From patchwork Mon Jul 1 06:26:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 11025073 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A148138B for ; Mon, 1 Jul 2019 06:34:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0E72528329 for ; Mon, 1 Jul 2019 06:34:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 030AA284DA; Mon, 1 Jul 2019 06:34:28 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B3B1B28329 for ; Mon, 1 Jul 2019 06:34:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 365C889E23; Mon, 1 Jul 2019 06:34:28 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 99A3B89E19 for ; Mon, 1 Jul 2019 06:34:27 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Jun 2019 23:34:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,437,1557212400"; d="scan'208";a="153988708" Received: from amanna.iind.intel.com ([10.223.74.216]) by orsmga007.jf.intel.com with ESMTP; 30 Jun 2019 23:34:25 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Date: Mon, 1 Jul 2019 11:56:26 +0530 Message-Id: <20190701062632.456-10-animesh.manna@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190701062632.456-1-animesh.manna@intel.com> References: <20190701062632.456-1-animesh.manna@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 09/15] drm/i915/dsb: functions to enable/disable DSB engine. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michel Thierry , Jani Nikula Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP DSB will be used for performance improvement for some special scenario. DSB engine will be enabled based on need and after completion of its work will be disabled. Api added for enable/disable operation by using DSB_CTRL register. Cc: Michel Thierry Cc: Jani Nikula Cc: Rodrigo Vivi Signed-off-by: Animesh Manna --- drivers/gpu/drm/i915/intel_dsb.c | 40 ++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dsb.c b/drivers/gpu/drm/i915/intel_dsb.c index 9ad4fc8b9f1e..33c812019cec 100644 --- a/drivers/gpu/drm/i915/intel_dsb.c +++ b/drivers/gpu/drm/i915/intel_dsb.c @@ -32,6 +32,46 @@ static inline bool is_dsb_busy(struct intel_dsb *dsb) return DSB_STATUS & I915_READ(DSB_CTRL(pipe, dsb->id)); } +static bool intel_dsb_enable_engine(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + u32 dsb_ctrl; + + dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id)); + + if (DSB_STATUS & dsb_ctrl) { + DRM_DEBUG_KMS("DSB engine is busy.\n"); + return false; + } + + dsb_ctrl |= DSB_ENABLE; + I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl); + + return true; +} + +static bool intel_dsb_disable_engine(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + u32 dsb_ctrl; + + dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id)); + + if (DSB_STATUS & dsb_ctrl) { + DRM_DEBUG_KMS("DSB engine is busy.\n"); + return false; + } + + dsb_ctrl &= ~DSB_ENABLE; + I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl); + + return true; +} + struct intel_dsb * intel_dsb_get(struct intel_crtc *crtc) {