042-ppcio.h index f708c75..1aabea4 100644 --- a/drivers/input/serio/i8042-ppcio.h +++ b/drivers/input/serio/i8042-ppcio.h @@ -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; } diff --git a/drivers/input/serio/i8042-sparcio.h b/drivers/input/serio/i8042-sparcio.h index afcd1c1..6231d63 100644 --- a/drivers/input/serio/i8042-sparcio.h +++ b/drivers/input/serio/i8042-sparcio.h @@ -130,7 +130,7 @@ static int __init i8042_platform_init(void) } } - i8042_reset = 1; + i8042_reset = I8042_RESET_ALWAYS; return 0; } diff --git a/drivers/input/serio/i8042-unicore32io.h b/drivers/input/serio/i8042-unicore32io.h index 73f5cc1..4557475 100644 --- a/drivers/input/serio/i8042-unicore32io.h +++ b/drivers/input/serio/i8042-unicore32io.h @@ -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; } diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h index 60d74e1..07d547d 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -518,6 +518,90 @@ 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 */ @@ -1080,12 +1164,18 @@ 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; diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index 405252a..89abfdb 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -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) @@ -1482,7 +1515,7 @@ 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; -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
