From patchwork Mon Jan 24 18:33:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 535869 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 3E6DEC433F5 for ; Mon, 24 Jan 2022 20:18:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379562AbiAXUSb (ORCPT ); Mon, 24 Jan 2022 15:18:31 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:41480 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355522AbiAXUOe (ORCPT ); Mon, 24 Jan 2022 15:14:34 -0500 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 3543A6136F; Mon, 24 Jan 2022 20:14:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16D72C340E5; Mon, 24 Jan 2022 20:14:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643055273; bh=j+8sXLzOQnlFkViBcZSzrk1Sed4gjMfigw/8TIBl0nU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MJxIRNpbHiMq/xsrwRrmjUiSyLbYvxMWJAV87IXh6whFt+C0Q5U+rMy31fPz30aiB aPz3ouq8X21ArTgG++1NWl6UJ01MRoCaIrWO7ZPia3ZK5cQcPupcgLu+kBsvhNP/uH Fyq28wDTJm+T6wzqft+nr9L2/ACyFqeeySqVcj5g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Maxime Ripard , Dave Stevenson , Sasha Levin Subject: [PATCH 5.15 097/846] drm/vc4: hdmi: Enable the scrambler on reconnection Date: Mon, 24 Jan 2022 19:33:34 +0100 Message-Id: <20220124184104.336160681@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184100.867127425@linuxfoundation.org> References: <20220124184100.867127425@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Maxime Ripard [ Upstream commit b7551457c5d0b3505b0be247d47919c1ee30506d ] If we have a state already and disconnect/reconnect the display, the SCDC messages won't be sent again since we didn't go through a disable / enable cycle. In order to fix this, let's call the vc4_hdmi_enable_scrambling function in the detect callback if there is a mode and it needs the scrambler to be enabled. Fixes: c85695a2016e ("drm/vc4: hdmi: Enable the scrambler") Signed-off-by: Maxime Ripard Reviewed-by: Dave Stevenson Link: https://lore.kernel.org/r/20211025152903.1088803-10-maxime@cerno.tech Signed-off-by: Sasha Levin --- drivers/gpu/drm/vc4/vc4_hdmi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 49944644a9b36..e880bdd8dcfd2 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -162,6 +162,8 @@ static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {} #endif +static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder); + static enum drm_connector_status vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) { @@ -190,6 +192,7 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) } } + vc4_hdmi_enable_scrambling(&vc4_hdmi->encoder.base.base); pm_runtime_put(&vc4_hdmi->pdev->dev); return connector_status_connected; }