From patchwork Tue Sep 17 13:07:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrizio Castro X-Patchwork-Id: 11148791 X-Patchwork-Delegate: iwamatsu@nigauri.org Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D6CB376 for ; Tue, 17 Sep 2019 13:09:06 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BD6E3214AF for ; Tue, 17 Sep 2019 13:09:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD6E3214AF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bp.renesas.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=cip-dev-bounces@lists.cip-project.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id C0F6314E8; Tue, 17 Sep 2019 13:08:24 +0000 (UTC) X-Original-To: cip-dev@lists.cip-project.org Delivered-To: cip-dev@mail.linuxfoundation.org Received: from smtp2.linuxfoundation.org (smtp2.linux-foundation.org [172.17.192.36]) by mail.linuxfoundation.org (Postfix) with ESMTPS id C7FDB14DE for ; Tue, 17 Sep 2019 13:08:23 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp2.linuxfoundation.org (Postfix) with ESMTP id 4C3611DDC8 for ; Tue, 17 Sep 2019 13:08:23 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.64,516,1559487600"; d="scan'208";a="26794906" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 17 Sep 2019 22:08:23 +0900 Received: from fabrizio-dev.ree.adwin.renesas.com (unknown [10.226.36.196]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id B09EE40065B7; Tue, 17 Sep 2019 22:08:21 +0900 (JST) From: Fabrizio Castro To: cip-dev@lists.cip-project.org Date: Tue, 17 Sep 2019 14:07:39 +0100 Message-Id: <1568725680-32730-12-git-send-email-fabrizio.castro@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1568725680-32730-1-git-send-email-fabrizio.castro@bp.renesas.com> References: <1568725680-32730-1-git-send-email-fabrizio.castro@bp.renesas.com> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp2.linux-foundation.org Cc: Biju Das Subject: [cip-dev] [PATCH 4.19.y-cip v2 11/32] drm: rcar-du: dw-hdmi: Reject modes with a too high clock frequency X-BeenThere: cip-dev@lists.cip-project.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: cip-dev-bounces@lists.cip-project.org Errors-To: cip-dev-bounces@lists.cip-project.org From: Laurent Pinchart commit f41cb153e6faf0d1f4bbe0b0f15aa20de1e43e90 upstream. Implement a .mode_valid() handler in the R-Car glue layer to reject modes with an unsupported clock frequency. Signed-off-by: Laurent Pinchart Reviewed-by: Kieran Bingham Signed-off-by: Fabrizio Castro --- drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c index 76210ae..8e6abe8 100644 --- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c +++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c @@ -39,6 +39,20 @@ static const struct rcar_hdmi_phy_params rcar_hdmi_phy_params[] = { { ~0UL, 0x0000, 0x0000, 0x0000 }, }; +static enum drm_mode_status +rcar_hdmi_mode_valid(struct drm_connector *connector, + const struct drm_display_mode *mode) +{ + /* + * The maximum supported clock frequency is 297 MHz, as shown in the PHY + * parameters table. + */ + if (mode->clock > 297000) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi, const struct dw_hdmi_plat_data *pdata, unsigned long mpixelclock) @@ -63,6 +77,7 @@ static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi, } static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = { + .mode_valid = rcar_hdmi_mode_valid, .configure_phy = rcar_hdmi_phy_configure, };