[Intel-gfx] [PATCH 10/11] drm/i915/debugfs: add a separate debugfs file for VBT

[Chris Wilson]

On Mon, Dec 14, 2015 at 12:50:54PM +0200, Jani Nikula wrote:
> In the future the VBT might not be in mailbox #4 of the ACPI OpRegion,
> thus unavailable in i915_opregion, so add a separate file for the VBT.
> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c   | 22 ++++++++++++++++++++++
>  drivers/gpu/drm/i915/i915_drv.h       |  1 +
>  drivers/gpu/drm/i915/intel_opregion.c |  4 +++-
>  3 files changed, 26 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index a9e1f18c36d1..aef1393e707f 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -1857,6 +1857,27 @@ out:
>  	return 0;
>  }
>  
> +static int i915_vbt(struct seq_file *m, void *unused)
> +{
> +	struct drm_info_node *node = m->private;
> +	struct drm_device *dev = node->minor->dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct intel_opregion *opregion = &dev_priv->opregion;
> +	int ret;
> +
> +	ret = mutex_lock_interruptible(&dev->struct_mutex);

The contents of opregion->vbt are not serialised by struct_mutex, right?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre