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@xxxxxxxxx>
> ---
> 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
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