Re: [PATCH 5/5] drm_dp_cec: add the implementation of MST support

2020-09-09 Thread Sam McNally
On Tue, 8 Sep 2020 at 18:08, Hans Verkuil wrote: > > Hi Sam, > > On 01/09/2020 08:22, Sam McNally wrote: > > With DP v2.0 errata E5, CEC tunneling can be supported through an MST > > topology. > > Oh wow, this is finally supported in the spec. Very nice to see this. > Also very nice to see that

Re: [PATCH 5/5] drm_dp_cec: add the implementation of MST support

2020-09-08 Thread Hans Verkuil
On 01/09/2020 08:22, Sam McNally wrote: > With DP v2.0 errata E5, CEC tunneling can be supported through an MST > topology. > > There are some minor differences for CEC tunneling through an MST > topology compared to CEC tunneling to an SST port: > - CEC IRQs are delivered via a sink event notify

Re: [PATCH 5/5] drm_dp_cec: add the implementation of MST support

2020-09-08 Thread Hans Verkuil
Hi Sam, On 01/09/2020 08:22, Sam McNally wrote: > With DP v2.0 errata E5, CEC tunneling can be supported through an MST > topology. Oh wow, this is finally supported in the spec. Very nice to see this. Also very nice to see that my old experimental patches attempting to support CEC on MST didn't

[PATCH 5/5] drm_dp_cec: add the implementation of MST support

2020-09-01 Thread Sam McNally
With DP v2.0 errata E5, CEC tunneling can be supported through an MST topology. There are some minor differences for CEC tunneling through an MST topology compared to CEC tunneling to an SST port: - CEC IRQs are delivered via a sink event notify message - CEC-related DPCD registers are accessed