Hi, Sorry for later reply, I am not sure version 1 is ok or not, so, I think I should modify my patch and let ETP_SAMPLE_QUERY only work for version 2,3,4. And for your question, yes, I think you can use "etd->samples" at elantech_set_range for version 2, even though the definition of these three bytes maybe different between version 2 and 3. Thank you, Duson -----Original Message----- From: ulrik.debie-os@xxxxxxxxx [mailto:ulrik.debie-os@xxxxxxxxx] Sent: Wednesday, July 29, 2015 3:19 AM To: duson Cc: linux-input@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Dmitry Torokhov Subject: Re: [PATCH 2/2] Input - elantech: Add special check for fw_version 0x470f01 touchpad Hi Duson, Thanks for your update. Your latest patch has 2 trailing whitespaces problems as shown by checkpatch.pl. There was another comment you probably overlooked in my previous mail: > + if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, > + etd->samples)) { Is this wise to run on all elantech hardware ? No regression ? Currently it is called when hw_version = 2 and some other conditions in the function elantech_set_range. That could be a hint that the range hw_version 2->7 is probably ok, but what about hw_version 1 ? Is it normal that the semantics of ETP_SAMPLE_QUERY on hw_version 2 is totally different from the fw_version 0x470f01 ? Assuming there are no regressions introduced by ETP_SAMPLE_QUERY, I would change elantech_set_range to use the stored sample values instead of querying for it again. That probably can be put in a separate patch. Thanks, Kind Regards, Ulrik On Thu, Jul 23, 2015 at 08:54:32AM +0800, duson wrote: > > It is no need to check the packet[0] for sanity check when doing > elantech_packet_check_v4() function for fw_version = 0x470f01 touchpad. > > Signed-off by: Duson Lin <dusonlin@xxxxxxxxxx> > --- > drivers/input/mouse/elantech.c | 26 +++++++++++++++++++++++--- > drivers/input/mouse/elantech.h | 1 + > 2 files changed, 24 insertions(+), 3 deletions(-) > > diff --git a/drivers/input/mouse/elantech.c > b/drivers/input/mouse/elantech.c index ce3d400..6c6c2bb 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; > @@ -1117,6 +1127,7 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse, > * 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 (**) > + * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons > * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons > * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) > * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) > @@ -1648,6 +1659,15 @@ 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]); > + > 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; > > > > > > > -- > 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 -- 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
