[PATCH] powermac: More powermac backlight fixes
This patch fixes several problems:
- The legacy backlight value might be set at interrupt time. Introduced
a worker to prevent it from directly calling the backlight code.
- via-pmu allows the backlight to be grabbed, in which case we need to
prevent other kernel code from changing the brightness.
- Don't send PMU requests in via-pmu-backlight when the machine is about
to sleep or waking up.
- More Kconfig fixes.
Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 06ca80b..ea38680 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -16,7 +16,6 @@
* a sleep or a freq. switch
* - Move sleep code out of here to pmac_pm, merge into new
* common PM infrastructure
- * - Move backlight code out as well
* - Save/Restore PCI space properly
*
*/
@@ -60,9 +59,7 @@
#include <asm/mmu_context.h>
#include <asm/cputable.h>
#include <asm/time.h>
-#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
-#endif
#include "via-pmu-event.h"
@@ -177,10 +174,6 @@
static struct adb_request batt_req;
static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
-#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
-extern int disable_kernel_backlight;
-#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
-
int __fake_sleep;
int asleep;
BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
@@ -466,7 +459,7 @@
#ifdef CONFIG_PMAC_BACKLIGHT
/* Initialize backlight */
- pmu_backlight_init(vias);
+ pmu_backlight_init();
#endif
#ifdef CONFIG_PPC32
@@ -1403,11 +1396,8 @@
else if ((1 << pirq) & PMU_INT_SNDBRT) {
#ifdef CONFIG_PMAC_BACKLIGHT
if (len == 3)
-#ifdef CONFIG_INPUT_ADBHID
- if (!disable_kernel_backlight)
-#endif /* CONFIG_INPUT_ADBHID */
- pmac_backlight_set_legacy_brightness(data[1] >> 4);
-#endif /* CONFIG_PMAC_BACKLIGHT */
+ pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
+#endif
}
/* Tick interrupt */
else if ((1 << pirq) & PMU_INT_TICK) {
@@ -2414,7 +2404,7 @@
spinlock_t lock;
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
int backlight_locker;
-#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
+#endif
};
static LIST_HEAD(all_pmu_pvt);
@@ -2464,7 +2454,7 @@
spin_lock_irqsave(&all_pvt_lock, flags);
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
pp->backlight_locker = 0;
-#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
+#endif
list_add(&pp->list, &all_pmu_pvt);
spin_unlock_irqrestore(&all_pvt_lock, flags);
file->private_data = pp;
@@ -2559,13 +2549,12 @@
spin_lock_irqsave(&all_pvt_lock, flags);
list_del(&pp->list);
spin_unlock_irqrestore(&all_pvt_lock, flags);
+
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
- if (pp->backlight_locker) {
- spin_lock_irqsave(&pmu_lock, flags);
- disable_kernel_backlight--;
- spin_unlock_irqrestore(&pmu_lock, flags);
- }
-#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
+ if (pp->backlight_locker)
+ pmac_backlight_enable();
+#endif
+
kfree(pp);
}
unlock_kernel();
@@ -2642,18 +2631,18 @@
#ifdef CONFIG_INPUT_ADBHID
case PMU_IOC_GRAB_BACKLIGHT: {
struct pmu_private *pp = filp->private_data;
- unsigned long flags;
if (pp->backlight_locker)
return 0;
+
pp->backlight_locker = 1;
- spin_lock_irqsave(&pmu_lock, flags);
- disable_kernel_backlight++;
- spin_unlock_irqrestore(&pmu_lock, flags);
+ pmac_backlight_disable();
+
return 0;
}
#endif /* CONFIG_INPUT_ADBHID */
#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
+
case PMU_IOC_GET_MODEL:
return put_user(pmu_kind, argp);
case PMU_IOC_HAS_ADB:
