drm/i915/dp: Read more DPCD registers on connection probe

For parity with radeon and nouveau, and also because I suspect we're
going to need it to get format-conversion dongles right.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 0be85a0..2f0566b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -52,7 +52,7 @@ struct intel_dp {
        uint32_t color_range;
        uint8_t link_bw;
        uint8_t lane_count;
-       uint8_t dpcd[4];
+       uint8_t dpcd[8];
        struct i2c_adapter adapter;
        struct i2c_algo_dp_aux_data algo;
        bool is_pch_edp;
@@ -1678,8 +1678,10 @@ intel_dp_detect(struct drm_connector *connector, bool force)
        else
                status = g4x_dp_detect(intel_dp);
 
-       DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0],
-                     intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]);
+       DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx%hx%hx%hx%hx\n", intel_dp->dpcd[0],
+                     intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3],
+                     intel_dp->dpcd[4], intel_dp->dpcd[5], intel_dp->dpcd[6],
+                     intel_dp->dpcd[7]);
 
        if (status != connector_status_connected)
                return status;