[Intel-gfx] [PATCH v2 09/15] drm/i915: Ignore VBT int_crt_support on 830M

[Bob Paauwe]

On Fri, 6 Jun 2014 22:44:12 +0300
<ville.syrjala at linux.intel.com> wrote:

> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> My Fujitsu-Siemens Lifebook S6010 definitely has a VGA connector, but
> the VBT says different. Ignore the VBT for 830M since it seems such
> old machines would generally have a VGA connector.
> 
> This is a regression caused by:
>  commit 9c2a03c2a194c086949f25d332937ac8dc4d9f7e
>  Author: Jesse Barnes <jbarnes at virtuousgeek.org>
>  Date:   Fri Apr 4 16:12:07 2014 -0700
> 
>     drm/i915: use VBT to determine whether to enumerate the VGA port
> 
> While at it refactor the code a bit to be more pleasing to the eye.
> 
> v2: Move the check into intel_crt_init() (Daniel)
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_crt.c     | 22 ++++++++++++++++++++--
>  drivers/gpu/drm/i915/intel_display.c |  3 +--
>  2 files changed, 21 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
> index 5a045d3..5104e9f 100644
> --- a/drivers/gpu/drm/i915/intel_crt.c
> +++ b/drivers/gpu/drm/i915/intel_crt.c
> @@ -801,6 +801,25 @@ static const struct dmi_system_id intel_no_crt[] = {
>  	{ }
>  };
>  
> +static bool has_crt_support(struct drm_device *dev)
> +{
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +
> +	/* no hardware support whatsoever */
> +	if (IS_ULT(dev) || IS_CHERRYVIEW(dev))
> +		return false;
> +
> +	/* Skip machines without VGA that falsely report hotplug events */
> +	if (dmi_check_system(intel_no_crt))
> +		return false;
> +
> +	/* Fujitsu-Siemens Lifebook S6010 VBT lies */
> +	if (IS_I830(dev))
> +		return true;

My old D945GNT board with a 945G and really old BIOS also has a VBT
that lies about this.

> +
> +	return dev_priv->vbt.int_crt_support;
> +}
> +
>  void intel_crt_init(struct drm_device *dev)
>  {
>  	struct drm_connector *connector;
> @@ -808,8 +827,7 @@ void intel_crt_init(struct drm_device *dev)
>  	struct intel_connector *intel_connector;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  
> -	/* Skip machines without VGA that falsely report hotplug events */
> -	if (dmi_check_system(intel_no_crt))
> +	if (!has_crt_support(dev))
>  		return;
>  
>  	crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index b5cbb28..1060caa 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11376,8 +11376,7 @@ static void intel_setup_outputs(struct drm_device *dev)
>  
>  	intel_lvds_init(dev);
>  
> -	if (!IS_ULT(dev) && !IS_CHERRYVIEW(dev) && dev_priv->vbt.int_crt_support)
> -		intel_crt_init(dev);
> +	intel_crt_init(dev);
>  
>  	if (HAS_DDI(dev)) {
>  		int found;