[PATCH] ath10k: correct the array index from mcs index for HT mode for QCA6174

Kalle Valo kvalo at codeaurora.org
Sat Aug 15 03:06:28 EDT 2020

Wen Gong <wgong at codeaurora.org> wrote:

> The mcs index of HT mode is 0 to 31, please refer http://mcsindex.com/.
> Its spatial stream(Nss) number is from 1 to 4, mcs index is 0~7 for
> Nss=1, 8~15 for Nss=2, 16~23 for Nss=3 and 24~31 is for Nss=4.
> The mcs is reported from firmware in wmi_tlv_peer_stats_info of
> event WMI_TLV_PEER_STATS_INFO_EVENTID, its range is from 0~15 for
> QCA6174 SDIO and PCIe. It is for both Nss=1 and Nss=2, and it has 2
> rate table supported_ht_mcs_rate_nss1 and supported_ht_mcs_rate_nss2
> in ath10k, they are for Nss=1 and Nss=2, each table has 8 rates.
> It need to find the matched row number with the mcs index, for example,
> mcs index is 2, it is <=7, so it is Nss=1, and match row 2 in table of
> Nss=1. If mcs index is 12, it is >= 8 and <= 15, so it is Nss=2, it
> match row 4(12-8) in table of Nss=2. If mcs index is >=16, it is for
> Nss=3/4, it need to add rate table, so it is not support in current
> ath10k.
> This patch is to find the row number in rate table of Nss=1 or Nss=2
> with the mcs index reported from firmware.
> This patch only effect the chips which supports_peer_stats_info of its
> hw_params is true, it is true only for QCA6174 currently.
> Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00048
> Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00110-QCARMSWP-1
> Signed-off-by: Wen Gong <wgong at codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo at codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

db04b755edaa ath10k: correct the array index from mcs index for HT mode for QCA6174



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