drm/amdgpu: add HDP asic callbacks for SI

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>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 543101d5a5ed..f61a431b9553 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)