| Message ID | 20220205185429.2278860-8-paul.kocialkowski@bootlin.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | Allwinner A31/A83T MIPI CSI-2 Support and A31 ISP Support | expand |
Hi Paul, Thank you for the patch. On Sat, Feb 05, 2022 at 07:53:30PM +0100, Paul Kocialkowski wrote: > The A31 CSI controller supports two distinct input interfaces: > parallel and an external MIPI CSI-2 bridge. The parallel interface > is often connected to a set of hardware pins while the MIPI CSI-2 > bridge is an internal FIFO-ish link. As a result, these two inputs > are distinguished as two different ports. > > Note that only one of the two may be present on a controller instance. > For example, the V3s has one controller dedicated to MIPI-CSI2 and one > dedicated to parallel. Is it that only one of the two is present, or only one of the two is connected ? In the latter case I'd make both ports required, but with only one of them connected. > Update the binding with an explicit ports node that holds two distinct > port nodes: one for parallel input and one for MIPI CSI-2. > > This is backward-compatible with the single-port approach that was > previously taken for representing the parallel interface port, which > stays enumerated as fwnode port 0. > > Note that additional ports may be added in the future, especially to > support feeding the CSI controller's output to the ISP. > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > Reviewed-by: Rob Herring <robh@kernel.org> > Acked-by: Maxime Ripard <mripard@kernel.org> > --- > .../media/allwinner,sun6i-a31-csi.yaml | 60 +++++++++++++++---- > 1 file changed, 47 insertions(+), 13 deletions(-) > > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > index 8b568072a069..3cc61866ea89 100644 > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > @@ -61,6 +61,34 @@ properties: > > additionalProperties: false > > + ports: > + $ref: /schemas/graph.yaml#/properties/ports > + > + properties: > + port@0: > + $ref: "#/properties/port" > + unevaluatedProperties: false > + > + port@1: > + $ref: /schemas/graph.yaml#/$defs/port-base > + description: MIPI CSI-2 bridge input port > + > + properties: > + reg: > + const: 1 > + > + endpoint: > + $ref: video-interfaces.yaml# > + unevaluatedProperties: false > + > + additionalProperties: false > + > + anyOf: > + - required: > + - port@0 > + - required: > + - port@1 > + > required: > - compatible > - reg Shouldn't you specify that either port or ports is required, but not both ? I'd also add a comment in the port node to tell it's deprecated, and that ports should be used instead. > @@ -89,19 +117,25 @@ examples: > "ram"; > resets = <&ccu RST_BUS_CSI>; > > - port { > - /* Parallel bus endpoint */ > - csi1_ep: endpoint { > - remote-endpoint = <&adv7611_ep>; > - bus-width = <16>; > - > - /* > - * If hsync-active/vsync-active are missing, > - * embedded BT.656 sync is used. > - */ > - hsync-active = <0>; /* Active low */ > - vsync-active = <0>; /* Active low */ > - pclk-sample = <1>; /* Rising */ > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + > + port@0 { > + reg = <0>; > + /* Parallel bus endpoint */ > + csi1_ep: endpoint { > + remote-endpoint = <&adv7611_ep>; > + bus-width = <16>; > + > + /* > + * If hsync-active/vsync-active are missing, > + * embedded BT.656 sync is used. > + */ > + hsync-active = <0>; /* Active low */ > + vsync-active = <0>; /* Active low */ > + pclk-sample = <1>; /* Rising */ Wrong indentation. > + }; > }; > }; > };
Hi Laurent, Thanks for the review! On Mon 07 Feb 22, 18:03, Laurent Pinchart wrote: > Hi Paul, > > Thank you for the patch. > > On Sat, Feb 05, 2022 at 07:53:30PM +0100, Paul Kocialkowski wrote: > > The A31 CSI controller supports two distinct input interfaces: > > parallel and an external MIPI CSI-2 bridge. The parallel interface > > is often connected to a set of hardware pins while the MIPI CSI-2 > > bridge is an internal FIFO-ish link. As a result, these two inputs > > are distinguished as two different ports. > > > > Note that only one of the two may be present on a controller instance. > > For example, the V3s has one controller dedicated to MIPI-CSI2 and one > > dedicated to parallel. > > Is it that only one of the two is present, or only one of the two is > connected ? In the latter case I'd make both ports required, but with > only one of them connected. There are situations where the actual pins for parallel (port@0) are missing and the controller is dedicated to its mipi csi-2 bridge (port@1), cases where the two are present and cases where the mipi csi-2 bridge doesn't exist. So all in all it's really legit that only one port may be defined. > > Update the binding with an explicit ports node that holds two distinct > > port nodes: one for parallel input and one for MIPI CSI-2. > > > > This is backward-compatible with the single-port approach that was > > previously taken for representing the parallel interface port, which > > stays enumerated as fwnode port 0. > > > > Note that additional ports may be added in the future, especially to > > support feeding the CSI controller's output to the ISP. > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > > Reviewed-by: Rob Herring <robh@kernel.org> > > Acked-by: Maxime Ripard <mripard@kernel.org> > > --- > > .../media/allwinner,sun6i-a31-csi.yaml | 60 +++++++++++++++---- > > 1 file changed, 47 insertions(+), 13 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > index 8b568072a069..3cc61866ea89 100644 > > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > @@ -61,6 +61,34 @@ properties: > > > > additionalProperties: false > > > > + ports: > > + $ref: /schemas/graph.yaml#/properties/ports > > + > > + properties: > > + port@0: > > + $ref: "#/properties/port" > > + unevaluatedProperties: false > > + > > + port@1: > > + $ref: /schemas/graph.yaml#/$defs/port-base > > + description: MIPI CSI-2 bridge input port > > + > > + properties: > > + reg: > > + const: 1 > > + > > + endpoint: > > + $ref: video-interfaces.yaml# > > + unevaluatedProperties: false > > + > > + additionalProperties: false > > + > > + anyOf: > > + - required: > > + - port@0 > > + - required: > > + - port@1 > > + > > required: > > - compatible > > - reg > > Shouldn't you specify that either port or ports is required, but not > both ? I'd also add a comment in the port node to tell it's deprecated, > and that ports should be used instead. Yes I agree on both points. I guess that should be a: oneOf: - required: - ports - required: - port (but feel free to correct me). > > @@ -89,19 +117,25 @@ examples: > > "ram"; > > resets = <&ccu RST_BUS_CSI>; > > > > - port { > > - /* Parallel bus endpoint */ > > - csi1_ep: endpoint { > > - remote-endpoint = <&adv7611_ep>; > > - bus-width = <16>; > > - > > - /* > > - * If hsync-active/vsync-active are missing, > > - * embedded BT.656 sync is used. > > - */ > > - hsync-active = <0>; /* Active low */ > > - vsync-active = <0>; /* Active low */ > > - pclk-sample = <1>; /* Rising */ > > + ports { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + port@0 { > > + reg = <0>; > > + /* Parallel bus endpoint */ > > + csi1_ep: endpoint { > > + remote-endpoint = <&adv7611_ep>; > > + bus-width = <16>; > > + > > + /* > > + * If hsync-active/vsync-active are missing, > > + * embedded BT.656 sync is used. > > + */ > > + hsync-active = <0>; /* Active low */ > > + vsync-active = <0>; /* Active low */ > > + pclk-sample = <1>; /* Rising */ > > Wrong indentation. The double-space before /* Rising */ or something with the heading indent? Thanks, Paul > > + }; > > }; > > }; > > }; > > -- > Regards, > > Laurent Pinchart
On Fri, Feb 11, 2022 at 05:10:06PM +0100, Paul Kocialkowski wrote: > Hi Laurent, > > Thanks for the review! > > On Mon 07 Feb 22, 18:03, Laurent Pinchart wrote: > > Hi Paul, > > > > Thank you for the patch. > > > > On Sat, Feb 05, 2022 at 07:53:30PM +0100, Paul Kocialkowski wrote: > > > The A31 CSI controller supports two distinct input interfaces: > > > parallel and an external MIPI CSI-2 bridge. The parallel interface > > > is often connected to a set of hardware pins while the MIPI CSI-2 > > > bridge is an internal FIFO-ish link. As a result, these two inputs > > > are distinguished as two different ports. > > > > > > Note that only one of the two may be present on a controller instance. > > > For example, the V3s has one controller dedicated to MIPI-CSI2 and one > > > dedicated to parallel. > > > > Is it that only one of the two is present, or only one of the two is > > connected ? In the latter case I'd make both ports required, but with > > only one of them connected. > > There are situations where the actual pins for parallel (port@0) are missing > and the controller is dedicated to its mipi csi-2 bridge (port@1), cases where > the two are present and cases where the mipi csi-2 bridge doesn't exist. > So all in all it's really legit that only one port may be defined. The port could still exist internally in the IP core though. Of course that's hard to tell. > > > Update the binding with an explicit ports node that holds two distinct > > > port nodes: one for parallel input and one for MIPI CSI-2. > > > > > > This is backward-compatible with the single-port approach that was > > > previously taken for representing the parallel interface port, which > > > stays enumerated as fwnode port 0. > > > > > > Note that additional ports may be added in the future, especially to > > > support feeding the CSI controller's output to the ISP. > > > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > > > Reviewed-by: Rob Herring <robh@kernel.org> > > > Acked-by: Maxime Ripard <mripard@kernel.org> > > > --- > > > .../media/allwinner,sun6i-a31-csi.yaml | 60 +++++++++++++++---- > > > 1 file changed, 47 insertions(+), 13 deletions(-) > > > > > > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > index 8b568072a069..3cc61866ea89 100644 > > > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > @@ -61,6 +61,34 @@ properties: > > > > > > additionalProperties: false > > > > > > + ports: > > > + $ref: /schemas/graph.yaml#/properties/ports > > > + > > > + properties: > > > + port@0: > > > + $ref: "#/properties/port" > > > + unevaluatedProperties: false > > > + > > > + port@1: > > > + $ref: /schemas/graph.yaml#/$defs/port-base > > > + description: MIPI CSI-2 bridge input port > > > + > > > + properties: > > > + reg: > > > + const: 1 > > > + > > > + endpoint: > > > + $ref: video-interfaces.yaml# > > > + unevaluatedProperties: false > > > + > > > + additionalProperties: false > > > + > > > + anyOf: > > > + - required: > > > + - port@0 > > > + - required: > > > + - port@1 > > > + > > > required: > > > - compatible > > > - reg > > > > Shouldn't you specify that either port or ports is required, but not > > both ? I'd also add a comment in the port node to tell it's deprecated, > > and that ports should be used instead. > > Yes I agree on both points. I guess that should be a: > > oneOf: > - required: > - ports > - required: > - port > > (but feel free to correct me). > > > > @@ -89,19 +117,25 @@ examples: > > > "ram"; > > > resets = <&ccu RST_BUS_CSI>; > > > > > > - port { > > > - /* Parallel bus endpoint */ > > > - csi1_ep: endpoint { > > > - remote-endpoint = <&adv7611_ep>; > > > - bus-width = <16>; > > > - > > > - /* > > > - * If hsync-active/vsync-active are missing, > > > - * embedded BT.656 sync is used. > > > - */ > > > - hsync-active = <0>; /* Active low */ > > > - vsync-active = <0>; /* Active low */ > > > - pclk-sample = <1>; /* Rising */ > > > + ports { > > > + #address-cells = <1>; > > > + #size-cells = <0>; > > > + > > > + port@0 { > > > + reg = <0>; > > > + /* Parallel bus endpoint */ > > > + csi1_ep: endpoint { > > > + remote-endpoint = <&adv7611_ep>; > > > + bus-width = <16>; > > > + > > > + /* > > > + * If hsync-active/vsync-active are missing, > > > + * embedded BT.656 sync is used. > > > + */ > > > + hsync-active = <0>; /* Active low */ > > > + vsync-active = <0>; /* Active low */ > > > + pclk-sample = <1>; /* Rising */ > > > > Wrong indentation. > > The double-space before /* Rising */ or something with the heading indent? The heading has one extra space for all three lines, they should be aligned to the / of /*, not to the *. > > > + }; > > > }; > > > }; > > > };
Hi, On Fri 11 Feb 22, 22:56, Laurent Pinchart wrote: > On Fri, Feb 11, 2022 at 05:10:06PM +0100, Paul Kocialkowski wrote: > > Hi Laurent, > > > > Thanks for the review! > > > > On Mon 07 Feb 22, 18:03, Laurent Pinchart wrote: > > > Hi Paul, > > > > > > Thank you for the patch. > > > > > > On Sat, Feb 05, 2022 at 07:53:30PM +0100, Paul Kocialkowski wrote: > > > > The A31 CSI controller supports two distinct input interfaces: > > > > parallel and an external MIPI CSI-2 bridge. The parallel interface > > > > is often connected to a set of hardware pins while the MIPI CSI-2 > > > > bridge is an internal FIFO-ish link. As a result, these two inputs > > > > are distinguished as two different ports. > > > > > > > > Note that only one of the two may be present on a controller instance. > > > > For example, the V3s has one controller dedicated to MIPI-CSI2 and one > > > > dedicated to parallel. > > > > > > Is it that only one of the two is present, or only one of the two is > > > connected ? In the latter case I'd make both ports required, but with > > > only one of them connected. > > > > There are situations where the actual pins for parallel (port@0) are missing > > and the controller is dedicated to its mipi csi-2 bridge (port@1), cases where > > the two are present and cases where the mipi csi-2 bridge doesn't exist. > > So all in all it's really legit that only one port may be defined. > > The port could still exist internally in the IP core though. Of course > that's hard to tell. Yes that's true, the bit to switch input to mipi csi-2 is there in all cases but I don't think it makes sense to expose the port in situations where no controller is attached. > > > > Update the binding with an explicit ports node that holds two distinct > > > > port nodes: one for parallel input and one for MIPI CSI-2. > > > > > > > > This is backward-compatible with the single-port approach that was > > > > previously taken for representing the parallel interface port, which > > > > stays enumerated as fwnode port 0. > > > > > > > > Note that additional ports may be added in the future, especially to > > > > support feeding the CSI controller's output to the ISP. > > > > > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> > > > > Reviewed-by: Rob Herring <robh@kernel.org> > > > > Acked-by: Maxime Ripard <mripard@kernel.org> > > > > --- > > > > .../media/allwinner,sun6i-a31-csi.yaml | 60 +++++++++++++++---- > > > > 1 file changed, 47 insertions(+), 13 deletions(-) > > > > > > > > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > > index 8b568072a069..3cc61866ea89 100644 > > > > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > > > @@ -61,6 +61,34 @@ properties: > > > > > > > > additionalProperties: false > > > > > > > > + ports: > > > > + $ref: /schemas/graph.yaml#/properties/ports > > > > + > > > > + properties: > > > > + port@0: > > > > + $ref: "#/properties/port" > > > > + unevaluatedProperties: false > > > > + > > > > + port@1: > > > > + $ref: /schemas/graph.yaml#/$defs/port-base > > > > + description: MIPI CSI-2 bridge input port > > > > + > > > > + properties: > > > > + reg: > > > > + const: 1 > > > > + > > > > + endpoint: > > > > + $ref: video-interfaces.yaml# > > > > + unevaluatedProperties: false > > > > + > > > > + additionalProperties: false > > > > + > > > > + anyOf: > > > > + - required: > > > > + - port@0 > > > > + - required: > > > > + - port@1 > > > > + > > > > required: > > > > - compatible > > > > - reg > > > > > > Shouldn't you specify that either port or ports is required, but not > > > both ? I'd also add a comment in the port node to tell it's deprecated, > > > and that ports should be used instead. > > > > Yes I agree on both points. I guess that should be a: > > > > oneOf: > > - required: > > - ports > > - required: > > - port > > > > (but feel free to correct me). > > > > > > @@ -89,19 +117,25 @@ examples: > > > > "ram"; > > > > resets = <&ccu RST_BUS_CSI>; > > > > > > > > - port { > > > > - /* Parallel bus endpoint */ > > > > - csi1_ep: endpoint { > > > > - remote-endpoint = <&adv7611_ep>; > > > > - bus-width = <16>; > > > > - > > > > - /* > > > > - * If hsync-active/vsync-active are missing, > > > > - * embedded BT.656 sync is used. > > > > - */ > > > > - hsync-active = <0>; /* Active low */ > > > > - vsync-active = <0>; /* Active low */ > > > > - pclk-sample = <1>; /* Rising */ > > > > + ports { > > > > + #address-cells = <1>; > > > > + #size-cells = <0>; > > > > + > > > > + port@0 { > > > > + reg = <0>; > > > > + /* Parallel bus endpoint */ > > > > + csi1_ep: endpoint { > > > > + remote-endpoint = <&adv7611_ep>; > > > > + bus-width = <16>; > > > > + > > > > + /* > > > > + * If hsync-active/vsync-active are missing, > > > > + * embedded BT.656 sync is used. > > > > + */ > > > > + hsync-active = <0>; /* Active low */ > > > > + vsync-active = <0>; /* Active low */ > > > > + pclk-sample = <1>; /* Rising */ > > > > > > Wrong indentation. > > > > The double-space before /* Rising */ or something with the heading indent? > > The heading has one extra space for all three lines, they should be > aligned to the / of /*, not to the *. Oh that's true, good catch thanks! Paul > > > > + }; > > > > }; > > > > }; > > > > }; > > -- > Regards, > > Laurent Pinchart
diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml index 8b568072a069..3cc61866ea89 100644 --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml @@ -61,6 +61,34 @@ properties: additionalProperties: false + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: "#/properties/port" + unevaluatedProperties: false + + port@1: + $ref: /schemas/graph.yaml#/$defs/port-base + description: MIPI CSI-2 bridge input port + + properties: + reg: + const: 1 + + endpoint: + $ref: video-interfaces.yaml# + unevaluatedProperties: false + + additionalProperties: false + + anyOf: + - required: + - port@0 + - required: + - port@1 + required: - compatible - reg @@ -89,19 +117,25 @@ examples: "ram"; resets = <&ccu RST_BUS_CSI>; - port { - /* Parallel bus endpoint */ - csi1_ep: endpoint { - remote-endpoint = <&adv7611_ep>; - bus-width = <16>; - - /* - * If hsync-active/vsync-active are missing, - * embedded BT.656 sync is used. - */ - hsync-active = <0>; /* Active low */ - vsync-active = <0>; /* Active low */ - pclk-sample = <1>; /* Rising */ + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + /* Parallel bus endpoint */ + csi1_ep: endpoint { + remote-endpoint = <&adv7611_ep>; + bus-width = <16>; + + /* + * If hsync-active/vsync-active are missing, + * embedded BT.656 sync is used. + */ + hsync-active = <0>; /* Active low */ + vsync-active = <0>; /* Active low */ + pclk-sample = <1>; /* Rising */ + }; }; }; };