From: Hawking Zhang <hawking.zh...@amd.com>

Any dce register read back from arct is invalid. use hard code
stolen memory for arct until we validate the s3.

Signed-off-by: Hawking Zhang <hawking.zh...@amd.com>
Reviewed-by: Le Ma <le...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 11968fbe0d60..820cc6e0b51e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -641,6 +641,7 @@ static bool gmc_v9_0_keep_stolen_memory(struct 
amdgpu_device *adev)
        switch (adev->asic_type) {
        case CHIP_VEGA10:
        case CHIP_RAVEN:
+       case CHIP_ARCTURUS:
                return true;
        case CHIP_VEGA12:
        case CHIP_VEGA20:
@@ -941,7 +942,7 @@ static int gmc_v9_0_gart_init(struct amdgpu_device *adev)
 
 static unsigned gmc_v9_0_get_vbios_fb_size(struct amdgpu_device *adev)
 {
-       u32 d1vga_control = RREG32_SOC15(DCE, 0, mmD1VGA_CONTROL);
+       u32 d1vga_control;
        unsigned size;
 
        /*
@@ -951,6 +952,7 @@ static unsigned gmc_v9_0_get_vbios_fb_size(struct 
amdgpu_device *adev)
        if (gmc_v9_0_keep_stolen_memory(adev))
                return 9 * 1024 * 1024;
 
+       d1vga_control = RREG32_SOC15(DCE, 0, mmD1VGA_CONTROL);
        if (REG_GET_FIELD(d1vga_control, D1VGA_CONTROL, D1VGA_MODE_ENABLE)) {
                size = 9 * 1024 * 1024; /* reserve 8MB for vga emulator and 1 
MB for FB */
        } else {
-- 
2.20.1

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