From patchwork Thu Mar 28 12:22:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Usyskin X-Patchwork-Id: 13608453 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CD1BDC54E64 for ; Thu, 28 Mar 2024 12:26:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 35AAC10EC2E; Thu, 28 Mar 2024 12:26:26 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="b78tK3w9"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1A81210F325 for ; Thu, 28 Mar 2024 12:26:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711628783; x=1743164783; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+l5HV3zC1lqNb/d0RlBIdQl9EOvfaUBG/49zCzdRb7Y=; b=b78tK3w9PySwSWgPUQay9A9/vgdIHdu6ILAlojXOfwF14SPePAJuypvZ rH8HDrIw5VKSgZ7ixGWiRbrd12PkbId7+xlTyzpH2+gaN/RYXNkaOmpAF t7w5u8DtZAM2L8W1aBs0o4pdgPoX0N7B2sSD7iC4NAiidulQMevDMBsIH 6qjm2z5OMgN2jwQ+QI+VWbuwju1hmz2Py5gLNngxOh7IkybFB2T5dvi/z NvZvQLTAH/eksXO5PZAp8AKfpG5S8kOAk9Nk8Qij1EjpIlxpQmLyUKrKe EoSNjNNMCG5dpV4BM7nCmDLXTTK1zeOnHt4rkAEmT8koNjPbs6XDgq+40 A==; X-CSE-ConnectionGUID: W965FyqRTM2xzlV2/+yfCA== X-CSE-MsgGUID: Zm7UvJByRIOhbgliDIGa6Q== X-IronPort-AV: E=McAfee;i="6600,9927,11026"; a="17505458" X-IronPort-AV: E=Sophos;i="6.07,161,1708416000"; d="scan'208";a="17505458" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Mar 2024 05:26:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,161,1708416000"; d="scan'208";a="16657566" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Mar 2024 05:26:20 -0700 From: Alexander Usyskin To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi Cc: Alexander Usyskin , Vitaly Lubart , linux-mtd@lists.infradead.org, intel-gfx@lists.freedesktop.org, Lucas De Marchi , Tomas Winkler Subject: [PATCH 02/13] drm/i915/spi: add spi device for discrete graphics Date: Thu, 28 Mar 2024 14:22:25 +0200 Message-Id: <20240328122236.1718111-3-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240328122236.1718111-1-alexander.usyskin@intel.com> References: <20240328122236.1718111-1-alexander.usyskin@intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Enable access to internal spi on DGFX devices via a child device. The spi child device is exposed via auxiliary bus. CC: Rodrigo Vivi CC: Lucas De Marchi Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin --- drivers/gpu/drm/i915/Makefile | 4 ++ drivers/gpu/drm/i915/i915_driver.c | 6 +++ drivers/gpu/drm/i915/i915_drv.h | 4 ++ drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/spi/intel_spi.c | 64 ++++++++++++++++++++++++++++ drivers/gpu/drm/i915/spi/intel_spi.h | 15 +++++++ 6 files changed, 94 insertions(+) create mode 100644 drivers/gpu/drm/i915/spi/intel_spi.c create mode 100644 drivers/gpu/drm/i915/spi/intel_spi.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e777686190ca..2bd481862a48 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -239,6 +239,10 @@ i915-y += \ i915-y += \ gt/intel_gsc.o +# graphics spi device (DGFX) support +i915-y += \ + spi/intel_spi.o + # graphics hardware monitoring (HWMON) support i915-$(CONFIG_HWMON) += \ i915_hwmon.o diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index c7d7c3b7ecc6..716fa20c52ce 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -81,6 +81,8 @@ #include "soc/intel_dram.h" #include "soc/intel_gmch.h" +#include "spi/intel_spi.h" + #include "i915_debugfs.h" #include "i915_driver.h" #include "i915_drm_client.h" @@ -619,6 +621,8 @@ static void i915_driver_register(struct drm_i915_private *dev_priv) /* Depends on sysfs having been initialized */ i915_perf_register(dev_priv); + intel_spi_init(dev_priv); + for_each_gt(gt, dev_priv, i) intel_gt_driver_register(gt); @@ -662,6 +666,8 @@ static void i915_driver_unregister(struct drm_i915_private *dev_priv) i915_hwmon_unregister(dev_priv); + intel_spi_fini(dev_priv); + i915_perf_unregister(dev_priv); i915_pmu_unregister(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 861567362abd..e8e0d9ff4e66 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -34,6 +34,8 @@ #include +#include + #include #include "display/intel_display_limits.h" @@ -330,6 +332,8 @@ struct drm_i915_private { struct i915_perf perf; + struct intel_dg_spi_dev spi; + struct i915_hwmon *hwmon; struct intel_gt *gt[I915_MAX_GT]; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 27dc903f0553..8b2935e384e3 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -928,6 +928,7 @@ #define DG2_GSC_HECI2_BASE 0x00374000 #define MTL_GSC_HECI1_BASE 0x00116000 #define MTL_GSC_HECI2_BASE 0x00117000 +#define GEN12_GUNIT_SPI_BASE 0x00102040 #define HECI_H_CSR(base) _MMIO((base) + 0x4) #define HECI_H_CSR_IE REG_BIT(0) diff --git a/drivers/gpu/drm/i915/spi/intel_spi.c b/drivers/gpu/drm/i915/spi/intel_spi.c new file mode 100644 index 000000000000..17e4c7861ef5 --- /dev/null +++ b/drivers/gpu/drm/i915/spi/intel_spi.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright(c) 2019-2024, Intel Corporation. All rights reserved. + */ + +#include +#include +#include "i915_reg.h" +#include "i915_drv.h" +#include "spi/intel_spi.h" + +#define GEN12_GUNIT_SPI_SIZE 0x80 + +static void i915_spi_release_dev(struct device *dev) +{ +} + +void intel_spi_init(struct drm_i915_private *dev_priv) +{ + struct intel_dg_spi_dev *spi = &dev_priv->spi; + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); + struct auxiliary_device *aux_dev = &spi->aux_dev; + int ret; + + /* Only the DGFX devices have internal SPI */ + if (!IS_DGFX(dev_priv)) + return; + + spi->bar.parent = &pdev->resource[0]; + spi->bar.start = GEN12_GUNIT_SPI_BASE + pdev->resource[0].start; + spi->bar.end = spi->bar.start + GEN12_GUNIT_SPI_SIZE - 1; + spi->bar.flags = IORESOURCE_MEM; + spi->bar.desc = IORES_DESC_NONE; + + aux_dev->name = "spi"; + aux_dev->id = (pci_domain_nr(pdev->bus) << 16) | + PCI_DEVID(pdev->bus->number, pdev->devfn); + aux_dev->dev.parent = &pdev->dev; + aux_dev->dev.release = i915_spi_release_dev; + + ret = auxiliary_device_init(aux_dev); + if (ret) { + dev_err(&pdev->dev, "i915-spi aux init failed %d\n", ret); + return; + } + + ret = auxiliary_device_add(aux_dev); + if (ret) { + dev_err(&pdev->dev, "i915-spi aux add failed %d\n", ret); + auxiliary_device_uninit(aux_dev); + return; + } +} + +void intel_spi_fini(struct drm_i915_private *dev_priv) +{ + struct intel_dg_spi_dev *spi = &dev_priv->spi; + struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); + + dev_dbg(&pdev->dev, "removing i915-spi cell\n"); + + auxiliary_device_delete(&spi->aux_dev); + auxiliary_device_uninit(&spi->aux_dev); +} diff --git a/drivers/gpu/drm/i915/spi/intel_spi.h b/drivers/gpu/drm/i915/spi/intel_spi.h new file mode 100644 index 000000000000..ed4153401f5d --- /dev/null +++ b/drivers/gpu/drm/i915/spi/intel_spi.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright(c) 2019-2024 Intel Corporation. All rights reserved. + */ + +#ifndef __INTEL_SPI_H__ +#define __INTEL_SPI_H__ + +struct drm_i915_private; + +void intel_spi_init(struct drm_i915_private *i915); + +void intel_spi_fini(struct drm_i915_private *i915); + +#endif /* __INTEL_SPI_H__ */