[PATCH 2/6] drm/amdgpu/vi: add HDP asic callbacks for SI

[Samuel Li]

From: Alex Deucher <alexander.deucher at amd.com>

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

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Samuel Li <Samuel.Li at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/si.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 99760c8..ad4b19e 100644
--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -1230,6 +1230,18 @@ static void si_detect_hw_virtualization(struct amdgpu_device *adev)
 		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,
@@ -1241,6 +1253,8 @@ static const struct amdgpu_asic_funcs si_asic_funcs =
 	.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)
-- 
2.7.4