Am 14.11.2017 um 23:17 schrieb Ben Greear:
On 11/13/2017 07:10 PM, Ben Greear wrote:
On 11/13/2017 06:05 PM, Sebastian Gottschall wrote:
Am 13.11.2017 um 23:50 schrieb Ben Greear:
From what I can tell, the 10.4 firmware will not even enable txbf
unless the driver
tells it too, and I don't think the driver is doing the correct
call to enable this
(it is a testing interface hack, it appears).
But, maybe I am missing something?
so the firmware does not take care about the vht flags?
There is a flag to enable implicit beamforming, but it is mis-defined
in the driver as far as I can tell:
diff --git a/drivers/net/wireless/ath/ath10k/wmi.h
b/drivers/net/wireless/ath/ath10k/wmi.h
index ff15c37..9522f22 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.h
+++ b/drivers/net/wireless/ath/ath10k/wmi.h
@@ -5195,7 +5195,8 @@ enum wmi_10_4_vdev_param {
#define WMI_VDEV_PARAM_TXBF_MU_TX_BFER BIT(3)
#define WMI_TXBF_STS_CAP_OFFSET_LSB 4
-#define WMI_TXBF_STS_CAP_OFFSET_MASK 0xf0
+#define WMI_TXBF_STS_CAP_OFFSET_MASK 0x70
+#define WMI_TXBF_CONF_IMPLICIT_BF BIT(7)
#define WMI_BF_SOUND_DIM_OFFSET_LSB 8
#define WMI_BF_SOUND_DIM_OFFSET_MASK 0xf00
Possibly that bit is somehow set anyway, dunno.
And the other explicit-beamforming appears to need a special hack to
enable
the feature in the firmware.
But, someone using my firmware gets txbf to work, so I must be
missing something.
I will dig into it more tomorrow.
At least much of my confusion is that there is a bunch of logic in the
rate-ctrl
code about txbf probing, and I was thinking that was what caused the
sounding to happen.
I now realize that is a separate feature (that cannot be enabled w/out
special
driver hacks not currently supported).
there are several unused wmi parameters which are undocumented in major
parts. but they seem to be used for mu-mimo / txbf etc.
Thanks,
Ben
--
Mit freundlichen Grüssen / Regards
Sebastian Gottschall / CTO
NewMedia-NET GmbH - DD-WRT
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