From 763a3bbf9ded9e8e0225ba25ab48a65f8e380517 Mon Sep 17 00:00:00 2001 From: Kai Vehmanen Date: Thu, 3 Oct 2019 11:55:30 +0300 Subject: [PATCH 10/15] drm/i915: Fix audio power up sequence for gen10+ display On platfroms with gen10+ display, driver must set the enable bit of AUDIO_PIN_BUF_CTL register before transactions with the HDA controller can proceed. Add setting this bit to the audio power up sequence. Failing to do this resulted in errors during display audio codec probe, and failures during resume from suspend. Note: We may also need to disable the bit afterwards, but there are still unresolved issues with that. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111214 Signed-off-by: Kai Vehmanen Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20191003085531.30990-1-kai.vehmanen@linux.intel.com --- drivers/gpu/drm/i915/display/intel_audio.c | 5 +++++ drivers/gpu/drm/i915/i915_reg.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c index 439bc0a93410..440b33762fef 100644 --- a/drivers/gpu/drm/i915/display/intel_audio.c +++ b/drivers/gpu/drm/i915/display/intel_audio.c @@ -860,6 +860,11 @@ static unsigned long i915_audio_component_get_power(struct device *kdev) /* Force CDCLK to 2*BCLK as long as we need audio powered. */ if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) glk_force_audio_cdclk(dev_priv, true); + + if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) + I915_WRITE(AUD_PIN_BUF_CTL, + (I915_READ(AUD_PIN_BUF_CTL) | + AUD_PIN_BUF_ENABLE)); } return ret; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e1fe356463ec..ccfea9c2b8bf 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9105,6 +9105,8 @@ enum { #define SKL_AUD_CODEC_WAKE_SIGNAL (1 << 15) #define AUD_FREQ_CNTRL _MMIO(0x65900) +#define AUD_PIN_BUF_CTL _MMIO(0x48414) +#define AUD_PIN_BUF_ENABLE REG_BIT(31) /* * HSW - ICL power wells -- 2.24.1