This is a note to let you know that I've just added the patch titled drm/amdgpu/gfx10: enlarge CP_MEC_DOORBELL_RANGE_UPPER to cover full doorbell. to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-gfx10-enlarge-cp_mec_doorbell_range_upper-to-cover-full-doorbell.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3 Mon Sep 17 00:00:00 2001 From: Yifan Zhang <yifan1.zhang@xxxxxxx> Date: Thu, 10 Jun 2021 10:10:07 +0800 Subject: drm/amdgpu/gfx10: enlarge CP_MEC_DOORBELL_RANGE_UPPER to cover full doorbell. From: Yifan Zhang <yifan1.zhang@xxxxxxx> commit 1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3 upstream. If GC has entered CGPG, ringing doorbell > first page doesn't wakeup GC. Enlarge CP_MEC_DOORBELL_RANGE_UPPER to workaround this issue. Signed-off-by: Yifan Zhang <yifan1.zhang@xxxxxxx> Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c @@ -6590,8 +6590,12 @@ static int gfx_v10_0_kiq_init_register(s if (ring->use_doorbell) { WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_LOWER, (adev->doorbell_index.kiq * 2) << 2); + /* If GC has entered CGPG, ringing doorbell > first page doesn't + * wakeup GC. Enlarge CP_MEC_DOORBELL_RANGE_UPPER to workaround + * this issue. + */ WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER, - (adev->doorbell_index.userqueue_end * 2) << 2); + (adev->doorbell.size - 4)); } WREG32_SOC15(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL, Patches currently in stable-queue which might be from yifan1.zhang@xxxxxxx are queue-5.10/drm-amdgpu-gfx10-enlarge-cp_mec_doorbell_range_upper-to-cover-full-doorbell.patch queue-5.10/drm-amdgpu-gfx9-fix-the-doorbell-missing-when-in-cgpg-issue.patch