RE: [PATCH v2 04/11] wifi: rtw88: fw: fix the reserved page upload on RTL8723BS

[Ping-Ke Shih <pkshih@realtek.com>]

luka.gejak@linux.dev <luka.gejak@linux.dev> wrote:

[...]

> diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
> index dd6595b8175e..7c17086cac32 100644
> --- a/drivers/net/wireless/realtek/rtw88/fw.c
> +++ b/drivers/net/wireless/realtek/rtw88/fw.c
> @@ -1477,10 +1477,14 @@ void rtw_add_rsvd_page_sta(struct rtw_dev *rtwdev,
>         rtw_add_rsvd_page(rtwdev, rtwvif, RSVD_LPS_PG_INFO, true);
>  }
> 
> +/* REG_DWBCN1_CTRL bit 20 (SW_BCN_SEL for port 0), relative to byte +2 */
> +#define BIT_OFFSET_DWBCN1_SW_BCN_SEL_PORT0     (20 - 16)

define along its register REG_DWBCN1_CTRL

> +
>  int rtw_fw_write_data_rsvd_page(struct rtw_dev *rtwdev, u16 pg_addr,
>                                 u8 *buf, u32 size)
>  {
> -       u8 bckp[3];
> +       const bool is_8723bs_sdio = rtw_is_8723bs(rtwdev);
> +       u8 bckp[4];
>         u8 val;
>         u16 rsvd_pg_head;
>         u32 bcn_valid_addr;
> @@ -1510,13 +1514,28 @@ int rtw_fw_write_data_rsvd_page(struct rtw_dev *rtwdev, u16 pg_addr,
>         rtw_write8(rtwdev, REG_BCN_CTRL,
>                    (bckp[2] & ~BIT_EN_BCN_FUNCTION) | BIT_DIS_TSF_UDT);
> 
> -       if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_PCIE) {
> +       /* Clear BIT_EN_BCNQ_DL so the chip does not treat the reserved-page
> +        * upload as a real beacon; otherwise BIT_BCN_VALID never asserts. The
> +        * vendor rtl8723bs driver does this unconditionally; rtw88 only did it
> +        * for PCIe, which left 8723BS SDIO's BCN_VALID handshake failing.
> +        */
> +       if (rtw_hci_type(rtwdev) == RTW_HCI_TYPE_PCIE || is_8723bs_sdio) {
>                 val = rtw_read8(rtwdev, REG_FWHW_TXQ_CTRL + 2);
>                 bckp[1] = val;
>                 val &= ~(BIT_EN_BCNQ_DL >> 16);
>                 rtw_write8(rtwdev, REG_FWHW_TXQ_CTRL + 2, val);
>         }
> 
> +       /* 8723BS SDIO: point the SW beacon download path at port 0, else
> +        * BIT_BCN_VALID is never asserted after the SDIO upload completes.
> +        */

Currently, not use networking specific comment style anymore

   /*
    * first line
    * second
    */

> +       if (is_8723bs_sdio) {
> +               val = rtw_read8(rtwdev, REG_DWBCN1_CTRL + 2);
> +               bckp[3] = val;
> +               val &= ~BIT(BIT_OFFSET_DWBCN1_SW_BCN_SEL_PORT0);

define along its register REG_DWBCN1_CTRL. Then, here

 val &= ~(BIT_DWBCN1_SW_BCN_SEL_PORT0 >> 16);


> +               rtw_write8(rtwdev, REG_DWBCN1_CTRL + 2, val);
> +       }
> +
>         ret = rtw_hci_write_data_rsvd_page(rtwdev, buf, size);
>         if (ret) {
>                 rtw_err(rtwdev, "failed to write data to rsvd page\n");