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drm/vc4: Add support for rendering with ETC1 textures.

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The validation for it ends up being quite simple, but I hadn't got
around to it before merging the driver.  For backwards compatibility,
we also need to add a flag so that the userspace GL driver can easily
tell if the kernel will allow ETC1 textures (on an old kernel, it will
continue to convert to RGBA8)

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt
2016-11-03 18:53:10 -07:00
parent 457e67a728
commit 7154d76fed
3 changed files with 9 additions and 0 deletions
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drivers/gpu/drm/vc4/vc4_drv.c
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@@ -78,6 +78,7 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
pm_runtime_put(&vc4->v3d->pdev->dev);
break;
case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
case DRM_VC4_PARAM_SUPPORTS_ETC1:
args->value = true;
break;
default: