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a="2022596" X-IronPort-AV: E=Sophos;i="6.27,186,1787036400"; d="scan'208";a="2022596" Received: from fmviesa011.fm.intel.com ([10.60.135.151]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2026 03:41:03 -0700 X-CSE-ConnectionGUID: f8auXAckQHChf9XFPNJZtg== X-CSE-MsgGUID: wluOryQaRoGcAEOFWd+CcA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,186,1787036400"; d="scan'208";a="7230603" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.244.13]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2026 03:41:01 -0700 From: Jani Nikula To: Thorsten Leemhuis , Mitul Golani , intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, stable@vger.kernel.org, Linux kernel regressions list Subject: Re: [PATCH v1] drm/i915/display: Allow port sync on PTL In-Reply-To: <3918d7f2-2c8e-4c91-8de3-ae412acc75a0@leemhuis.info> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland References: <20261012040402.3332398-1-mitulkumar.ajitkumar.golani@intel.com> <3918d7f2-2c8e-4c91-8de3-ae412acc75a0@leemhuis.info> Date: Fri, 30 Oct 2026 12:40:59 +0200 Message-ID: <041969576ff0e2ef6abc03650e077e44669a2b72@intel.com> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain On Fri, 30 Oct 2026, Thorsten Leemhuis 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 >> --- >> 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