Re: [PATCH V4] HID: HID-rmi - ignore to rmi_hid_read_block after system resumes.

[Hans de Goede]

Hi,

On 8/15/22 12:26, margeyang wrote:
> From: Marge Yang <marge.yang@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> 
> The interrupt GPIO will be pulled down once
> after RMI driver reads this command(Report ID:0x0A).
> It will cause "Dark resume test fail" for chromebook device.
> Hence, TP driver will ignore rmi_hid_read_block function once
> after system resumes.
> 
> Signed-off-by: Marge Yang<marge.yang@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Regards,

Hans



> ---
>  drivers/hid/hid-rmi.c | 14 +++++++++++++-
>  include/linux/rmi.h   |  2 ++
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
> index 311eee599ce9..45eacb0b8dae 100644
> --- a/drivers/hid/hid-rmi.c
> +++ b/drivers/hid/hid-rmi.c
> @@ -190,7 +190,7 @@ static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
>  {
>  	struct rmi_data *data = container_of(xport, struct rmi_data, xport);
>  	struct hid_device *hdev = data->hdev;
> -	int ret;
> +	int ret = 0;
>  	int bytes_read;
>  	int bytes_needed;
>  	int retries;
> @@ -204,6 +204,13 @@ static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
>  			goto exit;
>  	}
>  
> +	if (xport->ignoreonce == 1) {
> +		dev_err(&hdev->dev,
> +			"ignoreonce (%d)\n",
> +			xport->ignoreonce);
> +		xport->ignoreonce = 0;
> +		goto exit;
> +	}
>  	for (retries = 5; retries > 0; retries--) {
>  		data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
>  		data->writeReport[1] = 0; /* old 1 byte read count */
> @@ -469,7 +476,12 @@ static int rmi_post_resume(struct hid_device *hdev)
>  	if (ret)
>  		return ret;
>  
> +	// Avoid to read rmi_hid_read_block once after system resumes.
> +	// The interrupt will be pulled down
> +	// after RMI Read command(Report ID:0x0A).
> +	data->xport.ignoreonce = 1;
>  	ret = rmi_reset_attn_mode(hdev);
> +	data->xport.ignoreonce = 0;
>  	if (ret)
>  		goto out;
>  
> diff --git a/include/linux/rmi.h b/include/linux/rmi.h
> index ab7eea01ab42..24f63ad00970 100644
> --- a/include/linux/rmi.h
> +++ b/include/linux/rmi.h
> @@ -270,6 +270,8 @@ struct rmi_transport_dev {
>  	struct rmi_device_platform_data pdata;
>  
>  	struct input_dev *input;
> +
> +	int ignoreonce;
>  };
>  
>  /**