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Date: Fri, 13 Aug 2021 19:20:29 +1200
From: Luke Jones <luke@...nes.dev>
To: Hans de Goede <hdegoede@...hat.com>
Cc: linux-kernel@...r.kernel.org, hadess@...ess.net,
platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] asus-wmi: Add support for platform_profile
On Fri, Aug 13 2021 at 08:47:56 +0200, Hans de Goede
<hdegoede@...hat.com> wrote:
> Hi Luke,
>
> Thank you for this patch, it is great to see more and more laptop
> models getting support for the standard platform_profile userspace
> API.
>
> On 8/13/21 4:42 AM, Luke D. Jones wrote:
>> Add initial support for platform_profile where the support is
>> based on availability of ASUS_THROTTLE_THERMAL_POLICY.
>>
>> Signed-off-by: Luke D. Jones <luke@...nes.dev>
>> ---
>> drivers/platform/x86/asus-wmi.c | 112
>> ++++++++++++++++++++++++++++++++
>> 1 file changed, 112 insertions(+)
>>
>> diff --git a/drivers/platform/x86/asus-wmi.c
>> b/drivers/platform/x86/asus-wmi.c
>> index 90a6a0d00deb..62260043c15c 100644
>> --- a/drivers/platform/x86/asus-wmi.c
>> +++ b/drivers/platform/x86/asus-wmi.c
>> @@ -26,6 +26,7 @@
>> #include <linux/rfkill.h>
>> #include <linux/pci.h>
>> #include <linux/pci_hotplug.h>
>> +#include <linux/platform_profile.h>
>> #include <linux/power_supply.h>
>> #include <linux/hwmon.h>
>> #include <linux/hwmon-sysfs.h>
>> @@ -219,6 +220,9 @@ struct asus_wmi {
>> bool throttle_thermal_policy_available;
>> u8 throttle_thermal_policy_mode;
>>
>> + struct platform_profile_handler platform_profile_handler;
>> + bool platform_profile_support;
>> +
>> // The RSOC controls the maximum charging percentage.
>> bool battery_rsoc_available;
>>
>> @@ -2144,6 +2148,106 @@ static ssize_t
>> throttle_thermal_policy_store(struct device *dev,
>> // Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
>> static DEVICE_ATTR_RW(throttle_thermal_policy);
>>
>> +/* Platform profile
>> ***********************************************************/
>> +static int platform_profile_get(struct platform_profile_handler
>> *pprof,
>> + enum platform_profile_option *profile)
>> +{
>> + struct asus_wmi *asus;
>> + int tp;
>> +
>> + asus = container_of(pprof, struct asus_wmi,
>> platform_profile_handler);
>> +
>> + /* All possible toggles like throttle_thermal_policy here */
>> + if (asus->throttle_thermal_policy_available) {
>> + tp = asus->throttle_thermal_policy_mode;
>> + } else {
>> + return -1;
>> + }
>> +
>> + if (tp < 0)
>> + return tp;
>> +
>> + switch (tp) {
>> + case ASUS_THROTTLE_THERMAL_POLICY_DEFAULT:
>> + *profile = PLATFORM_PROFILE_BALANCED;
>> + break;
>> + case ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST:
>> + *profile = PLATFORM_PROFILE_PERFORMANCE;
>> + break;
>> + case ASUS_THROTTLE_THERMAL_POLICY_SILENT:
>> + *profile = PLATFORM_PROFILE_QUIET;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int platform_profile_set(struct platform_profile_handler
>> *pprof,
>> + enum platform_profile_option profile)
>> +{
>> + struct asus_wmi *asus;
>> + int tp;
>> +
>> + asus = container_of(pprof, struct asus_wmi,
>> platform_profile_handler);
>> +
>> + /* All possible toggles like throttle_thermal_policy here */
>> + if (!asus->throttle_thermal_policy_available) {
>> + return -1;
>> + }
>> +
>> + switch (profile) {
>> + case PLATFORM_PROFILE_PERFORMANCE:
>> + tp = ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST;
>> + break;
>> + case PLATFORM_PROFILE_BALANCED:
>> + tp = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
>> + break;
>> + case PLATFORM_PROFILE_QUIET:
>> + tp = ASUS_THROTTLE_THERMAL_POLICY_SILENT;
>> + break;
>> + default:
>> + return -EOPNOTSUPP;
>> + }
>> +
>> + if (asus->throttle_thermal_policy_available) {
>
> You already check for asus->throttle_thermal_policy_available a couple
> of lines higher in this function and you return when it is not
> available ...
>
> I guess this was intended to also have a second if () for
> fan-boost mode ?
Yes, sorry I missed that. I'd initially looked at adding fan-boost also
but as it is *fans only* I didn't see the value in adding it. I've also
not seen any use of this in the wild bar one laptop which was likely to
be retired many months ago.
>
> Since you are not adding support for fan-boost mode at this time,
> it would be best (IMHO) to drop this second if for now and
> just take this path unconditionally.
>
Adjusted now.
>
>> + asus->throttle_thermal_policy_mode = tp;
>> + return throttle_thermal_policy_write(asus);
>> + }
>> + return 0;
>> +}
>> +
>> +static int platform_profile_setup(struct asus_wmi *asus)
>> +{
>> + int err;
>> +
>> + if (asus->throttle_thermal_policy_available) {
>> + pr_info("Using throttle_thermal_policy for platform_profile
>> support\n");
>> + } else {
>> + /*
>> + * Not an error if a component platform_profile relies on is
>> unavailable
>> + * so early return, skipping the setup of platform_profile.
>> + */
>> + return 0;
>> + }
>> + asus->platform_profile_handler.profile_get = platform_profile_get;
>> + asus->platform_profile_handler.profile_set = platform_profile_set;
>> +
>> + set_bit(PLATFORM_PROFILE_QUIET,
>> asus->platform_profile_handler.choices);
>> + set_bit(PLATFORM_PROFILE_BALANCED,
>> + asus->platform_profile_handler.choices);
>> + set_bit(PLATFORM_PROFILE_PERFORMANCE,
>> + asus->platform_profile_handler.choices);
>> +
>> + err = platform_profile_register(&asus->platform_profile_handler);
>> + if (err)
>> + return err;
>> +
>> + asus->platform_profile_support = true;
>> + return 0;
>> +}
>> +
>> /* Backlight
>> ******************************************************************/
>>
>> static int read_backlight_power(struct asus_wmi *asus)
>> @@ -2904,6 +3008,10 @@ static int asus_wmi_add(struct
>> platform_device *pdev)
>> else
>> throttle_thermal_policy_set_default(asus);
>>
>> + err = platform_profile_setup(asus);
>> + if (err)
>> + goto fail_platform_profile_setup;
>> +
>> err = panel_od_check_present(asus);
>> if (err)
>> goto fail_panel_od;
>> @@ -2993,6 +3101,7 @@ static int asus_wmi_add(struct
>> platform_device *pdev)
>> asus_wmi_sysfs_exit(asus->platform_device);
>> fail_sysfs:
>> fail_throttle_thermal_policy:
>> +fail_platform_profile_setup:
>> fail_fan_boost_mode:
>
> I think you need to add this:
>
> if (asus->platform_profile_support)
> platform_profile_remove();
>
> here so that if later fail-exit paths are taken the platform_profile
> support gets unregistered again.
Good catch, thanks! :)
Next version will come after some testing.
>
>> fail_egpu_enable:
>> fail_dgpu_disable:
>> @@ -3017,6 +3126,9 @@ static int asus_wmi_remove(struct
>> platform_device *device)
>> asus_fan_set_auto(asus);
>> asus_wmi_battery_exit(asus);
>>
>> + if (asus->platform_profile_support)
>> + platform_profile_remove();
>> +
>> kfree(asus);
>> return 0;
>> }
>>
>
> Regards,
>
> Hans
>
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