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

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Message-Id: <20250418060006.807216-1-liujiajia@kylinos.cn>
Date: Fri, 18 Apr 2025 14:00:06 +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] 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].

[3.490423] i915 0000:00:02.0: [drm] Found coffeelake (device ID 3e92) integrated display version 9.00 stepping N/A
[3.507160] ------------[ cut here ]------------
[3.523341] i915 0000:00:02.0: [drm] drm_WARN_ON(!IS_PLATFORM(dev_priv, INTEL_SKYLAKE) && !IS_PLATFORM(dev_priv, INTEL_KABYLAKE))
[3.523356] WARNING: CPU: 5 PID: 199 at drivers/gpu/drm/i915/soc/intel_pch.c:92 intel_pch_type+0x1c3/0xe10 [i915]
[3.709685] CPU: 5 UID: 0 PID: 199 Comm: systemd-udevd Not tainted 6.15.0-rc2-up-fc96b232f8e7 #1 PREEMPT(voluntary)

Signed-off-by: Jiajia Liu <liujiajia@...inos.cn>
---
 drivers/gpu/drm/i915/soc/intel_pch.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/soc/intel_pch.c b/drivers/gpu/drm/i915/soc/intel_pch.c
index 82dc7fbd1a3e..011bc9757e9b 100644
--- a/drivers/gpu/drm/i915/soc/intel_pch.c
+++ b/drivers/gpu/drm/i915/soc/intel_pch.c
@@ -90,7 +90,8 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
 	case INTEL_PCH_SPT_DEVICE_ID_TYPE:
 		drm_dbg_kms(&dev_priv->drm, "Found SunrisePoint PCH\n");
 		drm_WARN_ON(&dev_priv->drm,
-			    !IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
+			    !IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv) &&
+			    !IS_COFFEELAKE(dev_priv));
 		return PCH_SPT;
 	case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
 		drm_dbg_kms(&dev_priv->drm, "Found SunrisePoint LP PCH\n");
-- 
2.25.1