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)

Eric Anholt committed 10 years ago

Commit 7154d761 parent 457e67a3 files · +9 −0Browse files

Unified · Split

3 files

drivers/gpu/drm/vc4/vc4_drv.c +1 −0
drivers/gpu/drm/vc4/vc4_validate.c +7 −0
include/uapi/drm/vc4_drm.h +1 −0

drivers/gpu/drm/vc4/vc4_drv.c+1−0

@@ -78,6 +78,7 @@ static int vc4_get_param_ioctl(struct drm_device dev, void data, · 77 unmodified lines
78	78	pm_runtime_put(&vc4->v3d->pdev->dev);
79	79	break;
80	80	case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
	81	+ case DRM_VC4_PARAM_SUPPORTS_ETC1:
81	82	args->value = true;
82	83	break;
83	84	default:

drivers/gpu/drm/vc4/vc4_validate.c+7−0

@@ -644,6 +644,13 @@ reloc_tex(struct vc4_exec_info *exec, · 643 unmodified lines
644	644	cpp = 1;
645	645	break;
646	646	case VC4_TEXTURE_TYPE_ETC1:
	647	+ /* ETC1 is arranged as 64-bit blocks, where each block is 4x4
	648	+ * pixels.
	649	+ */
	650	+ cpp = 8;
	651	+ width = (width + 3) >> 2;
	652	+ height = (height + 3) >> 2;
	653	+ break;
647	654	case VC4_TEXTURE_TYPE_BW1:
648	655	case VC4_TEXTURE_TYPE_A4:
649	656	case VC4_TEXTURE_TYPE_A1:

include/uapi/drm/vc4_drm.h+1−0

@@ -286,6 +286,7 @@ struct drm_vc4_get_hang_state { · 285 unmodified lines
286	286	#define DRM_VC4_PARAM_V3D_IDENT1 1
287	287	#define DRM_VC4_PARAM_V3D_IDENT2 2
288	288	#define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3
	289	+#define DRM_VC4_PARAM_SUPPORTS_ETC1 4
289	290
290	291	struct drm_vc4_get_param {
291	292	__u32 param;