From nobody Tue Dec 16 07:08:41 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67132C41535 for ; Thu, 9 Nov 2023 07:38:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233268AbjKIHi5 (ORCPT ); Thu, 9 Nov 2023 02:38:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232776AbjKIHiu (ORCPT ); Thu, 9 Nov 2023 02:38:50 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE77A173E for ; Wed, 8 Nov 2023 23:38:48 -0800 (PST) Received: from [127.0.1.1] (91-158-149-209.elisa-laajakaista.fi [91.158.149.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 73C6817E1; Thu, 9 Nov 2023 08:38:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1699515504; bh=1GEKCab8OHb1x6cabABKC9MQy0dJhOUkvWfwR9SFuWU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=lx6pfWLVWCmmHaDeuOyAaaC57VoXbIEoLYr8BDw0U3KVHnD1/6LHIjN3OmgxMMDSC y8iBt0vYIfWg4drQZrTcC3RWuVpOtBqbktQzQn4jsd6KIdv7OfNVRXwdqCJdvJwgCC 6ZE7wRaJ2kbVaQos1sdat+2e81zFgtOS0JcgF+RY= From: Tomi Valkeinen Date: Thu, 09 Nov 2023 09:37:57 +0200 Subject: [PATCH v2 04/11] drm/tidss: Move reset to the end of dispc_init() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20231109-tidss-probe-v2-4-ac91b5ea35c0@ideasonboard.com> References: <20231109-tidss-probe-v2-0-ac91b5ea35c0@ideasonboard.com> In-Reply-To: <20231109-tidss-probe-v2-0-ac91b5ea35c0@ideasonboard.com> To: Aradhya Bhatia , Devarsh Thakkar , Jyri Sarha , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Laurent Pinchart , Francesco Dolcini , Tomi Valkeinen X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=1539; i=tomi.valkeinen@ideasonboard.com; h=from:subject:message-id; bh=1GEKCab8OHb1x6cabABKC9MQy0dJhOUkvWfwR9SFuWU=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBlTIx+bzzkLDQBAuaUOAtJiZaksLTxdF5B9rdMq LxobCQK80CJAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCZUyMfgAKCRD6PaqMvJYe 9Rc8EACWQUnArZGNglO1/TEwH5VQgmaOPDpDdNQFrSWbEXfHEH5Mhxdb/yzQJAryQqHswgWONS8 zv/voBbUvNC+gHdYUL8s2VywJMRhGhpkrcraLdTCuXb/Y1Zq3W3uAH5rRvUT3JR7tNqkTXbcLVq aYLwe/Vt2ADLLrAqRjOPlh8gx1zQdobVUTpJaRVOG0b5+gjSpbaPlyJYmK5uhigtRkHzRGpC8e1 3nAnCQV8nK0EHAWEIpe+k1MKvSiqPR2vayBxmgmZzodzdjX/QQ5VdjEA13dOflDg7+RS13TDGbG F0Cm0oEZtmZotu7pZvDPPFml7byp3c1jMaEBYMoxTS4IVSPnf9GyhC1vwxM2yKymnKJ4qLuJZvv k7oKCpe/vDSUnEfPzcet1AYNoqBgHQccBJtkKpIN3BErRBnlZKECPH5HL8Wac2ccYxjnObxupe0 1+/yYW5coIxn0sctpwoAX0PcX20xxo32ctL0CSB51sIhfmT7S6d4bzRNFE+b41pUnTA6n+Cih41 CVJEULzPTsVu5NdAdyA+9prHk7TrCK2Sg2ZwlsvO4qnH2doDpe5yYCZXIUxgwfU9HY5ZMRnoDOe Mi206BOCbn0vLkHOm1cRtOUlCYkmqtyihGi756/uR1CKq80fzIFYjNiPaiLYseHyu00ThJaOfFK 0Op0KFDTJ2N6p6A== X-Developer-Key: i=tomi.valkeinen@ideasonboard.com; a=openpgp; fpr=C4380C3E965EFD81079FF3A7FA3DAA8CBC961EF5 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We do a DSS reset in the middle of the dispc_init(). While that happens to work now, we should really make sure that e..g the fclk, which is acquired only later in the function, is enabled when doing a reset. This will be handled in a later patch, but for now, let's move the dispc_softreset() call to the end of dispc_init(), which is a sensible place for it anyway. Reviewed-by: Laurent Pinchart Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/tidss/tidss_dispc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/ti= dss_dispc.c index ad7999434299..deb665d0ede8 100644 --- a/drivers/gpu/drm/tidss/tidss_dispc.c +++ b/drivers/gpu/drm/tidss/tidss_dispc.c @@ -2777,10 +2777,6 @@ int dispc_init(struct tidss_device *tidss) return r; } =20 - /* K2G display controller does not support soft reset */ - if (feat->subrev !=3D DISPC_K2G) - dispc_softreset(dispc); - for (i =3D 0; i < dispc->feat->num_vps; i++) { u32 gamma_size =3D dispc->feat->vp_feat.color.gamma_size; u32 *gamma_table; @@ -2829,6 +2825,10 @@ int dispc_init(struct tidss_device *tidss) of_property_read_u32(dispc->dev->of_node, "max-memory-bandwidth", &dispc->memory_bandwidth_limit); =20 + /* K2G display controller does not support soft reset */ + if (feat->subrev !=3D DISPC_K2G) + dispc_softreset(dispc); + tidss->dispc =3D dispc; =20 return 0; --=20 2.34.1