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Commit 2fc62d51 authored by Chia-I Wu's avatar Chia-I Wu Committed by Greg Kroah-Hartman
Browse files

drm/amdgpu: fix xclk freq on CHIP_STONEY 



commit b447b079cf3a9971ea4d31301e673f49612ccc18 upstream.

According to Alex, most APUs from that time seem to have the same issue
(vbios says 48Mhz, actual is 100Mhz).  I only have a CHIP_STONEY so I
limit the fixup to CHIP_STONEY

Signed-off-by: default avatarChia-I Wu <olvaffe@gmail.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e752bb1c

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

+9 −2
Original line number Diff line number Diff line
@@ -329,8 +329,15 @@ static u32 vi_get_xclk(struct amdgpu_device *adev) 
	u32 reference_clock = adev->clock.spll.reference_freq;

	u32 tmp;



	if (adev->flags & AMD_IS_APU)

	if (adev->flags & AMD_IS_APU) {

		switch (adev->asic_type) {

		case CHIP_STONEY:

			/* vbios says 48Mhz, but the actual freq is 100Mhz */

			return 10000;

		default:

			return reference_clock;

		}

	}



	tmp = RREG32_SMC(ixCG_CLKPIN_CNTL_2);

	if (REG_GET_FIELD(tmp, CG_CLKPIN_CNTL_2, MUX_TCLK_TO_XCLK))