linux-kernel - Re: [PATCH] Add model data for Dell Precision 3510 trackpad.

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Message-ID: <76481654aedb6b687b145441283f3268@riseup.net>
Date:   Sun, 19 Feb 2017 15:24:58 +0000
From:   John Preston <wcerfgba@...eup.net>
To:     Pali Rohár <pali.rohar@...il.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add model data for Dell Precision 3510 trackpad.

On 2017-02-19 13:35, Pali Rohár wrote:
> On Sunday 19 February 2017 13:16:34 John L. Preston wrote:
>> ---
>>  drivers/input/mouse/alps.c | 1 +
>>  1 file changed, 1 insertion(+)
>> 
>> diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
>> index 328edc8c8786..c0a4edefe54d 100644
>> --- a/drivers/input/mouse/alps.c
>> +++ b/drivers/input/mouse/alps.c
>> @@ -139,6 +139,7 @@ static const struct alps_model_info 
>> alps_model_data[] = {
>>  	{ { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
>>  		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },				/* 
>> Toshiba Tecra A11-11L */
>>  	{ { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
>> +	{ { 0x73, 0x03, 0x28 }, 0x13, { ALPS_PROTO_V8, 0x18, 0x18, 0 } 
>> },			/* Dell Precision 3510 */
>>  };
>> 
>>  static const struct alps_protocol_info alps_v3_protocol_data = {
> 
> Hi John! This is not a correct place do add new proto data. I already
> proposed reducing this table to just for PROTO_V2, but Dmitry was not
> happy about it.

Hi Pali. :)

> 
> Anyway, look at function alps_identify() where is detection for 
> ALPS_V8:
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/input/mouse/alps.c?h=v4.10-rc8#n2829
> 
> V8 is already detected when e7 is (0x73, 0x03, 0x28) and ec[1] is 0x01.
> What are your ec data? Probably ec[1] is not 0x01 as otherwise it 
> should
> be already detected.

I have just found that code and am confused because that is not the same 
code I have running on my system. My ec[1] is 0x01 so you are correct, 
it should already be detected and my patch is unnecessary. Sorry for the 
inconvenience.

> 
> Btw, from where you got your proto data in this patch?

I pulled it from dmesg:

[john@...te ~]$ dmesg|grep "Unknown ALPS touchpad"
[    3.071891] psmouse serio1: alps: Unknown ALPS touchpad: E7=73 03 28, 
EC=73 01 13