[Intel-gfx] [PATCH 3/7] drm/i915: Disable infoframes when shutting down DDI HDMI

[Ville Syrjälä]

On Mon, Jun 13, 2016 at 03:36:19PM +0530, Sharma, Shashank wrote:
> Regards
> Shashank
> 
> On 6/3/2016 1:25 AM, ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > Disabling the video DIP when shutting the port down seems like a good
> > idea.
> >
> > Bspec says:
> > "When disabling both the DIP port and DIP transmission,
> >   first disable the port and then disable DIP."
> > and
> > "Restriction : GCP is only supported with HDMI when the bits per color is
> >   not equal to 8. GCP must be enabled prior to enabling TRANS_DDI_FUNC_CTL
> >   for HDMI with bits per color not equal to 8 and disabled after disabling
> >   TRANS_DDI_FUNC_CTL"
> >
> > So let's do it in the .post_disable() hook.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> >   drivers/gpu/drm/i915/intel_ddi.c | 6 ++++++
> >   1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > index 2fb28d310c22..6ff2a7b97ca6 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -1661,6 +1661,12 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
> >   	if (wait)
> >   		intel_wait_ddi_buf_idle(dev_priv, port);
> >
> > +	if (type == INTEL_OUTPUT_HDMI) {
> > +		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> > +
> > +		intel_hdmi->set_infoframes(encoder, false, NULL);
> I have seen an assert_hdmi_port_disabled in hsw_set_infoframes, it will 
> cause assert.

No. We've already turned off the port by this time.

> > +	}
> > +
> >   	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
> >   		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> >   		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
> >

-- 
Ville Syrjälä
Intel OTC