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    Subject[PATCH AUTOSEL 5.13 113/189] drm/amdgpu/gfx9: fix the doorbell missing when in CGPG issue.
    Date
    From: Yifan Zhang <yifan1.zhang@amd.com>

    [ Upstream commit 631003101c516ea29a74aee59666708857b9a805 ]

    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@amd.com>
    Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 6 +++++-
    1 file changed, 5 insertions(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    index 516467e962b7..c09225d065c2 100644
    --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    @@ -3673,8 +3673,12 @@ static int gfx_v9_0_kiq_init_register(struct amdgpu_ring *ring)
    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_RLC(GC, 0, mmCP_HQD_PQ_DOORBELL_CONTROL,
    --
    2.30.2
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