[PATCH 3/4] drm/amdgpu/gmc8: disable legacy vga features in gmc init

[Alex Deucher]

Needs to be done when the MC is set up.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 04da556..8e20e50 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -35,6 +35,9 @@
 #include "oss/oss_3_0_d.h"
 #include "oss/oss_3_0_sh_mask.h"
 
+#include "dce/dce_10_0_d.h"
+#include "dce/dce_10_0_sh_mask.h"
+
 #include "vid.h"
 #include "vi.h"
 
@@ -438,6 +441,17 @@ static void gmc_v8_0_mc_program(struct amdgpu_device *adev)
 	if (gmc_v8_0_wait_for_idle((void *)adev)) {
 		dev_warn(adev->dev, "Wait for MC idle timedout !\n");
 	}
+	if (adev->mode_info.num_crtc) {
+		/* Lockout access through VGA aperture*/
+		tmp = RREG32(mmVGA_HDP_CONTROL);
+		tmp = REG_SET_FIELD(tmp, VGA_HDP_CONTROL, VGA_MEMORY_DISABLE, 1);
+		WREG32(mmVGA_HDP_CONTROL, tmp);
+
+		/* disable VGA render */
+		tmp = RREG32(mmVGA_RENDER_CONTROL);
+		tmp = REG_SET_FIELD(tmp, VGA_RENDER_CONTROL, VGA_VSTATUS_CNTL, 0);
+		WREG32(mmVGA_RENDER_CONTROL, tmp);
+	}
 	/* Update configuration */
 	WREG32(mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
 	       adev->mc.vram_start >> 12);
-- 
2.5.5