# \[PATCH 03/10\] video: pxafb: Remove cpufreq policy notifier

- Subsystems: FRAMEBUFFER LAYER, THE REST
- Maintainers: Helge Deller, Linus Torvalds
- List: linux-fbdev
- 2 messages, 2 authors
- Page: https://ratatoskr.run/linux-fbdev/2019/07/5656937/t

## \[PATCH 03/10\] video: pxafb: Remove cpufreq policy notifier

- From: Viresh Kumar \<viresh.kumar@linaro.org\>
- Date: 2019-07-16 09:55:08 
- Message: https://ratatoskr.run/linux-fbdev/2019/07/5656937.md

```text
The cpufreq policy notifier's CPUFREQ_ADJUST notification is going to
get removed soon.

The notifier callback pxafb_freq_policy() isn't doing anything apart
from printing a debug message on CPUFREQ_ADJUST notification. There is
no point in keeping an otherwise empty callback and registering the
notifier.

Remove it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/video/fbdev/pxafb.c | 21 ---------------------
 drivers/video/fbdev/pxafb.h |  1 -
 2 files changed, 22 deletions(-)

diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index 4282cb117b92..f70c9f79622e 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -1678,24 +1678,6 @@ pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
 	}
 	return 0;
 }
-
-static int
-pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
-{
-	struct pxafb_info *fbi = TO_INF(nb, freq_policy);
-	struct fb_var_screeninfo *var = &fbi->fb.var;
-	struct cpufreq_policy *policy = data;
-
-	switch (val) {
-	case CPUFREQ_ADJUST:
-		pr_debug("min dma period: %d ps, "
-			"new clock %d kHz\n", pxafb_display_dma_period(var),
-			policy->max);
-		/* TODO: fill in min/max values */
-		break;
-	}
-	return 0;
-}
 #endif
 
 #ifdef CONFIG_PM
@@ -2400,11 +2382,8 @@ static int pxafb_probe(struct platform_device *dev)
 
 #ifdef CONFIG_CPU_FREQ
 	fbi->freq_transition.notifier_call = pxafb_freq_transition;
-	fbi->freq_policy.notifier_call = pxafb_freq_policy;
 	cpufreq_register_notifier(&fbi->freq_transition,
 				CPUFREQ_TRANSITION_NOTIFIER);
-	cpufreq_register_notifier(&fbi->freq_policy,
-				CPUFREQ_POLICY_NOTIFIER);
 #endif
 
 	/*
diff --git a/drivers/video/fbdev/pxafb.h b/drivers/video/fbdev/pxafb.h
index b641289c8a99..86b1e9ab1a38 100644
--- a/drivers/video/fbdev/pxafb.h
+++ b/drivers/video/fbdev/pxafb.h
@@ -162,7 +162,6 @@ struct pxafb_info {
 
 #ifdef CONFIG_CPU_FREQ
 	struct notifier_block	freq_transition;
-	struct notifier_block	freq_policy;
 #endif
 
 	struct regulator *lcd_supply;
-- 
2.21.0.rc0.269.g1a574e7a288b
```

## Re: \[PATCH 03/10\] video: pxafb: Remove cpufreq policy notifier

- From: Bartlomiej Zolnierkiewicz \<hidden\>
- Date: 2019-07-16 12:26:29 
- Message: https://ratatoskr.run/linux-fbdev/2019/07/5657041.md

```text

On 7/16/19 11:54 AM, Viresh Kumar wrote:
> The cpufreq policy notifier's CPUFREQ_ADJUST notification is going to
> get removed soon.
> 
> The notifier callback pxafb_freq_policy() isn't doing anything apart
> from printing a debug message on CPUFREQ_ADJUST notification. There is
> no point in keeping an otherwise empty callback and registering the
> notifier.
> 
> Remove it.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Acked-by: Bartlomiej Zolnierkiewicz <redacted>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
```