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Wed, 04 Nov 2026 11:50:37 -0800 (PST) Received: from localhost ([2001:4090:a244:81d0:bc85:7836:468a:a1a8]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48fed5538basm5325940f8f.44.2026.11.04.11.50.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Nov 2026 11:50:36 -0800 (PST) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 Content-Type: multipart/signed; boundary=ee0b8d44e90725828066b8930e0f6189120bcd9f47cbb7b5da9d5a8229c3; micalg=pgp-sha512; protocol="application/pgp-signature" Date: Wed, 04 Nov 2026 20:50:28 +0100 Message-Id: Cc: "Vinod Koul" , "Frank Li" , "Tony Lindgren" , "Daniel Mack" , , , "Julien Panis" , "Mendez, Judith" , "Francis, Sebin" , Subject: Re: [PATCH 1/4] dmaengine: ti: cppi41: Use td_queue to restore DMA_TDFDQ From: "Markus Schneider-Pargmann" To: "Frank Li" , "Markus Schneider-Pargmann (TI)" X-Mailer: aerc 0.21.0-146-gb5c16ebe1835 References: <20261103-v7-3-topic-am335lpm-cppi41-v1-0-d7213446c5f5@baylibre.com> <20261103-v7-3-topic-am335lpm-cppi41-v1-1-d7213446c5f5@baylibre.com> In-Reply-To: --ee0b8d44e90725828066b8930e0f6189120bcd9f47cbb7b5da9d5a8229c3 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 On Wed Nov 4, 2026 at 6:42 PM CET, Frank Li wrote: > On Tue, Nov 03, 2026 at 08:37:28PM +0100, Markus Schneider-Pargmann (TI) = wrote: >> [You don't often get email from msp@baylibre.com. Learn why this is impo= rtant at https://aka.ms/LearnAboutSenderIdentification ] >> >> In init_cppi41() td_queue.submit is used to setup DMA_TDFDQ. In >> suspend/resume the same value is read, stored and restored. >> >> To get rid of the suspend register access, use td_queue.submit in resume >> as well to restore the value. >> >> Cc: stable@vger.kernel.org > > Do you fix some problem? why only have cc stable without fixes tag? This in itself does not fix an issue. But without removing the register read in suspend the follow up patch would not be enough to make it work. Best Markus --ee0b8d44e90725828066b8930e0f6189120bcd9f47cbb7b5da9d5a8229c3 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iKMEABYKAEsWIQSJYVVm/x+5xmOiprOFwVZpkBVKUwUCauuMhRsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIRHG1zcEBiYXlsaWJyZS5jb20ACgkQhcFWaZAVSlOZ tQEAk5I87cijSBP2K97rUA3N6Qdsw4NGsd6NwNNQXdTFSOEA/Ay25+LZG9HzW52x Y0gRoHYQHeAJZpoTQz9sRHXM0LwE =sNxU -----END PGP SIGNATURE----- --ee0b8d44e90725828066b8930e0f6189120bcd9f47cbb7b5da9d5a8229c3--