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drm/i915/skl: Enable DDI-E

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There are OEMs using DDI-E out there,
so let's enable it.

Unfortunately there is no detection bit for DDI-E
So we need to rely on VBT for that.

I also need to give credits to Xiong since before seing
his approach to check info->support_* I was creating an ugly
vbt->ddie_sfuse_strap in order to propagate the ddi presence info

v2: Rebased as last patch in the series. since all other patches
in this series are needed for anything working propperly on DDI-E.

Credits-to: "Zhang, Xiong Y" <xiong.y.zhang@intel.com>
Cc: "Zhang, Xiong Y" <xiong.y.zhang@intel.com>
Reviewed-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Rodrigo Vivi
2015-08-07 17:35:21 -07:00
committed by Jani Nikula
parent 11c1b657c4
commit 2800e4c228
3 changed files with 18 additions and 7 deletions
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14
drivers/gpu/drm/i915/intel_bios.c
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@@ -909,19 +909,19 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
/* Each DDI port can have more than one value on the "DVO Port" field,
* so look for all the possible values for each port and abort if more
* than one is found. */
int dvo_ports[][2] = {
{DVO_PORT_HDMIA, DVO_PORT_DPA},
{DVO_PORT_HDMIB, DVO_PORT_DPB},
{DVO_PORT_HDMIC, DVO_PORT_DPC},
{DVO_PORT_HDMID, DVO_PORT_DPD},
{DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
int dvo_ports[][3] = {
{DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
{DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
{DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
{DVO_PORT_HDMID, DVO_PORT_DPD, -1},
{DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
};
/* Find the child device to use, abort if more than one found. */
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
it = dev_priv->vbt.child_dev + i;
for (j = 0; j < 2; j++) {
for (j = 0; j < 3; j++) {
if (dvo_ports[port][j] == -1)
break;