Commit 5c46c492 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/gmc10: remove dummy read workaround for newer chips 



Sienna Cichlid and newer have a hw fix so no longer require
the workaround.

Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1ed685df

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

+4 −2
Original line number Diff line number Diff line
@@ -107,7 +107,8 @@ static int gmc_v10_0_process_interrupt(struct amdgpu_device *adev, 
		 * be updated to avoid reading an incorrect value due to

		 * the new fast GRBM interface.

		 */

		if (entry->vmid_src == AMDGPU_GFXHUB_0)

		if ((entry->vmid_src == AMDGPU_GFXHUB_0) &&

		    (adev->asic_type < CHIP_SIENNA_CICHLID))

			RREG32(hub->vm_l2_pro_fault_status);



		status = RREG32(hub->vm_l2_pro_fault_status);
@@ -232,7 +233,8 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid, 
	 * Issue a dummy read to wait for the ACK register to be cleared

	 * to avoid a false ACK due to the new fast GRBM interface.

	 */

	if (vmhub == AMDGPU_GFXHUB_0)

	if ((vmhub == AMDGPU_GFXHUB_0) &&

	    (adev->asic_type < CHIP_SIENNA_CICHLID))

		RREG32_NO_KIQ(hub->vm_inv_eng0_req + hub->eng_distance * eng);



	/* Wait for ACK with a delay.*/