Re: [PATCH] drm/i915/display: Drop redundant debug print

["Sharma, Swati2" <swati2.sharma@intel.com>]

On 16-Aug-21 5:40 PM, Jani Nikula wrote:
> On Mon, 16 Aug 2021, "Sharma, Swati2" <swati2.sharma@intel.com> wrote:
>> On 13-Aug-21 1:16 PM, Jani Nikula wrote:
>>> On Thu, 12 Aug 2021, Swati Sharma <swati2.sharma@intel.com> wrote:
>>>> drm_dp_dpcd_read/write already has debug error message.
>>>> Drop redundant error messages which gives false
>>>> status even if correct value is read in drm_dp_dpcd_read().
>>>
>>> I guess the only problem is it gets harder to associate the preceding
>>> low level error messages with intel_dp_check_link_service_irq(). *shrug*
>>>
>>> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
>>>
>>>
>> Thanks Jani for the review. Can you please merge?
> 
> There was another version with open review?

Yes. https://patchwork.freedesktop.org/series/93025/#rev3
Should I add debug prints how Imre suggested in other IRQ func
to make it generic or should it be dropped from here too?
Quoting imre
"Yes, that's why I suggested to return for the '0 value read' case 
without any message printed, but still keep the message for the case 
when the drm_dp_dpcd_readb() fails."
"Ok, it's good to keep them in sync at least, so I'm ok with removing 
the debug messages from here too."

Please let me know what is the better approach.
> 
> BR,
> Jani.
> 
> 
>>
>>>>
>>>> Fixes: 9488a030ac91 ("drm/i915: Add support for enabling link status and recovery")
>>>> Cc: Swati Sharma <swati2.sharma@intel.com>
>>>> Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
>>>> Cc: Uma Shankar <uma.shankar@intel.com> (v2)
>>>> Cc: Jani Nikula <jani.nikula@intel.com>
>>>> Cc: "Ville Syrj_l_" <ville.syrjala@linux.intel.com>
>>>> Cc: Imre Deak <imre.deak@intel.com>
>>>> Cc: Manasi Navare <manasi.d.navare@intel.com>
>>>> Cc: Uma Shankar <uma.shankar@intel.com>
>>>> Cc: "Jos_ Roberto de Souza" <jose.souza@intel.com>
>>>> Cc: Sean Paul <seanpaul@chromium.org>
>>>> Cc: <stable@vger.kernel.org> # v5.12+
>>>>
>>>> Link: https://patchwork.freedesktop.org/patch/msgid/20201218103723.30844-12-ankit.k.nautiyal@intel.com
>>>> Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
>>>> ---
>>>>    drivers/gpu/drm/i915/display/intel_dp.c | 8 ++------
>>>>    1 file changed, 2 insertions(+), 6 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
>>>> index c386ef8eb200..5c84f51ad41d 100644
>>>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>>>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>>>> @@ -3871,16 +3871,12 @@ static void intel_dp_check_link_service_irq(struct intel_dp *intel_dp)
>>>>    		return;
>>>>    
>>>>    	if (drm_dp_dpcd_readb(&intel_dp->aux,
>>>> -			      DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val) {
>>>> -		drm_dbg_kms(&i915->drm, "Error in reading link service irq vector\n");
>>>> +			      DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val)
>>>>    		return;
>>>> -	}
>>>>    
>>>>    	if (drm_dp_dpcd_writeb(&intel_dp->aux,
>>>> -			       DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1) {
>>>> -		drm_dbg_kms(&i915->drm, "Error in writing link service irq vector\n");
>>>> +			       DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1)
>>>>    		return;
>>>> -	}
>>>>    
>>>>    	if (val & HDMI_LINK_STATUS_CHANGED)
>>>>    		intel_dp_handle_hdmi_link_status_change(intel_dp);
>>>
> 

-- 
~Swati Sharma