From patchwork Fri Sep 14 08:38:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sharat Masetty X-Patchwork-Id: 10600507 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 C5B2E112B for ; Fri, 14 Sep 2018 09:17:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A395D2A45B for ; Fri, 14 Sep 2018 09:17:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 980662B517; Fri, 14 Sep 2018 09:17:05 +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 500322A45B for ; Fri, 14 Sep 2018 09:17:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 22E706E83B; Fri, 14 Sep 2018 09:10:52 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id E8DA86E008; Fri, 14 Sep 2018 08:39:14 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 7CA93601B4; Fri, 14 Sep 2018 08:39:14 +0000 (UTC) Received: from smasetty-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: smasetty@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id A111860708; Fri, 14 Sep 2018 08:39:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A111860708 From: Sharat Masetty To: freedreno@lists.freedesktop.org Subject: [PATCH] drm/msm/A5xx: Skip hardware preemption init if no preemption Date: Fri, 14 Sep 2018 14:08:55 +0530 Message-Id: <1536914335-19717-1-git-send-email-smasetty@codeaurora.org> X-Mailer: git-send-email 1.9.1 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Sharat Masetty , dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP In the case where preemption is not enabled, this patch simply skips preemption related initialization in hardware init sequence. Signed-off-by: Sharat Masetty Reviewed-by: Jordan Crouse --- drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c index 970c796..6a3c560 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c @@ -208,6 +208,13 @@ void a5xx_preempt_hw_init(struct msm_gpu *gpu) struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu); int i; + /* Always come up on rb 0 */ + a5xx_gpu->cur_ring = gpu->rb[0]; + + /* No preemption if we only have one ring */ + if (gpu->nr_rings == 1) + return; + for (i = 0; i < gpu->nr_rings; i++) { a5xx_gpu->preempt[i]->wptr = 0; a5xx_gpu->preempt[i]->rptr = 0; @@ -220,9 +227,6 @@ void a5xx_preempt_hw_init(struct msm_gpu *gpu) /* Reset the preemption state */ set_preempt_state(a5xx_gpu, PREEMPT_NONE); - - /* Always come up on rb 0 */ - a5xx_gpu->cur_ring = gpu->rb[0]; } static int preempt_init_ring(struct a5xx_gpu *a5xx_gpu,