Re: [PATCH v1] drm/i915/display: Allow port sync on PTL

[Jani Nikula <jani.nikula@linux.intel.com>]

On Fri, 30 Oct 2026, Thorsten Leemhuis <regressions@leemhuis.info> wrote:
> On 10/12/26 06:04, Mitul Golani wrote:
>> Some dual-SST tiled displays exhibit visual corruption on PTL, with
>> one tile's image vertically shifted or wrapped by a random amount
>> that changes on every hotplug.
>> 
>> PTL supports port sync, so allow it to be used to avoid these
>> display issues.
>
> Is this fix for a recent regression still in the "to review" list of
> anyone, or did it fell through the cracks? Or was this solved meanwhile
> and I just missed it?

Pushed now, thanks for the reminder.

BR,
Jani.

>
> Ciao, Thorsten
>
>> Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/8991
>> Fixes: 05cffc074938 ("drm/i915/display: Implement Wa_16024710867")
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
>> ---
>>  drivers/gpu/drm/i915/display/intel_ddi.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
>> index a46ab5d3d70f..a0aff087fafa 100644
>> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
>> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
>> @@ -4629,7 +4629,7 @@ intel_ddi_port_sync_transcoders(const struct intel_crtc_state *ref_crtc_state,
>>  	 * From, xe3lpd onwards we have defeatured this with reference to
>>  	 * Wa_16024710867
>>  	 */
>> -	if (!IS_DISPLAY_VER(display, 9, 20))
>> +	if (!IS_DISPLAY_VER(display, 9, 30))
>>  		return 0;
>>  
>>  	if (!intel_crtc_has_type(ref_crtc_state, INTEL_OUTPUT_DP))
>

-- 
Jani Nikula, Intel