drm/amdgpu: check scratch registers to see if we need post (v2) (70d17a25) · Commits · 戴 / test

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:

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -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))