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drm: platform multi-device support

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Include the device id in the bus-id to give userspace a way to open
the correct "cardN" when there are multiple device instances.

Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Rob Clark 2011-07-14 03:12:43 +00:00 committed by Dave Airlie
parent d0254d56c7
commit 28a4a163b5
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/drm_platform.c
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@ -123,14 +123,15 @@ static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *mas
{
int len, ret;
master->unique_len = 10 + strlen(dev->platformdev->name);
master->unique_len = 13 + strlen(dev->platformdev->name);
master->unique_size = master->unique_len;
master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
if (master->unique == NULL)
return -ENOMEM;
len = snprintf(master->unique, master->unique_len,
"platform:%s", dev->platformdev->name);
"platform:%s:%02d", dev->platformdev->name, dev->platformdev->id);
if (len > master->unique_len) {
DRM_ERROR("Unique buffer overflowed\n");