This is a note to let you know that I've just added the patch titled Input: elan_i2c - properly wake up touchpad on ASUS laptops to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: input-elan_i2c-properly-wake-up-touchpad-on-asus-laptops.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2de4fcc64685def3e586856a2dc636df44532395 Mon Sep 17 00:00:00 2001 From: KT Liao <kt.liao@xxxxxxxxxx> Date: Wed, 13 Jul 2016 11:12:12 -0700 Subject: Input: elan_i2c - properly wake up touchpad on ASUS laptops From: KT Liao <kt.liao@xxxxxxxxxx> commit 2de4fcc64685def3e586856a2dc636df44532395 upstream. Some ASUS laptops were shipped with touchpads that require to be woken up first, before trying to switch them into absolute reporting mode, otherwise touchpad would fail to work while flooding the logs with: elan_i2c i2c-ELAN1000:00: invalid report id data (1) Among affected devices are Asus E202SA, N552VW, X456UF, UX305CA, and others. We detect such devices by checking the IC type and product ID numbers and adjusting order of operations accordingly. Signed-off-by: KT Liao <kt.liao@xxxxxxxxxx> Reported-by: Chris Chiu <chiu@xxxxxxxxxxxx> Reported-by: Vlad Glagolev <stealth@xxxxxxxxx> Tested-by: Vlad Glagolev <stealth@xxxxxxxxx> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/input/mouse/elan_i2c_core.c | 79 ++++++++++++++++++++++++++++-------- 1 file changed, 63 insertions(+), 16 deletions(-) --- a/drivers/input/mouse/elan_i2c_core.c +++ b/drivers/input/mouse/elan_i2c_core.c @@ -4,7 +4,8 @@ * Copyright (c) 2013 ELAN Microelectronics Corp. * * Author: 林政維 (Duson Lin) <dusonlin@xxxxxxxxxx> - * Version: 1.6.0 + * Author: KT Liao <kt.liao@xxxxxxxxxx> + * Version: 1.6.2 * * Based on cyapa driver: * copyright (c) 2011-2012 Cypress Semiconductor, Inc. @@ -40,7 +41,7 @@ #include "elan_i2c.h" #define DRIVER_NAME "elan_i2c" -#define ELAN_DRIVER_VERSION "1.6.1" +#define ELAN_DRIVER_VERSION "1.6.2" #define ELAN_VENDOR_ID 0x04f3 #define ETP_MAX_PRESSURE 255 #define ETP_FWIDTH_REDUCE 90 @@ -199,9 +200,41 @@ static int elan_sleep(struct elan_tp_dat return error; } +static int elan_query_product(struct elan_tp_data *data) +{ + int error; + + error = data->ops->get_product_id(data->client, &data->product_id); + if (error) + return error; + + error = data->ops->get_sm_version(data->client, &data->ic_type, + &data->sm_version); + if (error) + return error; + + return 0; +} + +static int elan_check_ASUS_special_fw(struct elan_tp_data *data) +{ + if (data->ic_type != 0x0E) + return false; + + switch (data->product_id) { + case 0x05 ... 0x07: + case 0x09: + case 0x13: + return true; + default: + return false; + } +} + static int __elan_initialize(struct elan_tp_data *data) { struct i2c_client *client = data->client; + bool woken_up = false; int error; error = data->ops->initialize(client); @@ -210,6 +243,27 @@ static int __elan_initialize(struct elan return error; } + error = elan_query_product(data); + if (error) + return error; + + /* + * Some ASUS devices were shipped with firmware that requires + * touchpads to be woken up first, before attempting to switch + * them into absolute reporting mode. + */ + if (elan_check_ASUS_special_fw(data)) { + error = data->ops->sleep_control(client, false); + if (error) { + dev_err(&client->dev, + "failed to wake device up: %d\n", error); + return error; + } + + msleep(200); + woken_up = true; + } + data->mode |= ETP_ENABLE_ABS; error = data->ops->set_mode(client, data->mode); if (error) { @@ -218,11 +272,13 @@ static int __elan_initialize(struct elan return error; } - error = data->ops->sleep_control(client, false); - if (error) { - dev_err(&client->dev, - "failed to wake device up: %d\n", error); - return error; + if (!woken_up) { + error = data->ops->sleep_control(client, false); + if (error) { + dev_err(&client->dev, + "failed to wake device up: %d\n", error); + return error; + } } return 0; @@ -248,10 +304,6 @@ static int elan_query_device_info(struct { int error; - error = data->ops->get_product_id(data->client, &data->product_id); - if (error) - return error; - error = data->ops->get_version(data->client, false, &data->fw_version); if (error) return error; @@ -261,11 +313,6 @@ static int elan_query_device_info(struct if (error) return error; - error = data->ops->get_sm_version(data->client, &data->ic_type, - &data->sm_version); - if (error) - return error; - error = data->ops->get_version(data->client, true, &data->iap_version); if (error) return error; Patches currently in stable-queue which might be from kt.liao@xxxxxxxxxx are queue-4.4/input-elan_i2c-properly-wake-up-touchpad-on-asus-laptops.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html