From patchwork Mon Apr 12 09:05:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Matthew Auld X-Patchwork-Id: 12197257 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 844BBC433B4 for ; Mon, 12 Apr 2021 09:09:58 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 512186109E for ; Mon, 12 Apr 2021 09:09:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 512186109E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9CA086E3AA; Mon, 12 Apr 2021 09:09:42 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 92C2D6E2ED; Mon, 12 Apr 2021 09:09:40 +0000 (UTC) IronPort-SDR: 4edQMXX1su9XPu3WzHxkGq+diloNp81uClyR2jdHYdkIo1mSuHwaP93/zpgYnBooPr4TiJ9pwn wR5VLITHMr5Q== X-IronPort-AV: E=McAfee;i="6000,8403,9951"; a="193709744" X-IronPort-AV: E=Sophos;i="5.82,216,1613462400"; d="scan'208";a="193709744" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2021 02:09:40 -0700 IronPort-SDR: pRrLIw4/E2Q9/K5Um5lWo3bOfHejBQ4C4QZZBU21PbG/c4H2hA3lOG7kETBLWsp+vaC+1UUQrJ h2dgmW1HPjMQ== X-IronPort-AV: E=Sophos;i="5.82,216,1613462400"; d="scan'208";a="423712741" Received: from tarynrox-mobl1.ger.corp.intel.com (HELO mwauld-desk1.ger.corp.intel.com) ([10.252.5.30]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2021 02:09:38 -0700 From: Matthew Auld To: intel-gfx@lists.freedesktop.org Subject: [PATCH 13/19] drm/i915/dg1: Read OPROM via SPI controller Date: Mon, 12 Apr 2021 10:05:20 +0100 Message-Id: <20210412090526.30547-14-matthew.auld@intel.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210412090526.30547-1-matthew.auld@intel.com> References: <20210412090526.30547-1-matthew.auld@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jani Nikula , Lucas De Marchi , dri-devel@lists.freedesktop.org, Jon Bloomfield , Tomas Winkler Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Clint Taylor Read OPROM SPI through MMIO and find VBT entry since we can't use OpRegion and PCI mapping may not work on some systems due to the BIOS not leaving the Option ROM mapped. v2 by Jani: - switch to intel_uncore_read/intel_uncore_write Cc: Ville Syrjälä Cc: Tomas Winkler Cc: Jon Bloomfield Signed-off-by: Clint Taylor Signed-off-by: Lucas De Marchi Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_bios.c | 80 +++++++++++++++++++++-- drivers/gpu/drm/i915/i915_reg.h | 8 +++ 2 files changed, 82 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index ea4837d485a1..f9dc651f1652 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2238,6 +2238,66 @@ bool intel_bios_is_valid_vbt(const void *buf, size_t size) return vbt; } +static struct vbt_header *spi_oprom_get_vbt(struct drm_i915_private *i915) +{ + u32 count, data, found, store = 0; + u32 static_region, oprom_offset; + u32 oprom_size = 0x200000; + u16 vbt_size; + u32 *vbt; + + static_region = intel_uncore_read(&i915->uncore, SPI_STATIC_REGIONS); + static_region &= OPTIONROM_SPI_REGIONID_MASK; + intel_uncore_write(&i915->uncore, PRIMARY_SPI_REGIONID, static_region); + + oprom_offset = intel_uncore_read(&i915->uncore, OROM_OFFSET); + oprom_offset &= OROM_OFFSET_MASK; + + for (count = 0; count < oprom_size; count += 4) { + intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, oprom_offset + count); + data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER); + + if (data == *((const u32 *)"$VBT")) { + found = oprom_offset + count; + break; + } + } + + if (count >= oprom_size) + goto err_not_found; + + /* Get VBT size and allocate space for the VBT */ + intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found + + offsetof(struct vbt_header, vbt_size)); + vbt_size = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER); + vbt_size &= 0xffff; + + vbt = kzalloc(vbt_size, GFP_KERNEL); + if (!vbt) { + DRM_ERROR("Unable to allocate %u bytes for VBT storage\n", + vbt_size); + goto err_not_found; + } + + for (count = 0; count < vbt_size; count += 4) { + intel_uncore_write(&i915->uncore, PRIMARY_SPI_ADDRESS, found + count); + data = intel_uncore_read(&i915->uncore, PRIMARY_SPI_TRIGGER); + *(vbt + store++) = data; + } + + if (!intel_bios_is_valid_vbt(vbt, vbt_size)) + goto err_free_vbt; + + DRM_DEBUG_KMS("Found valid VBT in SPI flash\n"); + + return (struct vbt_header *)vbt; + +err_free_vbt: + kfree(vbt); +err_not_found: + return NULL; +} + static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915) { struct pci_dev *pdev = to_pci_dev(i915->drm.dev); @@ -2287,6 +2347,8 @@ static struct vbt_header *oprom_get_vbt(struct drm_i915_private *i915) pci_unmap_rom(pdev, oprom); + DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n"); + return vbt; err_free_vbt: @@ -2321,17 +2383,23 @@ void intel_bios_init(struct drm_i915_private *i915) init_vbt_defaults(i915); - /* If the OpRegion does not have VBT, look in PCI ROM. */ + /* + * If the OpRegion does not have VBT, look in SPI flash through MMIO or + * PCI mapping + */ + if (!vbt && IS_DGFX(i915)) { + oprom_vbt = spi_oprom_get_vbt(i915); + vbt = oprom_vbt; + } + if (!vbt) { oprom_vbt = oprom_get_vbt(i915); - if (!oprom_vbt) - goto out; - vbt = oprom_vbt; - - drm_dbg_kms(&i915->drm, "Found valid VBT in PCI ROM\n"); } + if (!vbt) + goto out; + bdb = get_bdb_header(vbt); i915->vbt.version = bdb->version; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index da73dc939e58..54ff63b86df6 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -12540,6 +12540,14 @@ enum skl_power_gate { #define DP_PIN_ASSIGNMENT_MASK(idx) (0xf << ((idx) * 4)) #define DP_PIN_ASSIGNMENT(idx, x) ((x) << ((idx) * 4)) +#define PRIMARY_SPI_TRIGGER _MMIO(0x102040) +#define PRIMARY_SPI_ADDRESS _MMIO(0x102080) +#define PRIMARY_SPI_REGIONID _MMIO(0x102084) +#define SPI_STATIC_REGIONS _MMIO(0x102090) +#define OPTIONROM_SPI_REGIONID_MASK REG_GENMASK(7, 0) +#define OROM_OFFSET _MMIO(0x1020c0) +#define OROM_OFFSET_MASK REG_GENMASK(20, 16) + /* This register controls the Display State Buffer (DSB) engines. */ #define _DSBSL_INSTANCE_BASE 0x70B00 #define DSBSL_INSTANCE(pipe, id) (_DSBSL_INSTANCE_BASE + \