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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 66704C25B75 for ; Sun, 19 May 2024 08:00:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=r4V5nWvG/QQ0DTSAT7IcKuzewHmodzitrkUa6G9ghao=; b=HTeetk5s2LkASb 9xyEthZXQYGn2KVd3jGiAt7KhoNxRg4YmSuZbBdq7mtCtwSr54dSpXUk9b8Z1uNRjpqrMMhPkazcV 4Fm6Ah6WwwQHNgAXdMVIQBeadG31CrNd3ktcdn3Ey0s21yHP4zdUb+Ms/3fCvEDBzR8fiGAgVVWj9 25gwjaIFQThQYi752MFQpsqieG91llxfYSp7iRG2NYBulyrygUoH0w3eZqWYyEanC6d3cgc/qOwc6 D8TU2U0oitfOfmwXgX7zqa4fQw9CYvzUOuGmEj41Swwit1/VtPfFZ+KMBiyA0/3L1P3JO3bQM1RYu zjrrQa7FtCPHXEyii/GQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s8bSU-0000000BbDM-3bJ1; Sun, 19 May 2024 07:59:54 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s8bSR-0000000BbBt-3g4l; Sun, 19 May 2024 07:59:53 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 3104B60E03; Sun, 19 May 2024 07:59:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55ABBC32782; Sun, 19 May 2024 07:59:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1716105590; bh=Js533fXv07i00ZGY091MEl3ChJe/lib4LdV6Kq4wzIc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=2MiSyS1OlozoQwxwtUwkCDqKXeCND4CH0dDYQqbT7fJjK9ZxDKBMY48MPbW/6vxpn ygZInnvC/+G/4ZA+IgCXOjN7J2ygMwgEPCNmjB+XuAAcpwvRpTRiKebKSupn00Qf8H uExc4kDcBAuzTOxuMi94XAcCZ+E+w+nc3kdm+Q7c= Date: Sun, 19 May 2024 09:59:47 +0200 From: Greg KH To: Val Packett Cc: stable@vger.kernel.org, Sandy Huang , Heiko =?iso-8859-1?Q?St=FCbner?= , Andy Yan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] drm/rockchip: vop: clear DMA stop bit on flush on RK3066 Message-ID: <2024051936-cosmetics-seismic-9fea@gregkh> References: <20240519074019.10424-1-val@packett.cool> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240519074019.10424-1-val@packett.cool> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240519_005951_979586_0DAB1EFF X-CRM114-Status: GOOD ( 14.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, May 19, 2024 at 04:31:31AM -0300, Val Packett wrote: > On the RK3066, there is a bit that must be cleared on flush, otherwise > we do not get display output (at least for RGB). > > Signed-off-by: Val Packett > Cc: stable@vger.kernel.org > --- > Hi! This was required to get display working on an old RK3066 tablet, > along with the next tiny patch in the series enabling the RGB output. > > I have spent quite a lot of time banging my head against the wall debugging > that display (especially since at the same time a scaler chip is used for > LVDS encoding), but finally adding debug prints showed that RK3066_SYS_CTRL0 > ended up being reset to all-zero after being written correctly upon init. > Looking at the register definitions in the vendor driver revealed that the > reason was pretty self-explanatory: "dma_stop". What commit id does this fix? thanks, greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel