<yhchuang@xxxxxxxxxxx> wrote:
> From: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
>
> Originally, there are three factors of TX power:
> 1) TX base power, calibrated manually and programmed in efuse.
> 2) By-rate power, an offset to increase power depends on TX rate.
> 3) TX limit power, an offset to contraint the max power.
>
> So, driver can get the TX power index by using:
> TX_POWER_IDX = tx_base_power + min(by-rate, limit)
>
> To take SAR into consideration, we can treat it as another limit of
> the TX power. Then driver can get the TX power by using:
> TX_POWER_IDX = tx_base_power + min(by-rate, limit, sar)
>
> Note that the values stored in driver are not presented in dBm, so
> driver needs to also convert the power limit indexes of SAR with
> tx_scale_factor, then get the difference to the TX base power.
> rtw_phy_set_tx_power_sar() will convert the values of SAR power in unit of
> 0.125d Bm (sar_q3) and store them in tx_pwr_sar_{2,5}g[regd][path][rs][ch].
>
> Since certain SAR tables have single one table that isn't regulatory domain
> specific, parser can apply to all 'regd' or only one domain RTW_REGD_WW
> that SAR TX power limit can be applied no matter which regulatory domain
> is selected. Because driver get 'sar' argument by
> rtw_phy_get_tx_power_limit() with rule
> sar = is_existing(tx_pwr_sar_{2,5}g[regd]) ? tx_pwr_sar_{2,5}g[regd] :
> tx_pwr_sar_{2,5}g[RTW_REGD_WW];
>
> There are various sources of SAR table, but it is expected to adopt only
> one source. So, save current source of rtw_sar_sources to prevent more
> than one source are adopted.
>
> Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
> Signed-off-by: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx>
I'll drop these from my queue now. Please resend once there's a
concensus what interface to use.
7 patches set to Changes Requested.
11370071 [1/8] rtw88: sar: add SAR of TX power limit
11370073 [3/8] rtw88: vndcmd: sar: Apply SAR power limit via vendor command
11370075 [4/8] rtw88: sar: Load static SAR table from ACPI WRDS method
11370083 [5/8] rtw88: sar: Load dynamic SAR table from ACPI methods
11370079 [6/8] rtw88: sar: apply dynamic SAR table to tx power limit
11370081 [7/8] rtw88: sar: add sar_work to poll if dynamic SAR table is changed
11370085 [8/8] rtw88: sar: dump sar information via debugfs
--
https://patchwork.kernel.org/patch/11370071/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
