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Message-ID: <d1ec4c78-0b1e-28ec-7324-806b29ed77c9@linux.intel.com>
Date: Tue, 2 Apr 2024 13:43:25 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: "Luke D. Jones" <luke@...nes.dev>
cc: Hans de Goede <hdegoede@...hat.com>, corentin.chary@...il.com,
platform-driver-x86@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/9] platform/x86: asus-wmi: add support for 2024 ROG
Mini-LED
On Tue, 2 Apr 2024, Luke D. Jones wrote:
> Support the 2024 mini-led backlight and adjust the related functions
> to select the relevant dev-id. Also add `available_mini_led_mode` to the
> platform sysfs since the available mini-led levels can be different.
>
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
> .../ABI/testing/sysfs-platform-asus-wmi | 8 ++
> drivers/platform/x86/asus-wmi.c | 80 ++++++++++++++++---
> include/linux/platform_data/x86/asus-wmi.h | 1 +
> 3 files changed, 78 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> index 8a7e25bde085..ef1ac1a20a71 100644
> --- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
> +++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> @@ -126,6 +126,14 @@ Description:
> Change the mini-LED mode:
> * 0 - Single-zone,
> * 1 - Multi-zone
> + * 2 - Multi-zone strong (available on newer generation mini-led)
> +
> +What: /sys/devices/platform/<platform>/available_mini_led_mode
> +Date: Apr 2024
> +KernelVersion: 6.10
> +Contact: "Luke Jones" <luke@...nes.dev>
> +Description:
> + List the available mini-led modes.
>
> What: /sys/devices/platform/<platform>/ppt_pl1_spl
> Date: Jun 2023
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 3f07bbf809ef..2330f02ff76f 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -288,7 +288,7 @@ struct asus_wmi {
> bool battery_rsoc_available;
>
> bool panel_overdrive_available;
> - bool mini_led_mode_available;
> + u32 mini_led_dev_id;
>
> struct hotplug_slot hotplug_slot;
> struct mutex hotplug_lock;
> @@ -2108,13 +2108,30 @@ static ssize_t mini_led_mode_show(struct device *dev,
> struct device_attribute *attr, char *buf)
> {
> struct asus_wmi *asus = dev_get_drvdata(dev);
> - int result;
> + u32 value;
>
> - result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_MINI_LED_MODE);
> - if (result < 0)
> - return result;
> + asus_wmi_get_devstate(asus, asus->mini_led_dev_id, &value);
Error handling missing.
> + value = value & 0x03; // only 3 modes on 2024 version
Add #define XX GENMASK(1, 0) for this.
>
> - return sysfs_emit(buf, "%d\n", result);
> + /* Remap the mode values to match previous generation mini-led.
> + * Some BIOSes return -19 instead of 2, which is "mini-LED off", this
> + * appears to be a BIOS bug.
Is this comment still 100% valid now or should it be removed completely?
There's no handling for -19 in ASUS_WMI_DEVID_MINI_LED_MODE2 block?
There's also a double space in the comment.
> + */
> + if (asus->mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2) {
> + switch (value) {
> + case 0:
> + value = 1;
> + break;
> + case 1:
> + value = 2;
> + break;
> + case 2:
> + value = 0;
Add break here too.
These literals 0-2 should be named with #defines as it would make the code
readable, current way of the mapping between literal numbers
unintelligible magic.
> + }
> + } else if (value < 0) {
This will never be true because value is u32 and also because of & 0x03
even if you'd change the type.
I don't quite follow what you're trying to do here. Why this only applies
to cases != ASUS_WMI_DEVID_MINI_LED_MODE2?
> + return value;
> + }
> + return sysfs_emit(buf, "%d\n", value);
> }
>
> static ssize_t mini_led_mode_store(struct device *dev,
> @@ -2130,11 +2147,28 @@ static ssize_t mini_led_mode_store(struct device *dev,
> if (result)
> return result;
>
> - if (mode > 1)
> + if (mode > 1 && asus->mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE)
> return -EINVAL;
> + if (mode > 2 && asus->mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2)
> + return -EINVAL;
> + /*
> + * Remap the mode values so expected behaviour is the same as the last
> + * generation of mini-LED
Missing .
--
i.
> + */
> + if (asus->mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2) {
> + switch (mode) {
> + case 0:
> + mode = 2;
> + break;
> + case 1:
> + mode = 0;
> + break;
> + case 2:
> + mode = 1;
> + }
> + }
>
> - err = asus_wmi_set_devstate(ASUS_WMI_DEVID_MINI_LED_MODE, mode, &result);
> -
> + err = asus_wmi_set_devstate(asus->mini_led_dev_id, mode, &result);
> if (err) {
> pr_warn("Failed to set mini-LED: %d\n", err);
> return err;
> @@ -2151,6 +2185,23 @@ static ssize_t mini_led_mode_store(struct device *dev,
> }
> static DEVICE_ATTR_RW(mini_led_mode);
>
> +static ssize_t available_mini_led_mode_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct asus_wmi *asus = dev_get_drvdata(dev);
> +
> + switch (asus->mini_led_dev_id) {
> + case ASUS_WMI_DEVID_MINI_LED_MODE:
> + return sysfs_emit(buf, "0 1\n");
> + case ASUS_WMI_DEVID_MINI_LED_MODE2:
> + return sysfs_emit(buf, "0 1 2\n");
> + }
> +
> + return sysfs_emit(buf, "0\n");
> +}
> +
> +static DEVICE_ATTR_RO(available_mini_led_mode);
> +
> /* Quirks *********************************************************************/
>
> static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
> @@ -4139,6 +4190,7 @@ static struct attribute *platform_attributes[] = {
> &dev_attr_nv_temp_target.attr,
> &dev_attr_panel_od.attr,
> &dev_attr_mini_led_mode.attr,
> + &dev_attr_available_mini_led_mode.attr,
> NULL
> };
>
> @@ -4191,7 +4243,9 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
> else if (attr == &dev_attr_panel_od.attr)
> ok = asus->panel_overdrive_available;
> else if (attr == &dev_attr_mini_led_mode.attr)
> - ok = asus->mini_led_mode_available;
> + ok = asus->mini_led_dev_id != 0;
> + else if (attr == &dev_attr_available_mini_led_mode.attr)
> + ok = asus->mini_led_dev_id != 0;
>
> if (devid != -1)
> ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
> @@ -4444,10 +4498,14 @@ static int asus_wmi_add(struct platform_device *pdev)
> asus->nv_dyn_boost_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_NV_DYN_BOOST);
> asus->nv_temp_tgt_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_NV_THERM_TARGET);
> asus->panel_overdrive_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_PANEL_OD);
> - asus->mini_led_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MINI_LED_MODE);
> asus->ally_mcu_usb_switch = acpi_has_method(NULL, ASUS_USB0_PWR_EC0_CSEE)
> && dmi_match(DMI_BOARD_NAME, "RC71L");
>
> + if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MINI_LED_MODE))
> + asus->mini_led_dev_id = ASUS_WMI_DEVID_MINI_LED_MODE;
> + else if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MINI_LED_MODE2))
> + asus->mini_led_dev_id = ASUS_WMI_DEVID_MINI_LED_MODE2;
> +
> err = fan_boost_mode_check_present(asus);
> if (err)
> goto fail_fan_boost_mode;
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index ab1c7deff118..9cadce10ad9a 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -71,6 +71,7 @@
> #define ASUS_WMI_DEVID_LID_FLIP 0x00060062
> #define ASUS_WMI_DEVID_LID_FLIP_ROG 0x00060077
> #define ASUS_WMI_DEVID_MINI_LED_MODE 0x0005001E
> +#define ASUS_WMI_DEVID_MINI_LED_MODE2 0x0005002E
>
> /* Storage */
> #define ASUS_WMI_DEVID_CARDREADER 0x00080013
>
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