drm/vc4: Add support for rendering with ETC1 textures.
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>
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@ -78,6 +78,7 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
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pm_runtime_put(&vc4->v3d->pdev->dev);
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break;
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case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
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case DRM_VC4_PARAM_SUPPORTS_ETC1:
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args->value = true;
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break;
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default:
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@ -644,6 +644,13 @@ reloc_tex(struct vc4_exec_info *exec,
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cpp = 1;
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break;
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case VC4_TEXTURE_TYPE_ETC1:
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/* ETC1 is arranged as 64-bit blocks, where each block is 4x4
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* pixels.
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*/
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cpp = 8;
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width = (width + 3) >> 2;
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height = (height + 3) >> 2;
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break;
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case VC4_TEXTURE_TYPE_BW1:
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case VC4_TEXTURE_TYPE_A4:
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case VC4_TEXTURE_TYPE_A1:
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@ -286,6 +286,7 @@ struct drm_vc4_get_hang_state {
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#define DRM_VC4_PARAM_V3D_IDENT1 1
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#define DRM_VC4_PARAM_V3D_IDENT2 2
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#define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3
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#define DRM_VC4_PARAM_SUPPORTS_ETC1 4
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struct drm_vc4_get_param {
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__u32 param;
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