Hi Laurent, Thanks for the feedback. On 11/14/2016 2:49 PM, Laurent Pinchart wrote: > Hi Ramiro, > > Thank you for the patch. > > On Monday 14 Nov 2016 14:20:22 Ramiro Oliveira wrote: >> Add documentation for Media and Video Device, as well as the DW MIPI CSI-2 >> Host. >> >> Signed-off-by: Ramiro Oliveira <roliveir@xxxxxxxxxxxx> >> --- >> .../devicetree/bindings/media/snps,dw-mipi-csi.txt | 27 +++++++++++++++++++ >> .../devicetree/bindings/media/snps,plat-ipk.txt | 9 ++++++++ >> .../bindings/media/snps,video-device.txt | 12 ++++++++++ >> 3 files changed, 48 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt create mode >> 100644 Documentation/devicetree/bindings/media/snps,plat-ipk.txt create >> mode 100644 Documentation/devicetree/bindings/media/snps,video-device.txt >> >> diff --git a/Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt >> b/Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file >> mode 100644 >> index 0000000..bec7441 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt >> @@ -0,0 +1,27 @@ >> +Synopsys DesignWare CSI-2 Host controller >> + >> +Description >> +----------- >> + >> +This HW block is used to receive image coming from an MIPI CSI-2 compatible >> +camera. > > And what does it do after receiving the stream ? A more detailed description > would be useful. Is there any public documentation for this IP core ? > I can add a more detailed description. Also, here is a link to the documentation, but I'm afraid you might have to register yourself to access it. CSI-2 Host https://www.synopsys.com/dw/doc.php/ds/c/dwc_csi2_controller.pdf CSI-2 Host IPK https://www.synopsys.com/dw/doc.php/ds/o/ip_prototyping_kit_mipi_csi2_host_arc.pdf >> +Required properties: >> +- compatible: shall be "snps,dw-mipi-csi" >> +- reg : physical base address and size of the device memory > mapped >> + registers; >> +- interrupts : CSI-2 Host interrupt >> +- data-lanes : Number of lanes to be used > > Is that fixed at synthesis time or configurable at runtime ? > The max number is fixed at synthesis time, but you can configure it for lower values. I added this option here because, although configurable, it's usually a fixed value. >> +- output-type : Core output to be used (IPI-> 0 or IDI->1 or BOTH->2) > > What are IPI and IDI ? > IPI is Image Pixel Interface and IDI Image Data Interface, these are the two types of data output support by our CSI-2 Host controller >> +- phys, phy-names: List of one PHY specifier and identifier string (as >> defined >> + in Documentation/devicetree/bindings/phy/phy-bindings.txt). > > A PHY for what ? > Our controller needs a PHY, in this case a MIPI DPHY, to interact with a CSI-2 receiver (usually a sensor). >> +Optional properties(if in IPI mode): >> +- ipi-mode : Mode to be used when in IPI(Camera -> 0 or Automatic -> 1) >> +- ipi-color-mode: Color depth to be used in IPI (48 bits -> 0 or 16 bits -> >> 1) >> +- ipi-auto-flush: Data auto-flush (1 -> Yes or 0 -> No) >> +- virtual-channel: Virtual channel where data is present when in IPI > > We need more details than that, this is impossible to review, sorry. > Sure, I'll add more details to the descripton >> +The per-board settings: >> + - port sub-node describing a single endpoint connected to the dw-mipi-csi >> + as described in video-interfaces.txt[1]. > > An example would be nice. > I'll add an example of how we're using it. >> diff --git a/Documentation/devicetree/bindings/media/snps,plat-ipk.txt >> b/Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file mode >> 100644 >> index 0000000..2d51541 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/media/snps,plat-ipk.txt >> @@ -0,0 +1,9 @@ >> +Synopsys DesignWare CSI-2 Host IPK Media Device >> + >> +This Media Device at the moment is not totally functional, however it is a >> base >> +for the future. > > Then let's add it later :-) We don't want to design incomplete transient DT > bindings. > I'm afraid I wasn't completely clear. This setup is fully functional. Actually this sentence made sense in the past, but no longer does now. >> +Required properties: >> + >> +- compatible: Must be "snps,plat-ipk". >> + >> diff --git a/Documentation/devicetree/bindings/media/snps,video-device.txt >> b/Documentation/devicetree/bindings/media/snps,video-device.txt new file >> mode 100644 >> index 0000000..d467092 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/media/snps,video-device.txt >> @@ -0,0 +1,12 @@ >> +Synopsys DesignWare CSI-2 Host video device >> + >> +This driver handles all the video handling part of this platform. > > This is a DT binding documentation, drivers are irrelevant. You should > describe the hardware only. > > More information is needed, based on this document I can't tell what the > "CSI-2 host video device" is. > You're right, I'll add a more detailed description. >> +Required properties: >> + >> +- compatible: Must be "snps,video-device". >> + >> +- dmas, dma-names: List of one DMA specifier and identifier string (as >> defined >> + in Documentation/devicetree/bindings/dma/dma.txt) per port. Each port >> + requires a DMA channel with the identifier string set to "port" followed >> by >> + the port index. > Thanks once again, Ramiro Oliveira -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
