[Intel-gfx] [RFC v2] drm/i915: lpsp with hdmi/dp outputs

[Anshuman Gupta]

DG1 and DISPLAY_VER=13 onwards Audio MMIO/VERBS lies in PG0 power
well. So in order to detect audio capable DP/HDMI output it doesn't
require to enable PG3 power well on DG1 and PG2 on DISPLAY_VER=13
pltform. It will save the power when DP/HDMI outputs used as
lpsp configuration.

B.Spec: 49233
B.Spec: 49231

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Kai Vehmanen <kai.vehmanen at linux.intel.com>
Cc: Uma Shankar <uma.shankar at intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 6280ba7f4c17..16bfa7628970 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3536,8 +3536,13 @@ static u64 get_crtc_power_domains(struct intel_crtc_state *crtc_state)
 		mask |= BIT_ULL(intel_encoder->power_domain);
 	}
 
-	if (HAS_DDI(dev_priv) && crtc_state->has_audio)
-		mask |= BIT_ULL(POWER_DOMAIN_AUDIO);
+	if (HAS_DDI(dev_priv) && crtc_state->has_audio) {
+		/* if Audio mmio/verbs lies in PG0 */
+		if (IS_DG1(dev_priv) || DISPLAY_VER(dev_priv) >= 11)
+			mask |= BIT_ULL(POWER_DOMAIN_DISPLAY_CORE);
+		else
+			mask |= BIT_ULL(POWER_DOMAIN_AUDIO);
+	}
 
 	if (crtc_state->shared_dpll)
 		mask |= BIT_ULL(POWER_DOMAIN_DISPLAY_CORE);
-- 
2.26.2