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    Subject[PATCH 5.3 083/135] drm/amdgpu: add warning for GRBM 1-cycle delay issue in gfx9
    Date
    From: changzhu <Changfeng.Zhu@amd.com>

    [ Upstream commit 440a7a54e7ec012ec8b27c27e460dfd6f9a24ddb ]

    It needs to add warning to update firmware in gfx9
    in case that firmware is too old to have function to
    realize dummy read in cp firmware.

    Signed-off-by: changzhu <Changfeng.Zhu@amd.com>
    Reviewed-by: Christian König <christian.koenig@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 | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    index 75faa56f243a4..b1388d3e72f74 100644
    --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
    @@ -538,6 +538,13 @@ static void gfx_v9_0_check_fw_write_wait(struct amdgpu_device *adev)
    adev->gfx.me_fw_write_wait = false;
    adev->gfx.mec_fw_write_wait = false;

    + if ((adev->gfx.mec_fw_version < 0x000001a5) ||
    + (adev->gfx.mec_feature_version < 46) ||
    + (adev->gfx.pfp_fw_version < 0x000000b7) ||
    + (adev->gfx.pfp_feature_version < 46))
    + DRM_WARN_ONCE("Warning: check cp_fw_version and update it to realize \
    + GRBM requires 1-cycle delay in cp firmware\n");
    +
    switch (adev->asic_type) {
    case CHIP_VEGA10:
    if ((adev->gfx.me_fw_version >= 0x0000009c) &&
    --
    2.20.1


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