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drm/amdgpu: bypass hdp read cache invalidation for aldebaran (v2) 

hdp read cache is removed in aldebaran. don't issue
an mmio write or write data packet to hardware.

v2: rebase

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang 2020-12-22 15:55:35 +08:00 committed by Alex Deucher
parent b7daed1b62
commit d02692ae0d
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c
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@ -49,6 +49,9 @@ static void hdp_v4_0_flush_hdp(struct amdgpu_device *adev,
static void hdp_v4_0_invalidate_hdp(struct amdgpu_device *adev,
struct amdgpu_ring *ring)
{
if (adev->asic_type == CHIP_ALDEBARAN)
return;
if (!ring || !ring->funcs->emit_wreg)
WREG32_SOC15_NO_KIQ(HDP, 0, mmHDP_READ_CACHE_INVALIDATE, 1);
else