The same workaround as
ff999b8a0983ee15668394ed49e38d3568fc6859
"ARM: OMAP4460: Workaround for ROM bug because of CA9 r2pX GIC ..."
need to be applied not only when system is booting, but when MPUSS hits
OSWR state through CPUIdle too. Without this WA the same issue is
reproduced now on boards PandaES and Tablet/Blaze with SOM OMAP4460
when CONFIG_CPU_IDLE is enabled.
After MPUSS has enterred OSWR and waken up:
- GIC distributor became disabled forever
- scheduling is not performed any more
Cc: Kevin Hilman <khilman@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reported-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
extern void __init gic_init_irq(void);
extern void gic_dist_disable(void);
extern void __init gic_init_irq(void);
extern void gic_dist_disable(void);
+extern void gic_dist_enable(void);
extern bool gic_dist_disabled(void);
extern void gic_timer_retrigger(void);
extern void omap_smc1(u32 fn, u32 arg);
extern bool gic_dist_disabled(void);
extern void gic_timer_retrigger(void);
extern void omap_smc1(u32 fn, u32 arg);
int index)
{
struct idle_statedata *cx = state_ptr + index;
int index)
{
struct idle_statedata *cx = state_ptr + index;
+ u32 mpuss_can_lose_context = 0;
/*
* CPU0 has to wait and stay ON until CPU1 is OFF state.
/*
* CPU0 has to wait and stay ON until CPU1 is OFF state.
+ mpuss_can_lose_context = (cx->mpu_state == PWRDM_POWER_RET) &&
+ (cx->mpu_logic_state == PWRDM_POWER_OFF);
+
/*
* Call idle CPU PM enter notifier chain so that
* VFP and per CPU interrupt context is saved.
/*
* Call idle CPU PM enter notifier chain so that
* VFP and per CPU interrupt context is saved.
* Call idle CPU cluster PM enter notifier chain
* to save GIC and wakeupgen context.
*/
* Call idle CPU cluster PM enter notifier chain
* to save GIC and wakeupgen context.
*/
- if ((cx->mpu_state == PWRDM_POWER_RET) &&
- (cx->mpu_logic_state == PWRDM_POWER_OFF))
- cpu_cluster_pm_enter();
+ if (mpuss_can_lose_context)
+ cpu_cluster_pm_enter();
}
omap4_enter_lowpower(dev->cpu, cx->cpu_state);
}
omap4_enter_lowpower(dev->cpu, cx->cpu_state);
/* Wakeup CPU1 only if it is not offlined */
if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) {
/* Wakeup CPU1 only if it is not offlined */
if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) {
+
+ if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) &&
+ mpuss_can_lose_context)
+ gic_dist_disable();
+
clkdm_wakeup(cpu_clkdm[1]);
omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON);
clkdm_allow_idle(cpu_clkdm[1]);
clkdm_wakeup(cpu_clkdm[1]);
omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON);
clkdm_allow_idle(cpu_clkdm[1]);
+
+ if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) &&
+ mpuss_can_lose_context) {
+ while (gic_dist_disabled()) {
+ udelay(1);
+ cpu_relax();
+ }
+ gic_timer_retrigger();
+ }
* Call idle CPU cluster PM exit notifier chain
* to restore GIC and wakeupgen context.
*/
* Call idle CPU cluster PM exit notifier chain
* to restore GIC and wakeupgen context.
*/
- if (dev->cpu == 0 && (cx->mpu_state == PWRDM_POWER_RET) &&
- (cx->mpu_logic_state == PWRDM_POWER_OFF))
+ if (dev->cpu == 0 && mpuss_can_lose_context)
cpu_cluster_pm_exit();
fail:
cpu_cluster_pm_exit();
fail:
else
omap_pm_ops.finish_suspend(save_state);
else
omap_pm_ops.finish_suspend(save_state);
+ if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && cpu)
+ gic_dist_enable();
+
/*
* Restore the CPUx power state to ON otherwise CPUx
* power domain can transitions to programmed low power
/*
* Restore the CPUx power state to ON otherwise CPUx
* power domain can transitions to programmed low power
__raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
}
__raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
}
+void gic_dist_enable(void)
+{
+ if (gic_dist_base_addr)
+ __raw_writel(0x1, gic_dist_base_addr + GIC_DIST_CTRL);
+}
+
bool gic_dist_disabled(void)
{
return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);
bool gic_dist_disabled(void)
{
return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);