From patchwork Mon Jan 11 14:22:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 360732 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 550C9C433E6 for ; Mon, 11 Jan 2021 14:25:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21DE0224B8 for ; Mon, 11 Jan 2021 14:25:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388425AbhAKOYY (ORCPT ); Mon, 11 Jan 2021 09:24:24 -0500 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:55909 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731452AbhAKOYV (ORCPT ); Mon, 11 Jan 2021 09:24:21 -0500 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id AF511580671; Mon, 11 Jan 2021 09:23:15 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute6.internal (MEProxy); Mon, 11 Jan 2021 09:23:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm1; bh=dUEU7+mtatpsm 3n6Bg9z6AG1wwyBz3mt2EN+DMCMFms=; b=VFeIERgoP1KDc8lohNc8ynOVu49A5 3/TrQ4eZOaCgUJxaXOtul3Qca276iGHNMW3OcDuC9xTG4z5T8BDynGRbUzJo3nOP 4OLXd/jkXfqWw/mNqqeYmUlv+lNTNINkOP7vhVnNmygeyi7zyCa8ztLbvBS67BuV LAB3dMMil6gtioJ5S+agh4JWHbgriUb/kPpD8BQO6EIa6cVz0bJg5XSoQlgZGpto V6TzRGj1d9UuV8qTDS7JSMrR/pqkhDuAY8mb9niufbP4iIoPz+fsUs6JN8FLJp+T 7HlCbDkxL+Zu9BQwlEbxax+V2X+nTe2dZw28eNU6T6QPOBFdk+ddaBO8Q== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=dUEU7+mtatpsm3n6Bg9z6AG1wwyBz3mt2EN+DMCMFms=; b=fH/TbQTu VvTYmy6eZuzBRMdE3KBI07s7S/ZYHniQm6doAXT9gAAbQgjNHtijFC/Y6d7Rk8hY S1YckK3IAHB7cMb/2kZcpaMe2mhoPMAZDkWJsEb2oK22dxQwVWXiTkbdzQnMP08O 9EN48FKCTeWDnfWBpfEYyV1z/gkGEsgLh1Tr0SBk9bk4ZqLC5YRmmX77g7aRBWvY 0LFg5bOa762jwLji/rufhVoqePEUncPcv1rBVIWiCCJj3UX15cw8WEAYdSvqRvFn lBO/CzTL0x/o43+8ktuDCW5fj0/rUOu6L+/H9g/U4VByc40b+XBOABGVDXxqyXZG MPOUAQoa1ucpLg== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrvdehuddgieegucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpeforgigihhm vgcutfhiphgrrhguuceomhgrgihimhgvsegtvghrnhhordhtvggthheqnecuggftrfgrth htvghrnhepvdekleevfeffkeejhfffueelteelfeduieefheduudfggffhhfffheevveeh hedvnecukfhppeeltddrkeelrdeikedrjeeinecuvehluhhsthgvrhfuihiivgeptdenuc frrghrrghmpehmrghilhhfrhhomhepmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Received: from localhost (lfbn-tou-1-1502-76.w90-89.abo.wanadoo.fr [90.89.68.76]) by mail.messagingengine.com (Postfix) with ESMTPA id 4300824005A; Mon, 11 Jan 2021 09:23:15 -0500 (EST) From: Maxime Ripard To: Eric Anholt , Maarten Lankhorst , Thomas Zimmermann , Maxime Ripard , Daniel Vetter , David Airlie Cc: linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Hans Verkuil , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, bcm-kernel-feedback-list@broadcom.com, Mauro Carvalho Chehab , Dave Stevenson , linux-media@vger.kernel.org, Dom Cobley Subject: [PATCH v2 03/15] drm/vc4: hdmi: Fix register offset with longer CEC messages Date: Mon, 11 Jan 2021 15:22:57 +0100 Message-Id: <20210111142309.193441-4-maxime@cerno.tech> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210111142309.193441-1-maxime@cerno.tech> References: <20210111142309.193441-1-maxime@cerno.tech> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Dom Cobley The code prior to 311e305fdb4e ("drm/vc4: hdmi: Implement a register layout abstraction") was relying on the fact that the register offset was incremented by 4 for each readl call. That worked since the register width is 4 bytes. However, since that commit the HDMI_READ macro is now taking an enum, and the offset doesn't increment by 4 but 1 now. Divide the index by 4 to fix this. Fixes: 311e305fdb4e ("drm/vc4: hdmi: Implement a register layout abstraction") Reviewed-by: Dave Stevenson Signed-off-by: Dom Cobley Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hdmi.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index cb4594e7df6f..7945dbcee78c 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1443,13 +1443,20 @@ static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv) static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1) { + struct drm_device *dev = vc4_hdmi->connector.dev; struct cec_msg *msg = &vc4_hdmi->cec_rx_msg; unsigned int i; msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >> VC4_HDMI_CEC_REC_WRD_CNT_SHIFT); + + if (msg->len > 16) { + drm_err(dev, "Attempting to read too much data (%d)\n", msg->len); + return; + } + for (i = 0; i < msg->len; i += 4) { - u32 val = HDMI_READ(HDMI_CEC_RX_DATA_1 + i); + u32 val = HDMI_READ(HDMI_CEC_RX_DATA_1 + (i >> 2)); msg->msg[i] = val & 0xff; msg->msg[i + 1] = (val >> 8) & 0xff; @@ -1542,11 +1549,17 @@ static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, u32 signal_free_time, struct cec_msg *msg) { struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap); + struct drm_device *dev = vc4_hdmi->connector.dev; u32 val; unsigned int i; + if (msg->len > 16) { + drm_err(dev, "Attempting to transmit too much data (%d)\n", msg->len); + return -ENOMEM; + } + for (i = 0; i < msg->len; i += 4) - HDMI_WRITE(HDMI_CEC_TX_DATA_1 + i, + HDMI_WRITE(HDMI_CEC_TX_DATA_1 + (i >> 2), (msg->msg[i]) | (msg->msg[i + 1] << 8) | (msg->msg[i + 2] << 16) |