diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0538-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0538-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0538-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch b/target/linux/brcm2708/patches-4.4/0538-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch new file mode 100644 index 0000000000..f9be55a6ba --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0538-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch @@ -0,0 +1,55 @@ +From 466102927ee6a21eb58d0f5f98b85155e7ee8e5b Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Thu, 3 Nov 2016 18:53:10 -0700 +Subject: [PATCH] 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> +(cherry picked from commit 7154d76fedf549607afbc0d13db9aaf02da5cebf) +--- + drivers/gpu/drm/vc4/vc4_drv.c | 1 + + drivers/gpu/drm/vc4/vc4_validate.c | 7 +++++++ + include/uapi/drm/vc4_drm.h | 1 + + 3 files changed, 9 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_drv.c ++++ b/drivers/gpu/drm/vc4/vc4_drv.c +@@ -103,6 +103,7 @@ static int vc4_get_param_ioctl(struct dr + 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: +--- a/drivers/gpu/drm/vc4/vc4_validate.c ++++ b/drivers/gpu/drm/vc4/vc4_validate.c +@@ -644,6 +644,13 @@ reloc_tex(struct vc4_exec_info *exec, + cpp = 1; + break; + case VC4_TEXTURE_TYPE_ETC1: ++ /* ETC1 is arranged as 64-bit blocks, where each block is 4x4 ++ * pixels. ++ */ ++ cpp = 8; ++ width = (width + 3) >> 2; ++ height = (height + 3) >> 2; ++ break; + case VC4_TEXTURE_TYPE_BW1: + case VC4_TEXTURE_TYPE_A4: + case VC4_TEXTURE_TYPE_A1: +--- a/include/uapi/drm/vc4_drm.h ++++ b/include/uapi/drm/vc4_drm.h +@@ -286,6 +286,7 @@ struct drm_vc4_get_hang_state { + #define DRM_VC4_PARAM_V3D_IDENT1 1 + #define DRM_VC4_PARAM_V3D_IDENT2 2 + #define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3 ++#define DRM_VC4_PARAM_SUPPORTS_ETC1 4 + + struct drm_vc4_get_param { + __u32 param; |