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 EA4A0C4332F for ; Mon, 12 Dec 2022 13:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231622AbiLLN3n (ORCPT ); Mon, 12 Dec 2022 08:29:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232054AbiLLN3l (ORCPT ); Mon, 12 Dec 2022 08:29:41 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FE6B3BD for ; Mon, 12 Dec 2022 05:29:39 -0800 (PST) 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 DFAEC61025 for ; Mon, 12 Dec 2022 13:29:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 158B2C433EF; Mon, 12 Dec 2022 13:29:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670851778; bh=H6/YYY3nYiet+wkunn+/UdDdUBVnFek4KCd/16UM1Hg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=supdlNuvjasdRqp++lgo0DS91EYr2XGJgEDt2JueJmug5+SM5y8CwfcfBPpXHKboZ o8SHWNLKAGlL+YeshQHmLX6FlmHp7roDzBiivPZ/jdGc0mrGy0te+TS9QdnMwQmhc/ xiFnkxmwhFJEM8j0m9UtrDU8m3EmpJZhy6+wsQmQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qiqi Zhang , Douglas Anderson , Tomi Valkeinen , Sasha Levin Subject: [PATCH 5.15 068/123] drm/bridge: ti-sn65dsi86: Fix output polarity setting bug Date: Mon, 12 Dec 2022 14:17:14 +0100 Message-Id: <20221212130929.813083781@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130926.811961601@linuxfoundation.org> References: <20221212130926.811961601@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: Qiqi Zhang [ Upstream commit 8c115864501fc09932cdfec53d9ec1cde82b4a28 ] According to the description in ti-sn65dsi86's datasheet: CHA_HSYNC_POLARITY: 0 = Active High Pulse. Synchronization signal is high for the sync pulse width. (default) 1 = Active Low Pulse. Synchronization signal is low for the sync pulse width. CHA_VSYNC_POLARITY: 0 = Active High Pulse. Synchronization signal is high for the sync pulse width. (Default) 1 = Active Low Pulse. Synchronization signal is low for the sync pulse width. We should only set these bits when the polarity is negative. Fixes: a095f15c00e2 ("drm/bridge: add support for sn65dsi86 bridge driver") Signed-off-by: Qiqi Zhang Reviewed-by: Douglas Anderson Tested-by: Douglas Anderson Reviewed-by: Tomi Valkeinen Signed-off-by: Douglas Anderson Link: https://patchwork.freedesktop.org/patch/msgid/20221125104558.84616-1-eddy.zhang@rock-chips.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 45a5f1e48f0e..bbedce0eedda 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -920,9 +920,9 @@ static void ti_sn_bridge_set_video_timings(struct ti_sn65dsi86 *pdata) &pdata->bridge.encoder->crtc->state->adjusted_mode; u8 hsync_polarity = 0, vsync_polarity = 0; - if (mode->flags & DRM_MODE_FLAG_PHSYNC) + if (mode->flags & DRM_MODE_FLAG_NHSYNC) hsync_polarity = CHA_HSYNC_POLARITY; - if (mode->flags & DRM_MODE_FLAG_PVSYNC) + if (mode->flags & DRM_MODE_FLAG_NVSYNC) vsync_polarity = CHA_VSYNC_POLARITY; ti_sn65dsi86_write_u16(pdata, SN_CHA_ACTIVE_LINE_LENGTH_LOW_REG, -- 2.35.1