diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-01-28 12:37:50 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-02-01 11:33:23 +0200 |
| commit | f0d4ce59f4d48622044933054a0e0cefa91ba15e (patch) | |
| tree | b0846093dd716923731bdc3d29082ea38bdf196f /mm | |
| parent | a35eca01c372dc0f1a3ad663c6a93604c603a782 (diff) | |
drm/i915: Disable DRRS on IVB/HSW port != A
Currently we allow DRRS on IVB PCH ports, but we're missing a
few programming steps meaning it is guaranteed to not work.
And on HSW DRRS is not supported on anything but port A ever
as only transcoder EDP has the M2/N2 registers (though I'm
not sure if HSW ever has eDP on any other port).
Starting from BDW all transcoders have the dynamically
reprogrammable M/N registers so DRRS could work on any
port.
Stop initializing DRRS on ports where it cannot possibly work.
Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220128103757.22461-11-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions