From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6318C07520 for ; Thu, 13 Sep 2018 14:04:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 98A2D20652 for ; Thu, 13 Sep 2018 14:04:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98A2D20652 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731917AbeIMTNt (ORCPT ); Thu, 13 Sep 2018 15:13:49 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:35372 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727566AbeIMTNs (ORCPT ); Thu, 13 Sep 2018 15:13:48 -0400 Received: from localhost (ip-213-127-77-73.ip.prioritytelecom.net [213.127.77.73]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 1733BD35; Thu, 13 Sep 2018 14:04:08 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Heiko Stuebner , Ezequiel Garcia , Tomasz Figa Subject: [PATCH 4.18 170/197] drm/rockchip: vop: split out core clock enablement into separate functions Date: Thu, 13 Sep 2018 15:31:59 +0200 Message-Id: <20180913131848.361976379@linuxfoundation.org> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180913131841.568116777@linuxfoundation.org> References: <20180913131841.568116777@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Heiko Stuebner commit e2810a7167df14c762e085fae5aade38425b71bf upstream. Judging from the iommu code, both the hclk and aclk are necessary for register access. Split them off into separate functions from the regular vop enablement, so that we can use them elsewhere as well. Fixes: d0b912bd4c23 ("iommu/rockchip: Request irqs in rk_iommu_probe()") [prerequisite change for the actual fix] Cc: stable@vger.kernel.org Signed-off-by: Heiko Stuebner Tested-by: Ezequiel Garcia Reviewed-by: Tomasz Figa Link: https://patchwork.freedesktop.org/patch/msgid/20180612132028.27490-2-heiko@sntech.de Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 44 +++++++++++++++++++--------- 1 file changed, 31 insertions(+), 13 deletions(-) --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -486,6 +486,31 @@ static void vop_line_flag_irq_disable(st spin_unlock_irqrestore(&vop->irq_lock, flags); } +static int vop_core_clks_enable(struct vop *vop) +{ + int ret; + + ret = clk_enable(vop->hclk); + if (ret < 0) + return ret; + + ret = clk_enable(vop->aclk); + if (ret < 0) + goto err_disable_hclk; + + return 0; + +err_disable_hclk: + clk_disable(vop->hclk); + return ret; +} + +static void vop_core_clks_disable(struct vop *vop) +{ + clk_disable(vop->aclk); + clk_disable(vop->hclk); +} + static int vop_enable(struct drm_crtc *crtc) { struct vop *vop = to_vop(crtc); @@ -497,17 +522,13 @@ static int vop_enable(struct drm_crtc *c return ret; } - ret = clk_enable(vop->hclk); + ret = vop_core_clks_enable(vop); if (WARN_ON(ret < 0)) goto err_put_pm_runtime; ret = clk_enable(vop->dclk); if (WARN_ON(ret < 0)) - goto err_disable_hclk; - - ret = clk_enable(vop->aclk); - if (WARN_ON(ret < 0)) - goto err_disable_dclk; + goto err_disable_core; /* * Slave iommu shares power, irq and clock with vop. It was associated @@ -519,7 +540,7 @@ static int vop_enable(struct drm_crtc *c if (ret) { DRM_DEV_ERROR(vop->dev, "failed to attach dma mapping, %d\n", ret); - goto err_disable_aclk; + goto err_disable_dclk; } spin_lock(&vop->reg_lock); @@ -558,12 +579,10 @@ static int vop_enable(struct drm_crtc *c return 0; -err_disable_aclk: - clk_disable(vop->aclk); err_disable_dclk: clk_disable(vop->dclk); -err_disable_hclk: - clk_disable(vop->hclk); +err_disable_core: + vop_core_clks_disable(vop); err_put_pm_runtime: pm_runtime_put_sync(vop->dev); return ret; @@ -609,8 +628,7 @@ static void vop_crtc_atomic_disable(stru rockchip_drm_dma_detach_device(vop->drm_dev, vop->dev); clk_disable(vop->dclk); - clk_disable(vop->aclk); - clk_disable(vop->hclk); + vop_core_clks_disable(vop); pm_runtime_put(vop->dev); mutex_unlock(&vop->vop_lock);