Commit 28ca6931 authored by Imre Deak's avatar Imre Deak

drm/i915/bxt: Add a note about BXT_PORT_CL1CM_DW30 being read-only

This register is read-only, so we have never actually set
OCL2_LDOFUSE_PWR_DIS in it as specified by the specification. Add a code
comment about this. I filed a specification update request to clarify
this there.

CC: Arthur J Runyan <arthur.j.runyan@intel.com>
Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Reviewed-by: default avatarDavid Weinehall <david.weinehall@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459515767-29228-4-git-send-email-imre.deak@intel.com
parent d1e082ff
......@@ -1798,6 +1798,9 @@ static void broxton_phy_init(struct drm_i915_private *dev_priv,
* enabled.
* TODO: port C is only connected on BXT-P, so on BXT0/1 we should
* power down the second channel on PHY0 as well.
*
* FIXME: Clarify programming of the following, the register is
* read-only with bit 6 fixed at 0 at least in stepping A.
*/
if (phy == DPIO_PHY1)
val |= OCL2_LDOFUSE_PWR_DIS;
......
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