linux-kernel - Re: [PATCH] HID: intel-ish-hid: ipc: Specify no cache snooping on TGL and ADL

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Message-ID: <4d8308f4a3249b662536371e14e6cd6ef723f5a9.camel@linux.intel.com>
Date:   Fri, 17 Dec 2021 04:33:07 -0800
From:   srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Ye Xiang <xiang.ye@...el.com>, jikos@...nel.org, jic23@...nel.org
Cc:     linux-input@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: intel-ish-hid: ipc: Specify no cache snooping on
 TGL and ADL

On Fri, 2021-12-17 at 15:45 +0800, Ye Xiang wrote:
> Specify that both TGL and ADL don't support DMA cache snooping.
> 
> Signed-off-by: Ye Xiang <xiang.ye@...el.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>

> ---
>  drivers/hid/intel-ish-hid/ipc/ipc.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-
> ish-hid/ipc/ipc.c
> index 45e0c7b1c9ec..8ccb246b0114 100644
> --- a/drivers/hid/intel-ish-hid/ipc/ipc.c
> +++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
> @@ -909,7 +909,11 @@ static uint32_t ish_ipc_get_header(struct
> ishtp_device *dev, int length,
>   */
>  static bool _dma_no_cache_snooping(struct ishtp_device *dev)
>  {
> -       return dev->pdev->device == EHL_Ax_DEVICE_ID;
> +       return (dev->pdev->device == EHL_Ax_DEVICE_ID ||
> +               dev->pdev->device == TGL_LP_DEVICE_ID ||
> +               dev->pdev->device == TGL_H_DEVICE_ID ||
> +               dev->pdev->device == ADL_S_DEVICE_ID ||
> +               dev->pdev->device == ADL_P_DEVICE_ID);
>  }
>  
>  static const struct ishtp_hw_ops ish_hw_ops = {