From 70d17a25da21e1d497db3580ae27682952ddfd98 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Fri, 30 Jun 2017 17:26:47 -0400 Subject: [PATCH] drm/amdgpu: check scratch registers to see if we need post (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Rather than checking the CONGIG_MEMSIZE register as that may not be reliable on some APUs. v2: The scratch register is only used on CIK+ Reviewed-by: Junwei Zhang Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 5416957..d92ac5c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -736,7 +736,12 @@ bool amdgpu_need_post(struct amdgpu_device *adev) adev->has_hw_reset = false; return true; } - /* then check MEM_SIZE, in case the crtcs are off */ + + /* bios scratch used on CIK+ */ + if (adev->asic_type >= CHIP_BONAIRE) + return amdgpu_atombios_scratch_need_asic_init(adev); + + /* check MEM_SIZE for older asics */ reg = amdgpu_asic_get_config_memsize(adev); if ((reg != 0) && (reg != 0xffffffff)) -- 2.7.4