diff options
Diffstat (limited to 'kernels/linux-libre-aarch64/0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch')
| -rw-r--r-- | kernels/linux-libre-aarch64/0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/kernels/linux-libre-aarch64/0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch b/kernels/linux-libre-aarch64/0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch new file mode 100644 index 000000000..952bb8d55 --- /dev/null +++ b/kernels/linux-libre-aarch64/0010-drm-i915-Fix-audio-power-up-sequence-for-gen10-displ.patch @@ -0,0 +1,57 @@ +From 3a8fe5edd1f716667d7f1ebd4f06bc808bf89a6d Mon Sep 17 00:00:00 2001 +From: Kai Vehmanen <kai.vehmanen@linux.intel.com> +Date: Thu, 3 Oct 2019 11:55:30 +0300 +Subject: [PATCH 10/13] 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 <kai.vehmanen@linux.intel.com> +Signed-off-by: Jani Nikula <jani.nikula@intel.com> +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 + |