[Intel-gfx] [PATCH 2/2] drm/hdcp: DP HDCP2.2 errata LC_Send_L_Prime=16

Gupta, Anshuman anshuman.gupta at intel.com
Wed Mar 24 05:05:51 UTC 2021



> -----Original Message-----
> From: Nautiyal, Ankit K <ankit.k.nautiyal at intel.com>
> Sent: Wednesday, March 24, 2021 10:16 AM
> To: Gupta, Anshuman <anshuman.gupta at intel.com>; intel-
> gfx at lists.freedesktop.org
> Subject: Re: [Intel-gfx] [PATCH 2/2] drm/hdcp: DP HDCP2.2 errata
> LC_Send_L_Prime=16
> 
> Change is as per the errata. LGTM.
> 
> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Hi  Maarten ,
Could you please provide your Ack to merge it via drm-intel-next,  since it is a small change.
Thanks,
Anshuman Gupta.
> 
> On 1/27/2021 1:54 PM, Anshuman Gupta wrote:
> > Fix LC_Send_L_Prime message timeout to 16 as documented in DP HDCP 2.2
> > errata page 3.
> >
> > https://www.digital-cp.com/sites/default/files/HDCP%202_2_DisplayPort_
> > Errata_v3_0.pdf
> >
> > Cc: Ramalingam C <ramalingam.c at intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> > ---
> >   include/drm/drm_hdcp.h | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index
> > 2b165a0f434f..0b1111e3228e 100644
> > --- a/include/drm/drm_hdcp.h
> > +++ b/include/drm/drm_hdcp.h
> > @@ -231,7 +231,7 @@ struct hdcp2_rep_stream_ready {
> >   #define HDCP_2_2_PAIRING_TIMEOUT_MS		200
> >   #define HDCP_2_2_DP_PAIRING_READ_TIMEOUT_MS	5
> >   #define	HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS		20
> > -#define HDCP_2_2_DP_LPRIME_TIMEOUT_MS		7
> > +#define HDCP_2_2_DP_LPRIME_TIMEOUT_MS		16
> >   #define HDCP_2_2_RECVID_LIST_TIMEOUT_MS		3000
> >   #define HDCP_2_2_STREAM_READY_TIMEOUT_MS	100
> >


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