[Acked/cmt] [SRU][Trusty/Utopic] UBUNTU: SAUCE: Add use_native_backlight quirk for HP ProBook 6570b

[Andy Whitcroft]

On Fri, Dec 12, 2014 at 11:24:07AM +0800, AceLan Kao wrote:
> BugLink: http://bugs.launchpad.net/bugs/1359010
> 
> SRU Justification:
> 
> Impact: The ACPI video backlight interface is broken under WIN8 OSI,
> have to switch to use native backlight interface.
> 
> Fix: Add this machine into quirk to force it use native backlight interface
> 
> Testcase: Tested on HP ProBook 6570b laptop
> 
> The quirk mechanism has been remove since v3.18-rc1
>    e4d38b5 ACPI / video: Remove video_set_use_native_backlight quirk
> After this commit which is in 3.17-rc4, it will use native backlight as default
>    25294e9 ACPI / video: Fix use_native_backlight selection logic
> So, we can't upstream this patch, and we also need it in vivid.

Vivid will be v3.18+ very soon, and from what I can see it will have no
need of this quirk, as the default is now on.

> Signed-off-by: AceLan Kao <acelan.kao at canonical.com>
> ---
>  drivers/acpi/video.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
> index e858463..db1dccd 100644
> --- a/drivers/acpi/video.c
> +++ b/drivers/acpi/video.c
> @@ -604,6 +604,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
>  		DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 8780w"),
>  		},
>  	},
> +	{
> +	.callback = video_set_use_native_backlight,
> +	.ident = "HP ProBook 6570b",
> +	.matches = {
> +		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "HP ProBook 6570b"),
> +		},
> +	},
>  	{}
>  };
>  

Acked-by: Andy Whitcroft <apw at canonical.com>

-apw