Date: Mon, 24 Jun 2024 11:04:42 +0100
From: Mohamed Ghanmi <mohamed.ghanmi@...com.tn>
To: Luke Jones <luke@...nes.dev>
Cc: Hans de Goede <hdegoede@...hat.com>, corentin.chary@...il.com,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/1] platform/x86: asus-wmi: add support for vivobook
 fan profiles

On Tue, Jun 11, 2024 at 05:31:46PM +1200, Luke Jones wrote:
> 
> 
> On Mon, 10 Jun 2024, at 2:48 AM, Mohamed Ghanmi wrote:
> > Add support for vivobook fan profiles wmi call on the ASUS VIVOBOOK
> > to adjust power limits.
> > 
> > These fan profiles have a different device id than the ROG series
> > and different order. This reorders the existing modes.
> > 
> > As part of keeping the patch clean the throttle_thermal_policy_available
> > boolean stored in the driver struct is removed and
> > throttle_thermal_policy_dev is used in place (as on init it is zeroed).
> > 
> > Signed-off-by: Mohamed Ghanmi <mohamed.ghanmi@...com.tn>
> > Co-developed-by: Luke D. Jones <luke@...nes.dev>
> > Signed-off-by: Luke D. Jones <luke@...nes.dev>
> > ---
> > drivers/platform/x86/asus-wmi.c            | 125 ++++++++++++---------
> > include/linux/platform_data/x86/asus-wmi.h |   1 +
> > 2 files changed, 76 insertions(+), 50 deletions(-)
> > 
> > diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> > index 3c61d75a3..2e3d8d8fb 100644
> > --- a/drivers/platform/x86/asus-wmi.c
> > +++ b/drivers/platform/x86/asus-wmi.c
> > @@ -97,6 +97,12 @@ module_param(fnlock_default, bool, 0444);
> > #define ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST 1
> > #define ASUS_THROTTLE_THERMAL_POLICY_SILENT 2
> >  
> > +#define ASUS_THROTTLE_THERMAL_POLICY_DEFAULT_VIVO 0
> > +#define ASUS_THROTTLE_THERMAL_POLICY_SILENT_VIVO 1
> > +#define ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST_VIVO 2
> > +
> > +#define PLATFORM_PROFILE_MAX 2
> > +
> > #define USB_INTEL_XUSB2PR 0xD0
> > #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
> >  
> > @@ -293,8 +299,8 @@ struct asus_wmi {
> > u32 kbd_rgb_dev;
> > bool kbd_rgb_state_available;
> >  
> > - bool throttle_thermal_policy_available;
> > u8 throttle_thermal_policy_mode;
> > + u32 throttle_thermal_policy_dev;
> >  
> > bool cpu_fan_curve_available;
> > bool gpu_fan_curve_available;
> > @@ -3152,7 +3158,7 @@ static int fan_curve_get_factory_default(struct asus_wmi *asus, u32 fan_dev)
> > int err, fan_idx;
> > u8 mode = 0;
> >  
> > - if (asus->throttle_thermal_policy_available)
> > + if (asus->throttle_thermal_policy_dev)
> > mode = asus->throttle_thermal_policy_mode;
> > /* DEVID_<C/G>PU_FAN_CURVE is switched for OVERBOOST vs SILENT */
> > if (mode == 2)
> > @@ -3359,7 +3365,7 @@ static ssize_t fan_curve_enable_store(struct device *dev,
> > * For machines with throttle this is the only way to reset fans
> > * to default mode of operation (does not erase curve data).
> > */
> > - if (asus->throttle_thermal_policy_available) {
> > + if (asus->throttle_thermal_policy_dev) {
> > err = throttle_thermal_policy_write(asus);
> > if (err)
> > return err;
> > @@ -3576,8 +3582,8 @@ static const struct attribute_group asus_fan_curve_attr_group = {
> > __ATTRIBUTE_GROUPS(asus_fan_curve_attr);
> >  
> > /*
> > - * Must be initialised after throttle_thermal_policy_check_present() as
> > - * we check the status of throttle_thermal_policy_available during init.
> > + * Must be initialised after throttle_thermal_policy_dev is set as
> > + * we check the status of throttle_thermal_policy_dev during init.
> >   */
> > static int asus_wmi_custom_fan_curve_init(struct asus_wmi *asus)
> > {
> > @@ -3618,38 +3624,13 @@ static int asus_wmi_custom_fan_curve_init(struct asus_wmi *asus)
> > }
> >  
> > /* Throttle thermal policy ****************************************************/
> > -
> > -static int throttle_thermal_policy_check_present(struct asus_wmi *asus)
> > -{
> > - u32 result;
> > - int err;
> > -
> > - asus->throttle_thermal_policy_available = false;
> > -
> > - err = asus_wmi_get_devstate(asus,
> > -     ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
> > -     &result);
> > - if (err) {
> > - if (err == -ENODEV)
> > - return 0;
> > - return err;
> > - }
> > -
> > - if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
> > - asus->throttle_thermal_policy_available = true;
> > -
> > - return 0;
> > -}
> > -
> > static int throttle_thermal_policy_write(struct asus_wmi *asus)
> > {
> > - int err;
> > - u8 value;
> > + u8 value = asus->throttle_thermal_policy_mode;
> > u32 retval;
> > + int err;
> >  
> > - value = asus->throttle_thermal_policy_mode;
> > -
> > - err = asus_wmi_set_devstate(ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
> > + err = asus_wmi_set_devstate(asus->throttle_thermal_policy_dev,
> >     value, &retval);
> >  
> > sysfs_notify(&asus->platform_device->dev.kobj, NULL,
> > @@ -3679,7 +3660,7 @@ static int throttle_thermal_policy_write(struct asus_wmi *asus)
> >  
> > static int throttle_thermal_policy_set_default(struct asus_wmi *asus)
> > {
> > - if (!asus->throttle_thermal_policy_available)
> > + if (!asus->throttle_thermal_policy_dev)
> > return 0;
> >  
> > asus->throttle_thermal_policy_mode = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
> > @@ -3691,7 +3672,7 @@ static int throttle_thermal_policy_switch_next(struct asus_wmi *asus)
> > u8 new_mode = asus->throttle_thermal_policy_mode + 1;
> > int err;
> >  
> > - if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
> > + if (new_mode > PLATFORM_PROFILE_MAX)
> > new_mode = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
> >  
> > asus->throttle_thermal_policy_mode = new_mode;
> > @@ -3730,7 +3711,7 @@ static ssize_t throttle_thermal_policy_store(struct device *dev,
> > if (result < 0)
> > return result;
> >  
> > - if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
> > + if (new_mode > PLATFORM_PROFILE_MAX)
> > return -EINVAL;
> >  
> > asus->throttle_thermal_policy_mode = new_mode;
> > @@ -3747,10 +3728,56 @@ static ssize_t throttle_thermal_policy_store(struct device *dev,
> > return count;
> > }
> >  
> > -// Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
> > +/*
> > + * Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
> > + */
> > static DEVICE_ATTR_RW(throttle_thermal_policy);
> >  
> > /* Platform profile ***********************************************************/
> > +static int asus_wmi_platform_profile_to_vivo(struct asus_wmi *asus,
> > +   int mode)
> 
> Given the internals of this function I'm still not sure if this naming makes sense. Perhaps "maybe_platform_profile_to_vivo()"
>
you're right. this function doesn't only remap to vivo but if the laptop
is a not a vivo (in our case a ROG) it doesn't change the mapping.

The way I see it is that there is a logical mapping (the ROG mode
mapping) which is stored in the asus_wmi struct and a physical mapping
that is used when writing to the acpi device (the vivo in this case). 
so maybe naming them asus_wmi_platform_profile_from_logical_mapping() 
and asus_wmi_platform_profile_to_logical_mapping() is a better naming.
in the future there will be other device ids for different laptops.

sorry for the late reply
> > +{
> > + bool vivo;
> > +
> > + vivo = asus->throttle_thermal_policy_dev == ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO;
> > +
> > + if (vivo) {
> > + switch (mode) {
> > + case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT:
> > + return ASUS_THROTTLE_THERMAL_POLICY_DEFAULT_VIVO;
> > + case ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST:
> > + return ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST_VIVO;
> > + case ASUS_THROTTLE_THERMAL_POLICY_SILENT:
> > + return ASUS_THROTTLE_THERMAL_POLICY_SILENT_VIVO;
> > + }
> > + }
> > +
> > + return mode;
> > +
> > +}
> > +
> > +static int asus_wmi_platform_profile_mode_from_vivo(struct asus_wmi *asus,
> > +   int mode)
> 
> Same as the last function.
> 
same as the above
> > +{
> > + bool vivo;
> > +
> > + vivo = asus->throttle_thermal_policy_dev == ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO;
> > +
> > + if (vivo) {
> > + switch (mode) {
> > + case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT_VIVO:
> > + return ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
> > + case ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST_VIVO:
> > + return ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST;
> > + case ASUS_THROTTLE_THERMAL_POLICY_SILENT_VIVO:
> > + return ASUS_THROTTLE_THERMAL_POLICY_SILENT;
> > + }
> > + }
> > +
> > + return mode;
> > +
> > +}
> > +
> > static int asus_wmi_platform_profile_get(struct platform_profile_handler *pprof,
> > enum platform_profile_option *profile)
> > {
> > @@ -3758,10 +3785,9 @@ static int asus_wmi_platform_profile_get(struct platform_profile_handler *pprof,
> > int tp;
> >  
> > asus = container_of(pprof, struct asus_wmi, platform_profile_handler);
> > -
> > tp = asus->throttle_thermal_policy_mode;
> >  
> > - switch (tp) {
> > + switch (asus_wmi_platform_profile_mode_from_vivo(asus, tp)) {
> > case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT:
> > *profile = PLATFORM_PROFILE_BALANCED;
> > break;
> > @@ -3775,6 +3801,7 @@ static int asus_wmi_platform_profile_get(struct platform_profile_handler *pprof,
> > return -EINVAL;
> > }
> >  
> > +
> > return 0;
> > }
> >  
> > @@ -3800,7 +3827,7 @@ static int asus_wmi_platform_profile_set(struct platform_profile_handler *pprof,
> > return -EOPNOTSUPP;
> > }
> >  
> > - asus->throttle_thermal_policy_mode = tp;
> > + asus->throttle_thermal_policy_mode = asus_wmi_platform_profile_to_vivo(asus, tp);
> > return throttle_thermal_policy_write(asus);
> > }
> >  
> > @@ -3813,7 +3840,7 @@ static int platform_profile_setup(struct asus_wmi *asus)
> > * Not an error if a component platform_profile relies on is unavailable
> > * so early return, skipping the setup of platform_profile.
> > */
> > - if (!asus->throttle_thermal_policy_available)
> > + if (!asus->throttle_thermal_policy_dev)
> > return 0;
> >  
> > dev_info(dev, "Using throttle_thermal_policy for platform_profile support\n");
> > @@ -4228,7 +4255,7 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
> > if (code == NOTIFY_KBD_FBM || code == NOTIFY_KBD_TTP) {
> > if (asus->fan_boost_mode_available)
> > fan_boost_mode_switch_next(asus);
> > - if (asus->throttle_thermal_policy_available)
> > + if (asus->throttle_thermal_policy_dev)
> > throttle_thermal_policy_switch_next(asus);
> > return;
> >  
> > @@ -4436,7 +4463,7 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
> > else if (attr == &dev_attr_fan_boost_mode.attr)
> > ok = asus->fan_boost_mode_available;
> > else if (attr == &dev_attr_throttle_thermal_policy.attr)
> > - ok = asus->throttle_thermal_policy_available;
> > + ok = asus->throttle_thermal_policy_dev != 0;
> > else if (attr == &dev_attr_ppt_pl2_sppt.attr)
> > devid = ASUS_WMI_DEVID_PPT_PL2_SPPT;
> > else if (attr == &dev_attr_ppt_pl1_spl.attr)
> > @@ -4745,16 +4772,15 @@ static int asus_wmi_add(struct platform_device *pdev)
> > else if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE2))
> > asus->kbd_rgb_dev = ASUS_WMI_DEVID_TUF_RGB_MODE2;
> >  
> > + if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY))
> > + asus->throttle_thermal_policy_dev = ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY;
> > + else if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO))
> > + asus->throttle_thermal_policy_dev = ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO;
> > +
> > err = fan_boost_mode_check_present(asus);
> > if (err)
> > goto fail_fan_boost_mode;
> >  
> > - err = throttle_thermal_policy_check_present(asus);
> > - if (err)
> > - goto fail_throttle_thermal_policy;
> > - else
> > - throttle_thermal_policy_set_default(asus);
> > -
> > err = platform_profile_setup(asus);
> > if (err)
> > goto fail_platform_profile_setup;
> > @@ -4849,7 +4875,6 @@ static int asus_wmi_add(struct platform_device *pdev)
> > fail_input:
> > asus_wmi_sysfs_exit(asus->platform_device);
> > fail_sysfs:
> > -fail_throttle_thermal_policy:
> > fail_custom_fan_curve:
> > fail_platform_profile_setup:
> > if (asus->platform_profile_support)
> > diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> > index 3eb5cd677..982a63774 100644
> > --- a/include/linux/platform_data/x86/asus-wmi.h
> > +++ b/include/linux/platform_data/x86/asus-wmi.h
> > @@ -64,6 +64,7 @@
> > #define ASUS_WMI_DEVID_SCREENPAD_LIGHT 0x00050032
> > #define ASUS_WMI_DEVID_FAN_BOOST_MODE 0x00110018
> > #define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY 0x00120075
> > +#define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO 0x00110019
> >  
> > /* Misc */
> > #define ASUS_WMI_DEVID_PANEL_OD 0x00050019
> > -- 
> > 2.44.0
> > 
>  
> If Hans and Ilpo don't have any requirements then:
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> 

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