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boundary="------------poELg2Zuwoc70o0tkSgJRX1O"; protected-headers="v1" From: Matt Coster To: Conor Dooley Cc: Frank Binns , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Randolph Sapp , Darren Etheridge Message-ID: <5e26957f-dc79-42ef-a8a1-597fb386ae51@imgtec.com> Subject: Re: [PATCH 04/21] dt-bindings: gpu: img: Allow dma-coherent References: <20241105-sets-bxs-4-64-patch-v1-v1-0-4ed30e865892@imgtec.com> <20241105-sets-bxs-4-64-patch-v1-v1-4-4ed30e865892@imgtec.com> <20241105-linseed-steadfast-98cd8abe898c@spud> In-Reply-To: <20241105-linseed-steadfast-98cd8abe898c@spud> --------------poELg2Zuwoc70o0tkSgJRX1O Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 05/11/2024 18:06, Conor Dooley wrote: > On Tue, Nov 05, 2024 at 03:58:10PM +0000, Matt Coster wrote: >> This attribute will be required for the BXS-4-64 MC1 and will be enabl= ed in >> the DTS for the TI k3-j721s2 in a subsequent patch; add it now so >> dtbs_check doesn't complain later. >=20 > Sounds like the property should be made required for that integration. This is something I went back and forth on. Where is the line drawn between things that should be enforced in bindings and things that only ever need to be specified once, so should just be left to the dt itself to be the source of truth? Having said that, I realise TI could spin a new SoC with a new dt but use the same compatible string for the GPU; the "single" source of truth then wouldn't be so single anymore. I guess by making this property required for this compatible string, we're saying any use of it must behave in exactly the same way, right? Cheers, Matt >> Signed-off-by: Matt Coster >> --- >> Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.y= aml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml >> index 55f422be1bc5b7564e3e81f24c4b93857f3e12fe..8a1861ca960c48853b2cee= f414f588cc343b49b2 100644 >> --- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml >> +++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml >> @@ -60,6 +60,8 @@ properties: >> - const: a >> - const: b >> =20 >> + dma-coherent: true >> + >> required: >> - compatible >> - reg >> >> --=20 >> 2.47.0 >> --=20 Matt Coster E: matt.coster@imgtec.com --------------poELg2Zuwoc70o0tkSgJRX1O-- --------------8C14MFx8e9mKU6xhHhB07iKO Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wnsEABYIACMWIQS4qDmoJvwmKhjY+nN5vBnz2d5qsAUCZytCXQUDAAAAAAAKCRB5vBnz2d5qsLuG APsFtLjlBXGdPmTFchn0SBzy7hFcrlqKda3EyjuD0TYagQEAjxEDBc6jxuQVamvYzmuQgDGfsx5r 4NGPq1rmHaD5lQE= =tqSu -----END PGP SIGNATURE----- --------------8C14MFx8e9mKU6xhHhB07iKO--