From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 6 Sep 2017 18:06:24 -0400
Subject: drm/amdgpu: add HDP asic callbacks for VI
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: dd8d07f2fb2a5acb972e62a5cd00f6d56e7d2b8c
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/vi.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -856,6 +856,18 @@ static uint32_t vi_get_rev_id(struct amd
 			>> PCIE_EFUSE4__STRAP_BIF_ATI_REV_ID__SHIFT;
 }
 
+static void vi_flush_hdp(struct amdgpu_device *adev)
+{
+	WREG32(mmHDP_MEM_COHERENCY_FLUSH_CNTL, 1);
+	RREG32(mmHDP_MEM_COHERENCY_FLUSH_CNTL);
+}
+
+static void vi_invalidate_hdp(struct amdgpu_device *adev)
+{
+	WREG32(mmHDP_DEBUG0, 1);
+	RREG32(mmHDP_DEBUG0);
+}
+
 static const struct amdgpu_asic_funcs vi_asic_funcs =
 {
 	.read_disabled_bios = &vi_read_disabled_bios,
@@ -867,6 +879,8 @@ static const struct amdgpu_asic_funcs vi
 	.set_uvd_clocks = &vi_set_uvd_clocks,
 	.set_vce_clocks = &vi_set_vce_clocks,
 	.get_config_memsize = &vi_get_config_memsize,
+	.flush_hdp = &vi_flush_hdp,
+	.invalidate_hdp = &vi_invalidate_hdp,
 };
 
 #define CZ_REV_BRISTOL(rev)	 \