linux-kernel - Re: [PATCH] Input: ALPS - Detect trackstick presence for v7 protocol

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Date:	Wed, 6 Jan 2016 09:12:30 +0100
From:	Hans de Goede <hdegoede@...hat.com>
To:	Pali Rohár <pali.rohar@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Santiago Gala <sgala@...che.org>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alex Hung <alex.hung@...onical.com>
Subject: Re: [PATCH] Input: ALPS - Detect trackstick presence for v7 protocol

Hi,

On 05-01-16 17:44, Pali Rohár wrote:
> On Sunday 22 March 2015 14:46:11 Pali Rohár wrote:
>> This patch adds detection of trackstick for v7 protocol devices. Code in this
>> patch is used in official Dell touchpad linux drivers for Dell models:
>> Dell Latitude E5250/5250, E5450/5450, E5550/5550
>>
>> Detection code and base reg for alps v3 rushmore and v7 devices is exacly same.
>>
>> Also user in bug https://bugzilla.kernel.org/show_bug.cgi?id=94801 reported
>> that Toshiba Sattellite Z30-A-1DG has only alps v7 touchpad device without
>> trackstick and kernel reports to userspace also redundant trackstick device.
>>
>> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
>> ---
>
> Hello!
>
> Alex now tested this patch on two Dell machines with ALPS: E5450 (with
> TrackStick) and E5250 (without TrackStick).
>
> With patch nothing was changed for E5450. And E5250 with patch does not
> show trackstick input device anymore.
>
> Tested-by: Alex Hung <alex.hung@...onical.com>

With that this patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Pali, it is probably a good idea to send Dmitry a v2 of these 2
patches rebased on top of the latest next and with Alex' Tested-By
and my Reviewed-by-s added.

Regards,

Hans


>
>>   drivers/input/mouse/alps.c |   12 ++++++++----
>>   1 file changed, 8 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
>> index 33198b9..c9cd27a 100644
>> --- a/drivers/input/mouse/alps.c
>> +++ b/drivers/input/mouse/alps.c
>> @@ -30,6 +30,7 @@
>>   #define ALPS_CMD_NIBBLE_10	0x01f2
>>
>>   #define ALPS_REG_BASE_RUSHMORE	0xc2c0
>> +#define ALPS_REG_BASE_V7	0xc2c0
>>   #define ALPS_REG_BASE_PINNACLE	0x0000
>>
>>   static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
>> @@ -1795,7 +1796,7 @@ static int alps_absolute_mode_v3(struct psmouse *psmouse)
>>   	return 0;
>>   }
>>
>> -static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
>> +static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
>>   {
>>   	int ret = -EIO, reg_val;
>>
>> @@ -1880,7 +1881,7 @@ static int alps_hw_init_v3(struct psmouse *psmouse)
>>   	int reg_val;
>>   	unsigned char param[4];
>>
>> -	reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
>> +	reg_val = alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_PINNACLE);
>>   	if (reg_val == -EIO)
>>   		goto error;
>>
>> @@ -2260,8 +2261,8 @@ static int alps_set_protocol(struct psmouse *psmouse,
>>   		priv->x_bits = 16;
>>   		priv->y_bits = 12;
>>
>> -		if (alps_probe_trackstick_v3(psmouse,
>> -					     ALPS_REG_BASE_RUSHMORE) < 0)
>> +		if (alps_probe_trackstick_v3_v7(psmouse,
>> +						ALPS_REG_BASE_RUSHMORE) < 0)
>>   			priv->flags &= ~ALPS_DUALPOINT;
>>
>>   		break;
>> @@ -2311,6 +2312,9 @@ static int alps_set_protocol(struct psmouse *psmouse,
>>   		if (priv->fw_ver[1] != 0xba)
>>   			priv->flags |= ALPS_BUTTONPAD;
>>
>> +		if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
>> +			priv->flags &= ~ALPS_DUALPOINT;
>> +
>>   		break;
>>   	}
>>
>
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