[Intel-gfx] [PATCH 3/4] drm/i915: check the power domains in intel_lvds_get_hw_state()

[Damien Lespiau]

On Fri, Jul 04, 2014 at 01:38:35PM -0300, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> Just like we do for the other encoders. This should fix some WARNs
> when running pm_rpm on SNB.
> 
> Testcase: igt/pm_rpm
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80463
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>

-- 
Damien

> ---
>  drivers/gpu/drm/i915/intel_lvds.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
> index 4d29a83..8aa7973 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -71,8 +71,13 @@ static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
>  	struct drm_device *dev = encoder->base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
> +	enum intel_display_power_domain power_domain;
>  	u32 tmp;
>  
> +	power_domain = intel_display_port_power_domain(encoder);
> +	if (!intel_display_power_enabled(dev_priv, power_domain))
> +		return false;
> +
>  	tmp = I915_READ(lvds_encoder->reg);
>  
>  	if (!(tmp & LVDS_PORT_EN))
> -- 
> 2.0.0
> 
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