On Fri, Nov 21, 2025 at 06:04:37PM +0530, Harikrishna Shenoy wrote:
> Remove j721e-intg register name from reg-name list for cdns,mhdp8546
> compatible. The j721e-integ registers are specific to TI SoCs, so they
> are not required for compatibles other than ti,j721e-mhdp8546.
>
> Update reg and reg-names top level constraints with lists according
> to compatibles.
>
> Move the register name constraints and reg description list to the
> appropriate compatibility sections to ensure the correct register
> names are used with each compatible value also adding the DSC register
> to make bindings align with what the hardware supports.
>
> Fixes: 7169d082e7e6 ("dt-bindings: drm/bridge: MHDP8546 bridge binding
> changes for HDCP")
> Signed-off-by: Harikrishna Shenoy <[email protected]>
> ---
>
> Links to some discussions pointing to need for a fixes patch:
> https://lore.kernel.org/all/[email protected]/
> https://lore.kernel.org/all/[email protected]/
>
> Link to v2:
> <https://lore.kernel.org/all/[email protected]/>
>
> Changelog v2 --> v3:
> -Add the reg description list and reg-name list in top level constraints
> using oneOf for either of compatible.
> Logs after testing some cases:
> https://gist.github.com/h-shenoy/a422f7278859cd95447e674963caabd9
>
> Link to v1:
> <https://lore.kernel.org/all/[email protected]/>
>
> Changelog v1 --> v2:
> -Update the reg description list for each compatible and add register space
> for dsc to make the bindings reflect what hardware supports although
> the driver doesn't support dsc yet.
>
> Note: j721e-integ are not optional registers for ti-compatible.
>
> .../display/bridge/cdns,mhdp8546.yaml | 85 ++++++++++++++-----
> 1 file changed, 66 insertions(+), 19 deletions(-)
>
> diff --git
> a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
> b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
> index c2b369456e4e2..632595ef32f63 100644
> --- a/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/cdns,mhdp8546.yaml
> @@ -17,23 +17,45 @@ properties:
> - ti,j721e-mhdp8546
>
> reg:
> - minItems: 1
> - items:
> - - description:
> - Register block of mhdptx apb registers up to PHY mapped area
> (AUX_CONFIG_P).
> - The AUX and PMA registers are not part of this range, they are
> instead
> - included in the associated PHY.
> - - description:
> - Register block for DSS_EDP0_INTG_CFG_VP registers in case of TI J7
> SoCs.
> - - description:
> - Register block of mhdptx sapb registers.
> + oneOf:
> + - minItems: 2
> + - items:
This is wrong syntax. You created here a list, so you now allow
anything with minItems 2.
> + - description:
> + Register block of mhdptx apb registers up to PHY mapped area
> (AUX_CONFIG_P).
> + The AUX and PMA registers are not part of this range, they are
> instead
> + included in the associated PHY.
> + - description:
> + Register block for DSS_EDP0_INTG_CFG_VP registers in case of
> TI J7 SoCs.
> + - description:
> + Register block of mhdptx sapb registers.
> + - description:
> + Register block for mhdptx DSC encoder registers.
> +
> + - minItems: 1
Actually anything with minItems 1... I asked for list of TWO, not FOUR,
items. Or if syntax is getting to complicated, just min and maxItems.
> + - items:
> + - description:
> + Register block of mhdptx apb registers up to PHY mapped area
> (AUX_CONFIG_P).
> + The AUX and PMA registers are not part of this range, they are
> instead
> + included in the associated PHY.
> + - description:
> + Register block of mhdptx sapb registers.
> + - description:
> + Register block for mhdptx DSC encoder registers.
>
> reg-names:
> - minItems: 1
> - items:
> - - const: mhdptx
> - - const: j721e-intg
> - - const: mhdptx-sapb
> + oneOf:
> + - minItems: 2
> + - items:
Also wrong.
> + - const: mhdptx
> + - const: j721e-intg
> + - const: mhdptx-sapb
> + - const: dsc
> +
> + - minItems: 1
> + - items:
> + - const: mhdptx
> + - const: mhdptx-sapb
> + - const: dsc
>
> clocks:
> maxItems: 1
> @@ -100,18 +122,43 @@ allOf:
> properties:
> reg:
> minItems: 2
> - maxItems: 3
Your commit msg says you "remove" but here you ADD one more item, thus
growing this 3->4.
How remove can result in 3 becoming 4?
Best regards,
Krzysztof
