From mboxrd@z Thu Jan 1 00:00:00 1970 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 90E57C25B74 for ; Tue, 21 May 2024 13:36:14 +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:Message-ID:Date:References :In-Reply-To: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=0KKWd3jOI/WpqCLvXyyHQyX4OZ4g9eT3Q+0PGdU3Ygk=; b=0k2Z5VFafVeI6T yRd6BlDpXsEGFxPnTa3qEnhRWoJHHzKzESRl3FtZP8c09FNyOCnQRrAWi6hQZypvKrAZ3BnILIWse 6JPMP0mLbk5NKvJomcYIZDJwE3kav3cZ9rcxxArkfVpBAW6rpApMnyhFr6DY8nla9hgM7G3tl4z+K zIfH1GKToZcJQMHpOKdpLn35gmwoNKNIPdp6po7b+5momq+Gboj8K3aj6I7z8M+Fav3RLy627gfWG LroIHZJrEM1wvoOwlRj054kOy9YWd6AmOYoPQLqi8Wm6CznmSukytJtZGCRRxFi7HrytvlCpX+iV2 bf1xjip0xvHMPWF59aCQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s9Pem-0000000017q-2XtX; Tue, 21 May 2024 13:35:56 +0000 Received: from unicorn.mansr.com ([81.2.72.234]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s9Pei-0000000016r-4Bka for linux-arm-kernel@lists.infradead.org; Tue, 21 May 2024 13:35:54 +0000 Received: from raven.mansr.com (raven.mansr.com [IPv6:2001:8b0:ca0d:1::3]) by unicorn.mansr.com (Postfix) with ESMTPS id 5E1C915362; Tue, 21 May 2024 14:35:47 +0100 (BST) Received: by raven.mansr.com (Postfix, from userid 51770) id 4E7CB219E4D; Tue, 21 May 2024 14:35:47 +0100 (BST) From: =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= To: Frank Oltmanns Cc: Michael Turquette , Stephen Boyd , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Guido =?iso-8859-1?Q?G=FCnther?= , Purism Kernel Team , Ondrej Jirman , Neil Armstrong , Jessica Zhang , Sam Ravnborg , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v4 1/5] clk: sunxi-ng: common: Support minimum and maximum rate In-Reply-To: <20240310-pinephone-pll-fixes-v4-1-46fc80c83637@oltmanns.dev> (Frank Oltmanns's message of "Sun, 10 Mar 2024 14:21:11 +0100") References: <20240310-pinephone-pll-fixes-v4-0-46fc80c83637@oltmanns.dev> <20240310-pinephone-pll-fixes-v4-1-46fc80c83637@oltmanns.dev> Date: Tue, 21 May 2024 14:35:47 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.3 (gnu/linux) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240521_063553_200054_B22714B7 X-CRM114-Status: GOOD ( 21.03 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Frank Oltmanns writes: > The Allwinner SoC's typically have an upper and lower limit for their > clocks' rates. Up until now, support for that has been implemented > separately for each clock type. > > Implement that functionality in the sunxi-ng's common part making use of > the CCF rate liming capabilities, so that it is available for all clock > types. > > Suggested-by: Maxime Ripard > Signed-off-by: Frank Oltmanns > Cc: stable@vger.kernel.org > --- > drivers/clk/sunxi-ng/ccu_common.c | 19 +++++++++++++++++++ > drivers/clk/sunxi-ng/ccu_common.h | 3 +++ > 2 files changed, 22 insertions(+) This just landed in 6.6 stable, and it broke HDMI output on an A20 based device, the clocks ending up all wrong as seen in this diff of /sys/kernel/debug/clk/clk_summary: @@ -70,16 +71,14 @@ apb1-i2c0 0 0 0 24000000 = 0 = = = pll-gpu 0 0 0 1200000000 = 0 = - pll-video1 3 3 1 159000000 = 0 = + pll-video1 2 2 1 159000000 = 0 = hdmi 1 1 0 39750000 = 0 = = = tcon0-ch1-sclk2 1 1 1 39750000 = 0 = tcon0-ch1-sclk1 1 1 1 39750000 = 0 = = = - pll-video1-2x 1 1 0 318000000 = 0 = + pll-video1-2x 0 0 0 318000000 = 0 = = = - hdmi-tmds 2 2 0 39750000 = 0 = - hdmi-ddc 1 1 0 1987500 = 0 = pll-periph-base 2 2 0 1200000000 = 0 = mbus 1 1 0 300000000 = 0 = pll-periph-sata 0 0 0 100000000 = 0 = @@ -199,7 +198,7 @@ = = ace 0 0 0 384000000 = 0 = ve 0 0 0 384000000 = 0 = - pll-video0 4 4 2 297000000 = 0 = + pll-video0 5 5 2 297000000 = 0 = hdmi1 0 0 0 297000000 = 0 = tcon1-ch1-sclk2 0 0 0 297000000 = 0 = tcon1-ch1-sclk1 0 0 0 297000000 = 0 = @@ -222,8 +221,10 @@ = = de-be0 1 1 1 297000000 = 0 = = = - pll-video0-2x 0 0 0 594000000 = 0 = + pll-video0-2x 1 1 0 594000000 = 0 = = = + hdmi-tmds 2 2 0 594000000 = 0 = + hdmi-ddc 1 1 0 29700000 = 0 = pll-audio-base 0 0 0 1500000 = 0 = pll-audio-8x 0 0 0 3000000 = 0 = i2s2 0 0 0 3000000 = 0 = Reverting this commit makes it work again. > diff --git a/drivers/clk/sunxi-ng/ccu_common.c b/drivers/clk/sunxi-ng/ccu= _common.c > index 8babce55302f..ac0091b4ce24 100644 > --- a/drivers/clk/sunxi-ng/ccu_common.c > +++ b/drivers/clk/sunxi-ng/ccu_common.c > @@ -44,6 +44,16 @@ bool ccu_is_better_rate(struct ccu_common *common, > unsigned long current_rate, > unsigned long best_rate) > { > + unsigned long min_rate, max_rate; > + > + clk_hw_get_rate_range(&common->hw, &min_rate, &max_rate); > + > + if (current_rate > max_rate) > + return false; > + > + if (current_rate < min_rate) > + return false; > + > if (common->features & CCU_FEATURE_CLOSEST_RATE) > return abs(current_rate - target_rate) < abs(best_rate - target_rate); > > @@ -122,6 +132,7 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, str= uct device *dev, > > for (i =3D 0; i < desc->hw_clks->num ; i++) { > struct clk_hw *hw =3D desc->hw_clks->hws[i]; > + struct ccu_common *common =3D hw_to_ccu_common(hw); > const char *name; > > if (!hw) > @@ -136,6 +147,14 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, st= ruct device *dev, > pr_err("Couldn't register clock %d - %s\n", i, name); > goto err_clk_unreg; > } > + > + if (common->max_rate) > + clk_hw_set_rate_range(hw, common->min_rate, > + common->max_rate); > + else > + WARN(common->min_rate, > + "No max_rate, ignoring min_rate of clock %d - %s\n", > + i, name); > } > > ret =3D of_clk_add_hw_provider(node, of_clk_hw_onecell_get, > diff --git a/drivers/clk/sunxi-ng/ccu_common.h b/drivers/clk/sunxi-ng/ccu= _common.h > index 942a72c09437..329734f8cf42 100644 > --- a/drivers/clk/sunxi-ng/ccu_common.h > +++ b/drivers/clk/sunxi-ng/ccu_common.h > @@ -31,6 +31,9 @@ struct ccu_common { > u16 lock_reg; > u32 prediv; > > + unsigned long min_rate; > + unsigned long max_rate; > + > unsigned long features; > spinlock_t *lock; > struct clk_hw hw; > > -- = > > 2.44.0 > -- = M=E5ns Rullg=E5rd _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel