From patchwork Thu May 26 15:29:35 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Kuoppala X-Patchwork-Id: 9137161 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 32D416075C for ; Thu, 26 May 2016 15:30:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 27FB1282F6 for ; Thu, 26 May 2016 15:30:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1CDBE282FA; Thu, 26 May 2016 15:30:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DEE9A282F8 for ; Thu, 26 May 2016 15:30:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B09246E90D; Thu, 26 May 2016 15:30:04 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 66D556E90D for ; Thu, 26 May 2016 15:29:36 +0000 (UTC) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP; 26 May 2016 08:29:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,367,1459839600"; d="scan'208";a="985265594" Received: from rosetta.fi.intel.com (HELO rosetta) ([10.237.72.90]) by orsmga002.jf.intel.com with ESMTP; 26 May 2016 08:29:34 -0700 Received: by rosetta (Postfix, from userid 1000) id 4668180AD0; Thu, 26 May 2016 18:29:48 +0300 (EEST) From: Mika Kuoppala To: intel-gfx@lists.freedesktop.org Date: Thu, 26 May 2016 18:29:35 +0300 Message-Id: <1464276586-17939-13-git-send-email-mika.kuoppala@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1464276586-17939-1-git-send-email-mika.kuoppala@intel.com> References: <1464276586-17939-1-git-send-email-mika.kuoppala@intel.com> Subject: [Intel-gfx] [PATCH 12/23] drm/i915/kbl: Add WaDisableGamClockGating 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-Virus-Scanned: ClamAV using ClamSMTP According to bspec we need to disable gam unit clock gating on on kbl revids A0 and B0. References: HSD#2226858, HSD#1944358 Signed-off-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_pm.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5cba851370ec..14e0ec818ea4 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6937,6 +6937,7 @@ enum skl_disp_power_wells { #define EDRAM_SETS_IDX(cap) (((cap) >> 8) & 0x3) #define GEN6_UCGCTL1 _MMIO(0x9400) +# define GEN6_GAMUNIT_CLOCK_GATE_DISABLE (1 << 22) # define GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE (1 << 16) # define GEN6_BLBUNIT_CLOCK_GATE_DISABLE (1 << 5) # define GEN6_CSUNIT_CLOCK_GATE_DISABLE (1 << 7) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index b40f9dbbb215..8291f32db76e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6869,6 +6869,11 @@ static void kabylake_init_clock_gating(struct drm_device *dev) if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); + + /* WaDisableGamClockGating:kbl */ + if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) + I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) | + GEN6_GAMUNIT_CLOCK_GATE_DISABLE); } static void skylake_init_clock_gating(struct drm_device *dev)