From patchwork Tue Apr 26 08:21:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 566604 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 64CE4C433F5 for ; Tue, 26 Apr 2022 08:45:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345639AbiDZIsr (ORCPT ); Tue, 26 Apr 2022 04:48:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346535AbiDZIpH (ORCPT ); Tue, 26 Apr 2022 04:45:07 -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 DA0BB16B196; Tue, 26 Apr 2022 01:34:56 -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 2C5196185D; Tue, 26 Apr 2022 08:34:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C510C385A4; Tue, 26 Apr 2022 08:34:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650962095; bh=WEBbgczWrpbCXYwFl07E9jqszZ2qufQtN0yZY/YVjpg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mhEO8JDD2TW3OHeN1DIDnu0dNZPwbUjiVFG/h+bsafaZDoCbsDDBhTbKvASt2QNQ8 CrxNWPj652F/O2Zt+VK4Z1oYGzv27EO4kaetuFfAxdo03KQmQbaoZ2WxCDvcR1hOV5 EMU01ZYcxCwoqx965Qdn+HLi20mGhDH07dmoPlDs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Stevenson , Stefan Wahren , Maxime Ripard , Sasha Levin Subject: [PATCH 5.10 69/86] drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare Date: Tue, 26 Apr 2022 10:21:37 +0200 Message-Id: <20220426081743.198823808@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081741.202366502@linuxfoundation.org> References: <20220426081741.202366502@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dave Stevenson [ Upstream commit 5f18c0782b99e26121efa93d20b76c19e17aa1dd ] The panel has a prepare call which is before video starts, and an enable call which is after. The Toshiba bridge should be configured before video, so move the relevant power and initialisation calls to prepare. Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.") Signed-off-by: Dave Stevenson Signed-off-by: Stefan Wahren Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20220415162513.42190-3-stefan.wahren@i2se.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c index 90487df62480..4b92c6341490 100644 --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c @@ -265,7 +265,7 @@ static int rpi_touchscreen_noop(struct drm_panel *panel) return 0; } -static int rpi_touchscreen_enable(struct drm_panel *panel) +static int rpi_touchscreen_prepare(struct drm_panel *panel) { struct rpi_touchscreen *ts = panel_to_ts(panel); int i; @@ -295,6 +295,13 @@ static int rpi_touchscreen_enable(struct drm_panel *panel) rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01); msleep(100); + return 0; +} + +static int rpi_touchscreen_enable(struct drm_panel *panel) +{ + struct rpi_touchscreen *ts = panel_to_ts(panel); + /* Turn on the backlight. */ rpi_touchscreen_i2c_write(ts, REG_PWM, 255); @@ -349,7 +356,7 @@ static int rpi_touchscreen_get_modes(struct drm_panel *panel, static const struct drm_panel_funcs rpi_touchscreen_funcs = { .disable = rpi_touchscreen_disable, .unprepare = rpi_touchscreen_noop, - .prepare = rpi_touchscreen_noop, + .prepare = rpi_touchscreen_prepare, .enable = rpi_touchscreen_enable, .get_modes = rpi_touchscreen_get_modes, };