-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Tested-by: Marco Nenciarini <[email protected]>
Tested on a Dell Pro Max 16 (Arrow Lake-P) with Debian 7.2.6 and a Dell WD19DC dock (Synaptics VMM5331 MST hub, fw 05.07.08) with two monitors behind it, i915 driving the dock over TBT-alt. Without the patch, a DPMS off of more than about 6 s leaves both monitors black on wake: the link status of the sink behind the hub goes from 0x77 to 0x00 and the hub does not retrain it. With the patch, 30 s, 60 s and 120 s DPMS off all kept the link and both monitors came back. The log shows MSTM_CTRL cleared before D3 and restored after D0, before POWER_UP_PHY, as intended. Details are in drm/i915/kernel#16901. -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEfCO4BD5l0pgKIbbiWJ8D8BulUDgFAmrPUYUACgkQWJ8D8Bul UDimag/+L0A6aKYws/asUDWsKnx4DjKXbQtXjYCVXx8Sqv7wG7PgYvXOONOJzvD1 dxUOxuWLDBx6sRBA6zLmtIdkkifPUHbWhADQLIOnmNqIGutzjg/Rg/TIqmtufy+w J4lxsmO6khoLa16dZZMp9p4CYgQMOd36NuWG/uSBNcNF96uxzZYjCoO5uXorCkg/ 7SCa2neKrIoXXwSEuamQC3FB83I0PXoaxP/FgzZmYDzN1IEUya4EkS78jIPCGmWC 54gz9+hNz0yRT7IgfoluNzHVnP8GftLS7t2DPH1ClZVxw6bE+UnBwpJRQ9mpCkXd DX3RCZq9E176ESqIDKI/4d+nO8AKQp06aiOExDylNU38NlSNOpPH8iN4XqwYZ2hv WlpR33hPneA1zosdZ6oFOAPNDLvF1FFuUFtA+wVLJLNNoNTRAVseHGZsR/xdL7kh X0gIyu1h2SP4wfKySiuvUmgQVm0uFphr4x+FgKn1XoZ+P0CDyjxqoFVDvE8iplb4 1IixcQAPvFasF7wq3pd2eAUh7n2zMcroi99cllGY2uPbxiOPhiWzcVV1NmQ7nHhq uFcyTlM8nV+TdZYYGCRLFkH7MHskzEGbKO+CQkYrayRPcZxZwnytnHY+CyqGr4sY 732Djo9oELBZF/fYhSBiVi7cij0NFDdadvhV1gfThIT7BH+5qhs= =2SVO -----END PGP SIGNATURE-----
