Re: [PATCH] Input - elantech: Add special check for fw_version 0x470f01 touchpad

ulrik.debie-os
2015-07-22T20:14:07Z

On Wed, Jul 22, 2015 at 09:55:51PM +0800, duson wrote:
>
> t is no need to check the packet[0] for sanity check when doing
> elantech_packet_check_v4() function for fw_version = 0x470f01 touchpad.
>
Hi Duson,

The laptops below also had issues with crc_enabled and they were solved by
the elantech_dmi_force_crc_enabled table. (0dc1587905a50f8f61bbc29e850aa592821e4bea)

* Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons
* Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons
* Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**)

Does the 0x470f01 laptop maybe have exactly the same issue ? In that case,
would it not be better if we could harmonize the solution ?
Do you also have the laptop name, firmware version and button configuration
available for 0x470f01 and are you in a position to share that information ?
> Signed-off by: Duson Lin <dusonlin@emc.com.tw>
> ---
> drivers/input/mouse/elantech.c | 25 ++++++++++++++++++++++---
> drivers/input/mouse/elantech.h | 1 +
> 2 files changed, 23 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
> index ce3d400..d969153 100644
> --- a/drivers/input/mouse/elantech.c
> +++ b/drivers/input/mouse/elantech.c
> @@ -784,6 +784,8 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
> unsigned char *packet = psmouse->packet;
> unsigned char packet_type = packet[3] & 0x03;
> bool sanity_check;
> + /* This represents the version of IC body. */
> + int ver = (etd->fw_version & 0x0f0000) >> 16;
>
> if (etd->tp_dev && (packet[3] & 0x0f) == 0x06)
> return PACKET_TRACKPOINT;
> @@ -796,9 +798,17 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
> */
> if (etd->crc_enabled)
> sanity_check = ((packet[3] & 0x08) == 0x00);
> - else
> - sanity_check = ((packet[0] & 0x0c) == 0x04 &&
> - (packet[3] & 0x1c) == 0x10);
> + else {
> + /*
> + * The sanity check only need to check packet[3]
> + * when IC_body = 7 and PID = 0x2A
> + */
> + if (ver == 7 && etd->samples[1] == 0x2A)
> + sanity_check = ((packet[3] & 0x1c) == 0x10);
> + else
> + sanity_check = ((packet[0] & 0x0c) == 0x04 &&
> + (packet[3] & 0x1c) == 0x10);
> + }
>
> if (!sanity_check)
> return PACKET_UNKNOWN;
> @@ -1648,6 +1658,15 @@ int elantech_init(struct psmouse *psmouse)
> etd->capabilities[0], etd->capabilities[1],
> etd->capabilities[2]);
>
> + if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY,
> + etd->samples)) {
> + psmouse_err(psmouse, "failed to query sample data.\n");
> + goto init_fail;
> + }
> + psmouse_info(psmouse,
> + "Elan sample query result 0x%02x, 0x%02x, 0x%02x.\n",
> + etd->samples[0], etd->samples[1], etd->samples[2]);
> +

Is this wise to run on all elantech hardware ?

> if (elantech_set_absolute_mode(psmouse)) {
> psmouse_err(psmouse,
> "failed to put touchpad into absolute mode.\n");
> diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
> index f965d15..e1cbf40 100644
> --- a/drivers/input/mouse/elantech.h
> +++ b/drivers/input/mouse/elantech.h
> @@ -129,6 +129,7 @@ struct elantech_data {
> unsigned char reg_26;
> unsigned char debug;
> unsigned char capabilities[3];
> + unsigned char samples[3];
> bool paritycheck;
> bool jumpy_cursor;
> bool reports_pressure;
>
>
>
>
>
>
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Kind regards,
Ulrik