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Date: Fri, 05 Aug 2022 10:31:00 +1200
From: Luke Jones <luke@...nes.dev>
To: Hans de Goede <hdegoede@...hat.com>
Cc: markgross@...nel.org, platform-driver-x86@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] asus-wmi: Add support for TUF laptop keyboard
states
Hi Hans,
Thanks for the valuable review,
On Thu, Aug 4 2022 at 15:22:00 +0200, Hans de Goede
<hdegoede@...hat.com> wrote:
> Hi Luke,
>
> On 8/4/22 01:13, Luke D. Jones wrote:
>> Adds support for the TUF series laptop power states. This means
>> control of if the LED's are on while awake, or an animation is
>> shown while booting or suspended.
>>
>> /sys/devices/platform/asus-nb-wmi/tuf_krgb_state_index provides
>> labels for the index fields as "save boot awake sleep keyboard"
>>
>> /sys/devices/platform/asus-nb-wmi/tuf_krgb_state has the following
>> as input options via boolean "b b b b b":
>> - Save or set, if set, then settings revert on cold boot
>> - Boot, if true, the keyboard displays animation on boot
>> - Awake, if true, the keyboard LED's are on while device is awake
>> - Sleep, if true, the keyboard shows animation while device is
>> suspended
>> - Keybaord, appears to have no effect
>
> Keybaord typo / spelling issue.
>
> Please make this an extra attribute for the led_class_device,
> you can do this by adding this attribute to a separate
> attribute_group, lets say e.g. "tuf_rgb_attributes" and then
> in the "[PATCH] asus-wmi: Add support for TUF laptop keyboard RGB"
> code add:
>
> mc_cdev->led_cdev.groups = tuf_rgb_attributes;
>
> and then the "tuf_krgb_state" file should show up as:
> /sys/class/leds/asus::multicolour/tuf_krgb_state
Oh this is very cool! I was honestly wondering about if that could be
done but was unsure how and finding the right docs isn't always easy.
>
> Also I'm not sure what to think of the tuf_krgb_state_index file,
> having a sysfs file just to show some help text feels weird / wrong.
I modelled that after the multicolor version in led-class-multicolor.c:
static ssize_t multi_index_show(struct device *dev,
struct device_attribute *multi_index_attr,
char *buf)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct led_classdev_mc *mcled_cdev = lcdev_to_mccdev(led_cdev);
int len = 0;
int index;
int i;
for (i = 0; i < mcled_cdev->num_colors; i++) {
index = mcled_cdev->subled_info[i].color_index;
len += sprintf(buf + len, "%s", led_colors[index]);
if (i < mcled_cdev->num_colors - 1)
len += sprintf(buf + len, " ");
}
buf[len++] = '\n';
return len;
}
static DEVICE_ATTR_RO(multi_index);
Since it was done there it seemed okay?
>
> Please instead document the expected format in the existing:
> Documentation/ABI/testing/sysfs-platform-asus-wmi
>
> file; and talking about that file, it seems that this file
> could use some love to document other recently addes asus-wmi
> features too.
>
Oof, yep I'll hop on that.
> Related to the tuf_krgb_state_index file, please use the
> new sysfs_emit helper for all new show functions. And bonus
> points for a patch (series?) converting old show functions
> over to it.
For sure I'll do both. I guess this will turn in to a series of
patches now. If only I could get paid for the work..
Many thanks,
Luke.
>
> Regards,
>
> Hans
>
>
>
>
>
>> Signed-off-by: Luke D. Jones <luke@...nes.dev>
>> ---
>> drivers/platform/x86/asus-wmi.c | 95
>> ++++++++++++++++++++++
>> include/linux/platform_data/x86/asus-wmi.h | 3 +
>> 2 files changed, 98 insertions(+)
>>
>> diff --git a/drivers/platform/x86/asus-wmi.c
>> b/drivers/platform/x86/asus-wmi.c
>> index 0e7fbed8a50d..bbfb054ff3b2 100644
>> --- a/drivers/platform/x86/asus-wmi.c
>> +++ b/drivers/platform/x86/asus-wmi.c
>> @@ -234,6 +234,8 @@ struct asus_wmi {
>> bool dgpu_disable_available;
>> bool dgpu_disable;
>>
>> + bool tuf_krgb_state_available;
>> +
>> bool throttle_thermal_policy_available;
>> u8 throttle_thermal_policy_mode;
>>
>> @@ -734,6 +736,86 @@ static ssize_t egpu_enable_store(struct device
>> *dev,
>>
>> static DEVICE_ATTR_RW(egpu_enable);
>>
>> +/* TUF Laptop Keyboard RGB States
>> *********************************************/
>> +static int tuf_krgb_state_check_present(struct asus_wmi *asus)
>> +{
>> + u32 result;
>> + int err;
>> +
>> + asus->tuf_krgb_state_available = false;
>> +
>> + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_STATE,
>> &result);
>> + if (err) {
>> + if (err == -ENODEV)
>> + return 0;
>> + return err;
>> + }
>> +
>> + if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
>> + asus->tuf_krgb_state_available = true;
>> +
>> + return 0;
>> +}
>> +
>> +static ssize_t tuf_krgb_state_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf, size_t count)
>> +{
>> + int err;
>> + u32 ret;
>> + bool tmp;
>> + char *data, *part, *end;
>> + u8 save, flags, res, arg_num;
>> +
>> + save = flags = arg_num = 0;
>> + data = end = kstrdup(buf, GFP_KERNEL);
>> +
>> + while ((part = strsep(&end, " ")) != NULL) {
>> + if (part == NULL)
>> + return -1;
>> +
>> + res = kstrtobool(part, &tmp);
>> + if (res)
>> + return -1;
>> +
>> + if (tmp) {
>> + if (arg_num == 0) // save : set
>> + save = tmp == 0 ? 0x0100 : 0x0000;
>> + else if (arg_num == 1)
>> + flags |= 0x02; // boot
>> + else if (arg_num == 2)
>> + flags |= 0x08; // awake
>> + else if (arg_num == 3)
>> + flags |= 0x20; // sleep
>> + else if (arg_num == 4)
>> + flags |= 0x80; // keyboard
>> + }
>> +
>> + arg_num += 1;
>> + }
>> +
>> + err = asus_wmi_evaluate_method3(ASUS_WMI_METHODID_DEVS,
>> + ASUS_WMI_DEVID_TUF_RGB_STATE, 0xBD | save | (flags << 16), 0,
>> &ret);
>> + if (err) {
>> + return err;
>> + }
>> +
>> + kfree(data);
>> + return count;
>> +}
>> +
>> +static DEVICE_ATTR_WO(tuf_krgb_state);
>> +
>> +static ssize_t tuf_krgb_state_index_show(struct device *device,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + int len = sprintf(buf, "%s", "save boot awake sleep keyboard\n");
>> + return len;
>> +}
>> +
>> +static DEVICE_ATTR_RO(tuf_krgb_state_index);
>> +
>> /* Battery
>> ********************************************************************/
>>
>> /* The battery maximum charging percentage */
>> @@ -3258,6 +3340,8 @@ static struct attribute
>> *platform_attributes[] = {
>> &dev_attr_touchpad.attr,
>> &dev_attr_egpu_enable.attr,
>> &dev_attr_dgpu_disable.attr,
>> + &dev_attr_tuf_krgb_state.attr,
>> + &dev_attr_tuf_krgb_state_index.attr,
>> &dev_attr_lid_resume.attr,
>> &dev_attr_als_enable.attr,
>> &dev_attr_fan_boost_mode.attr,
>> @@ -3286,6 +3370,12 @@ static umode_t asus_sysfs_is_visible(struct
>> kobject *kobj,
>> devid = ASUS_WMI_DEVID_ALS_ENABLE;
>> else if (attr == &dev_attr_egpu_enable.attr)
>> ok = asus->egpu_enable_available;
>> + else if (attr == &dev_attr_tuf_krgb_state.attr)
>> + ok = asus->tuf_krgb_state_available;
>> + else if (attr == &dev_attr_tuf_krgb_state_index.attr)
>> + ok = asus->tuf_krgb_state_available;
>> + else if (attr == &dev_attr_dgpu_disable.attr)
>> + ok = asus->dgpu_disable_available;
>> else if (attr == &dev_attr_dgpu_disable.attr)
>> ok = asus->dgpu_disable_available;
>> else if (attr == &dev_attr_fan_boost_mode.attr)
>> @@ -3557,6 +3647,10 @@ static int asus_wmi_add(struct
>> platform_device *pdev)
>> if (err)
>> goto fail_dgpu_disable;
>>
>> + err = tuf_krgb_state_check_present(asus);
>> + if (err)
>> + goto fail_tuf_krgb_state;
>> +
>> err = fan_boost_mode_check_present(asus);
>> if (err)
>> goto fail_fan_boost_mode;
>> @@ -3671,6 +3765,7 @@ static int asus_wmi_add(struct
>> platform_device *pdev)
>> fail_fan_boost_mode:
>> fail_egpu_enable:
>> fail_dgpu_disable:
>> +fail_tuf_krgb_state:
>> fail_platform:
>> fail_panel_od:
>> kfree(asus);
>> diff --git a/include/linux/platform_data/x86/asus-wmi.h
>> b/include/linux/platform_data/x86/asus-wmi.h
>> index a571b47ff362..a95b37385e66 100644
>> --- a/include/linux/platform_data/x86/asus-wmi.h
>> +++ b/include/linux/platform_data/x86/asus-wmi.h
>> @@ -98,6 +98,9 @@
>> /* dgpu on/off */
>> #define ASUS_WMI_DEVID_DGPU 0x00090020
>>
>> +/* TUF laptop RGB power/state */
>> +#define ASUS_WMI_DEVID_TUF_RGB_STATE 0x00100057
>> +
>> /* DSTS masks */
>> #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
>> #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
>
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