[Intel-gfx] [PATCH 1/2] drm/dp: Add defines for latency in sink

[vathsala nagaraju]

On Monday 25 September 2017 01:53 PM, Jani Nikula wrote:
> On Sat, 23 Sep 2017, vathsala nagaraju <vathsala.nagaraju at intel.com> wrote:
>> Add defines for dpcd register 2009 (synchronization latency
>> in sink).
>>
>> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> CC: Puthikorn Voravootivat <puthik at chromium.org>
>> Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju at intel.com>
>> ---
>>   include/drm/drm_dp_helper.h | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
>> index 11c39f1..846004e6 100644
>> --- a/include/drm/drm_dp_helper.h
>> +++ b/include/drm/drm_dp_helper.h
>> @@ -735,6 +735,9 @@
>>   # define DP_PSR_SINK_INTERNAL_ERROR         7
>>   # define DP_PSR_SINK_STATE_MASK             0x07
>>   
>> +#define DP_SINK_SYNCHRONIZATION_LATENCY	    0x2009
>> +# define DP_MAX_RESYNC_FRAME_CNT_MASK	    0xf
> For the DP spec, please don't invent the names, use the ones from the
> spec. At most drop excess stuff from the end.
In edp 1.4b spec , the register name 2009 is "DEBUG 0 SYNCHRONIZATION 
LATENCY SINK "  and bit 0:3 "MAX RE-SYNC FRAME COUNT"
>
> #define DP_SYNCHRONIZATION_LATENCY_IN_SINK
> # define DP_MAX_RESYNC_FRAME_COUNT_SHIFT
> # define DP_MAX_RESYNC_FRAME_COUNT_MASK
>
> And while at it, please add the full register contents.
>
> BR,
> Jani.
>
>> +
>>   #define DP_RECEIVER_ALPM_STATUS		    0x200b  /* eDP 1.4 */
>>   # define DP_ALPM_LOCK_TIMEOUT_ERROR	    (1 << 0)

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