drm/i915: start adding dp mst audio

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.

Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Libin Yang <libin.yang@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1449036584-105393-2-git-send-email-libin.yang@linux.intel.com

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a8721fc..8698bd5 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2850,6 +2850,20 @@ 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)
 {
@@ -2893,6 +2907,8 @@ static void intel_connector_info(struct seq_file *m,
                        intel_hdmi_info(m, intel_connector);
                else if (intel_encoder->type == INTEL_OUTPUT_LVDS)
                        intel_lvds_info(m, intel_connector);
+               else if (intel_encoder->type == INTEL_OUTPUT_DP_MST)
+                       intel_dp_mst_info(m, intel_connector);
        }
 
        seq_printf(m, "\tmodes:\n");

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 9aa83e7..5ad2e66 100644 (file)
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -262,7 +262,8 @@ static void hsw_audio_codec_disable(struct intel_encoder *encoder)
        tmp |= AUD_CONFIG_N_PROG_ENABLE;
        tmp &= ~AUD_CONFIG_UPPER_N_MASK;
        tmp &= ~AUD_CONFIG_LOWER_N_MASK;
-       if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
+       if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT) ||
+           intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DP_MST))
                tmp |= AUD_CONFIG_N_VALUE_INDEX;
        I915_WRITE(HSW_AUD_CFG(pipe), tmp);
 
@@ -474,7 +475,8 @@ static void ilk_audio_codec_enable(struct drm_connector *connector,
        tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
        tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
        tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
-       if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
+       if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT) ||
+           intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DP_MST))
                tmp |= AUD_CONFIG_N_VALUE_INDEX;
        else
                tmp |= audio_config_hdmi_pixel_clock(adjusted_mode);
@@ -512,7 +514,8 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
 
        /* ELD Conn_Type */
        connector->eld[5] &= ~(3 << 2);
-       if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
+       if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
+           intel_pipe_has_type(crtc, INTEL_OUTPUT_DP_MST))
                connector->eld[5] |= (1 << 2);
 
        connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 1fad19e..f00a3c9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3114,6 +3114,19 @@ 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)
 {
@@ -3174,11 +3187,8 @@ 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 8c4e7df..8b608c2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -78,6 +78,8 @@ 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;
@@ -102,6 +104,11 @@ 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);
@@ -112,6 +119,10 @@ 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)
@@ -208,6 +219,7 @@ 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 = dev->dev_private;
+       struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
        enum port port = intel_dig_port->port;
        int ret;
 
@@ -220,6 +232,13 @@ 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(crtc->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 +264,9 @@ static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 
        pipe_config->has_dp_encoder = true;
 
+       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 974ab04..f97b21d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1014,6 +1014,8 @@ 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 *