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SubjectRe: [PATCH v2 2/2] dt-bindings: opp: opp-v2-kryo-cpu: enlarge opp-supported-hw maximum
On Sun, Jan 22, 2023 at 07:59:42PM +0200, Dmitry Baryshkov wrote:
> On Sun, 22 Jan 2023 at 19:46, Christian Marangi <ansuelsmth@gmail.com> wrote:
> >
> > Enlarge opp-supported-hw maximum value. In recent SoC we started
> > matching more bit and we currently match mask of 112. The old maximum of
> > 7 was good for old SoC that didn't had complex id, but now this is
> > limiting and we need to enlarge it to support more variants.
> >
> > Document all the various mask that can be used and limit them to only
> > reasonable values instead of using a generic maximum limit.
> >
> > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> > ---
> > .../bindings/opp/opp-v2-kryo-cpu.yaml | 20 +++++++++++++++++--
> > 1 file changed, 18 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml b/Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml
> > index b4947b326773..908cb0d7695a 100644
> > --- a/Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml
> > +++ b/Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml
> > @@ -50,12 +50,28 @@ patternProperties:
> > opp-supported-hw:
> > description: |
> > A single 32 bit bitmap value, representing compatible HW.
> > - Bitmap:
> > + Bitmap for MSM8996 format:
> > 0: MSM8996, speedbin 0
> > 1: MSM8996, speedbin 1
> > 2: MSM8996, speedbin 2
> > 3-31: unused
> > - maximum: 0x7
> > +
> > + Bitmap for MSM8996 later revision format:
> > + 0: MSM8996, speedbin 0
> > + 1: MSM8996, speedbin 1
> > + 2: MSM8996, speedbin 2
> > + 3: always set
>
> This is used for speedbin 3
>

Is it right that 4 bit speedbin is only introduced later? Cause looking
at the current opp-supported-hw for MSM8996SG and MSM8996 originally
(and based on what this Documentation say) there were only 3 bit and
then they started using a 4th bit. Just asking if it's ok to keep the
bitmap split or i should just merge it.

> > + 4-31: unused
> > +
> > + Bitmap for MSM8996SG format (speedbin shifted of 4 left):
> > + 0-3: unused
> > + 4: MSM8996SG, speedbin 0
> > + 5: MSM8996SG, speedbin 1
> > + 6: MSM8996SG, speedbin 2
> > + 7-31: unused
> > + enum: [0x1, 0x2, 0x3, 0x4, 0x7,
> > + 0x9, 0xd, 0xe, 0xf,
> > + 0x10, 0x20, 0x30, 0x70]
> >
> > clock-latency-ns: true
> >
> > --
> > 2.38.1
> >

--
Ansuel

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