Xingchao, We have the drm_i915_display_funcs.write_eld() for such functionalities.
Thanks, Fengguang On Wed, Sep 05, 2012 at 01:06:16PM +0800, Wang Xingchao wrote: > ELD infomation should update immediately when detected HDMI hot plug event. > The related ELD_VALID bit should be set/clear to generate unsolicited event > to notify Alsa driver this change. > > Signed-off-by: Wang Xingchao <[email protected]> > --- > drivers/gpu/drm/i915/intel_hdmi.c | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c > b/drivers/gpu/drm/i915/intel_hdmi.c > index e4c37bb..1d9aaa9 100644 > --- a/drivers/gpu/drm/i915/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/intel_hdmi.c > @@ -719,6 +719,10 @@ intel_hdmi_detect(struct drm_connector *connector, bool > force) > struct drm_i915_private *dev_priv = connector->dev->dev_private; > struct edid *edid; > enum drm_connector_status status = connector_status_disconnected; > + enum drm_connector_status old_status = connector->status; > + int aud_cntrl_st2; > + uint32_t eldv; > + int i; > > if (IS_G4X(connector->dev) && !g4x_hdmi_connected(intel_hdmi)) > return status; > @@ -747,6 +751,30 @@ intel_hdmi_detect(struct drm_connector *connector, bool > force) > (intel_hdmi->force_audio == HDMI_AUDIO_ON); > } > > + if (status != old_status) { > + if (HAS_PCH_IBX(connector->dev)) > + aud_cntrl_st2 = IBX_AUD_CNTL_ST2; > + else if (IS_HASWELL(connector->dev)) > + aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD; > + else > + aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; > + > + eldv = (AUDIO_ELD_VALID_A | > + AUDIO_ELD_VALID_B | > + AUDIO_ELD_VALID_C) ; > + if (status == connector_status_connected) { > + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Pluged In\n", > connector->base.id, > + drm_get_connector_name(connector)); > + I915_WRITE(aud_cntrl_st2, eldv); > + } else { > + i = I915_READ(aud_cntrl_st2); > + i &= ~eldv; > + I915_WRITE(aud_cntrl_st2, i); > + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Pluged Out\n", > connector->base.id, > + drm_get_connector_name(connector)); > + } > + } > + > return status; > } > > -- > 1.7.9.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
