In glk when device boots with 1366x768 panel, HDA codec doesn't comeup. This result in no audio forever as cdclk is < 96Mhz. This chagne will ensure CD clock to be twice of BCLK.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102937 Signed-off-by: Abhay Kumar <abhay.ku...@intel.com> --- drivers/gpu/drm/i915/intel_audio.c | 34 +++++++++++++++++++++++----------- drivers/gpu/drm/i915/intel_cdclk.c | 21 +++++++++++++++++++++ drivers/gpu/drm/i915/intel_drv.h | 1 + 3 files changed, 45 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index 709d6ca68074..ca9859a69eb2 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -723,15 +723,38 @@ static void i915_audio_component_put_power(struct device *kdev) intel_display_power_put(kdev_to_i915(kdev), POWER_DOMAIN_AUDIO); } +/* Get CDCLK in kHz */ +static int i915_audio_component_get_cdclk_freq(struct device *kdev) +{ + struct drm_i915_private *dev_priv = kdev_to_i915(kdev); + + if (WARN_ON_ONCE(!HAS_DDI(dev_priv))) + return -ENODEV; + + return dev_priv->cdclk.hw.cdclk; +} + static void i915_audio_component_codec_wake_override(struct device *kdev, bool enable) { struct drm_i915_private *dev_priv = kdev_to_i915(kdev); u32 tmp; + int current_cdclk, min_cdclk; if (!IS_GEN9_BC(dev_priv)) return; + current_cdclk = i915_audio_component_get_cdclk_freq(kdev); + + /* + * Before probing for HDA Codec we need to make sure + * "The CD clock frequency must be at least twice + * the frequency of the Azalia BCLK." + */ + if (INTEL_GEN(dev_priv) >= 9 && current_cdclk <= 192000) { + intel_cdclk_bump(dev_priv); + } + i915_audio_component_get_power(kdev); /* @@ -753,17 +776,6 @@ static void i915_audio_component_codec_wake_override(struct device *kdev, i915_audio_component_put_power(kdev); } -/* Get CDCLK in kHz */ -static int i915_audio_component_get_cdclk_freq(struct device *kdev) -{ - struct drm_i915_private *dev_priv = kdev_to_i915(kdev); - - if (WARN_ON_ONCE(!HAS_DDI(dev_priv))) - return -ENODEV; - - return dev_priv->cdclk.hw.cdclk; -} - /* * get the intel_encoder according to the parameter port and pipe * intel_encoder is saved by the index of pipe diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c index dc7db8a2caf8..9426e1b7badc 100644 --- a/drivers/gpu/drm/i915/intel_cdclk.c +++ b/drivers/gpu/drm/i915/intel_cdclk.c @@ -1516,6 +1516,27 @@ void bxt_init_cdclk(struct drm_i915_private *dev_priv) } /** + * intel_cdclk_bump - Increase cdclk to 2* BCLK + * @dev_priv: i915 device + * + * Increase CDCLK for GKL and CNL. This is done only + * during HDA codec probe. + */ +void intel_cdclk_bump(struct drm_i915_private *dev_priv) +{ + struct intel_cdclk_state cdclk_state; + + cdclk_state = dev_priv->cdclk.hw; + + if (IS_GEMINILAKE(dev_priv)) { + cdclk_state.cdclk = glk_calc_cdclk((2*96000)); + cdclk_state.vco = glk_de_pll_vco(dev_priv, cdclk_state.cdclk); + cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); + bxt_set_cdclk(dev_priv, &cdclk_state); + } +} + +/** * bxt_uninit_cdclk - Uninitialize CDCLK on BXT * @dev_priv: i915 device * diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index d1452fd2a58d..5192753df3dc 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1417,6 +1417,7 @@ void skl_uninit_cdclk(struct drm_i915_private *dev_priv); void cnl_init_cdclk(struct drm_i915_private *dev_priv); void cnl_uninit_cdclk(struct drm_i915_private *dev_priv); void bxt_init_cdclk(struct drm_i915_private *dev_priv); +void intel_cdclk_bump(struct drm_i915_private *dev_priv); void bxt_uninit_cdclk(struct drm_i915_private *dev_priv); void icl_init_cdclk(struct drm_i915_private *dev_priv); void icl_uninit_cdclk(struct drm_i915_private *dev_priv); -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
