diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_aux.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 5a176bfb10a2..96967e21c94c 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -6,6 +6,7 @@ #include "i915_drv.h" #include "i915_reg.h" #include "i915_trace.h" +#include "intel_bios.h" #include "intel_de.h" #include "intel_display_types.h" #include "intel_dp_aux.h" @@ -737,3 +738,37 @@ void intel_dp_aux_init(struct intel_dp *intel_dp) intel_dp->aux.transfer = intel_dp_aux_transfer; cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE); } + +static enum aux_ch default_aux_ch(struct intel_encoder *encoder) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + + /* SKL has DDI E but no AUX E */ + if (DISPLAY_VER(i915) == 9 && encoder->port == PORT_E) + return AUX_CH_A; + + return (enum aux_ch)encoder->port; +} + +enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + enum aux_ch aux_ch; + + aux_ch = intel_bios_dp_aux_ch(encoder->devdata); + if (aux_ch != AUX_CH_NONE) { + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] using AUX %c (VBT)\n", + encoder->base.base.id, encoder->base.name, + aux_ch_name(aux_ch)); + return aux_ch; + } + + aux_ch = default_aux_ch(encoder); + + drm_dbg_kms(&i915->drm, + "[ENCODER:%d:%s] using AUX %c (platform default)\n", + encoder->base.base.id, encoder->base.name, + aux_ch_name(aux_ch)); + + return aux_ch; +} |