[SRU][U][PATCH 2/8] drm/i915/display: Add intel_legacy_aux_to_power_domain()

[You-Sheng Yang]

From: José Roberto de Souza <jose.souza at intel.com>

BugLink: https://bugs.launchpad.net/bugs/1868936

This is a similar function to intel_aux_power_domain() but it do not
care about TBT ports, this will be needed by ICL TC sequences.

v2:
- renamed to intel_legacy_aux_to_power_domain()

Cc: Imre Deak <imre.deak at intel.com>
Cc: Cooper Chiou <cooper.chiou at intel.com>
Cc: Kai-Heng Feng <kai.heng.feng at canonical.com>
Reviewed-by: Imre Deak <imre.deak at intel.com>
Tested-by: You-Sheng Yang <vicamo.yang at canonical.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200414194956.164323-2-jose.souza@intel.com
(cherry picked from drm-tip commit dba6b0b4eab362a886db616ee38c1d624914d98b)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 14 ++++++++++++--
 drivers/gpu/drm/i915/display/intel_display.h |  2 ++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index aa453953908b..4c6f9e1628f3 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7212,7 +7212,17 @@ intel_aux_power_domain(struct intel_digital_port *dig_port)
 		}
 	}
 
-	switch (dig_port->aux_ch) {
+	return intel_legacy_aux_to_power_domain(dig_port->aux_ch);
+}
+
+/*
+ * Converts aux_ch to power_domain without caring about TBT ports for that use
+ * intel_aux_power_domain()
+ */
+enum intel_display_power_domain
+intel_legacy_aux_to_power_domain(enum aux_ch aux_ch)
+{
+	switch (aux_ch) {
 	case AUX_CH_A:
 		return POWER_DOMAIN_AUX_A;
 	case AUX_CH_B:
@@ -7228,7 +7238,7 @@ intel_aux_power_domain(struct intel_digital_port *dig_port)
 	case AUX_CH_G:
 		return POWER_DOMAIN_AUX_G;
 	default:
-		MISSING_CASE(dig_port->aux_ch);
+		MISSING_CASE(aux_ch);
 		return POWER_DOMAIN_AUX_A;
 	}
 }
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 028aab728514..dd1215106d4a 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -572,6 +572,8 @@ void hsw_disable_ips(const struct intel_crtc_state *crtc_state);
 enum intel_display_power_domain intel_port_to_power_domain(enum port port);
 enum intel_display_power_domain
 intel_aux_power_domain(struct intel_digital_port *dig_port);
+enum intel_display_power_domain
+intel_legacy_aux_to_power_domain(enum aux_ch aux_ch);
 void intel_mode_from_pipe_config(struct drm_display_mode *mode,
 				 struct intel_crtc_state *pipe_config);
 void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
-- 
2.25.1