linux-kernel - Re: [PATCH] Sony laptop: Some Sony Vaia laptops do not enable wwan power by default.

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Message-ID: <49F09A35.6070304@tpi.com>
Date:	Thu, 23 Apr 2009 10:41:25 -0600
From:	Tim Gardner <timg@....com>
To:	Mattia Dongili <malattia@...ux.it>
CC:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Sony laptop: Some Sony Vaia laptops do not enable wwan
 power by default.

Mattia Dongili wrote:
> On Wed, Apr 22, 2009 at 12:53:51PM -0600, Tim Gardner wrote:
>> Mattia,
>>
>> Does this patch makes sense for just the Vaio? I've had positive feedback from
>> the tester in the bug report.
>>
>> rtg
>> -----------------
>> From 083972abb1d5e84845927b3925f077953c207b82 Mon Sep 17 00:00:00 2001
>> From: Tim Gardner <tim.gardner@...onical.com>
>> Date: Tue, 21 Apr 2009 11:09:10 -0600
>> Subject: [PATCH] Sony laptop: Some Sony Vaio laptops do not enable wwan power by default.
>>
>> Bug: https://bugs.launchpad.net/bugs/364678
>>
>> Added quirk to enable wwan power based on DMI information already present in the module.
>> It appears that wwan is not powered up from a cold boot.
> 
> The bug reporter says that this happens when booting from windows to
> linux, is it still true when manually enabling the device in linux and
> then rebooting (into linux again)?
> 

I can probably find out, though I'm not sure what impact it would have
on the driver. Does this laptop have a physical rfkill slider switch
from which you can somehow query initial state via ACPI or GPIO? If not,
then I assume the desired behavior is to just enable wwan and bluetooth
upon every boot ?

>> Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
>> ---
>>  drivers/misc/sony-laptop.c |   24 +++++++++++++++++++++++-
>>  1 files changed, 23 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
>> index 7e73acc..eab7011 100644
>> --- a/drivers/misc/sony-laptop.c
>> +++ b/drivers/misc/sony-laptop.c
>> @@ -1248,10 +1248,13 @@ struct device_ctrl {
>>  	u16				evport_offset;
>>  	u8				has_camera;
>>  	u8				has_bluetooth;
>> -	u8				has_wwan;
>>  	struct sonypi_eventtypes	*event_types;
>>  };
>>  
>> +struct sony_pic_quirk_entry {
>> +	u8				set_wwan_power;
>> +};
>> +
>>  struct sony_pic_dev {
>>  	struct device_ctrl	*control;
>>  	struct acpi_device	*acpi_dev;
>> @@ -1260,6 +1263,7 @@ struct sony_pic_dev {
>>  	struct list_head	interrupts;
>>  	struct list_head	ioports;
>>  	struct mutex		lock;
>> +	struct sony_pic_quirk_entry *quirks;
>>  	u8			camera_power;
>>  	u8			bluetooth_power;
>>  	u8			wwan_power;
>> @@ -2685,6 +2689,12 @@ static int sony_pic_add(struct acpi_device *device)
>>  	if (result)
>>  		goto err_remove_pf;
>>  
>> +	if (spic_dev.quirks && spic_dev.quirks->set_wwan_power) {
>> +		/*
>> +		 * Power isn't enabled by default.
>> +		 */
>> +		sony_pic_set_wwanpower(1);
>> +	}
>>  	return 0;
>>  
>>  err_remove_pf:
>> @@ -2755,6 +2765,16 @@ static struct acpi_driver sony_pic_driver = {
>>  		},
>>  };
>>  
>> +static struct sony_pic_quirk_entry sony_pic_vaio_vgn = {
>> +	.set_wwan_power = 1,
>> +};
>> +
>> +static int dmi_matched(const struct dmi_system_id *dmi)
>> +{
>> +	spic_dev.quirks = dmi->driver_data;
>> +	return 0;
>> +}
>> +
>>  static struct dmi_system_id __initdata sonypi_dmi_table[] = {
>>  	{
>>  		.ident = "Sony Vaio",
>> @@ -2769,6 +2789,8 @@ static struct dmi_system_id __initdata sonypi_dmi_table[] = {
>>  			DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
>>  			DMI_MATCH(DMI_PRODUCT_NAME, "VGN-"),
>>  		},
>> +		.callback = dmi_matched,
>> +		.driver_data = &sony_pic_vaio_vgn,
> 
> This is like just enabling it on all type3 (and some type2) vaios.
> Might as well call your quirk unconditionally for all models.
> 
> Honestly I'd rather work towards the rfkill implementation as Matthew
> suggests.

Agreed.

rtg
-- 
Tim Gardner timg@....com www.tpi.com
OR 503-601-0234 x102 MT 406-443-5357
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