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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17642C4332F for ; Tue, 26 Oct 2021 18:13:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E6C546103C for ; Tue, 26 Oct 2021 18:13:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238117AbhJZSPw (ORCPT ); Tue, 26 Oct 2021 14:15:52 -0400 Received: from aposti.net ([89.234.176.197]:40374 "EHLO aposti.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238118AbhJZSPu (ORCPT ); Tue, 26 Oct 2021 14:15:50 -0400 From: Paul Cercueil To: David Airlie , Daniel Vetter Cc: Laurent Pinchart , Sam Ravnborg , "H . Nikolaus Schaller" , Paul Boddie , list@opendingux.net, linux-mips@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Paul Cercueil Subject: [RESEND PATCH v3 4/6] drm/ingenic: Set DMA descriptor chain register when starting CRTC Date: Tue, 26 Oct 2021 19:12:38 +0100 Message-Id: <20211026181240.213806-5-paul@crapouillou.net> In-Reply-To: <20211026181240.213806-1-paul@crapouillou.net> References: <20211026181240.213806-1-paul@crapouillou.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Setting the DMA descriptor chain register in the probe function has been fine until now, because we only ever had one descriptor per foreground. As the driver will soon have real descriptor chains, and the DMA descriptor chain register updates itself to point to the current descriptor being processed, this register needs to be reset after a full modeset to point to the first descriptor of the chain. Signed-off-by: Paul Cercueil --- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index 5dbeca0f8f37..cbc76cede99e 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -186,6 +186,10 @@ static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc, regmap_write(priv->map, JZ_REG_LCD_STATE, 0); + /* Set address of our DMA descriptor chain */ + regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, 0)); + regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1)); + regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_ENABLE); -- 2.33.0