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bochs: ignore device if there isn't enougth memory

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The qemu stdvga can be configured with a wide range of video memory,
from 1 MB to 256 MB (default is 16 MB).  In case it is configured
with only 1 or 2 MB it isn't really usable with bochsdrm, due to
depths other than 32bpp not being supported so that isn't enough
memory for a reasonable sized framebuffer.  So skip the device
and let vgacon or vesafb+fbcon handle the it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-12-16 12:29:59 +01:00
parent 3be7988674
commit de59576293
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/bochs/bochs_drv.c
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@ -162,8 +162,15 @@ static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
static int bochs_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
unsigned long fbsize;
int ret;
fbsize = pci_resource_len(pdev, 0);
if (fbsize < 4 * 1024 * 1024) {
DRM_ERROR("less than 4 MB video memory, ignoring device\n");
return -ENOMEM;
}
ret = bochs_kick_out_firmware_fb(pdev);
if (ret)
return ret;