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Wed, 30 Sep 2020 10:08:00 -0400 (EDT) Date: Wed, 30 Sep 2020 16:07:58 +0200 From: Maxime Ripard To: Nathan Chancellor Cc: Nicolas Saenz Julienne , Eric Anholt , Stefan Wahren , Tim Gover , Dave Stevenson , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Hoegeun Kwon , Chanwoo Choi , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Phil Elwell , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v5 80/80] ARM: dts: bcm2711: Enable the display pipeline Message-ID: <20200930140758.gummt3umouva3wyu@gilmour.lan> References: <20200929221526.GA1370981@ubuntu-m3-large-x86> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nmd2zrhuwo3r2vsl" Content-Disposition: inline In-Reply-To: <20200929221526.GA1370981@ubuntu-m3-large-x86> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --nmd2zrhuwo3r2vsl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Nathan, On Tue, Sep 29, 2020 at 03:15:26PM -0700, Nathan Chancellor wrote: > On Thu, Sep 03, 2020 at 10:01:52AM +0200, Maxime Ripard wrote: > > Now that all the drivers have been adjusted for it, let's bring in the > > necessary device tree changes. > >=20 > > The VEC and PV3 are left out for now, since it will require a more spec= ific > > clock setup. > >=20 > > Reviewed-by: Dave Stevenson > > Tested-by: Chanwoo Choi > > Tested-by: Hoegeun Kwon > > Tested-by: Stefan Wahren > > Signed-off-by: Maxime Ripard >=20 > Apologies if this has already been reported or have a solution but this > patch (and presumably series) breaks output to the serial console after > a certain point during init. On Raspbian, I see systemd startup messages > then the output just turns into complete garbage. It looks like this > patch is merged first in linux-next, which is why my bisect fell on the > DRM merge. I am happy to provide whatever information could be helpful > for debugging this. I am on the latest version of the firmware > (currently 26620cc9a63c6cb9965374d509479b4ee2c30241). Unfortunately, the miniUART is in the same clock tree than the core clock and will thus have those kind of issues when the core clock is changed (which is also something that one should expect when using the DRM or other drivers). The only real workaround there would be to switch to one of the PL011 UARTs. I guess we can also somehow make the UART react to the core clock frequency changes, but that's going to require some effort Maxime --nmd2zrhuwo3r2vsl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCX3SRPgAKCRDj7w1vZxhR xSt+AP0ayZmAvs/uQrHYd/JCYiYkSNEVkD1lmyO4nYjMymxRSwEA8vrzDPVI/xKN 0eYP8+ZWTkPuacJT4sSnKcZCYSzHcwE= =YIDd -----END PGP SIGNATURE----- --nmd2zrhuwo3r2vsl-- 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 X-Spam-Level: X-Spam-Status: No, score=-7.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 813CEC4727E for ; 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Wed, 30 Sep 2020 10:08:00 -0400 (EDT) Date: Wed, 30 Sep 2020 16:07:58 +0200 From: Maxime Ripard To: Nathan Chancellor Subject: Re: [PATCH v5 80/80] ARM: dts: bcm2711: Enable the display pipeline Message-ID: <20200930140758.gummt3umouva3wyu@gilmour.lan> References: <20200929221526.GA1370981@ubuntu-m3-large-x86> MIME-Version: 1.0 In-Reply-To: <20200929221526.GA1370981@ubuntu-m3-large-x86> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200930_100805_491630_BEE6F328 X-CRM114-Status: GOOD ( 21.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Wahren , Chanwoo Choi , Tim Gover , Dave Stevenson , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Phil Elwell , Eric Anholt , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Hoegeun Kwon , Nicolas Saenz Julienne , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============2075357805114390675==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============2075357805114390675== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nmd2zrhuwo3r2vsl" Content-Disposition: inline --nmd2zrhuwo3r2vsl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Nathan, On Tue, Sep 29, 2020 at 03:15:26PM -0700, Nathan Chancellor wrote: > On Thu, Sep 03, 2020 at 10:01:52AM +0200, Maxime Ripard wrote: > > Now that all the drivers have been adjusted for it, let's bring in the > > necessary device tree changes. > >=20 > > The VEC and PV3 are left out for now, since it will require a more spec= ific > > clock setup. > >=20 > > Reviewed-by: Dave Stevenson > > Tested-by: Chanwoo Choi > > Tested-by: Hoegeun Kwon > > Tested-by: Stefan Wahren > > Signed-off-by: Maxime Ripard >=20 > Apologies if this has already been reported or have a solution but this > patch (and presumably series) breaks output to the serial console after > a certain point during init. On Raspbian, I see systemd startup messages > then the output just turns into complete garbage. It looks like this > patch is merged first in linux-next, which is why my bisect fell on the > DRM merge. I am happy to provide whatever information could be helpful > for debugging this. I am on the latest version of the firmware > (currently 26620cc9a63c6cb9965374d509479b4ee2c30241). Unfortunately, the miniUART is in the same clock tree than the core clock and will thus have those kind of issues when the core clock is changed (which is also something that one should expect when using the DRM or other drivers). The only real workaround there would be to switch to one of the PL011 UARTs. I guess we can also somehow make the UART react to the core clock frequency changes, but that's going to require some effort Maxime --nmd2zrhuwo3r2vsl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCX3SRPgAKCRDj7w1vZxhR xSt+AP0ayZmAvs/uQrHYd/JCYiYkSNEVkD1lmyO4nYjMymxRSwEA8vrzDPVI/xKN 0eYP8+ZWTkPuacJT4sSnKcZCYSzHcwE= =YIDd -----END PGP SIGNATURE----- --nmd2zrhuwo3r2vsl-- --===============2075357805114390675== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============2075357805114390675==-- 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 X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04C55C4727C for ; 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Wed, 30 Sep 2020 10:08:00 -0400 (EDT) Date: Wed, 30 Sep 2020 16:07:58 +0200 From: Maxime Ripard To: Nathan Chancellor Subject: Re: [PATCH v5 80/80] ARM: dts: bcm2711: Enable the display pipeline Message-ID: <20200930140758.gummt3umouva3wyu@gilmour.lan> References: <20200929221526.GA1370981@ubuntu-m3-large-x86> MIME-Version: 1.0 In-Reply-To: <20200929221526.GA1370981@ubuntu-m3-large-x86> X-Mailman-Approved-At: Thu, 01 Oct 2020 08:15:43 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Wahren , Chanwoo Choi , Tim Gover , Dave Stevenson , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Phil Elwell , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Hoegeun Kwon , Nicolas Saenz Julienne , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============1468379032==" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --===============1468379032== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nmd2zrhuwo3r2vsl" Content-Disposition: inline --nmd2zrhuwo3r2vsl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Nathan, On Tue, Sep 29, 2020 at 03:15:26PM -0700, Nathan Chancellor wrote: > On Thu, Sep 03, 2020 at 10:01:52AM +0200, Maxime Ripard wrote: > > Now that all the drivers have been adjusted for it, let's bring in the > > necessary device tree changes. > >=20 > > The VEC and PV3 are left out for now, since it will require a more spec= ific > > clock setup. > >=20 > > Reviewed-by: Dave Stevenson > > Tested-by: Chanwoo Choi > > Tested-by: Hoegeun Kwon > > Tested-by: Stefan Wahren > > Signed-off-by: Maxime Ripard >=20 > Apologies if this has already been reported or have a solution but this > patch (and presumably series) breaks output to the serial console after > a certain point during init. On Raspbian, I see systemd startup messages > then the output just turns into complete garbage. It looks like this > patch is merged first in linux-next, which is why my bisect fell on the > DRM merge. I am happy to provide whatever information could be helpful > for debugging this. I am on the latest version of the firmware > (currently 26620cc9a63c6cb9965374d509479b4ee2c30241). Unfortunately, the miniUART is in the same clock tree than the core clock and will thus have those kind of issues when the core clock is changed (which is also something that one should expect when using the DRM or other drivers). The only real workaround there would be to switch to one of the PL011 UARTs. I guess we can also somehow make the UART react to the core clock frequency changes, but that's going to require some effort Maxime --nmd2zrhuwo3r2vsl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCX3SRPgAKCRDj7w1vZxhR xSt+AP0ayZmAvs/uQrHYd/JCYiYkSNEVkD1lmyO4nYjMymxRSwEA8vrzDPVI/xKN 0eYP8+ZWTkPuacJT4sSnKcZCYSzHcwE= =YIDd -----END PGP SIGNATURE----- --nmd2zrhuwo3r2vsl-- --===============1468379032== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel --===============1468379032==--