linux-kernel - [PATCH RESEND] drm/i915/pch: fix warning for coffeelake on SunrisePoint PCH

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Message-Id: <20250423073730.585181-1-liujiajia@kylinos.cn>
Date: Wed, 23 Apr 2025 15:37:30 +0800
From: Jiajia Liu <liujiajia@...inos.cn>
To: Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Nemesa Garg <nemesa.garg@...el.com>,
	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Nitin Gote <nitin.r.gote@...el.com>,
	Matt Roper <matthew.d.roper@...el.com>,
	intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: Jiajia Liu <liujiajia@...inos.cn>
Subject: [PATCH RESEND] drm/i915/pch: fix warning for coffeelake on SunrisePoint PCH

i915/pch reports a warning on a mini PC which has a CoffeeLake-S GT2
[UHD Graphics 630] [8086:3e92] and an ISA bridge - H110 LPC Controller
[8086:a143].

[5.608723] i915 0000:00:02.0: [drm] Found coffeelake (device ID 3e92) integrated display version 9.00 stepping N/A
[5.608969] ------------[ cut here ]------------
[5.608972] i915 0000:00:02.0: [drm] drm_WARN_ON(!display->platform.skylake && !display->platform.kabylake)
[5.608995] WARNING: CPU: 3 PID: 440 at drivers/gpu/drm/i915/display/intel_pch.c:126 intel_pch_type+0x1af/0xae0 [i915]
[5.609317] CPU: 3 UID: 0 PID: 440 Comm: (udev-worker) Not tainted 6.15.0-rc3-drm-tip-2fa6469c618d #3 PREEMPT(voluntary)

Signed-off-by: Jiajia Liu <liujiajia@...inos.cn>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
---
 drivers/gpu/drm/i915/display/intel_pch.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_pch.c b/drivers/gpu/drm/i915/display/intel_pch.c
index 5035b63a4889..469e8a3cfb49 100644
--- a/drivers/gpu/drm/i915/display/intel_pch.c
+++ b/drivers/gpu/drm/i915/display/intel_pch.c
@@ -125,7 +125,8 @@ intel_pch_type(const struct intel_display *display, unsigned short id)
 		drm_dbg_kms(display->drm, "Found SunrisePoint PCH\n");
 		drm_WARN_ON(display->drm,
 			    !display->platform.skylake &&
-			    !display->platform.kabylake);
+			    !display->platform.kabylake &&
+			    !display->platform.coffeelake);
 		return PCH_SPT;
 	case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
 		drm_dbg_kms(display->drm, "Found SunrisePoint LP PCH\n");
-- 
2.25.1