1 files changed, 34 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4275-drm-amdgpu-sdma5-do-not-execute-0-sized-IBs-v2.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4275-drm-amdgpu-sdma5-do-not-execute-0-sized-IBs-v2.patch
new file mode 100644
index 00000000..dcff327b
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4275-drm-amdgpu-sdma5-do-not-execute-0-sized-IBs-v2.patch
@@ -0,0 +1,34 @@
+From 99c7a912113644a9ab79ca59b5964473930f962d Mon Sep 17 00:00:00 2001
+From: "Pelloux-prayer, Pierre-eric" <Pierre-eric.Pelloux-prayer@amd.com>
+Date: Tue, 22 Oct 2019 19:22:11 +0200
+Subject: [PATCH 4275/4736] drm/amdgpu/sdma5: do not execute 0-sized IBs (v2)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This seems to help with https://bugs.freedesktop.org/show_bug.cgi?id=111481.
+
+v2: insert a NOP instead of skipping all 0-sized IBs to avoid breaking older hw
+
+Change-Id: I5df87b3e4eb920c645307425f7b72c430704939a
+Signed-off-by: Pelloux-prayer, Pierre-eric <Pierre-eric.Pelloux-prayer@amd.com>
+Reviewed-by: Christian König <christian.koenig@amd.com>
+---
+ drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+index 6a73e8d95f0a..3b00bce14cfb 100644
+--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
++++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+@@ -309,6 +309,7 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
+ 
+ 	job->vm_pd_addr = amdgpu_gmc_pd_addr(adev->gart.bo);
+ 	job->vm_needs_flush = true;
++	job->ibs->ptr[job->ibs->length_dw++] = ring->funcs->nop;
+ 	amdgpu_ring_pad_ib(ring, &job->ibs[0]);
+ 	r = amdgpu_job_submit(job, &adev->mman.entity,
+ 			      AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
+-- 
+2.17.1
+