Re: [PATCH v2 1/6] drm/i915: move VBT based TV presence check to intel_bios.c

[Mika Kahola <mika.kahola@intel.com>]

On Mon, 2016-01-11 at 21:54 +0200, Jani Nikula wrote:
> Hide knowledge about VBT child devices in intel_bios.c.
> 
Tested-by: Mika Kahola <mika.kahola@intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h   |  1 +
>  drivers/gpu/drm/i915/intel_bios.c | 38 ++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_tv.c   | 43 +--------------------------------------
>  3 files changed, 40 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 104bd1809936..3822c465d3dc 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3347,6 +3347,7 @@ extern void intel_i2c_reset(struct drm_device *dev);
>  /* intel_bios.c */
>  int intel_bios_init(struct drm_i915_private *dev_priv);
>  bool intel_bios_is_valid_vbt(const void *buf, size_t size);
> +bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv);
>  
>  /* intel_opregion.c */
>  #ifdef CONFIG_ACPI
> diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
> index 15ba52bd2538..bb9e8b086b63 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -1415,3 +1415,41 @@ intel_bios_init(struct drm_i915_private *dev_priv)
>  
>  	return 0;
>  }
> +
> +/**
> + * intel_bios_is_tv_present - is integrated TV present in VBT
> + * @dev_priv:	i915 device instance
> + *
> + * Return true if TV is present. If no child devices were parsed from VBT,
> + * assume TV is present.
> + */
> +bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
> +{
> +	union child_device_config *p_child;
> +	int i;
> +
> +	if (!dev_priv->vbt.child_dev_num)
> +		return true;
> +
> +	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
> +		p_child = dev_priv->vbt.child_dev + i;
> +		/*
> +		 * If the device type is not TV, continue.
> +		 */
> +		switch (p_child->old.device_type) {
> +		case DEVICE_TYPE_INT_TV:
> +		case DEVICE_TYPE_TV:
> +		case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
> +			break;
> +		default:
> +			continue;
> +		}
> +		/* Only when the addin_offset is non-zero, it is regarded
> +		 * as present.
> +		 */
> +		if (p_child->old.addin_offset)
> +			return true;
> +	}
> +
> +	return false;
> +}
> diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
> index 948cbff6c62e..29e68859b9b7 100644
> --- a/drivers/gpu/drm/i915/intel_tv.c
> +++ b/drivers/gpu/drm/i915/intel_tv.c
> @@ -1529,47 +1529,6 @@ static const struct drm_encoder_funcs intel_tv_enc_funcs = {
>  	.destroy = intel_encoder_destroy,
>  };
>  
> -/*
> - * Enumerate the child dev array parsed from VBT to check whether
> - * the integrated TV is present.
> - * If it is present, return 1.
> - * If it is not present, return false.
> - * If no child dev is parsed from VBT, it assumes that the TV is present.
> - */
> -static int tv_is_present_in_vbt(struct drm_device *dev)
> -{
> -	struct drm_i915_private *dev_priv = dev->dev_private;
> -	union child_device_config *p_child;
> -	int i, ret;
> -
> -	if (!dev_priv->vbt.child_dev_num)
> -		return 1;
> -
> -	ret = 0;
> -	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
> -		p_child = dev_priv->vbt.child_dev + i;
> -		/*
> -		 * If the device type is not TV, continue.
> -		 */
> -		switch (p_child->old.device_type) {
> -		case DEVICE_TYPE_INT_TV:
> -		case DEVICE_TYPE_TV:
> -		case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
> -			break;
> -		default:
> -			continue;
> -		}
> -		/* Only when the addin_offset is non-zero, it is regarded
> -		 * as present.
> -		 */
> -		if (p_child->old.addin_offset) {
> -			ret = 1;
> -			break;
> -		}
> -	}
> -	return ret;
> -}
> -
>  void
>  intel_tv_init(struct drm_device *dev)
>  {
> @@ -1585,7 +1544,7 @@ intel_tv_init(struct drm_device *dev)
>  	if ((I915_READ(TV_CTL) & TV_FUSE_STATE_MASK) == TV_FUSE_STATE_DISABLED)
>  		return;
>  
> -	if (!tv_is_present_in_vbt(dev)) {
> +	if (!intel_bios_is_tv_present(dev_priv)) {
>  		DRM_DEBUG_KMS("Integrated TV is not present.\n");
>  		return;
>  	}


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