From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 6 Sep 2017 18:05:43 -0400
Subject: drm/amdgpu: add HDP asic callbacks for SI
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Git-commit: 2d5e0807edf3a3ff44e52ab8ab3cfd675f6c8dad
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Needed to flush and invalidate the HDP block using the CPU.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Samuel Li <Samuel.Li@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/si.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -1231,6 +1231,18 @@ static void si_detect_hw_virtualization(
 		adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE;
 }
 
+static void si_flush_hdp(struct amdgpu_device *adev)
+{
+	WREG32(mmHDP_MEM_COHERENCY_FLUSH_CNTL, 1);
+	RREG32(mmHDP_MEM_COHERENCY_FLUSH_CNTL);
+}
+
+static void si_invalidate_hdp(struct amdgpu_device *adev)
+{
+	WREG32(mmHDP_DEBUG0, 1);
+	RREG32(mmHDP_DEBUG0);
+}
+
 static const struct amdgpu_asic_funcs si_asic_funcs =
 {
 	.read_disabled_bios = &si_read_disabled_bios,
@@ -1242,6 +1254,8 @@ static const struct amdgpu_asic_funcs si
 	.set_uvd_clocks = &si_set_uvd_clocks,
 	.set_vce_clocks = NULL,
 	.get_config_memsize = &si_get_config_memsize,
+	.flush_hdp = &si_flush_hdp,
+	.invalidate_hdp = &si_invalidate_hdp,
 };
 
 static uint32_t si_get_rev_id(struct amdgpu_device *adev)