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[2003:e4:1f2d:4600:f22f:74ff:fe1f:3a53]) by smtp.gmail.com with ESMTPSA id sn24-20020a170906629800b00a3e1939b23bsm5826313ejc.127.2024.02.22.10.06.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Feb 2024 10:06:11 -0800 (PST) Content-Type: multipart/signed; boundary=4a659079f1e590d675fd8e64a35f402ed1085394e8a76e8a2114007e0625; micalg=pgp-sha256; protocol="application/pgp-signature" Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Date: Thu, 22 Feb 2024 19:06:11 +0100 Message-Id: Subject: Re: [PATCH] gpu: host1x: Skip reset assert on Tegra186 From: "Thierry Reding" To: "Mikko Perttunen" Cc: "Mikko Perttunen" , , X-Mailer: aerc 0.16.0-1-0-g560d6168f0ed-dirty References: <20240222010517.1573931-1-cyndis@kapsi.fi> In-Reply-To: <20240222010517.1573931-1-cyndis@kapsi.fi> --4a659079f1e590d675fd8e64a35f402ed1085394e8a76e8a2114007e0625 Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 On Thu Feb 22, 2024 at 2:05 AM CET, Mikko Perttunen wrote: > From: Mikko Perttunen > > On Tegra186, secure world applications may need to access host1x > during suspend/resume, and rely on the kernel to keep Host1x out > of reset during the suspend cycle. As such, as a quirk, > skip asserting Host1x's reset on Tegra186. > > We don't need to keep the clocks enabled, as BPMP ensures the clock > stays on while Host1x is being used. On newer SoC's, the reset line > is inaccessible, so there is no need for the quirk. > > Signed-off-by: Mikko Perttunen > --- > drivers/gpu/host1x/dev.c | 15 +++++++++------ > drivers/gpu/host1x/dev.h | 6 ++++++ > 2 files changed, 15 insertions(+), 6 deletions(-) Applied to drm-misc-fixes, though I added the Fixes: tag that Jon mentioned in reply to v1 of this as well as his Reviewed-by and Tested-by as well, since this is pretty much the same patch except for the comments. 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