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

[Anshuman Gupta]

Gen12 hw are failing to enable lpsp configuration due to PG3 was left on
due to valid usgae count of POWER_DOMAIN_AUDIO.
It is not required to get POWER_DOMAIN_AUDIO ref-count when enabling
a crtc, it should be always i915_audio_component request to get/put
AUDIO_POWER_DOMAIN.

Cc: stable at vger.kernel.org
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 6c3b11de2daf..f31a579d7a52 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7356,7 +7356,11 @@ 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)
+	/*
+	 * Gen12 can drive lpsp on hdmi/dp outpus, it doesn't require to
+	 * enable AUDIO power in order to enable a crtc.
+	 */
+	if (INTEL_GEN(dev_priv) < 12 && HAS_DDI(dev_priv) && crtc_state->has_audio)
 		mask |= BIT_ULL(POWER_DOMAIN_AUDIO);
 
 	if (crtc_state->shared_dpll)
-- 
2.26.2