drm/i915: Move aux_ch to intel_digital_port

From ICL onwards all DDI/TypeC ports - even working in HDMI mode - need
to know their corresponding AUX CH, so move the field to a common
struct.

No functional change.

v3:
- Add code comment about which ports aux_ch is used for. (Jose)

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101140427.31026-3-imre.deak@intel.com

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 5468018365a3..78b96e86d8ef 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2084,6 +2084,8 @@ out:
 static inline enum intel_display_power_domain
 intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
 {
+	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+
 	/* CNL+ HW requires corresponding AUX IOs to be powered up for PSR with
 	 * DC states enabled at the same time, while for driver initiated AUX
 	 * transfers we need the same AUX IOs to be powered but with DC states
@@ -2096,7 +2098,7 @@ intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
 	 * Note that PSR is enabled only on Port A even though this function
 	 * returns the correct domain for other ports too.
 	 */
-	return intel_dp->aux_ch == AUX_CH_A ? POWER_DOMAIN_AUX_IO_A :
+	return dig_port->aux_ch == AUX_CH_A ? POWER_DOMAIN_AUX_IO_A :
 					      intel_dp->aux_power_domain;
 }