From patchwork Sun Oct 23 19:11:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 9391183 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DFB0960762 for ; Sun, 23 Oct 2016 19:15:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF32028B53 for ; Sun, 23 Oct 2016 19:15:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C158028B56; Sun, 23 Oct 2016 19:15:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6758928B53 for ; Sun, 23 Oct 2016 19:15:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1byODJ-0004WH-Hk; Sun, 23 Oct 2016 19:13:45 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1byOBD-0002uy-FZ for linux-arm-kernel@lists.infradead.org; Sun, 23 Oct 2016 19:11:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:To:From:References:In-Reply-To; bh=WuiZ++/PykQlmplgsTM2A7ysndrtlX9dnbODqq5+1KI=; b=mw9Y+qhpAuTmCdKfCvwrLqQAZ9KqEM3wqHAvnO5DBv2jTaM5GRLTUEUgmZyL1V3iiJcJLyN5zjJpLMtJAY/lAvKlbxxo95Umw+W+ILeQ6WaFUZKRdLECxe/LPfF9flW9+PY31ZcHCcW2ExutDJ5ub2Tc7vCAr55QFyh0peDvI0Q=; Received: from e0022681537dd.dyn.armlinux.org.uk ([2001:4d48:ad52:3201:222:68ff:fe15:37dd]:35470 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1byOAp-0001mC-QR; Sun, 23 Oct 2016 20:11:11 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1byOAn-0005zM-WF; Sun, 23 Oct 2016 20:11:10 +0100 In-Reply-To: <20161023191002.GJ1041@n2100.armlinux.org.uk> References: <20161023191002.GJ1041@n2100.armlinux.org.uk> From: Russell King To: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC 09/10] drm/i2c: tda998x: remove complexity from tda998x_audio_get_eld() MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Sun, 23 Oct 2016 20:11:10 +0100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161023_121136_129314_731CA990 X-CRM114-Status: GOOD ( 11.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP tda998x_audio_get_eld() is needlessly complex - the connector associated with the encoder is always our own priv->connector. Remove this complexity, but ensure that there are no races when copying out the ELD. Signed-off-by: Russell King --- drivers/gpu/drm/i2c/tda998x_drv.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index 6a7095b66a69..547cf99ac32d 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -911,21 +911,13 @@ static int tda998x_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len) { struct tda998x_priv *priv = dev_get_drvdata(dev); - struct drm_mode_config *config = &priv->encoder.dev->mode_config; - struct drm_connector *connector; - int ret = -ENODEV; - - mutex_lock(&config->mutex); - list_for_each_entry(connector, &config->connector_list, head) { - if (&priv->encoder == connector->encoder) { - memcpy(buf, connector->eld, - min(sizeof(connector->eld), len)); - ret = 0; - } - } - mutex_unlock(&config->mutex); - return ret; + mutex_lock(&priv->audio_mutex); + memcpy(buf, priv->connector.eld, + min(sizeof(priv->connector.eld), len)); + mutex_unlock(&priv->audio_mutex); + + return 0; } static const struct hdmi_codec_ops audio_codec_ops = { @@ -1082,7 +1074,10 @@ static int tda998x_connector_get_modes(struct drm_connector *connector) drm_mode_connector_update_edid_property(connector, edid); n = drm_add_edid_modes(connector, edid); priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid); + + mutex_lock(&priv->audio_mutex); drm_edid_to_eld(connector, edid); + mutex_unlock(&priv->audio_mutex); kfree(edid);