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Wed, 9 Oct 2019 21:19:23 +0800 From: Yong Wu To: Matthias Brugger , Joerg Roedel , Will Deacon Subject: [PATCH v2 4/4] iommu/mediatek: Reduce the tlb flush timeout value Date: Wed, 9 Oct 2019 21:19:03 +0800 Message-ID: <1570627143-29441-4-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1570627143-29441-1-git-send-email-yong.wu@mediatek.com> References: <1570627143-29441-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191009_061933_359497_D2AA89AD X-CRM114-Status: GOOD ( 12.29 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, anan.sun@mediatek.com, Nicolas Boichat , cui.zhang@mediatek.com, srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, Robin Murphy , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Reduce the tlb timeout value from 100000us to 1000us. the original value is so long that affect the multimedia performance. This is only a minor improvement rather than fixing a issue. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 607f92c..1e9ff25 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -195,7 +195,7 @@ static void mtk_iommu_tlb_add_flush(unsigned long iova, size_t size, * follows tlb_flush to avoid break the sequence. */ ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE, - tmp, tmp != 0, 10, 100000); + tmp, tmp != 0, 10, 1000); if (ret) { dev_warn(data->dev, "Partial TLB flush timed out, falling back to full flush\n");