| Message ID | 1457710959-9562-3-git-send-email-abrodkin@synopsys.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Mar 11, 2016 at 06:42:37PM +0300, Alexey Brodkin wrote: > This add DT bindings documentation for ARC PGU display controller. > > Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Pawel Moll <pawel.moll@arm.com> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> > Cc: Kumar Gala <galak@codeaurora.org> > Cc: David Airlie <airlied@linux.ie> > Cc: dri-devel@lists.freedesktop.org > Cc: devicetree@vger.kernel.org > Cc: linux-snps-arc@lists.infradead.org > --- > > Changes v2 -> v3: > * Reverted back to initial larger version of example > with minor fixes (thanks Rob for spotting those). > > Changes v1 -> v2: > * Removed everything except PGU node itself. > > .../devicetree/bindings/display/snps,arcpgu.txt | 72 ++++++++++++++++++++++ > 1 file changed, 72 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt > > diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt b/Documentation/devicetree/bindings/display/snps,arcpgu.txt > new file mode 100644 > index 0000000..b130924 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt > @@ -0,0 +1,72 @@ > +ARC PGU > + > +This is a display controller found on several development boards produced > +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a > +framebuffer and sends it to a single digital encoder (usually HDMI). > + > +Required properties: > + - compatible: "snps,arcpgu" > + - reg: Physical base address and length of the controller's registers. > + - clocks: A list of phandle + clock-specifier pairs, one for each > + entry in 'clock-names'. > + - clock-names: A list of clock names. For ARC PGU it should contain: > + - "pxlclk" for the clock feeding the output PLL of the controller. > + - encoder-slave: Phandle of encoder chip. Drop this as discussed. > + > +Required sub-nodes: > + - port: The PGU connection to an encoder chip. > + > +Example: > + > +/ { > + ... > + > + pgu@XXXXXXXX { > + compatible = "snps,arcpgu"; > + reg = <0xXXXXXXXX 0x400>; > + clocks = <&clock_node>; > + clock-names = "pxlclk"; > + encoder-slave = <&encoder_node>; > + > + port { > + pgu_output: endpoint { > + remote-endpoint = <&hdmi_enc_input>; > + }; > + }; > + }; > + > + /* HDMI encoder on I2C bus */ > + i2c@XXXXXXXX { > + compatible = "..."; > + > + encoder_node:encoder_node@0xXX{ Don't use underscores in node names. Just "hdmi@xx" > + compatible="..."; > + > + ports { > + port@0 { > + reg = <0>; > + hdmi_enc_input:endpoint { > + remote-endpoint = <&pgu_output>; > + }; > + }; > + > + port@1 { > + reg = <1>; > + hdmi_enc_output:endpoint { > + remote-endpoint = <&hdmi_connector_in>; > + }; > + }; > + }; > + }; > + } > + > + hdmi0: connector { > + compatible = "hdmi-connector"; > + > + port { > + hdmi_connector_in: endpoint { > + remote-endpoint = <&hdmi_enc_output>; > + }; > + }; > + }; > +}; > -- > 2.5.0 >
Hi Rob, On Mon, 2016-03-21 at 08:04 -0500, Rob Herring wrote: > On Fri, Mar 11, 2016 at 06:42:37PM +0300, Alexey Brodkin wrote: > > > > This add DT bindings documentation for ARC PGU display controller. > > > > Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> > > Cc: Rob Herring <robh+dt@kernel.org> > > Cc: Pawel Moll <pawel.moll@arm.com> > > Cc: Mark Rutland <mark.rutland@arm.com> > > Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> > > Cc: Kumar Gala <galak@codeaurora.org> > > Cc: David Airlie <airlied@linux.ie> > > Cc: dri-devel@lists.freedesktop.org > > Cc: devicetree@vger.kernel.org > > Cc: linux-snps-arc@lists.infradead.org > > --- > > > > Changes v2 -> v3: > > * Reverted back to initial larger version of example > > with minor fixes (thanks Rob for spotting those). > > > > Changes v1 -> v2: > > * Removed everything except PGU node itself. > > > > .../devicetree/bindings/display/snps,arcpgu.txt | 72 ++++++++++++++++++++++ > > 1 file changed, 72 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt > > > > diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt > > b/Documentation/devicetree/bindings/display/snps,arcpgu.txt > > new file mode 100644 > > index 0000000..b130924 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt > > @@ -0,0 +1,72 @@ > > +ARC PGU > > + > > +This is a display controller found on several development boards produced > > +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a > > +framebuffer and sends it to a single digital encoder (usually HDMI). > > + > > +Required properties: > > + - compatible: "snps,arcpgu" > > + - reg: Physical base address and length of the controller's registers. > > + - clocks: A list of phandle + clock-specifier pairs, one for each > > + entry in 'clock-names'. > > + - clock-names: A list of clock names. For ARC PGU it should contain: > > + - "pxlclk" for the clock feeding the output PLL of the controller. > > + - encoder-slave: Phandle of encoder chip. > Drop this as discussed. Ok I'll do that. But what about my example below? Do I need to remove encoder node from it as well? > > > > + > > +Required sub-nodes: > > + - port: The PGU connection to an encoder chip. > > + > > +Example: > > + > > +/ { > > + ... > > + > > + pgu@XXXXXXXX { > > + compatible = "snps,arcpgu"; > > + reg = <0xXXXXXXXX 0x400>; > > + clocks = <&clock_node>; > > + clock-names = "pxlclk"; > > + encoder-slave = <&encoder_node>; > > + > > + port { > > + pgu_output: endpoint { > > + remote-endpoint = <&hdmi_enc_input>; > > + }; > > + }; > > + }; > > + > > + /* HDMI encoder on I2C bus */ > > + i2c@XXXXXXXX { > > + compatible = "..."; > > + > > + encoder_node:encoder_node@0xXX{ > Don't use underscores in node names. Just "hdmi@xx" Ok still I may keep label "encoder_node" here, right? -Alexey
diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt b/Documentation/devicetree/bindings/display/snps,arcpgu.txt new file mode 100644 index 0000000..b130924 --- /dev/null +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt @@ -0,0 +1,72 @@ +ARC PGU + +This is a display controller found on several development boards produced +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a +framebuffer and sends it to a single digital encoder (usually HDMI). + +Required properties: + - compatible: "snps,arcpgu" + - reg: Physical base address and length of the controller's registers. + - clocks: A list of phandle + clock-specifier pairs, one for each + entry in 'clock-names'. + - clock-names: A list of clock names. For ARC PGU it should contain: + - "pxlclk" for the clock feeding the output PLL of the controller. + - encoder-slave: Phandle of encoder chip. + +Required sub-nodes: + - port: The PGU connection to an encoder chip. + +Example: + +/ { + ... + + pgu@XXXXXXXX { + compatible = "snps,arcpgu"; + reg = <0xXXXXXXXX 0x400>; + clocks = <&clock_node>; + clock-names = "pxlclk"; + encoder-slave = <&encoder_node>; + + port { + pgu_output: endpoint { + remote-endpoint = <&hdmi_enc_input>; + }; + }; + }; + + /* HDMI encoder on I2C bus */ + i2c@XXXXXXXX { + compatible = "..."; + + encoder_node:encoder_node@0xXX{ + compatible="..."; + + ports { + port@0 { + reg = <0>; + hdmi_enc_input:endpoint { + remote-endpoint = <&pgu_output>; + }; + }; + + port@1 { + reg = <1>; + hdmi_enc_output:endpoint { + remote-endpoint = <&hdmi_connector_in>; + }; + }; + }; + }; + } + + hdmi0: connector { + compatible = "hdmi-connector"; + + port { + hdmi_connector_in: endpoint { + remote-endpoint = <&hdmi_enc_output>; + }; + }; + }; +};
This add DT bindings documentation for ARC PGU display controller. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: David Airlie <airlied@linux.ie> Cc: dri-devel@lists.freedesktop.org Cc: devicetree@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org --- Changes v2 -> v3: * Reverted back to initial larger version of example with minor fixes (thanks Rob for spotting those). Changes v1 -> v2: * Removed everything except PGU node itself. .../devicetree/bindings/display/snps,arcpgu.txt | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt