diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1616-drm-amdgpu-limit-the-number-of-IVs-processed-at-once.patch')
-rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.19.8/1616-drm-amdgpu-limit-the-number-of-IVs-processed-at-once.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1616-drm-amdgpu-limit-the-number-of-IVs-processed-at-once.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1616-drm-amdgpu-limit-the-number-of-IVs-processed-at-once.patch new file mode 100644 index 00000000..2f1ea252 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1616-drm-amdgpu-limit-the-number-of-IVs-processed-at-once.patch @@ -0,0 +1,57 @@ +From 9a719637a116b7040b6dc0c1889c558fa2a78a39 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com> +Date: Tue, 5 Mar 2019 15:13:52 +0100 +Subject: [PATCH 1616/2940] drm/amdgpu: limit the number of IVs processed at + once +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Only process a maximum of 32 IVs before writing back the RPTR. This improves +hw handling when we get close to an overflow in the ring buffer. + +Signed-off-by: Christian König <christian.koenig@amd.com> +Reviewed-by: Michel Dänzer <michel.daenzer@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 3 ++- + drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h | 3 +++ + 2 files changed, 5 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +index 1c50be3ab8a9..934dfdcb4e73 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c +@@ -142,6 +142,7 @@ void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) + */ + int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) + { ++ unsigned int count = AMDGPU_IH_MAX_NUM_IVS; + u32 wptr; + + if (!ih->enabled || adev->shutdown) +@@ -159,7 +160,7 @@ int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) + /* Order reading of wptr vs. reading of IH ring data */ + rmb(); + +- while (ih->rptr != wptr) { ++ while (ih->rptr != wptr && --count) { + amdgpu_irq_dispatch(adev, ih); + ih->rptr &= ih->ptr_mask; + } +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h +index 113a1ba13d4a..4e0bb645176d 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h +@@ -24,6 +24,9 @@ + #ifndef __AMDGPU_IH_H__ + #define __AMDGPU_IH_H__ + ++/* Maximum number of IVs processed at once */ ++#define AMDGPU_IH_MAX_NUM_IVS 32 ++ + struct amdgpu_device; + struct amdgpu_iv_entry; + +-- +2.17.1 + |