diff options
Diffstat (limited to 'linux-core/mga_drv.c')
| -rw-r--r-- | linux-core/mga_drv.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/linux-core/mga_drv.c b/linux-core/mga_drv.c index bdb591ee..e0f1ab31 100644 --- a/linux-core/mga_drv.c +++ b/linux-core/mga_drv.c @@ -37,6 +37,7 @@ #include "drm_pciids.h" +static int mga_driver_device_is_agp(drm_device_t * dev); static int postinit(struct drm_device *dev, unsigned long flags) { dev->counters += 3; @@ -82,6 +83,7 @@ static struct drm_driver driver = { DRIVER_IRQ_VBL, .pretakedown = mga_driver_pretakedown, .dma_quiescent = mga_driver_dma_quiescent, + .device_is_agp = mga_driver_device_is_agp, .vblank_wait = mga_driver_vblank_wait, .irq_preinstall = mga_driver_irq_preinstall, .irq_postinstall = mga_driver_irq_postinstall, @@ -134,3 +136,44 @@ module_exit(mga_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL and additional rights"); + +/** + * Determine if the device really is AGP or not. + * + * In addition to the usual tests performed by \c drm_device_is_agp, this + * function detects PCI G450 cards that appear to the system exactly like + * AGP G450 cards. + * + * \param dev The device to be tested. + * + * \returns + * If the device is a PCI G450, zero is returned. Otherwise non-zero is + * returned. + */ +int mga_driver_device_is_agp(drm_device_t * dev) +{ + const struct pci_dev * const pdev = dev->pdev; + + + /* There are PCI versions of the G450. These cards have the + * same PCI ID as the AGP G450, but have an additional PCI-to-PCI + * bridge chip. We detect these cards, which are not currently + * supported by this driver, by looking at the device ID of the + * bus the "card" is on. If vendor is 0x3388 (Hint Corp) and the + * device is 0x0021 (HB6 Universal PCI-PCI bridge), we reject the + * device. + */ + + if ( (pdev->device == 0x0525) + && (pdev->bus->self->vendor == 0x3388) + && (pdev->bus->self->device == 0x0021) ) { +#if defined( __powerpc__ ) + DRM_ERROR("GXT135p is not yet supported\n"); +#else + DRM_ERROR("PCI G450 is not yet supported\n"); +#endif + return 0; + } + + return 1; +} |