From patchwork Thu Feb 16 10:24:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 13142836 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D39CFC636CC for ; Thu, 16 Feb 2023 10:25:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=liaOT6bZloG/qEqn3fsWDR3+0XMq9ri6L8ACfIj9oaY=; b=nHk9wtDPD295PZ 0ptDwmoZP+wWCtkRqESHfe9UWf7Wu49rFCj1ZQDLtEHXch4QkHUW5leJ3Mj9xfnei0NxtoRMluBAx 8QGV+95u/vWOTeJ0BUv0jNKDhNsOTAJ+njWo+UwOqAaUoSgiILNRADPCBne9hgceBDBGZJeuat0IC gPU5rTTPP+Yg8FgM57vrKR6dVy+riGihdcvDR/Tg5jYgU04sOUOrmYhEKviUGo9XMMbRmVR8AK/jU gUIIBefxO4cVFk7uRTtotS72nv42Spn1qm3Op7MrjhBmtFLFaAsvy2Usy6MYnQapcfs9hTEeGoPIp nbOHD4eMdZ//mFPRNnUg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pSbSG-009YGm-D3; Thu, 16 Feb 2023 10:25:32 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pSbSC-009YDX-Ql for linux-rockchip@lists.infradead.org; Thu, 16 Feb 2023 10:25:30 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pSbRd-0001Qk-Od; Thu, 16 Feb 2023 11:24:53 +0100 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1pSbRY-005Kiy-N5; Thu, 16 Feb 2023 11:24:49 +0100 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1pSbRY-002Sfn-RS; Thu, 16 Feb 2023 11:24:48 +0100 From: Sascha Hauer To: dri-devel@lists.freedesktop.org Cc: Sandy Huang , linux-rockchip@lists.infradead.org, Michael Riesch , kernel@pengutronix.de, Robin Murphy , Dan Johansen , FUKAUMI Naoki , Sascha Hauer , Nicolas Frattaroli Subject: [PATCH v6 4/4] drm/rockchip: dw_hdmi: discard modes with unachievable pixelclocks Date: Thu, 16 Feb 2023 11:24:47 +0100 Message-Id: <20230216102447.582905-5-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230216102447.582905-1-s.hauer@pengutronix.de> References: <20230216102447.582905-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-rockchip@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230216_022528_911736_D15BA2D3 X-CRM114-Status: GOOD ( 12.72 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org The Rockchip PLL drivers are currently table based and support only the most common pixelclocks. Discard all modes we cannot achieve at all. Normally the desired pixelclocks have an exact match in the PLL driver, nevertheless allow for a 0.1% error just in case. Tested-by: Nicolas Frattaroli Tested-by: Michael Riesch Tested-by: Dan Johansen Link: https://lore.kernel.org/r/20230118132213.2911418-4-s.hauer@pengutronix.de Signed-off-by: Sascha Hauer --- Notes: Changes since v3: - only check for rate when clk != NULL Changes since v2: - new patch drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index feba6b9becd6c..293dcf0f05931 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -260,6 +260,13 @@ dw_hdmi_rockchip_mode_valid(struct dw_hdmi *dw_hdmi, void *data, bool exact_match = hdmi->plat_data->phy_force_vendor; int i; + if (hdmi->ref_clk) { + int rpclk = clk_round_rate(hdmi->ref_clk, pclk); + + if (abs(rpclk - pclk) > pclk / 1000) + return MODE_NOCLOCK; + } + for (i = 0; mpll_cfg[i].mpixelclock != (~0UL); i++) { /* * For vendor specific phys force an exact match of the pixelclock