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 761BFC021AD for ; Tue, 18 Feb 2025 14:59:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding: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=0vWS+jJLGaUznhkUfulRmF74wnw6+simbpz7/+3zlNU=; b=OqCKhB1mhhWYTN3Whwp8UUNIHk SoYWqTSO2YbX/GuxLHLkdSZ1JGJoXlv06i2eJBmNKNc+Q+waTtS1zGuwrxu5UGtg5ZGnkiz9zwICv hzkagkUE7JN2edkpcpLsvKULPDPG3ZF0RX4PDWdgnV1O8Idm1BefDvmIhP5NeEsSuAbFWU85xcypr 3BFCt3sJyrSRwA9c0nlbQ9n36tAr2q7PyOCK6HXUtm5NsBPLJx8IzQWDmDYCHCZRCil6N0Rs0QtC+ JrPYFSk52XaNgmjaFAnFWUVgo4wBda04SwRjFdaEwbUdcX4/lQLG/vwJQeGGuQvvmFdafmCjwcoB0 /eWl4TDw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tkP4Q-00000008f5a-13q2; Tue, 18 Feb 2025 14:59:34 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tkOyL-00000008dgt-19KB; Tue, 18 Feb 2025 14:53:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=0vWS+jJLGaUznhkUfulRmF74wnw6+simbpz7/+3zlNU=; b=yCHNif8/OzKbJ8qOOHLZC7ehTA zdS8Ay0sBcb8JU2WO/UQqqsK68gdfuNU0GOadhvfFzsvvbJjgwWUmCPjoLBXYXVCfWkAClMQ2hCMv PdJk1AYucpPORfkt3caFGB1hO1/Ovl8P1W76OSLXbFRg+M0bSYTBSMcERhZDq2L5JXKU6AM/yoWUU uTEM13NnKraf0E1QhGoPLP8LWNWELxhHs2WsPUkU9IuxgXJeHVDfBeueJ58YMIcabdv8YFa0LEgO0 6BUKBEGgN2ODQLuuVe4eto3M4Ba5Xjz4DZ7My9cqydE6khcMBrsiN1XNbTA8LYu8hQEmet7cmoGAW R4NEnpzg==; Received: from i53875bc0.versanet.de ([83.135.91.192] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1tkOyB-0005uw-A9; Tue, 18 Feb 2025 15:53:07 +0100 From: Heiko =?UTF-8?B?U3TDvGJuZXI=?= To: Jianfeng Liu , Sebastian Reichel Cc: airlied@gmail.com, andy.yan@rock-chips.com, conor+dt@kernel.org, cristian.ciocaltea@collabora.com, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, hjc@rock-chips.com, kernel@collabora.com, krzk+dt@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, robh@kernel.org, simona@ffwll.ch, tzimmermann@suse.de Subject: Re: [PATCH 3/4] arm64: dts: rockchip: Add HDMI1 PHY PLL clock source to VOP2 on RK3588 Date: Tue, 18 Feb 2025 15:53:06 +0100 Message-ID: <2425191.NG923GbCHz@diego> In-Reply-To: References: <1919367.CQOukoFCf9@diego> <20250218121749.1382322-1-liujianfeng1994@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250218_065317_306424_43337B2A X-CRM114-Status: GOOD ( 34.19 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am Dienstag, 18. Februar 2025, 15:13:07 MEZ schrieb Sebastian Reichel: > Hi, >=20 > On Tue, Feb 18, 2025 at 08:17:46PM +0800, Jianfeng Liu wrote: > > On Tue, 18 Feb 2025 11:00:57 +0100, Heiko St=C3=BCbnerwrote: > > >So I guess step1, check what error is actually returned. > >=20 > > I have checked that the return value is -517: > >=20 > > rockchip-drm display-subsystem: [drm] *ERROR* failed to get pll_hdmiphy= 1 with -517 > >=20 > > >Step2 check if clk_get_optional need to be adapted or alternatively > > >catch the error in the vop2 and set the clock to NULL ourself in that = case. > >=20 > > I tried the following patch to set the clock to NULL when clk_get_optio= nal > > failed with value -517, and hdmi0 is working now. There are also some > > boards like rock 5 itx which only use hdmi1, I think we should also add > > this logic to vop2->pll_hdmiphy0. > >=20 > > @@ -3733,6 +3751,15 @@ static int vop2_bind(struct device *dev, struct = device *master, void *data) > > return PTR_ERR(vop2->pll_hdmiphy0); > > } > > =20 > > + vop2->pll_hdmiphy1 =3D devm_clk_get_optional(vop2->dev, "pll_hdmiphy1= "); > > + if (IS_ERR(vop2->pll_hdmiphy1)) { > > + drm_err(vop2->drm, "failed to get pll_hdmiphy1 with %d\n", vop2->pll= _hdmiphy1); > > + if (vop2->pll_hdmiphy1 =3D=3D -EPROBE_DEFER) > > + vop2->pll_hdmiphy1 =3D NULL; > > + else > > + return PTR_ERR(vop2->pll_hdmiphy1); > > + } > > + >=20 > This first of all shows, that we should replace drm_err in this > place with dev_err_probe(), which hides -EPROBE_DEFER errors by > default and instead captures the reason for /sys/kernel/debug/devices_def= erred. >=20 > Second what you are doing in the above suggestion will break kernel > configurations where VOP is built-in and the HDMI PHY is build as a > module. >=20 > But I also think it would be better to have the clocks defined in the > SoC level DT. I suppose that means vop2_bind would have to check if > the HDMI controller is enabled and only requests pll_hdmiphy > based on that. Considering there is the OF graph pointing from VOP > to the enabled HDMI controllers, it should be able to do that. I was more thinking about fixing the correct thing, with something like: =2D---------- 8< ---------- diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index cf7720b9172f..50faafbf5dda 100644 =2D-- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -5258,6 +5258,10 @@ of_clk_get_hw_from_clkspec(struct of_phandle_args *c= lkspec) if (!clkspec) return ERR_PTR(-EINVAL); + /* Check if node in clkspec is in disabled/fail state */ + if (!of_device_is_available(clkspec->np)) + return ERR_PTR(-ENOENT); + mutex_lock(&of_clk_mutex); list_for_each_entry(provider, &of_clk_providers, link) { if (provider->node =3D=3D clkspec->np) { =2D---------- 8< ---------- Because right now the clk framework does not handle nodes in failed/disabled state and would defer indefinitly. 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charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org QW0gRGllbnN0YWcsIDE4LiBGZWJydWFyIDIwMjUsIDE1OjEzOjA3IE1FWiBzY2hyaWViIFNlYmFz dGlhbiBSZWljaGVsOgo+IEhpLAo+IAo+IE9uIFR1ZSwgRmViIDE4LCAyMDI1IGF0IDA4OjE3OjQ2 UE0gKzA4MDAsIEppYW5mZW5nIExpdSB3cm90ZToKPiA+IE9uIFR1ZSwgMTggRmViIDIwMjUgMTE6 MDA6NTcgKzAxMDAsIEhlaWtvIFN0w7xibmVyd3JvdGU6Cj4gPiA+U28gSSBndWVzcyBzdGVwMSwg Y2hlY2sgd2hhdCBlcnJvciBpcyBhY3R1YWxseSByZXR1cm5lZC4KPiA+IAo+ID4gSSBoYXZlIGNo ZWNrZWQgdGhhdCB0aGUgcmV0dXJuIHZhbHVlIGlzIC01MTc6Cj4gPiAKPiA+IHJvY2tjaGlwLWRy bSBkaXNwbGF5LXN1YnN5c3RlbTogW2RybV0gKkVSUk9SKiBmYWlsZWQgdG8gZ2V0IHBsbF9oZG1p cGh5MSB3aXRoIC01MTcKPiA+IAo+ID4gPlN0ZXAyIGNoZWNrIGlmIGNsa19nZXRfb3B0aW9uYWwg bmVlZCB0byBiZSBhZGFwdGVkIG9yIGFsdGVybmF0aXZlbHkKPiA+ID5jYXRjaCB0aGUgZXJyb3Ig aW4gdGhlIHZvcDIgYW5kIHNldCB0aGUgY2xvY2sgdG8gTlVMTCBvdXJzZWxmIGluIHRoYXQgY2Fz ZS4KPiA+IAo+ID4gSSB0cmllZCB0aGUgZm9sbG93aW5nIHBhdGNoIHRvIHNldCB0aGUgY2xvY2sg dG8gTlVMTCB3aGVuIGNsa19nZXRfb3B0aW9uYWwKPiA+IGZhaWxlZCB3aXRoIHZhbHVlIC01MTcs IGFuZCBoZG1pMCBpcyB3b3JraW5nIG5vdy4gVGhlcmUgYXJlIGFsc28gc29tZQo+ID4gYm9hcmRz IGxpa2Ugcm9jayA1IGl0eCB3aGljaCBvbmx5IHVzZSBoZG1pMSwgSSB0aGluayB3ZSBzaG91bGQg YWxzbyBhZGQKPiA+IHRoaXMgbG9naWMgdG8gdm9wMi0+cGxsX2hkbWlwaHkwLgo+ID4gCj4gPiBA QCAtMzczMyw2ICszNzUxLDE1IEBAIHN0YXRpYyBpbnQgdm9wMl9iaW5kKHN0cnVjdCBkZXZpY2Ug KmRldiwgc3RydWN0IGRldmljZSAqbWFzdGVyLCB2b2lkICpkYXRhKQo+ID4gIAkJcmV0dXJuIFBU Ul9FUlIodm9wMi0+cGxsX2hkbWlwaHkwKTsKPiA+ICAJfQo+ID4gIAo+ID4gKwl2b3AyLT5wbGxf aGRtaXBoeTEgPSBkZXZtX2Nsa19nZXRfb3B0aW9uYWwodm9wMi0+ZGV2LCAicGxsX2hkbWlwaHkx Iik7Cj4gPiArCWlmIChJU19FUlIodm9wMi0+cGxsX2hkbWlwaHkxKSkgewo+ID4gKwkJZHJtX2Vy cih2b3AyLT5kcm0sICJmYWlsZWQgdG8gZ2V0IHBsbF9oZG1pcGh5MSB3aXRoICVkXG4iLCB2b3Ay LT5wbGxfaGRtaXBoeTEpOwo+ID4gKwkJaWYgKHZvcDItPnBsbF9oZG1pcGh5MSA9PSAtRVBST0JF X0RFRkVSKQo+ID4gKwkJCXZvcDItPnBsbF9oZG1pcGh5MSA9IE5VTEw7Cj4gPiArCQllbHNlCj4g PiArCQkJcmV0dXJuIFBUUl9FUlIodm9wMi0+cGxsX2hkbWlwaHkxKTsKPiA+ICsJfQo+ID4gKwo+ IAo+IFRoaXMgZmlyc3Qgb2YgYWxsIHNob3dzLCB0aGF0IHdlIHNob3VsZCByZXBsYWNlIGRybV9l cnIgaW4gdGhpcwo+IHBsYWNlIHdpdGggZGV2X2Vycl9wcm9iZSgpLCB3aGljaCBoaWRlcyAtRVBS T0JFX0RFRkVSIGVycm9ycyBieQo+IGRlZmF1bHQgYW5kIGluc3RlYWQgY2FwdHVyZXMgdGhlIHJl YXNvbiBmb3IgL3N5cy9rZXJuZWwvZGVidWcvZGV2aWNlc19kZWZlcnJlZC4KPiAKPiBTZWNvbmQg d2hhdCB5b3UgYXJlIGRvaW5nIGluIHRoZSBhYm92ZSBzdWdnZXN0aW9uIHdpbGwgYnJlYWsga2Vy bmVsCj4gY29uZmlndXJhdGlvbnMgd2hlcmUgVk9QIGlzIGJ1aWx0LWluIGFuZCB0aGUgSERNSSBQ SFkgaXMgYnVpbGQgYXMgYQo+IG1vZHVsZS4KPiAKPiBCdXQgSSBhbHNvIHRoaW5rIGl0IHdvdWxk IGJlIGJldHRlciB0byBoYXZlIHRoZSBjbG9ja3MgZGVmaW5lZCBpbiB0aGUKPiBTb0MgbGV2ZWwg RFQuIEkgc3VwcG9zZSB0aGF0IG1lYW5zIHZvcDJfYmluZCB3b3VsZCBoYXZlIHRvIGNoZWNrIGlm Cj4gdGhlIEhETUkgY29udHJvbGxlciA8SUQ+IGlzIGVuYWJsZWQgYW5kIG9ubHkgcmVxdWVzdHMg cGxsX2hkbWlwaHk8SUQ+Cj4gYmFzZWQgb24gdGhhdC4gQ29uc2lkZXJpbmcgdGhlcmUgaXMgdGhl IE9GIGdyYXBoIHBvaW50aW5nIGZyb20gVk9QCj4gdG8gdGhlIGVuYWJsZWQgSERNSSBjb250cm9s bGVycywgaXQgc2hvdWxkIGJlIGFibGUgdG8gZG8gdGhhdC4KCgpJIHdhcyBtb3JlIHRoaW5raW5n IGFib3V0IGZpeGluZyB0aGUgY29ycmVjdCB0aGluZywgd2l0aCBzb21ldGhpbmcgbGlrZToKCi0t LS0tLS0tLS0tIDg8IC0tLS0tLS0tLS0KZGlmZiAtLWdpdCBhL2RyaXZlcnMvY2xrL2Nsay5jIGIv ZHJpdmVycy9jbGsvY2xrLmMKaW5kZXggY2Y3NzIwYjkxNzJmLi41MGZhYWZiZjVkZGEgMTAwNjQ0 Ci0tLSBhL2RyaXZlcnMvY2xrL2Nsay5jCisrKyBiL2RyaXZlcnMvY2xrL2Nsay5jCkBAIC01MjU4 LDYgKzUyNTgsMTAgQEAgb2ZfY2xrX2dldF9od19mcm9tX2Nsa3NwZWMoc3RydWN0IG9mX3BoYW5k bGVfYXJncyAqY2xrc3BlYykKICAgICAgICBpZiAoIWNsa3NwZWMpCiAgICAgICAgICAgICAgICBy ZXR1cm4gRVJSX1BUUigtRUlOVkFMKTsKCisgICAgICAgLyogQ2hlY2sgaWYgbm9kZSBpbiBjbGtz cGVjIGlzIGluIGRpc2FibGVkL2ZhaWwgc3RhdGUgKi8KKyAgICAgICBpZiAoIW9mX2RldmljZV9p c19hdmFpbGFibGUoY2xrc3BlYy0+bnApKQorICAgICAgICAgICAgICAgcmV0dXJuIEVSUl9QVFIo LUVOT0VOVCk7CisKICAgICAgICBtdXRleF9sb2NrKCZvZl9jbGtfbXV0ZXgpOwogICAgICAgIGxp c3RfZm9yX2VhY2hfZW50cnkocHJvdmlkZXIsICZvZl9jbGtfcHJvdmlkZXJzLCBsaW5rKSB7CiAg ICAgICAgICAgICAgICBpZiAocHJvdmlkZXItPm5vZGUgPT0gY2xrc3BlYy0+bnApIHsKLS0tLS0t LS0tLS0gODwgLS0tLS0tLS0tLQoKQmVjYXVzZSByaWdodCBub3cgdGhlIGNsayBmcmFtZXdvcmsg ZG9lcyBub3QgaGFuZGxlIG5vZGVzIGluCmZhaWxlZC9kaXNhYmxlZCBzdGF0ZSBhbmQgd291bGQg ZGVmZXIgaW5kZWZpbml0bHkuCgoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpMaW51eC1yb2NrY2hpcCBtYWlsaW5nIGxpc3QKTGludXgtcm9ja2NoaXBA bGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2xpbnV4LXJvY2tjaGlwCg==