[Openchrome-devel] [Bug 94473] DRM / KMS bootup error on VX900 platform

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94473

--- Comment #22 from HuangRan <huangran at iscas.ac.cn> ---
With further kernel debugging, we found that in via_driver_load() function, it
has the code as below:
#if __OS_HAS_AGP
    if ((dev_priv->engine_type > VIA_ENG_H2) ||
        (dev->agp && drm_pci_device_is_agp(dev))) {
        ret = via_detect_agp(dev);
        if (!ret)
            via_agp_engine_init(dev_priv);
        else
            DRM_ERROR("Failed to allocate AGP\n");
    }
#endif

Actually dev->agp is NULL for VX900. But because dev_priv->engine_type value is
greater than VIA_ENG_H2, via_detect_agp() is called.
I am not sure what does engine_type mean? Can anybody give some comments? And
why is it related to AGP detect?

Thanks,
Frank

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