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Date: Mon, 3 Oct 2016 09:07:26 -0300
From: Marcos Paulo de Souza <marcos.souza.org@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/2] Avoid selftests on some Asus models
Hi Dmitry,
On Sun, Oct 02, 2016 at 10:16:31PM -0700, Dmitry Torokhov wrote:
> 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.
No problem.
>
> Does the version below still work for you?
Yes, still works for me.
Tested-by: Marcos Paulo de Souza <marcos.souza.org@...il.com>
>
> Thanks.
>
> --
> Dmitry
>
> Input: i8042 - skip selftest on ASUS laptops
>
> From: Marcos Paulo de Souza <marcos.souza.org@...il.com>
>
> 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@...il.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
> 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;
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