From patchwork Tue Apr 26 08:21:21 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: 567983 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 133AFC4167B for ; Tue, 26 Apr 2022 08:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345341AbiDZIkR (ORCPT ); Tue, 26 Apr 2022 04:40:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345616AbiDZIjS (ORCPT ); Tue, 26 Apr 2022 04:39:18 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7FFF3E5E3; Tue, 26 Apr 2022 01:30:29 -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 ams.source.kernel.org (Postfix) with ESMTPS id 89023B81A2F; Tue, 26 Apr 2022 08:30:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFB46C385AC; Tue, 26 Apr 2022 08:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961827; bh=rLw953Az/rZrffvZu8YRdEAaJcsKIzJcS5+keQTz8fM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c7o+gvINQpO+zC6Z3D3wdrOxP+BZRfCuIlZOKa3eKu3W7XYJZAHQL2mUqZTjEhqUM SPsjaT8JgX4pRVC7CUN6o0EePKCcx76eb0z9h5uu0+dXBQbdcmXmZYvNYPqGfGSTr3 60KgL1h/xskigqaMi53H+GJWoMcIf5P59dd3+kB8= 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 5.4 41/62] drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare Date: Tue, 26 Apr 2022 10:21:21 +0200 Message-Id: <20220426081738.399047018@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081737.209637816@linuxfoundation.org> References: <20220426081737.209637816@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 6906f522521d..a621dd28ff70 100644 --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c @@ -268,7 +268,7 @@ 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; @@ -298,6 +298,13 @@ 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); @@ -352,7 +359,7 @@ 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, };