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drm/amdgpu: fix the doorbell missing when in CGPG issue for renoir.

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[ Upstream commit 1c0539a6fc8a4a4b77278e35d763073890de96b9 ]

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: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yifan Zhang 2021-06-10 09:55:01 +08:00 committed by AuxXxilium
parent c27ec86219
commit 56a34606f0
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
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@ -1271,6 +1271,16 @@ static bool is_raven_kicker(struct amdgpu_device *adev)
return false;
}
static bool check_if_enlarge_doorbell_range(struct amdgpu_device *adev)
{
if ((adev->asic_type == CHIP_RENOIR) &&
(adev->gfx.me_fw_version >= 0x000000a5) &&
(adev->gfx.me_feature_version >= 52))
return true;
else
return false;
}
static void gfx_v9_0_check_if_need_gfxoff(struct amdgpu_device *adev)
{
if (gfx_v9_0_should_disable_gfxoff(adev->pdev))
@ -3619,7 +3629,16 @@ 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);
WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
/* If GC has entered CGPG, ringing doorbell > first page
* doesn't wakeup GC. Enlarge CP_MEC_DOORBELL_RANGE_UPPER to
* workaround this issue. And this change has to align with firmware
* update.
*/
if (check_if_enlarge_doorbell_range(adev))
WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
(adev->doorbell.size - 4));
else
WREG32_SOC15(GC, 0, mmCP_MEC_DOORBELL_RANGE_UPPER,
(adev->doorbell_index.userqueue_end * 2) << 2);
}