From nobody Wed Dec 17 11:37:16 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 729FFC4167B for ; Wed, 1 Nov 2023 09:19:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234952AbjKAJTC (ORCPT ); Wed, 1 Nov 2023 05:19:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234822AbjKAJSy (ORCPT ); Wed, 1 Nov 2023 05:18:54 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9E4CB9 for ; Wed, 1 Nov 2023 02:18:48 -0700 (PDT) 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 44C9AE52; Wed, 1 Nov 2023 10:18:20 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1698830300; bh=9o8g+vSUQSS3NMbFAfGUkXi52cmu6Vb3V663gNfc4iY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=p/T0QMM11m5z3vXdBLD95kfaCJDQgXUYH5Y18q6/1yRkfjNCHx0NLbSThIUxS7tU4 n5Nt8UGErZQpNfl7nnGoYcP+aG5UNHdeH2wppHR5/vNDnl3h+kjgjYiDgE09SfbMga iEIgrs5XSnvSPf8iSJv9fEfZiJBSDXqhj+NATuO4= From: Tomi Valkeinen Date: Wed, 01 Nov 2023 11:17:41 +0200 Subject: [PATCH 04/10] 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: <20231101-tidss-probe-v1-4-45149e0f9415@ideasonboard.com> References: <20231101-tidss-probe-v1-0-45149e0f9415@ideasonboard.com> In-Reply-To: <20231101-tidss-probe-v1-0-45149e0f9415@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 , Tomi Valkeinen X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=1363; i=tomi.valkeinen@ideasonboard.com; h=from:subject:message-id; bh=9o8g+vSUQSS3NMbFAfGUkXi52cmu6Vb3V663gNfc4iY=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBlQhfmqKrrOflLOTzV3Rkv9Kbh/MN1PuuDm8/ON sPnotTWnrSJAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCZUIX5gAKCRD6PaqMvJYe 9WbBD/4mv6KLlnj3Gja378NvTcc+TdWKrXms3LxA6LYYNBr9MZP8NrejQnGyZ2scbA9TseQaLKl xqtmW3v5E0vgnfbFCxnvRpSiMN5LFF49++VbMbNUR9OBmNhhAIVKDdRnqefYS3q4f1AHfHWXriV siw+rcnKIWQGXm7PHo4JqLA6SCXpYmzQfuHkplxtl8UBki8/HiX/PxsUmizmZfLlTRZ9E+6THwV A6Bc69316TyAu4A+n6rPZqlEnVqZc5qzQZLndYj1/39Smem4725r1nE7jtsjPuKV2H0NgEinXQi qU+F9mA8H2KkiIwipJ4VyXgsjJCI+mRrsfPCeLDYwsF6sUX1O22/Na84WPcfZxrIaah6hvGejl2 ooEtZWgv5kqzRvw8A1hzsdSHwhikoKrYWu+vAFrKuRGRcvoJVJvvusoQUwOsMbg6f/n2yxJVMGd B3m7pIw3P5gzug99n3Je2D+KRpe9pfsMwWkqfO21Elw5xsrhhfDTuFeCbjxyQU7i54W3b1aak/i vYF+fOJYdx39Ld3wUzYz2+aJ1P7/OSZLb2gwBgYusMPb3e1lleR491ykd2XgM/w3hih3KZjDoYA fjuUhfMR6SJnmnPbGQ+U5qNsfPdevqyjfvtNjlvk2ideK0ZJxRaqF8rAduvr+VsLOSonkJo0R97 cm0/hvJnAwW77sg== 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. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- 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..9430625e2d62 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; @@ -2831,5 +2827,9 @@ int dispc_init(struct tidss_device *tidss) =20 tidss->dispc =3D dispc; =20 + /* K2G display controller does not support soft reset */ + if (feat->subrev !=3D DISPC_K2G) + dispc_softreset(dispc); + return 0; } --=20 2.34.1