Re: [v1 0/6] Enable HDR on MCA LSPCON based Gen9 devices

Shankar, Uma
2019-10-16T14:21:35Z

>-----Original Message-----
>From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>Sent: Wednesday, October 16, 2019 6:48 PM
>To: Shankar, Uma <uma.shankar@intel.com>
>Cc: intel-gfx@lists.freedesktop.org; Mun, Gwan-gyeong <gwan-
>gyeong.mun@intel.com>; Sharma, Shashank <shashank.sharma@intel.com>
>Subject: Re: [v1 0/6] Enable HDR on MCA LSPCON based Gen9 devices
>
>On Wed, Oct 16, 2019 at 04:02:43PM +0530, Uma Shankar wrote:
>> Gen9 hardware supports HDMI2.0 through LSPCON chips. Extending HDR
>> support for MCA LSPCON based GEN9 devices.
>
>Couple of general comments about the LSPCON stuff.
>
>a) we need infoframe readout support

We lack that in general for all the DP SDP stuff. Discussed with GG
and hopefully he has plans for DP state readout.

>b) we need to stop sending infoframes to DVI sinks

Sure, will work on this.

>c) we need to figure out how to disable the AVI infoframe
> once enabled (if it doesn't get automagically disabled
> when do a modeset), because otherwise when we switch
> displays from HDMI to DVI we will still send the infoframe
> to the DVI sink

Ok, will work on to handle this.

>I think those should be fixed first before we add more infoframes to the mix.
>
>Also if we use the SDP stuff for the HDR infoframe we should just integrate it properly
>with the already existing DP HDR metadata stuff. And we need to add readout support
>for that.

Sure, will discuss with GG to get the state readout for DP SDP.

>--
>Ville Syrjälä
>Intel