From nobody Tue Feb 10 19:48:02 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 188661E32CB for ; Wed, 1 Jan 2025 15:51:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735746686; cv=none; b=R6zxNc7luQd/dn4xVzkzruIDQyjiyLWDsE2eBvlLaLSr5sX8+gAsik9xYfJydptbiRg/w6AWgpVn7DcFF0qg2LMPSWWO3b7A9ZaeJbX404TOcluj27yRBmEQ2Fk7U480fxQYmpz018t+U+DMFCTyDDekzkm03pTIHVFQrIisedI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735746686; c=relaxed/simple; bh=8st0GcF0LWZ1MQQer5WMDLRIdMrYVYWR9wmuvEfF6mw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b2dIbs6z1Yi9ztBbS1o3LKKYClp7Hf8ZV/n8JpUQd41xSMrVVK9Djik/K3HZ+wXm4ZsANO9MPuw2/7Z/euF6gdZor+FtX2L6lRKcVXbHXhgTSdIOUbsUgx+Oqqf+UqGJZzSySOCe5Ta/oZ3W+CZnBWxFl0o7ZVjTioJvVmJUjCE= 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=KJxbV5fi; arc=none smtp.client-ip=198.175.65.11 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="KJxbV5fi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1735746685; x=1767282685; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8st0GcF0LWZ1MQQer5WMDLRIdMrYVYWR9wmuvEfF6mw=; b=KJxbV5fi0fOMMhjM5lYbHMuBWp72FyxyFDeTjzx56BQ6bxYqgkmma7qQ wqRk4C5gmsOlZtW77P6CcdN47yFwKkXOZ72wZHhxH9lP6Ov5QdyO8Tuz1 Ub3QSarrB2jx0ppPh0ugs7oT7TNNEnoFb4TJrlLvuvGiTJ0iATht5M1Jg ajrDn8rwOy8vZ7oEBF0QPVA+iGclGPhBsV9uD9dBUD9ZWnNyHCIZ6RVzG N7rPxFYbfHosyCcN5fIKHEWnsn0o7WUal8inJ6B/jqpSgFf2u7K7D2m5B pUJUp9hsG0E/v8a+NSbmgF04rSlXx/PMq6yA17hJajbQB66w2zfkZvaK2 w==; X-CSE-ConnectionGUID: /qeEPngTRwKI04D2dUvpxA== X-CSE-MsgGUID: MafTpyf1SeujaSajyNy0+w== X-IronPort-AV: E=McAfee;i="6700,10204,11302"; a="46485656" X-IronPort-AV: E=Sophos;i="6.12,282,1728975600"; d="scan'208";a="46485656" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jan 2025 07:51:25 -0800 X-CSE-ConnectionGUID: 8I4JaYNVQg2ghCdFC6h4/w== X-CSE-MsgGUID: hwq2uM5HRmGA+S+Vs0/98w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,282,1728975600"; d="scan'208";a="132139016" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jan 2025 07:51:20 -0800 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, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Alexander Usyskin Subject: [PATCH v4 09/11] drm/i915/nvm: add support for access mode Date: Wed, 1 Jan 2025 17:39:23 +0200 Message-ID: <20250101153925.865703-10-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250101153925.865703-1-alexander.usyskin@intel.com> References: <20250101153925.865703-1-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 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..d88f8b9b5ace 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_writeable_override(struct drm_i915_private *i915) +{ + resource_size_t base; + bool writeable_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; + } + + writeable_override =3D + !(intel_uncore_read(&i915->uncore, HECI_FWSTS(base, 2)) & + HECI_FW_STATUS_2_NVM_ACCESS_MODE); + if (writeable_override) + drm_info(&i915->drm, "NVM access overridden by jumper\n"); + return writeable_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->writeable_override =3D i915_nvm_writeable_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