[PATCH 09/11] drm/i915/dp-mst: switch to drm_dp_dpcd_read_byte()

[Jani Nikula <jani.nikula@intel.com>]

Switch to the modern DPCD access functions that return negative error
codes on errors, -EIO for incomplete access, and 0 on success.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 6a869d0f6ffc..87aea2a8ee69 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -2230,7 +2230,7 @@ bool intel_dp_mst_verify_dpcd_state(struct intel_dp *intel_dp)
 	if (!intel_dp->is_mst)
 		return true;
 
-	ret = drm_dp_dpcd_readb(intel_dp->mst.mgr.aux, DP_MSTM_CTRL, &val);
+	ret = drm_dp_dpcd_read_byte(intel_dp->mst.mgr.aux, DP_MSTM_CTRL, &val);
 
 	/* Adjust the expected register value for SST + SideBand. */
 	if (ret < 0 || val != (DP_MST_EN | DP_UP_REQ_EN | DP_UPSTREAM_IS_SRC)) {
-- 
2.47.3