On 07/19/2018 08:25 PM, Magnus Damm wrote: >>> From: Magnus Damm <damm+rene...@opensource.se> >>> >>> According to the data sheet the Ethernet-AVB hardware in R-Car Gen3 >>> and R-Car Gen2 SoCs do not support half duplex operation. So update >>> the driver to mark 100Mbit HDX as unsupported. >> >> What about 1000Mbit HDX? > > For Twister Pair I believe 10 and 100 Mbps come in HDX and FDX flavors > while 1 Gbps is HDX-only.
Are we limited to TP? > https://en.wikipedia.org/wiki/Ethernet_over_twisted_pair > >>> Not-Yet-Signed-off-by: Magnus Damm <damm+rene...@opensource.se> >>> --- >>> >>> Written on top of renesas-drivers-2018-07-17-v4.18-rc5 >>> >>> drivers/net/ethernet/renesas/ravb_main.c | 4 ++-- >>> 1 file changed, 2 insertions(+), 2 deletions(-) >>> >>> --- 0001/drivers/net/ethernet/renesas/ravb_main.c >>> +++ work/drivers/net/ethernet/renesas/ravb_main.c 2018-07-19 >>> 19:18:38.210607110 +0900 >>> @@ -1066,8 +1066,8 @@ static int ravb_phy_init(struct net_devi >>> netdev_info(ndev, "limited PHY to 100Mbit/s\n"); >>> } >>> >>> - /* 10BASE is not supported */ >>> - phydev->supported &= ~PHY_10BT_FEATURES; >>> + /* Nether 10BASE nor half duplex is supported */ >> >> Neither. s/is/are/? >> >>> + phydev->supported &= ~(PHY_10BT_FEATURES | SUPPORTED_100baseT_Half); >> >> I think you missed SUPPORTED_1000baseT_Half. > > Perhaps so, but in reality all our boards use a PHY with Twisted Pair I don't think we should limit ourselves to the development boards... > cables so SUPPORTED_1000baseT_Half doesn't exist in reality. That > aside, I suspect the PHY layer is designed to support more than just > Ethernet-over-TP so that's the reason for that particular constant and > all the other stuff in phy.h. Yes, probably. I'd like the code to be formally correct, so you need also to mask off 1000Gbit HDX. >> [garbage skipped] > > You mean the rest of the driver? =) Naw. Some other mail got attached at the end of this patch -- probably, it's just me... :-) > Cheers, > > / magnus MBR, Sergei
