linux-kernel - Re: [PATCH 1/4] drm/i915: add support for vga

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Message-ID: <20140107104324.GB8991@nuc-i3427.alporthouse.com>
Date:	Tue, 7 Jan 2014 10:43:24 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Ramkumar Ramachandra <artagnon@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andreas Heider <andreas@...tr.de>,
	Seth Forshee <seth.forshee@...onical.com>
Subject: Re: [PATCH 1/4] drm/i915: add support for vga_switcheroo reprobe

On Tue, Jan 07, 2014 at 03:28:40PM +0530, Ramkumar Ramachandra wrote:
> Cc: Andreas Heider <andreas@...tr.de>
> Cc: Seth Forshee <seth.forshee@...onical.com>
> Original-patch-by: Andreas Heider <andreas@...tr.de>
> Signed-off-by: Ramkumar Ramachandra <artagnon@...il.com>
> ---
>  drivers/gpu/drm/i915/i915_dma.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 5c64842..336a835b 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1265,6 +1265,12 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
>  	}
>  }
>  
> +static void i915_switcheroo_reprobe(struct pci_dev *pdev)
> +{
> +	struct drm_device *dev = pci_get_drvdata(pdev);
> +	intel_fbdev_output_poll_changed(dev);
> +}

switcheroo should be sending a hotplug notification, which should
trigger both this kernel listener and userspace.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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