Re: [PATCH v3 4/4] drm_dp_cec: add MST support

2021-02-04 Thread Sam McNally
On Thu, 4 Feb 2021 at 21:42, Hans Verkuil wrote: > > On 23/09/2020 04:13, 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

Re: [PATCH v3 4/4] drm_dp_cec: add MST support

2021-02-04 Thread Hans Verkuil
On 23/09/2020 04:13, 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

[PATCH v3 4/4] drm_dp_cec: add MST support

2020-09-22 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