From 03ba88cfdc671354c5c81ac717b51def6b46a1cc Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 24 Jul 2017 22:52:12 -0400
Subject: [PATCH] drm/amdgpu/gmc6: disable legacy vga features in gmc init (v2)
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Needs to be done when the MC is set up.
v2: make consistent with other asics
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
index 886df0902067..93c45f26b7c8 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
@@ -249,7 +249,19 @@ static void gmc_v6_0_mc_program(struct amdgpu_device *adev)
dev_warn(adev->dev, "Wait for MC idle timedout !\n");
}
- WREG32(mmVGA_HDP_CONTROL, VGA_HDP_CONTROL__VGA_MEMORY_DISABLE_MASK);
+ if (adev->mode_info.num_crtc) {
+ u32 tmp;
+
+ /* Lockout access through VGA aperture*/
+ tmp = RREG32(mmVGA_HDP_CONTROL);
+ tmp |= VGA_HDP_CONTROL__VGA_MEMORY_DISABLE_MASK;
+ WREG32(mmVGA_HDP_CONTROL, tmp);
+
+ /* disable VGA render */
+ tmp = RREG32(mmVGA_RENDER_CONTROL);
+ tmp &= ~VGA_VSTATUS_CNTL;
+ WREG32(mmVGA_RENDER_CONTROL, tmp);
+ }
/* Update configuration */
WREG32(mmMC_VM_SYSTEM_APERTURE_LOW_ADDR,
adev->mc.vram_start >> 12);
--
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