On 05/30/2012 02:32 PM, Laurent Pinchart wrote:
> [...]
> + for (i = 0; i < (format->yuv ? 2 : 1); ++i) {
> + obj = drm_gem_object_lookup(dev, file_priv,
> + mode_cmd->handles[i]);
> + if (obj == NULL) {
> + dev_dbg(dev->dev, "GEM object %u not found\n",
> + mode_cmd->handles[i]);
> + ret = -ENOENT;
> + goto error;
> + }
> + sfb->sobj[i] = to_shmob_gem_object(obj);
> + }
> +
I added multi-plane support the cma fb helper functions and it seems to
work. But all other DRM drivers seem to assume that multi-plane formats
still only have a single buffer, while yours seems to assume that there is a
plane for each buffer. The exception is the Exynos driver, but it added a
new set of formats which are identical to the other formats, but use one
buffer per plane.
So I'm not sure how to implement this correctly in a generic fashion.
- Lars
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