From patchwork Tue Oct 29 11:50:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Govindapillai X-Patchwork-Id: 13854786 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 4A7BED2AB20 for ; Tue, 29 Oct 2024 11:50:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E04B10E004; Tue, 29 Oct 2024 11:50:56 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="OjQXQUam"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id E869010E004 for ; Tue, 29 Oct 2024 11:50:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730202654; x=1761738654; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=HOBD2iIaD+fvgV3LVStMpPbGGehR8KUM+AU+xWqMpRs=; b=OjQXQUam8H5GXercGQcm3AKi7zCY3poUzs4bp6MG2EMNORaCIp9Bbr7M PSXMhDZLSd96AK9PYWnpnE9p5HTqff1CnLRMsysWzrXhYR53fvKS1uwPt 1UCeCyBs/NdM9gREe8yWJn+8n9rwV3/JsNurpRSdInFgRPsA07x4KmJji FvYOgHe2tnIdVho+Rz6lZY4sqc78sxMx8zFB9SI6odeshfO875jUXQqdE aviKCArG6REdMnldlAnAum8WGhpW1J9WwhnZPMxb3nDWHiGKa36mxH9yu VL46EWxJmVW0Loovos1RLT6MWHwXjUlZWNNqfSJ7GJ+mkqVJyd/3xUZ0A Q==; X-CSE-ConnectionGUID: a+yqZhBrRveS7OuUeAth4w== X-CSE-MsgGUID: J58FZl45Rk6qGJa6H/Vozg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="30028910" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="30028910" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 04:50:54 -0700 X-CSE-ConnectionGUID: 61MqlIhxQOmct7eFy3wZcg== X-CSE-MsgGUID: IHdns6O1S8qUknvJjp/T4g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,241,1725346800"; d="scan'208";a="85895727" Received: from dneilan-mobl1.ger.corp.intel.com (HELO vgovind2-mobl3..) ([10.245.244.48]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 04:50:51 -0700 From: Vinod Govindapillai To: intel-gfx@lists.freedesktop.org Cc: vinod.govindapillai@intel.com, uma.shankar@intel.com, jani.nikula@intel.com Subject: [PATCH v6] drm/i915: Implement Dbuf overlap detection feature starting from LNL Date: Tue, 29 Oct 2024 13:50:40 +0200 Message-Id: <20241029115040.111855-1-vinod.govindapillai@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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" From: Stanislav Lisovskiy From LNL onwards there is a new hardware feature, which allows to detect if the driver wrongly allocated DBuf entries and they happen to overlap. If enabled this will cause a specific interrupt to occur. We now handle it in the driver, by writing correspondent error message to kernel log. v2: Initialize dbuf overlap flag in runtime_defaults (Jani Nikula) v3: Unmask the overlap detection interrupt (Uma) v4: use display over i915 (Jani Nikula) v5: Use display instead of dev_priv (Jani Nikula) Bspec: 69450, 69464 Signed-off-by: Stanislav Lisovskiy Signed-off-by: Vinod Govindapillai --- drivers/gpu/drm/i915/display/intel_display_device.c | 5 +++++ drivers/gpu/drm/i915/display/intel_display_device.h | 2 ++ drivers/gpu/drm/i915/display/intel_display_irq.c | 10 ++++++++++ drivers/gpu/drm/i915/i915_reg.h | 2 ++ 4 files changed, 19 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c index aa22189e3853..16e048b83014 100644 --- a/drivers/gpu/drm/i915/display/intel_display_device.c +++ b/drivers/gpu/drm/i915/display/intel_display_device.c @@ -1227,6 +1227,7 @@ static const struct intel_display_device_info xe2_lpd_display = { .__runtime_defaults.fbc_mask = BIT(INTEL_FBC_A) | BIT(INTEL_FBC_B) | BIT(INTEL_FBC_C) | BIT(INTEL_FBC_D), + .__runtime_defaults.has_dbuf_overlap_detection = true, }; static const struct intel_display_device_info xe2_hpd_display = { @@ -1668,6 +1669,10 @@ static void __intel_display_device_info_runtime_init(struct drm_i915_private *i9 if (IS_DISPLAY_VER(i915, 10, 12) && (dfsm & GLK_DFSM_DISPLAY_DSC_DISABLE)) display_runtime->has_dsc = 0; + + if (DISPLAY_VER(display) >= 20 && + (dfsm & XE2LPD_DFSM_DBUF_OVERLAP_DISABLE)) + display_runtime->has_dbuf_overlap_detection = false; } if (DISPLAY_VER(i915) >= 20) { diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h b/drivers/gpu/drm/i915/display/intel_display_device.h index 071a36b51f79..6bf5672d874d 100644 --- a/drivers/gpu/drm/i915/display/intel_display_device.h +++ b/drivers/gpu/drm/i915/display/intel_display_device.h @@ -125,6 +125,7 @@ enum intel_display_subplatform { #define HAS_CDCLK_SQUASH(i915) (DISPLAY_INFO(i915)->has_cdclk_squash) #define HAS_CUR_FBC(i915) (!HAS_GMCH(i915) && IS_DISPLAY_VER(i915, 7, 13)) #define HAS_D12_PLANE_MINIMIZATION(i915) (IS_ROCKETLAKE(i915) || IS_ALDERLAKE_S(i915)) +#define HAS_DBUF_OVERLAP_DETECTION(__i915) (DISPLAY_RUNTIME_INFO(__i915)->has_dbuf_overlap_detection) #define HAS_DDI(i915) (DISPLAY_INFO(i915)->has_ddi) #define HAS_DISPLAY(i915) (DISPLAY_RUNTIME_INFO(i915)->pipe_mask != 0) #define HAS_DMC(i915) (DISPLAY_RUNTIME_INFO(i915)->has_dmc) @@ -232,6 +233,7 @@ struct intel_display_runtime_info { bool has_hdcp; bool has_dmc; bool has_dsc; + bool has_dbuf_overlap_detection; }; struct intel_display_device_info { diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c index a4f42ed3f21a..814b4c98412c 100644 --- a/drivers/gpu/drm/i915/display/intel_display_irq.c +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c @@ -902,6 +902,13 @@ gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir) struct intel_display *display = &dev_priv->display; bool found = false; + if (HAS_DBUF_OVERLAP_DETECTION(display)) { + if (iir & XE2LPD_DBUF_OVERLAP_DETECTED) { + drm_warn(display->drm, "DBuf overlap detected\n"); + found = true; + } + } + if (DISPLAY_VER(dev_priv) >= 14) { if (iir & (XELPDP_PMDEMAND_RSP | XELPDP_PMDEMAND_RSPTOUT_ERR)) { @@ -1789,6 +1796,9 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) de_port_masked |= DSI0_TE | DSI1_TE; } + if (HAS_DBUF_OVERLAP_DETECTION(display)) + de_misc_masked |= XE2LPD_DBUF_OVERLAP_DETECTED; + if (HAS_DSB(dev_priv)) de_pipe_masked |= GEN12_DSB_INT(INTEL_DSB_0) | GEN12_DSB_INT(INTEL_DSB_1) | diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 405f409e9761..327d1aa3f211 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2589,6 +2589,7 @@ #define GEN8_DE_MISC_GSE REG_BIT(27) #define GEN8_DE_EDP_PSR REG_BIT(19) #define XELPDP_PMDEMAND_RSP REG_BIT(3) +#define XE2LPD_DBUF_OVERLAP_DETECTED REG_BIT(1) #define GEN8_DE_MISC_IRQ_REGS I915_IRQ_REGS(GEN8_DE_MISC_IMR, \ GEN8_DE_MISC_IER, \ @@ -2894,6 +2895,7 @@ #define SKL_DFSM_PIPE_C_DISABLE (1 << 28) #define TGL_DFSM_PIPE_D_DISABLE (1 << 22) #define GLK_DFSM_DISPLAY_DSC_DISABLE (1 << 7) +#define XE2LPD_DFSM_DBUF_OVERLAP_DISABLE (1 << 3) #define XE2LPD_DE_CAP _MMIO(0x41100) #define XE2LPD_DE_CAP_3DLUT_MASK REG_GENMASK(31, 30)