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Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0163-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch')
-rw-r--r--target/linux/brcm2708/patches-4.9/950-0163-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch55
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0163-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch b/target/linux/brcm2708/patches-4.9/950-0163-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch
new file mode 100644
index 0000000..2b81578
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/950-0163-drm-vc4-Add-support-for-rendering-with-ETC1-textures.patch
@@ -0,0 +1,55 @@
+From 4b1b99ebbada744ef72af56b022492609feb9bba 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
+@@ -78,6 +78,7 @@ 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;