drm/i915: read full receiver capability field during DP hot plug
Read link status first, followed by the full DPCD receiver cap field
rather than just the first 8 bytes.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Adam Jackson <ajax@redhat.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 8139394..e0ff908 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -36,7 +36,7 @@
#include "i915_drv.h"
#include "drm_dp_helper.h"
-
+#define DP_RECEIVER_CAP_SIZE 0xf
#define DP_LINK_STATUS_SIZE 6
#define DP_LINK_CHECK_TIMEOUT (10 * 1000)
@@ -53,7 +53,7 @@
int dpms_mode;
uint8_t link_bw;
uint8_t lane_count;
- uint8_t dpcd[8];
+ uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
struct i2c_adapter adapter;
struct i2c_algo_dp_aux_data algo;
bool is_pch_edp;