Re: [PATCH] drm/dp: Avoid Reading DPCD_REV Before Native Aux Read

Reviewed-by: Lyude Paul On Wed, 2022-08-31 at 18:13 -0400, Fangzhi Zuo wrote: > The attempt to read DPCD_REV before any native aux read breaks > majority of DP2 compliance. > > The spec. requires DP_SINK_STATUS to be polled for the reset status > DP_INTRA_HOP_AUX_REPLY_INDICATION during the

[PATCH] drm/dp: Avoid Reading DPCD_REV Before Native Aux Read

The attempt to read DPCD_REV before any native aux read breaks majority of DP2 compliance. The spec. requires DP_SINK_STATUS to be polled for the reset status DP_INTRA_HOP_AUX_REPLY_INDICATION during the clear training stage. Polling DP_SINK_STATUS each time gets DPCD_REV read first that makes