Messages in this thread | | | Date | Fri, 25 Jul 2014 11:47:05 +0200 | From | Andreas Färber <> | Subject | Re: [PATCH v2 08/11] ARM: dts: zynq: Add VDMA to Parallella |
| |
Hi Sören,
Am 25.07.2014 01:22, schrieb Sören Brinkmann: > On Fri, 2014-07-25 at 01:00AM +0200, Andreas Färber wrote: >> Signed-off-by: Andreas Färber <afaerber@suse.de> >> --- >> v2: New >> >> arch/arm/boot/dts/zynq-parallella.dts | 25 +++++++++++++++++++++++++ >> 1 file changed, 25 insertions(+) >> >> diff --git a/arch/arm/boot/dts/zynq-parallella.dts b/arch/arm/boot/dts/zynq-parallella.dts >> index e60a0a9..8beaacc 100644 >> --- a/arch/arm/boot/dts/zynq-parallella.dts >> +++ b/arch/arm/boot/dts/zynq-parallella.dts >> @@ -32,6 +32,31 @@ >> bootargs = "console=ttyPS0,115200 earlyprintk root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait"; >> linux,stdout-path = "/amba/serial@e0001000"; >> }; >> + >> + fpga { > Do you really want FPGA components in this DT? > If somebody tries booting with this DT without programming with a > corresponding bitstream, the whole system might hang. > Just something to consider.
Well, that's related to a question that remained unanswered on v1: whether we may need to turn this into a .dtsi to cope with variations.
The Parallella has an on-board µHDMI connector, and two bitstreams are delivered - one for HDMI and one for headless usage. In my testing I am using the original HDMI bitstream but serial console for lack of upstream HDMI drivers. Do you think we need to provide zynq-parallella-hdmi.dts and zynq-parallella-headless.dts? (It gets worse if at some point we need to handle variations of the on-board Epiphany chip plus the bitstreams - at least the Z7010 vs. Z7020 doesn't affect DT AFAICT.)
Since, as noted in the cover letter, these FPGA patches are not yet fully testable, I wouldn't mind deferring them, but wanted to get them out for review early.
http://www.parallella.org/2014/07/14/new-parallella-product-offerings/ indicates there will be a new variation in gen2 without USB/HDMI. Would it be valid to #include a .dts (rather than .dtsi) to override status and keep number of Parallella files low?
Regards, Andreas
-- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |