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Message-ID: <CADnq5_M2dSDqafpgEvuaRZRHk1j0=obTyYcYX0GGRGiBzs5eMQ@mail.gmail.com>
Date: Tue, 1 Jun 2021 21:53:12 -0400
From: Alex Deucher <alexdeucher@...il.com>
To: YueHaibing <yuehaibing@...wei.com>
Cc: "Deucher, Alexander" <alexander.deucher@....com>,
Christian Koenig <christian.koenig@....com>,
xinhui pan <Xinhui.Pan@....com>,
Dave Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Maling list - DRI developers
<dri-devel@...ts.freedesktop.org>,
amd-gfx list <amd-gfx@...ts.freedesktop.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] drm/radeon/radeon_pm: use DEVICE_ATTR_RW macro
On Fri, May 28, 2021 at 3:18 AM YueHaibing <yuehaibing@...wei.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@...wei.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.
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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