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 DED22C5AE4A for ; Wed, 15 Nov 2023 21:07:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233800AbjKOVHZ (ORCPT ); Wed, 15 Nov 2023 16:07:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234894AbjKOVHY (ORCPT ); Wed, 15 Nov 2023 16:07:24 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70C7B196 for ; Wed, 15 Nov 2023 13:07:20 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5E98C3278C; Wed, 15 Nov 2023 20:49:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700081346; bh=onpxm8VjMDSwXHH/2+FL3wouTM8BhIYE9ZdqUjoYooc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JLobFZdznwys2IAUYy7tImxvDD/Uy0jieHZ22qwQdUE1GMC/FgBGmt7HOIV1EsmoM aqCKtDpv/hc+pecBOTqPwjZ7RDXqdSzo6IOQ5QIFUa/g9fB+1apPA40kDHTBsguFjD unC27qduRHqcEKZG4mRCq2TqALVJwN9NdNsYWT0A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Peter Ujfalusi , Marcel Ziswiler , Tomi Valkeinen , Robert Foss , Sasha Levin , Maxim Schwalm Subject: [PATCH 5.15 097/244] drm/bridge: tc358768: Fix bit updates Date: Wed, 15 Nov 2023 15:34:49 -0500 Message-ID: <20231115203554.173139709@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115203548.387164783@linuxfoundation.org> References: <20231115203548.387164783@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomi Valkeinen [ Upstream commit 66962d5c3c51377b9b90cae35b7e038950438e02 ] The driver has a few places where it does: if (thing_is_enabled_in_config) update_thing_bit_in_hw() This means that if the thing is _not_ enabled, the bit never gets cleared. This affects the h/vsyncs and continuous DSI clock bits. Fix the driver to always update the bit. Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver") Reviewed-by: Peter Ujfalusi Tested-by: Maxim Schwalm # Asus TF700T Tested-by: Marcel Ziswiler Signed-off-by: Tomi Valkeinen Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20230906-tc358768-v4-4-31725f008a50@ideasonboard.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/tc358768.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 1e5304274ce20..d81c35a85330b 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -785,8 +785,8 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) val |= BIT(i + 1); tc358768_write(priv, TC358768_HSTXVREGEN, val); - if (!(mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)) - tc358768_write(priv, TC358768_TXOPTIONCNTRL, 0x1); + tc358768_write(priv, TC358768_TXOPTIONCNTRL, + (mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) ? 0 : BIT(0)); /* TXTAGOCNT[26:16] RXTASURECNT[10:0] */ val = tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk * 4); @@ -822,11 +822,12 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) tc358768_write(priv, TC358768_DSI_HACT, hact); /* VSYNC polarity */ - if (!(mode->flags & DRM_MODE_FLAG_NVSYNC)) - tc358768_update_bits(priv, TC358768_CONFCTL, BIT(5), BIT(5)); + tc358768_update_bits(priv, TC358768_CONFCTL, BIT(5), + (mode->flags & DRM_MODE_FLAG_PVSYNC) ? BIT(5) : 0); + /* HSYNC polarity */ - if (mode->flags & DRM_MODE_FLAG_PHSYNC) - tc358768_update_bits(priv, TC358768_PP_MISC, BIT(0), BIT(0)); + tc358768_update_bits(priv, TC358768_PP_MISC, BIT(0), + (mode->flags & DRM_MODE_FLAG_PHSYNC) ? BIT(0) : 0); /* Start DSI Tx */ tc358768_write(priv, TC358768_DSI_START, 0x1); -- 2.42.0