From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jani Nikula <jani.nikula@intel.com>
Subject: Re: [PATCH] drm/i915: Ignore VBT backlight presence
	check on Acer C720 (4005U)
Date: Tue, 26 Aug 2014 15:21:11 +0300
Message-ID: <87bnr7l9vs.fsf@intel.com>
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To: Scot Doyle <lkml14@scotdoyle.com>, intel-gfx@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, Tyler Cleveland <siralucardt@openmailbox.org>
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On Thu, 21 Aug 2014, Scot Doyle <lkml14@scotdoyle.com> wrote:
> commit c675949ec58ca50d5a3ae3c757892f1560f6e896
>     drm/i915: do not setup backlight if not available according to VBT
>
> prevents backlight setup on the Acer C720 (Core i3 4005U CPU), which has a
> misconfigured VBT. Apply quirk to ignore the VBT backlight presence check
> during backlight setup.
>
> Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
> Tested-by: Tyler Cleveland <siralucardt@openmailbox.org>
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

Pushed to drm-intel-fixes, thanks for the patch.

BR,
Jani.

> ---
>  drivers/gpu/drm/i915/intel_display.c |    3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 0b327eb..3d4a4eb 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12553,6 +12553,9 @@ static struct intel_quirk intel_quirks[] = {
>  	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
>  	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
>
> +	/* Acer C720 Chromebook (Core i3 4005U) */
> +	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
> +
>  	/* Toshiba CB35 Chromebook (Celeron 2955U) */
>  	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
>
> -- 
> 1.7.10.4

-- 
Jani Nikula, Intel Open Source Technology Center