Re: [PATCH v3 7/8] drm/i915/vrr: Return from CMRR compute config in case of PSR2 enabled

["Borah, Chaitanya Kumar" <chaitanya.kumar.borah@intel.com>]

On 7/16/2026 5:59 PM, Golani, Mitulkumar Ajitkumar wrote:
> 
> 
>> -----Original Message-----
>> From: Borah, Chaitanya Kumar <chaitanya.kumar.borah@intel.com>
>> Sent: 15 July 2026 18:45
>> To: Golani, Mitulkumar Ajitkumar <mitulkumar.ajitkumar.golani@intel.com>;
>> intel-gfx@lists.freedesktop.org
>> Cc: intel-xe@lists.freedesktop.org; Shankar, Uma <uma.shankar@intel.com>;
>> Nautiyal, Ankit K <ankit.k.nautiyal@intel.com>
>> Subject: Re: [PATCH v3 7/8] drm/i915/vrr: Return from CMRR compute config
>> in case of PSR2 enabled
>>
>>
>>
>> On 7/14/2026 4:09 PM, Mitul Golani wrote:
>>> CMRR is mutually exclusive to PSR2, hence return from CMRR if PSR2 is
>>> already computed.
>>>
>>> Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
>>> ---
>>>    drivers/gpu/drm/i915/display/intel_vrr.c | 3 +++
>>>    1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c
>>> b/drivers/gpu/drm/i915/display/intel_vrr.c
>>> index 52fe40fdbdb3..ca3cac5aa6ab 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_vrr.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_vrr.c
>>> @@ -202,6 +202,9 @@ intel_vrr_cmrr_compute_config(struct
>> intel_crtc_state *crtc_state)
>>>    	if (!HAS_CMRR(display))
>>>    		return;
>>>
>>> +	if (crtc_state->has_sel_update)
>>> +		return;
>>> +
>>
>> This won't work because psr_compute_config happens after
>> vrr_compute_config.
>>
>> Also is this the best flag to identify PSR2?
> 
> AFAIK, this is the suitable flag to guard PSR2.
> 

crtc_state->has_sel_update is also set for Panel Replay.

So I think you would need something like

crtc_state->has_psr && crtc_state->has_sel_update &&
!crtc_state->has_panel_replay


Adding Jouni if he has something to add.


> thanks for pointing out the other problem which is actually a chicken and egg problem, I will look into it and address in the next revision
> 
> Thanks
> 
>>
>>>    	/* No CMRR ratio configured through debugfs */
>>>    	if (!crtc->force_cmrr.numerator)
>>>    		return;
>