On Fri, Apr 05, 2024 at 11:25:50AM +0100, Dave Stevenson wrote: > Hi Conor > > On Wed, 3 Apr 2024 at 17:14, Conor Dooley <conor@xxxxxxxxxx> wrote: > > > > On Wed, Apr 03, 2024 at 09:03:47AM -0600, git@xxxxxxxxxxxx wrote: > > > From: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> > > > > > > There are a number of variants of the imx258 modules that can not > > > be differentiated at runtime, so add compatible strings for the > > > PDAF variant. > > > > > > Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> > > > Signed-off-by: Luis Garcia <git@xxxxxxxxxxxx> > > > --- > > > .../devicetree/bindings/media/i2c/sony,imx258.yaml | 9 +++++++-- > > > 1 file changed, 7 insertions(+), 2 deletions(-) > > > > > > diff --git a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml > > > index bee61a443b23..c978abc0cdb3 100644 > > > --- a/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml > > > +++ b/Documentation/devicetree/bindings/media/i2c/sony,imx258.yaml > > > @@ -13,11 +13,16 @@ description: |- > > > IMX258 is a diagonal 5.867mm (Type 1/3.06) 13 Mega-pixel CMOS active pixel > > > type stacked image sensor with a square pixel array of size 4208 x 3120. It > > > is programmable through I2C interface. Image data is sent through MIPI > > > - CSI-2. > > > + CSI-2. The sensor exists in two different models, a standard variant > > > + (IMX258) and a variant with phase detection autofocus (IMX258-PDAF). > > > + The camera module does not expose the model through registers, so the > > > + exact model needs to be specified. > > > > > > properties: > > > compatible: > > > - const: sony,imx258 > > > + enum: > > > + - sony,imx258 > > > + - sony,imx258-pdaf > > > > Does the pdaf variant support all of the features/is it register > > compatible with the regular variant? If it is, the regular variant > > should be a fallback compatible. > > It has the same register set, but certain registers have to be > programmed differently so that the image is corrected for the > partially shielded pixels used for phase detect auto focus (PDAF). > Either compatible will "work" on either variant of the module, but > you'll get weird image artifacts when using the wrong one. To paraphase, a fallback compatible is not suitable. Thanks Dave, Conor.
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