From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 02 Jun 2026 09:05:48 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wUJC8-001Uzp-03 for lore@lore.pengutronix.de; Tue, 02 Jun 2026 09:05:48 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wUJC7-0007x7-CE for lore@pengutronix.de; Tue, 02 Jun 2026 09:05:47 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jJgGqsS7eK8fSziYDooGNItXt6GzlcnACbvmAgnrAN0=; b=UvS1JIfn6SmhRAo29VFKCG2+aW pWmd85095+PCShsuqDP++WosrdHdnkM62qPqD35W+HCyMMLuDzLqTkZliWTjbL2j95WEJIlJb5Cn3 QqF7GFATA84POboQEHtVpKgA2Ogex13xI01eODYX5N68DH6LFFrh8m1JYbqlC6GLsuTPeUA/hKdc6 vunPMPGqOeg4vTfRzp0uXzRd+xujS72+9IoVDYFqtWbcLDUA7CVU+u9tnrHgZmzUbpntDroAzSbuB K/1awisXBD166n+4FsPX6iJF9733ejIaL/JyBL93NZ7KLxwbkeaP1I6W5xqGWVNOpef/lOicfs67i lFg5dnpg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wUJAy-0000000CQMo-0Q3U; Tue, 02 Jun 2026 07:04:36 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wUJAv-0000000CQMF-1bfz for barebox@lists.infradead.org; Tue, 02 Jun 2026 07:04:34 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wUJAt-0007pZ-Iy; Tue, 02 Jun 2026 09:04:31 +0200 Message-ID: <9b1495fe-24db-440b-bee7-be86a00e8fb4@pengutronix.de> Date: Tue, 2 Jun 2026 09:04:31 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Johannes Schneider , barebox@lists.infradead.org Cc: thomas.haemmerle@leica-geosystems.com References: <20260602040953.1060278-1-johannes.schneider@leica-geosystems.com> <20260602040953.1060278-2-johannes.schneider@leica-geosystems.com> From: Ahmad Fatoum Content-Language: en-US, de-DE, de-BE In-Reply-To: <20260602040953.1060278-2-johannes.schneider@leica-geosystems.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260602_000433_487286_65FC3C2D X-CRM114-Status: GOOD ( 16.28 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 1/6] clk: imx8mp: add 700 MHz rate entry for VIDEO_PLL1 X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On 6/2/26 6:09 AM, Johannes Schneider wrote: > From: Thomas Haemmerle > > The LVDS serializer requires link_freq = pixel_clock × 7. For a 25 MHz > pixel clock the link frequency is 175 MHz. VIDEO_PLL1 must be set to > 700 MHz so the divider chain (VIDEO_PLL1 / 4 = 175 MHz) produces an > exact match; without it clk_set_rate() rounds down to 650 MHz, yielding > only 162.5 MHz and causing the LVDS transmitter to output ~743 pixels > per line instead of 800 — visible as a black strip on the right edge. > > PLL parameters: Fin=24 MHz, P=3, S=2, K=0 → 24 × 350 / (3 × 4) = 700 MHz. > > Assisted-by: Claude:claude-sonnet-4-6 > Signed-of-by: Thomas Haemmerle Reviewed-by: Ahmad Fatoum > --- > drivers/clk/imx/clk-pll14xx.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c > index 6716a6f555..db7e744e87 100644 > --- a/drivers/clk/imx/clk-pll14xx.c > +++ b/drivers/clk/imx/clk-pll14xx.c > @@ -61,6 +61,7 @@ static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = { > }; > > static const struct imx_pll14xx_rate_table imx_pll1443x_tbl[] = { > + PLL_1443X_RATE(700000000U, 350, 3, 2, 0), > PLL_1443X_RATE(650000000U, 325, 3, 2, 0), > PLL_1443X_RATE(594000000U, 198, 2, 2, 0), > PLL_1443X_RATE(393216000U, 262, 2, 3, 9437), > > base-commit: 81fbe2e8d0d445032498a0bfecf9fd270f00985a -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |