Re: [PATCH 1/3] drm/i915: start adding dp mst audio

["Yang, Libin" <libin.yang@intel.com>]

Add Takashi

Regards,
Libin


> -----Original Message-----
> From: Pandiyan, Dhinakaran
> Sent: Wednesday, August 3, 2016 9:47 AM
> To: intel-gfx@lists.freedesktop.org
> Cc: cpaul@redhat.com; ville.syrjala@linux.intel.com; Yang, Libin
> <libin.yang@intel.com>; Libin Yang <libin.yang@linux.intel.com>
> Subject: [PATCH 1/3] drm/i915: start adding dp mst audio
> 
> From: Libin Yang <libin.yang@linux.intel.com>
> 
> (This patch is developed by Dave Airlie <airlied@redhat.com> originally)
> 
> This patch adds support for DP MST audio in i915.
> 
> Enable audio codec when DP MST is enabled if has_audio flag is set.
> Disable audio codec when DP MST is disabled if has_audio flag is set.
> 
> Another separated patches to support DP MST audio will be implemented in
> audio driver.
> 
> Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 19 ++++++++++++++++++-
>  drivers/gpu/drm/i915/intel_ddi.c    | 20 +++++++++++++++-----
>  drivers/gpu/drm/i915/intel_dp_mst.c | 21 +++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h    |  2 ++
>  4 files changed, 56 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 531ca02..56e38b1 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2961,6 +2961,20 @@ static void intel_dp_info(struct seq_file *m,
>  		intel_panel_info(m, &intel_connector->panel);  }
> 
> +static void intel_dp_mst_info(struct seq_file *m,
> +			  struct intel_connector *intel_connector) {
> +	struct intel_encoder *intel_encoder = intel_connector->encoder;
> +	struct intel_dp_mst_encoder *intel_mst =
> +		enc_to_mst(&intel_encoder->base);
> +	struct intel_digital_port *intel_dig_port = intel_mst->primary;
> +	struct intel_dp *intel_dp = &intel_dig_port->dp;
> +	bool has_audio = drm_dp_mst_port_has_audio(&intel_dp->mst_mgr,
> +					intel_connector->port);
> +
> +	seq_printf(m, "\taudio support: %s\n", yesno(has_audio)); }
> +
>  static void intel_hdmi_info(struct seq_file *m,
>  			    struct intel_connector *intel_connector)  { @@ -
> 3003,7 +3017,10 @@ static void intel_connector_info(struct seq_file *m,
>  	switch (connector->connector_type) {
>  	case DRM_MODE_CONNECTOR_DisplayPort:
>  	case DRM_MODE_CONNECTOR_eDP:
> -		intel_dp_info(m, intel_connector);
> +		if (intel_encoder->type == INTEL_OUTPUT_DP_MST)
> +			intel_dp_mst_info(m, intel_connector);
> +		else
> +			intel_dp_info(m, intel_connector);
>  		break;
>  	case DRM_MODE_CONNECTOR_LVDS:
>  		if (intel_encoder->type == INTEL_OUTPUT_LVDS) diff --git
> a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index dd1d6fe..cbb4e7a 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -2154,6 +2154,19 @@ void intel_ddi_fdi_disable(struct drm_crtc *crtc)
>  	I915_WRITE(FDI_RX_CTL(PIPE_A), val);
>  }
> 
> +bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
> +				 struct intel_crtc *intel_crtc)
> +{
> +	u32 temp;
> +
> +	if (intel_display_power_is_enabled(dev_priv,
> POWER_DOMAIN_AUDIO)) {
> +		temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> +		if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
> +			return true;
> +	}
> +	return false;
> +}
> +
>  void intel_ddi_get_config(struct intel_encoder *encoder,
>  			  struct intel_crtc_state *pipe_config)  { @@ -2219,11
> +2232,8 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
>  		break;
>  	}
> 
> -	if (intel_display_power_is_enabled(dev_priv,
> POWER_DOMAIN_AUDIO)) {
> -		temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> -		if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
> -			pipe_config->has_audio = true;
> -	}
> +	pipe_config->has_audio =
> +		intel_ddi_is_audio_enabled(dev_priv, intel_crtc);
> 
>  	if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp
> &&
>  	    pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) { diff --git
> a/drivers/gpu/drm/i915/intel_dp_mst.c
> b/drivers/gpu/drm/i915/intel_dp_mst.c
> index 68a005d..84dbb50 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -76,6 +76,8 @@ static bool intel_dp_mst_compute_config(struct
> intel_encoder *encoder,
>  		return false;
>  	}
> 
> +	if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, found->port))
> +		pipe_config->has_audio = true;
>  	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
> 
>  	pipe_config->pbn = mst_pbn;
> @@ -97,6 +99,10 @@ static void intel_mst_disable_dp(struct intel_encoder
> *encoder)
>  	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder-
> >base);
>  	struct intel_digital_port *intel_dig_port = intel_mst->primary;
>  	struct intel_dp *intel_dp = &intel_dig_port->dp;
> +	struct drm_device *dev = encoder->base.dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct drm_crtc *crtc = encoder->base.crtc;
> +	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>  	int ret;
> 
>  	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); @@ -107,6
> +113,10 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder)
>  	if (ret) {
>  		DRM_ERROR("failed to update payload %d\n", ret);
>  	}
> +	if (intel_crtc->config->has_audio) {
> +		intel_audio_codec_disable(encoder);
> +		intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
> +	}
>  }
> 
>  static void intel_mst_post_disable_dp(struct intel_encoder *encoder) @@ -
> 207,7 +217,9 @@ static void intel_mst_enable_dp(struct intel_encoder
> *encoder)
>  	struct intel_dp *intel_dp = &intel_dig_port->dp;
>  	struct drm_device *dev = intel_dig_port->base.base.dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
> +	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
>  	enum port port = intel_dig_port->port;
> +	enum pipe pipe = crtc->pipe;
>  	int ret;
> 
>  	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); @@ -222,6
> +234,12 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder)
>  	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
> 
>  	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
> +	if (crtc->config->has_audio) {
> +		DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
> +				 pipe_name(pipe));
> +		intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
> +		intel_audio_codec_enable(encoder);
> +	}
>  }
> 
>  static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
> @@ -245,6 +263,9 @@ static void intel_dp_mst_enc_get_config(struct
> intel_encoder *encoder,
>  	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
>  	u32 temp, flags = 0;
> 
> +	pipe_config->has_audio =
> +		intel_ddi_is_audio_enabled(dev_priv, crtc);
> +
>  	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
>  	if (temp & TRANS_DDI_PHSYNC)
>  		flags |= DRM_MODE_FLAG_PHSYNC;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index e74d851..f73de63c 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1123,6 +1123,8 @@ void intel_ddi_set_pipe_settings(struct drm_crtc
> *crtc);  void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp);  bool
> intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);
> void intel_ddi_fdi_disable(struct drm_crtc *crtc);
> +bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
> +				 struct intel_crtc *intel_crtc);
>  void intel_ddi_get_config(struct intel_encoder *encoder,
>  			  struct intel_crtc_state *pipe_config);  struct
> intel_encoder *
> --
> 2.5.0

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