Re: [PATCH 1/7] drm/i915: Remove duplicated dpcd write on hsw_psr_enable_sink.

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Em Qui, 2015-08-20 às 17:55 -0700, Rodrigo Vivi escreveu:
> This is wrong since my commit (89251b17). The intention of that
> commit was to remove this one here that is also wrong anyway,
> but it was forgotten.

You mentioned the current code is wrong, but it would be really nice if
you could describe why it is wrong and what are the implications of it
being wrong. Was this causing some specific problem or was it just
found by code inspection? In case it was found just by code inspection,
you could try to elaborate on the possible problems brought by the bad
commit.

A more elaborate description helps not only the reviewers, but also the
possible backporters and even helps us judging whether it should be
merged by Daniel or Jani.

Anyway, as far as I see the patch looks correct, so if you could
provide another paragraph for Daniel to amend on the commit message:
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>

> 
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/intel_psr.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_psr.c 
> b/drivers/gpu/drm/i915/intel_psr.c
> index a04b4dc..51f0514 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -170,9 +170,6 @@ static void hsw_psr_enable_sink(struct intel_dp 
> *intel_dp)
>  
>  	aux_clock_divider = intel_dp
> ->get_aux_clock_divider(intel_dp, 0);
>  
> -	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
> -			   DP_PSR_ENABLE & 
> ~DP_PSR_MAIN_LINK_ACTIVE);
> -
>  	/* Enable AUX frame sync at sink */
>  	if (dev_priv->psr.aux_frame_sync)
>  		drm_dp_dpcd_writeb(&intel_dp->aux,
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