From nobody Sun Feb 8 23:03:41 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C6BE22489F for ; Thu, 24 Apr 2025 13:38:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745501906; cv=none; b=id0p1wuxQ/mlsRSSmz4ZS/4MWcQ+1seBFFwAnsxERFsl8skCv5zp7dSwxV485flpqBHHZSfouOg0XLTUkhQx83hfUSBSKEzHNYrjKhXVNysBJYIgmJlLBfI8yz9AWuOHw67tdHYf01URdew3rPkjSm+VCZS3TW90tLtUAIQWoHQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745501906; c=relaxed/simple; bh=lBZ2ULNOwanm8+4z0E89ucXzMn5Qz+pSLa83A9usEGo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hlahOKpMB2bGIRmuaterSW9bUnOtFm7Z+zFrT+scFUgeS6TBkdkGRW9qXqFJPQ0I7vWegmtY0RunksOAQSYRBIlWlnqlS4+bLioyT9fCrjgk5YQU4YDL0W9SAUWnTfxiAxRML1y3HfiJdPFUMjeFdtHd8BOYR5sGLcC6/frba3A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=KReb/Ycf; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="KReb/Ycf" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1745501905; x=1777037905; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lBZ2ULNOwanm8+4z0E89ucXzMn5Qz+pSLa83A9usEGo=; b=KReb/YcfHKSqcRxi7w3SWgdXTBrJikUHbFG084BGfR7zAW3bavoWk+OL 7KRsbGPpcEvPi0XeZgu9dZgq35RB54CGBAAy+96snEbAVIC8WS+ObHawn aa2X5vqSjLSv/MBczZurelg6f42idHpAlNyR3XeJCvjZyT0nvgGSFbhHl RqoCQm8dbQXCqmFnybwk/wEIPoGwYxDdGhYil4+kh1lqHeVH7biHm7pov umj6mLjl8Dczb9lzQp5t1UsPwT4BDB6Ey0o9NWx9qC59yhYZOLounqwQH 1fVvNW5jF6eIjxohjcSiTOrrF5NJ538/n4/bjkxscoZhGRTsamJTAsxey g==; X-CSE-ConnectionGUID: 4JVXXCFyTliZXaC0RwpAYw== X-CSE-MsgGUID: Ly+5WSJpS9qD3um4TAq/xQ== X-IronPort-AV: E=McAfee;i="6700,10204,11413"; a="46368166" X-IronPort-AV: E=Sophos;i="6.15,236,1739865600"; d="scan'208";a="46368166" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Apr 2025 06:38:25 -0700 X-CSE-ConnectionGUID: 8WyNjFFNR/eN9PDJg8S9RQ== X-CSE-MsgGUID: X3as6XM9RuGt5RFJgRLwtw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,236,1739865600"; d="scan'208";a="136701431" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Apr 2025 06:38:20 -0700 From: Alexander Usyskin To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Lucas De Marchi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Rodrigo Vivi , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , Karthik Poosa Cc: Reuven Abliyev , Oren Weil , linux-mtd@lists.infradead.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Alexander Usyskin Subject: [PATCH v9 09/12] drm/i915/nvm: add support for access mode Date: Thu, 24 Apr 2025 16:25:33 +0300 Message-ID: <20250424132536.3043825-10-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250424132536.3043825-1-alexander.usyskin@intel.com> References: <20250424132536.3043825-1-alexander.usyskin@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Check NVM access mode from GSC FW status registers and overwrite access status read from SPI descriptor, if needed. Reviewed-by: Rodrigo Vivi Acked-by: Rodrigo Vivi Signed-off-by: Alexander Usyskin --- drivers/gpu/drm/i915/intel_nvm.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_nvm.c b/drivers/gpu/drm/i915/intel_= nvm.c index 75d3ebe669ff..dd3999c934a7 100644 --- a/drivers/gpu/drm/i915/intel_nvm.c +++ b/drivers/gpu/drm/i915/intel_nvm.c @@ -10,6 +10,7 @@ #include "intel_nvm.h" =20 #define GEN12_GUNIT_NVM_SIZE 0x80 +#define HECI_FW_STATUS_2_NVM_ACCESS_MODE BIT(3) =20 static const struct intel_dg_nvm_region regions[INTEL_DG_NVM_REGIONS] =3D { [0] =3D { .name =3D "DESCRIPTOR", }, @@ -22,6 +23,28 @@ static void i915_nvm_release_dev(struct device *dev) { } =20 +static bool i915_nvm_writable_override(struct drm_i915_private *i915) +{ + resource_size_t base; + bool writable_override; + + if (IS_DG1(i915)) { + base =3D DG1_GSC_HECI2_BASE; + } else if (IS_DG2(i915)) { + base =3D DG2_GSC_HECI2_BASE; + } else { + drm_err(&i915->drm, "Unknown platform\n"); + return true; + } + + writable_override =3D + !(intel_uncore_read(&i915->uncore, HECI_FWSTS(base, 2)) & + HECI_FW_STATUS_2_NVM_ACCESS_MODE); + if (writable_override) + drm_info(&i915->drm, "NVM access overridden by jumper\n"); + return writable_override; +} + void intel_nvm_init(struct drm_i915_private *i915) { struct pci_dev *pdev =3D to_pci_dev(i915->drm.dev); @@ -43,7 +66,7 @@ void intel_nvm_init(struct drm_i915_private *i915) =20 nvm =3D i915->nvm; =20 - nvm->writeable_override =3D true; + nvm->writable_override =3D i915_nvm_writable_override(i915); nvm->bar.parent =3D &pdev->resource[0]; nvm->bar.start =3D GEN12_GUNIT_NVM_BASE + pdev->resource[0].start; nvm->bar.end =3D nvm->bar.start + GEN12_GUNIT_NVM_SIZE - 1; --=20 2.43.0