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 C927EC0015E for ; Sun, 16 Jul 2023 20:05:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231256AbjGPUFb (ORCPT ); Sun, 16 Jul 2023 16:05:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231245AbjGPUF0 (ORCPT ); Sun, 16 Jul 2023 16:05:26 -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 E1271199 for ; Sun, 16 Jul 2023 13:05:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 779FC60EB3 for ; Sun, 16 Jul 2023 20:05:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 871C5C433C8; Sun, 16 Jul 2023 20:05:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689537924; bh=K4cFRuLE+MyvbssmghWVqUZv1XOr+FVrs8SFrxcOrEw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Dw4fD+0J0tf2ZXF5kIdqYg7onXT1fy7jtLAzQd8nj3rpp+tXBefJLEjOoqlod+rAA iMjnuxGWNyTUVlcySOUagfGmuMHL4q9wyxJmKrJfEZzyqdLl0eicpBZGPuvRTWFA0t uJ2qLK4SEHUsYRNDOiYMGiDhYiUxYCL+P6UFTw5w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Francesco Dolcini , Robert Foss , Sasha Levin Subject: [PATCH 6.4 242/800] drm/bridge: tc358768: fix TXTAGOCNT computation Date: Sun, 16 Jul 2023 21:41:35 +0200 Message-ID: <20230716194954.722828787@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@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: Francesco Dolcini [ Upstream commit 3666aad8185af8d0ce164fd3c4974235417d6d0b ] Correct computation of TXTAGOCNT register. This register must be set to a value that ensure that the TTA-GO period = (4 x TLPX) with the actual value of TTA-GO being 4 x (TXTAGOCNT + 1) x (HSByteClk cycle) Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver") Signed-off-by: Francesco Dolcini Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20230427142934.55435-8-francesco@dolcini.it Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/tc358768.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index e3f456bfb90c1..d8209433d5f43 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -796,7 +796,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) /* TXTAGOCNT[26:16] RXTASURECNT[10:0] */ val = tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk * 4); - val = tc358768_ns_to_cnt(val, dsibclk_nsk) - 1; + val = tc358768_ns_to_cnt(val, dsibclk_nsk) / 4 - 1; val2 = tc358768_ns_to_cnt(tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk), dsibclk_nsk) - 2; val = val << 16 | val2; -- 2.39.2