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Subject: Re: [PATCH -next] drm/radeon/radeon_pm: use DEVICE_ATTR_RW macro
To:     Alex Deucher <alexdeucher@gmail.com>,
        YueHaibing <yuehaibing@huawei.com>
Cc:     Dave Airlie <airlied@linux.ie>, xinhui pan <Xinhui.Pan@amd.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Daniel Vetter <daniel@ffwll.ch>,
        "Deucher, Alexander" <alexander.deucher@amd.com>,
        Christian Koenig <christian.koenig@amd.com>
References: <20210528070217.9204-1-yuehaibing@huawei.com>
 <CADnq5_M2dSDqafpgEvuaRZRHk1j0=obTyYcYX0GGRGiBzs5eMQ@mail.gmail.com>
From:   =?UTF-8?Q?Christian_K=c3=b6nig?= <ckoenig.leichtzumerken@gmail.com>
Message-ID: <39b4c939-9f40-3e44-13d8-f98b01808d05@gmail.com>
Date:   Wed, 2 Jun 2021 08:41:31 +0200
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Am 02.06.21 um 03:53 schrieb Alex Deucher:
> On Fri, May 28, 2021 at 3:18 AM YueHaibing <yuehaibing@huawei.com> wrote:
>> Use DEVICE_ATTR_RW() helper instead of plain DEVICE_ATTR(),
>> which makes the code a bit shorter and easier to read.
>>
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> I'm not convinced this really buys us anything other than code churn,
> but I don't have a particularly strong opinion of others feel
> differently.

I agree, especially dropping the amdgpu prefix from the functions 
doesn't sound like something we want.

Christian.

>
> Alex
>
>
>> ---
>>   drivers/gpu/drm/radeon/radeon_pm.c | 56 ++++++++++++------------------
>>   1 file changed, 23 insertions(+), 33 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
>> index 3861c0b98fcf..edf10cc3947e 100644
>> --- a/drivers/gpu/drm/radeon/radeon_pm.c
>> +++ b/drivers/gpu/drm/radeon/radeon_pm.c
>> @@ -352,9 +352,8 @@ static void radeon_pm_print_states(struct radeon_device *rdev)
>>          }
>>   }
>>
>> -static ssize_t radeon_get_pm_profile(struct device *dev,
>> -                                    struct device_attribute *attr,
>> -                                    char *buf)
>> +static ssize_t power_profile_show(struct device *dev,
>> +                                 struct device_attribute *attr, char *buf)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -366,10 +365,8 @@ static ssize_t radeon_get_pm_profile(struct device *dev,
>>                            (cp == PM_PROFILE_HIGH) ? "high" : "default");
>>   }
>>
>> -static ssize_t radeon_set_pm_profile(struct device *dev,
>> -                                    struct device_attribute *attr,
>> -                                    const char *buf,
>> -                                    size_t count)
>> +static ssize_t power_profile_store(struct device *dev, struct device_attribute *attr,
>> +                                  const char *buf, size_t count)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -406,9 +403,8 @@ static ssize_t radeon_set_pm_profile(struct device *dev,
>>          return count;
>>   }
>>
>> -static ssize_t radeon_get_pm_method(struct device *dev,
>> -                                   struct device_attribute *attr,
>> -                                   char *buf)
>> +static ssize_t power_method_show(struct device *dev,
>> +                                struct device_attribute *attr, char *buf)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -418,10 +414,9 @@ static ssize_t radeon_get_pm_method(struct device *dev,
>>                            (pm == PM_METHOD_PROFILE) ? "profile" : "dpm");
>>   }
>>
>> -static ssize_t radeon_set_pm_method(struct device *dev,
>> -                                   struct device_attribute *attr,
>> -                                   const char *buf,
>> -                                   size_t count)
>> +static ssize_t power_method_store(struct device *dev,
>> +                                 struct device_attribute *attr,
>> +                                 const char *buf, size_t count)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -462,9 +457,8 @@ static ssize_t radeon_set_pm_method(struct device *dev,
>>          return count;
>>   }
>>
>> -static ssize_t radeon_get_dpm_state(struct device *dev,
>> -                                   struct device_attribute *attr,
>> -                                   char *buf)
>> +static ssize_t power_dpm_state_show(struct device *dev,
>> +                                   struct device_attribute *attr, char *buf)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -475,10 +469,9 @@ static ssize_t radeon_get_dpm_state(struct device *dev,
>>                            (pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
>>   }
>>
>> -static ssize_t radeon_set_dpm_state(struct device *dev,
>> -                                   struct device_attribute *attr,
>> -                                   const char *buf,
>> -                                   size_t count)
>> +static ssize_t power_dpm_state_store(struct device *dev,
>> +                                    struct device_attribute *attr,
>> +                                    const char *buf, size_t count)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -506,9 +499,9 @@ static ssize_t radeon_set_dpm_state(struct device *dev,
>>          return count;
>>   }
>>
>> -static ssize_t radeon_get_dpm_forced_performance_level(struct device *dev,
>> -                                                      struct device_attribute *attr,
>> -                                                      char *buf)
>> +static ssize_t power_dpm_force_performance_level_show(struct device *dev,
>> +                                                     struct device_attribute *attr,
>> +                                                     char *buf)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -523,10 +516,9 @@ static ssize_t radeon_get_dpm_forced_performance_level(struct device *dev,
>>                            (level == RADEON_DPM_FORCED_LEVEL_LOW) ? "low" : "high");
>>   }
>>
>> -static ssize_t radeon_set_dpm_forced_performance_level(struct device *dev,
>> +static ssize_t power_dpm_force_performance_level_store(struct device *dev,
>>                                                         struct device_attribute *attr,
>> -                                                      const char *buf,
>> -                                                      size_t count)
>> +                                                      const char *buf, size_t count)
>>   {
>>          struct drm_device *ddev = dev_get_drvdata(dev);
>>          struct radeon_device *rdev = ddev->dev_private;
>> @@ -658,12 +650,10 @@ static ssize_t radeon_hwmon_get_pwm1(struct device *dev,
>>          return sprintf(buf, "%i\n", speed);
>>   }
>>
>> -static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
>> -static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
>> -static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, radeon_get_dpm_state, radeon_set_dpm_state);
>> -static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR,
>> -                  radeon_get_dpm_forced_performance_level,
>> -                  radeon_set_dpm_forced_performance_level);
>> +static DEVICE_ATTR_RW(power_profile);
>> +static DEVICE_ATTR_RW(power_method);
>> +static DEVICE_ATTR_RW(power_dpm_state);
>> +static DEVICE_ATTR_RW(power_dpm_force_performance_level);
>>
>>   static ssize_t radeon_hwmon_show_temp(struct device *dev,
>>                                        struct device_attribute *attr,
>> --
>> 2.17.1
>>
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