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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6829C77B72 for ; Wed, 12 Apr 2023 08:41:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230509AbjDLIl1 (ORCPT ); Wed, 12 Apr 2023 04:41:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231448AbjDLIkg (ORCPT ); Wed, 12 Apr 2023 04:40:36 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 39F00769A for ; Wed, 12 Apr 2023 01:40:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D79A862FFF for ; Wed, 12 Apr 2023 08:39:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBD7CC433EF; Wed, 12 Apr 2023 08:39:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1681288760; bh=wzmQDfNKTv0VFuShfuXDQ3CMxFViahBXUkJvsNOXfkE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sOC6nu2niF2y2tG8J6tzMzfazeLwcTH1zfQDMNVRC5wP6jHDNMKyw8KvWJASs4S7/ vemWTDmkCMFyMMoH1FcAOTjYjkdQU7/4lAq1l4R09Hs1CJyaZP/GO7+Va3wJieS4rG 836b07LpCsPNZ3v02vgSA1jhfGDEnnhXIFuncLcY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Amit Pundir , Robert Foss Subject: [PATCH 5.15 92/93] drm/bridge: lt9611: Fix PLL being unable to lock Date: Wed, 12 Apr 2023 10:34:33 +0200 Message-Id: <20230412082827.028129824@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230412082823.045155996@linuxfoundation.org> References: <20230412082823.045155996@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Robert Foss commit 2a9df204be0bbb896e087f00b9ee3fc559d5a608 upstream. This fixes PLL being unable to lock, and is derived from an equivalent downstream commit. Available LT9611 documentation does not list this register, neither does LT9611UXC (which is a different chip). This commit has been confirmed to fix HDMI output on DragonBoard 845c. Suggested-by: Amit Pundir Reviewed-by: Amit Pundir Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20221213150304.4189760-1-robert.foss@linaro.org Signed-off-by: Amit Pundir Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/bridge/lontium-lt9611.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -256,6 +256,7 @@ static int lt9611_pll_setup(struct lt961 { 0x8126, 0x55 }, { 0x8127, 0x66 }, { 0x8128, 0x88 }, + { 0x812a, 0x20 }, }; regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));