linux-kernel - Re: [PATCH 1/6] thinkpad_acpi: Remember adaptive kbd presence

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Date:	Thu, 19 Feb 2015 21:08:43 -0800
From:	Darren Hart <dvhart@...radead.org>
To:	Bastien Nocera <hadess@...ess.net>
Cc:	Henrique de Moraes Holschuh <ibm-acpi@....eng.br>,
	ibm-acpi-devel@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org
Subject: Re: [PATCH 1/6] thinkpad_acpi: Remember adaptive kbd presence

On Wed, Feb 18, 2015 at 09:53:28PM +0100, Bastien Nocera wrote:
> Rather than checking on each suspend and resume whether the laptop
> has an adaptive keyboard, check when the driver is initialised.

Reasonable.

> 
> Signed-off-by: Bastien Nocera <hadess@...ess.net>
> ---
>  drivers/platform/x86/thinkpad_acpi.c | 38 ++++++++++++++++++------------------
>  1 file changed, 19 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index c3d11fa..80db3ce 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
...
> @@ -3226,6 +3227,13 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
>  	if (!tp_features.hotkey)
>  		return 1;
>  
> +	/* does it have an adaptive keyboard, like
> +	 * the Lenovo Carbon X1 2014 (2nd gen) */

Please follow CodingStyle here:

/*
 * Sentence formatting.
 * Second line.
 */

The above is a question, just state what you're doing:

/*
 * Check if we have an adaptive keyboard, like on the
 * Lenovo Carbon X1 2014 (2nd Gen).
 */

> +	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
> +		if ((hkeyv >> 8) == 2)
> +			tp_features.has_adaptive_kbd = true;
> +	}
> +
>  	quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
>  				     ARRAY_SIZE(tpacpi_hotkey_qtable));
>  
> @@ -3834,28 +3842,22 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
>  
>  static void hotkey_suspend(void)
>  {
> -	int hkeyv;
> -
>  	/* Do these on suspend, we get the events on early resume! */
>  	hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
>  	hotkey_autosleep_ack = 0;
>  
>  	/* save previous mode of adaptive keyboard of X1 Carbon */
> -	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
> -		if ((hkeyv >> 8) == 2) {
> -			if (!acpi_evalf(hkey_handle,
> -						&adaptive_keyboard_prev_mode,
> -						"GTRW", "dd", 0)) {
> -				pr_err("Cannot read adaptive keyboard mode.\n");
> -			}
> +	if (tp_features.has_adaptive_kbd) {
> +		if (!acpi_evalf(hkey_handle,
> +					&adaptive_keyboard_prev_mode,
> +					"GTRW", "dd", 0)) {
> +			pr_err("Cannot read adaptive keyboard mode.\n");
>  		}
>  	}
>  }
>  
>  static void hotkey_resume(void)
>  {
> -	int hkeyv;
> -
>  	tpacpi_disable_brightness_delay();
>  
>  	if (hotkey_status_set(true) < 0 ||
> @@ -3870,14 +3872,12 @@ static void hotkey_resume(void)
>  	hotkey_poll_setup_safe(false);
>  
>  	/* restore previous mode of adapive keyboard of X1 Carbon */
> -	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
> -		if ((hkeyv >> 8) == 2) {
> -			if (!acpi_evalf(hkey_handle,
> -						NULL,
> -						"STRW", "vd",
> -						adaptive_keyboard_prev_mode)) {
> -				pr_err("Cannot set adaptive keyboard mode.\n");
> -			}
> +	if (tp_features.has_adaptive_kbd) {
> +		if (!acpi_evalf(hkey_handle,
> +					NULL,
> +					"STRW", "vd",
> +					adaptive_keyboard_prev_mode)) {

You've saved a level of indentation, please group the arguments into fewer
lines, should be two instead of four.

Otherwise, looks good.

-- 
Darren Hart
Intel Open Source Technology Center
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