drm/amd: Fix initialization for nbio 7.5.1

commit 65a24000808f70ac69bd2a96381fa0c7341f20c0 upstream.

A mistake has been made in the BIOS for some ASICs with NBIO 7.5.1
where some NBIO registers aren't properly setup.

Ensure that they're set during initialization.

Tested-by: Richard Gong <richard.gong@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_2.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_2.c
index 31776b1..4b0d563 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_2.c
@@ -382,6 +382,11 @@ static void nbio_v7_2_init_registers(struct amdgpu_device *adev)
                if (def != data)
                        WREG32_PCIE_PORT(SOC15_REG_OFFSET(NBIO, 0, regBIF1_PCIE_MST_CTRL_3), data);
                break;
+       case IP_VERSION(7, 5, 1):
+               data = RREG32_SOC15(NBIO, 0, regRCC_DEV2_EPF0_STRAP2);
+               data &= ~RCC_DEV2_EPF0_STRAP2__STRAP_NO_SOFT_RESET_DEV2_F0_MASK;
+               WREG32_SOC15(NBIO, 0, regRCC_DEV2_EPF0_STRAP2, data);
+               fallthrough;
        default:
                def = data = RREG32_PCIE_PORT(SOC15_REG_OFFSET(NBIO, 0, regPCIE_CONFIG_CNTL));
                data = REG_SET_FIELD(data, PCIE_CONFIG_CNTL,