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drm/i915/dp: Read DP descriptor for eDP and LSPCON too

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As for external DP sink and branch devices read and print the DP
descriptor for eDP and LSPCON devices as well to aid debugging.

v2:
- Split out this change to a separate patch. (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-7-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak
2016-10-24 19:33:29 +03:00
parent 24e807e79f
commit 12a47a4228
3 changed files with 6 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_dp.c
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@@ -1461,7 +1461,7 @@ __intel_dp_read_desc(struct intel_dp *intel_dp, struct intel_dp_desc *desc)
sizeof(*desc);
}
static bool intel_dp_read_desc(struct intel_dp *intel_dp)
bool intel_dp_read_desc(struct intel_dp *intel_dp)
{
struct intel_dp_desc *desc = &intel_dp->desc;
bool oui_sup = intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] &
@@ -3521,6 +3521,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
if (!intel_dp_read_dpcd(intel_dp))
return false;
intel_dp_read_desc(intel_dp);
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
dev_priv->no_aux_handshake = intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
DP_NO_AUX_HANDSHAKE_LINK_TRAINING;