From patchwork Mon Aug 3 19:24:56 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: arun.siluvery@linux.intel.com X-Patchwork-Id: 6932951 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2350AC05AC for ; Mon, 3 Aug 2015 19:25:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5FE7A20638 for ; Mon, 3 Aug 2015 19:25:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 8341020615 for ; Mon, 3 Aug 2015 19:25:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 436E16E659; Mon, 3 Aug 2015 12:25:09 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 8B7A46E45B for ; Mon, 3 Aug 2015 12:25:03 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 03 Aug 2015 12:25:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,603,1432623600"; d="scan'208";a="741367689" Received: from asiluver-linux.isw.intel.com ([10.102.226.117]) by orsmga001.jf.intel.com with ESMTP; 03 Aug 2015 12:25:03 -0700 From: Arun Siluvery To: intel-gfx@lists.freedesktop.org Date: Mon, 3 Aug 2015 20:24:56 +0100 Message-Id: <1438629897-2993-2-git-send-email-arun.siluvery@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1438629897-2993-1-git-send-email-arun.siluvery@linux.intel.com> References: <1438629897-2993-1-git-send-email-arun.siluvery@linux.intel.com> Cc: Ben Widawsky Subject: [Intel-gfx] [PATCH v1 1/2] drm/i915:skl: Add WaEnableGapsTsvCreditFix X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Cc: Ben Widawsky Cc: Joonas Lahtinen Signed-off-by: Arun Siluvery Tested-by: Ben Widawsky Reviewed-by: Ben Widawsky Tested-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_pm.c | 6 ++++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 77967ca..8991cd5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6849,6 +6849,9 @@ enum skl_disp_power_wells { #define GEN7_MISCCPCTL (0x9424) #define GEN7_DOP_CLOCK_GATE_ENABLE (1<<0) +#define GEN8_GARBCNTL 0xB004 +#define GEN9_GAPS_TSV_CREDIT_DISABLE (1<<7) + /* IVYBRIDGE DPF */ #define GEN7_L3CDERRST1 0xB008 /* L3CD Error Status 1 */ #define HSW_L3CDERRST11 0xB208 /* L3CD Error Status register 1 slice 1 */ diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index c23cab6..9152113 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -106,6 +106,12 @@ static void skl_init_clock_gating(struct drm_device *dev) /* WaDisableLSQCROPERFforOCL:skl */ I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) | GEN8_LQSC_RO_PERF_DIS); + + /* WaEnableGapsTsvCreditFix:skl */ + if (IS_SKYLAKE(dev) && (INTEL_REVID(dev) >= SKL_REVID_C0)) { + I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | + GEN9_GAPS_TSV_CREDIT_DISABLE)); + } } static void bxt_init_clock_gating(struct drm_device *dev)