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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0480-drm-vc4-Add-a-getparam-to-signal-support-for-branche.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0480-drm-vc4-Add-a-getparam-to-signal-support-for-branche.patch38
1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0480-drm-vc4-Add-a-getparam-to-signal-support-for-branche.patch b/target/linux/brcm2708/patches-4.4/0480-drm-vc4-Add-a-getparam-to-signal-support-for-branche.patch
new file mode 100644
index 0000000000..63c0445c50
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0480-drm-vc4-Add-a-getparam-to-signal-support-for-branche.patch
@@ -0,0 +1,38 @@
+From f6b1410aedc0c8d04363a930fd70509e30e23eeb Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Sat, 2 Jul 2016 14:14:27 -0700
+Subject: [PATCH] drm/vc4: Add a getparam to signal support for branches.
+
+Userspace needs to know if it can create shaders that do branching.
+Otherwise, for backwards compatibility with old kernels it needs to
+lower if statements to conditional assignments.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+(cherry picked from commit 7363cee5b467c31dc3af2ac98df0634bb8bbc668)
+---
+ drivers/gpu/drm/vc4/vc4_drv.c | 3 +++
+ include/uapi/drm/vc4_drm.h | 1 +
+ 2 files changed, 4 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_drv.c
++++ b/drivers/gpu/drm/vc4/vc4_drv.c
+@@ -97,6 +97,9 @@ static int vc4_get_param_ioctl(struct dr
+ args->value = V3D_READ(V3D_IDENT2);
+ pm_runtime_put(&vc4->v3d->pdev->dev);
+ break;
++ case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
++ args->value = true;
++ break;
+ default:
+ DRM_DEBUG("Unknown parameter %d\n", args->param);
+ return -EINVAL;
+--- a/include/uapi/drm/vc4_drm.h
++++ b/include/uapi/drm/vc4_drm.h
+@@ -285,6 +285,7 @@ struct drm_vc4_get_hang_state {
+ #define DRM_VC4_PARAM_V3D_IDENT0 0
+ #define DRM_VC4_PARAM_V3D_IDENT1 1
+ #define DRM_VC4_PARAM_V3D_IDENT2 2
++#define DRM_VC4_PARAM_SUPPORTS_BRANCHES 3
+
+ struct drm_vc4_get_param {
+ __u32 param;