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drm/i915: move VBT based TV presence check to intel_bios.c

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Hide knowledge about VBT child devices in intel_bios.c.

v2: also move int_tv_support check to intel_bios.c (Sivakumar)

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125015-7931-1-git-send-email-jani.nikula@intel.com
This commit is contained in:
Jani Nikula
2016-03-16 12:43:29 +02:00
parent 6b93e9c89e
commit 3bdd14d542
3 changed files with 43 additions and 45 deletions
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41
drivers/gpu/drm/i915/intel_bios.c
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@@ -1431,3 +1431,44 @@ 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.int_tv_support)
return false;
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;
}