[RFC libdrm] Add NVIDIA Tegra support

[Thierry Reding]

On Wed, Dec 05, 2012 at 09:39:11AM +0200, Arto Merilainen wrote:
> On 12/04/2012 05:13 PM, Thierry Reding wrote:
> >+int drm_tegra_open(const char *path, struct drm_tegra **devicep)
> >+{
> >+       struct drm_tegra *device;
> >+       int err;
> >+
> >+       if (!path || !devicep)
> >+               return -EINVAL;
> >+
> >+       device = calloc(1, sizeof(*device));
> >+       if (!device)
> >+               return -ENOMEM;
> >+
> >+       DRMINITLISTHEAD(&device->bo_list);
> >+
> >+       device->fd = open(path, O_RDWR);
> >+       if (device->fd < 0) {
> >+               err = -errno;
> >+               free(device);
> >+               return err;
> >+       }
> >+
> >+       *devicep = device;
> >+
> >+       return 0;
> >+}
> 
> I think you shouldn't ask the path from the application (=DDX) here,
> but use drmOpen() that automatically finds the correct device for
> you.
> 
> I'd also prefer letting the application open and close the device
> and modify drm_tegra_open() to take the fd as a parameter. That way
> the DDX could easily access also all generic libdrm functions.

Good points, I'll take those into account.

Thanks,
Thierry
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