linux-kernel - Re: [PATCH 2/2] acer-wmi: add Acer Aspire 5750G to video vendor list but keep acpi video driver

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Date:	Mon, 22 Apr 2013 21:04:13 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Chun-Yi Lee <joeyli.kernel@...il.com>
Cc:	mjg@...hat.com, rjw@...k.pl, platform-driver-x86@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Lee, Chun-Yi" <jlee@...e.com>,
	Carlos Corbacho <carlos@...angeworlds.co.uk>,
	Corentin Chary <corentincj@...aif.net>,
	Aaron Lu <aaron.lu@...el.com>, Thomas Renninger <trenn@...e.de>
Subject: Re: [PATCH 2/2] acer-wmi: add Acer Aspire 5750G to video vendor list
 but keep acpi video driver

On Mon, Apr 22, 2013 at 08:39:14PM +0800, Chun-Yi Lee wrote:
> From: Lee, Chun-Yi <jlee@...e.com>
> 
> After Andrzej's testing, we found the acpi backlight methods broken on Acer
> Aspire 5750G but the i915 backlight control works when we set to vendor mode.
> And, we still want to keep the acpi/video driver for transfer acpi event to key
> event but not unregister whole acpi/video driver.
> 
> This patch introduced a new capability flag is ACER_CAP_KEEP_VIDEO_KEY, it
> indicates the machine works fine with acpi/video driver for key event but want
> to unregister the backlight interface of acpi/video.
> 
> Reference: bko#35622
>         https://bugzilla.kernel.org/show_bug.cgi?id=35622
> 
> Tested-by: Andrzej Krentosz <endrjux@...il.com>
> Cc: Carlos Corbacho <carlos@...angeworlds.co.uk>
> Cc: Matthew Garrett <mjg@...hat.com>
> Cc: Dmitry Torokhov <dtor@...l.ru>
> Cc: Corentin Chary <corentincj@...aif.net>
> Cc: Rafael J. Wysocki <rjw@...k.pl>
> Cc: Aaron Lu <aaron.lu@...el.com>
> Cc: Thomas Renninger <trenn@...e.de>
> Signed-off-by: Lee, Chun-Yi <jlee@...e.com>
> ---
>  drivers/platform/x86/acer-wmi.c |   20 ++++++++++++++++++++
>  1 files changed, 20 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index c9076bd..2a02409 100644
> --- a/drivers/platform/x86/acer-wmi.c
> +++ b/drivers/platform/x86/acer-wmi.c
> @@ -207,6 +207,7 @@ struct hotkey_function_type_aa {
>  #define ACER_CAP_BRIGHTNESS		(1<<3)
>  #define ACER_CAP_THREEG			(1<<4)
>  #define ACER_CAP_ACCEL			(1<<5)
> +#define ACER_CAP_KEEP_VIDEO_KEY		(1<<6)
>  #define ACER_CAP_ANY			(0xFFFFFFFF)
>  
>  /*
> @@ -539,6 +540,15 @@ static int video_set_backlight_video_vendor(const struct dmi_system_id *d)
>  	return 0;
>  }
>  
> +static int video_set_backlight_video_vendor_keep_acpi_video(
> +		const struct dmi_system_id *d)
> +{
> +	video_set_backlight_video_vendor(d);
> +	interface->capability |= ACER_CAP_KEEP_VIDEO_KEY;
> +	pr_info("Keep acpi video driver for emit keycode against backlight change\n");

Huh?

"Keeping acpi video driver active to emit backlight brightness change
key events"?

Thanks.

-- 
Dmitry
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