diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index c69ad13aab42..bb0417c52154 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1419,6 +1419,25 @@ static void intel_dp_print_rates(struct intel_dp *intel_dp) DRM_DEBUG_KMS("common rates: %s\n", str); } +static void intel_dp_print_hw_revision(struct intel_dp *intel_dp) +{ + uint8_t rev; + int len; + + if ((drm_debug & DRM_UT_KMS) == 0) + return; + + if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & + DP_DWN_STRM_PORT_PRESENT)) + return; + + len = drm_dp_dpcd_read(&intel_dp->aux, DP_BRANCH_HW_REV, &rev, 1); + if (len < 0) + return; + + DRM_DEBUG_KMS("sink hw revision: %d.%d\n", (rev & 0xf0) >> 4, rev & 0xf); +} + static int rate_to_index(int find, const int *rates) { int i = 0; @@ -4312,6 +4331,8 @@ intel_dp_long_pulse(struct intel_connector *intel_connector) intel_dp_probe_oui(intel_dp); + intel_dp_print_hw_revision(intel_dp); + intel_dp_configure_mst(intel_dp); if (intel_dp->is_mst) { |