[Intel-gfx] [PATCH v3 2/2] drm/i915: DP link training optimization

[Sivakumar Thulasimani]

On 4/28/2015 1:44 PM, Mika Kahola wrote:
> On Tue, 2015-04-28 at 13:19 +0530, Sivakumar Thulasimani wrote:
>> On 4/28/2015 12:13 PM, Mika Kahola wrote:
>>> This patch adds DP link training optimization by reusing the
>>> previously trained values.
>>>
>>> v2:
>>> - rebase
>>>
>>> V3:
>>> - rebase
>>>
>>> Signed-off-by: Mika Kahola <mika.kahola at intel.com>
>>> ---
>>>    drivers/gpu/drm/i915/intel_dp.c | 2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>>> index 15adafc..bb1a8d0 100644
>>> --- a/drivers/gpu/drm/i915/intel_dp.c
>>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>>> @@ -3794,7 +3794,7 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp)
>>>    	intel_dp->DP = DP;
>>>    
>>>    	if (channel_eq) {
>>> -		intel_dp->train_set_valid = is_edp(intel_dp);
>>> +		intel_dp->train_set_valid = true;
>>>    		DRM_DEBUG_KMS("Channel EQ done. DP Training successful\n");
>>>    	}
>>>    }
>> any reason why this is split into a separate patch ?
> I discussed this with Jani and we agreed that one option would be to
> apply this optimization only for the eDP case. This second patch is for
> the possibility to cover the general DP.
>
> -Mika-
>
>
might be a nit pick so up to you to consider this or not :). since DP is 
part of the second patch, better to reset "train_set_valid" for long 
pulse HPD in the second patch as well. HPD is not enabled for eDP as of now.

-- 
regards,
Sivakumar