Merge branch 'for_3.6/pm/performance' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into devel-pm

5 files changed, 57 insertions, 59 deletions

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 207bc1c7759f..e6ae3fe5cdc6 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -77,20 +77,6 @@ static struct omap3_idle_statedata omap3_idle_data[] = {
 
 static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
 
-static int _cpuidle_allow_idle(struct powerdomain *pwrdm,
-                                struct clockdomain *clkdm)
-{
-        clkdm_allow_idle(clkdm);
-        return 0;
-}
-
-static int _cpuidle_deny_idle(struct powerdomain *pwrdm,
-                                struct clockdomain *clkdm)
-{
-        clkdm_deny_idle(clkdm);
-        return 0;
-}
-
 static int __omap3_enter_idle(struct cpuidle_device *dev,
                                 struct cpuidle_driver *drv,
                                 int index)
@@ -108,8 +94,8 @@ static int __omap3_enter_idle(struct cpuidle_device *dev,
 
         /* Deny idle for C1 */
         if (index == 0) {
-                pwrdm_for_each_clkdm(mpu_pd, _cpuidle_deny_idle);
-                pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle);
+                clkdm_deny_idle(mpu_pd->pwrdm_clkdms[0]);
+                clkdm_deny_idle(core_pd->pwrdm_clkdms[0]);
         }
 
         /*
@@ -131,8 +117,8 @@ static int __omap3_enter_idle(struct cpuidle_device *dev,
 
         /* Re-allow idle for C1 */
         if (index == 0) {
-                pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle);
-                pwrdm_for_each_clkdm(core_pd, _cpuidle_allow_idle);
+                clkdm_allow_idle(mpu_pd->pwrdm_clkdms[0]);
+                clkdm_allow_idle(core_pd->pwrdm_clkdms[0]);
         }
 
 return_sleep_time:
@@ -178,7 +164,7 @@ static int next_valid_state(struct cpuidle_device *dev,
         u32 mpu_deepest_state = PWRDM_POWER_RET;
         u32 core_deepest_state = PWRDM_POWER_RET;
         int idx;
-        int next_index = -1;
+        int next_index = 0; /* C1 is the default value */
 
         if (enable_off_mode) {
                 mpu_deepest_state = PWRDM_POWER_OFF;
@@ -209,12 +195,6 @@ static int next_valid_state(struct cpuidle_device *dev,
                 }
         }
 
-        /*
-         * C1 is always valid.
-         * So, no need to check for 'next_index == -1' outside
-         * this loop.
-         */
-
         return next_index;
 }
 
@@ -228,23 +208,22 @@ static int next_valid_state(struct cpuidle_device *dev,
  * the device to the specified or a safer state.
  */
 static int omap3_enter_idle_bm(struct cpuidle_device *dev,
-                                struct cpuidle_driver *drv,
+                               struct cpuidle_driver *drv,
                                int index)
 {
         int new_state_idx;
-        u32 core_next_state, per_next_state = 0, per_saved_state = 0, cam_state;
+        u32 core_next_state, per_next_state = 0, per_saved_state = 0;
         struct omap3_idle_statedata *cx;
         int ret;
 
         /*
-         * Prevent idle completely if CAM is active.
+         * Use only C1 if CAM is active.
          * CAM does not have wakeup capability in OMAP3.
          */
-        cam_state = pwrdm_read_pwrst(cam_pd);
-        if (cam_state == PWRDM_POWER_ON) {
+        if (pwrdm_read_pwrst(cam_pd) == PWRDM_POWER_ON)
                 new_state_idx = drv->safe_state_index;
-                goto select_state;
-        }
+        else
+                new_state_idx = next_valid_state(dev, drv, index);
 
         /*
          * FIXME: we currently manage device-specific idle states
@@ -254,24 +233,28 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
          *        its own code.
          */
 
-        /*
-         * Prevent PER off if CORE is not in retention or off as this
-         * would disable PER wakeups completely.
-         */
-        cx = &omap3_idle_data[index];
+        /* Program PER state */
+        cx = &omap3_idle_data[new_state_idx];
         core_next_state = cx->core_state;
         per_next_state = per_saved_state = pwrdm_read_next_pwrst(per_pd);
-        if ((per_next_state == PWRDM_POWER_OFF) &&
-            (core_next_state > PWRDM_POWER_RET))
-                per_next_state = PWRDM_POWER_RET;
+        if (new_state_idx == 0) {
+                /* In C1 do not allow PER state lower than CORE state */
+                if (per_next_state < core_next_state)
+                        per_next_state = core_next_state;
+        } else {
+                /*
+                 * Prevent PER OFF if CORE is not in RETention or OFF as this
+                 * would disable PER wakeups completely.
+                 */
+                if ((per_next_state == PWRDM_POWER_OFF) &&
+                    (core_next_state > PWRDM_POWER_RET))
+                        per_next_state = PWRDM_POWER_RET;
+        }
 
         /* Are we changing PER target state? */
         if (per_next_state != per_saved_state)
                 pwrdm_set_next_pwrst(per_pd, per_next_state);
 
-        new_state_idx = next_valid_state(dev, drv, index);
-
-select_state:
         ret = omap3_enter_idle(dev, drv, new_state_idx);
 
         /* Restore original PER state if it was modified */
@@ -288,7 +271,7 @@ struct cpuidle_driver omap3_idle_driver = {
         .owner =        THIS_MODULE,
         .states = {
                 {
-                        .enter            = omap3_enter_idle,
+                        .enter            = omap3_enter_idle_bm,
                         .exit_latency     = 2 + 2,
                         .target_residency = 5,
                         .flags            = CPUIDLE_FLAG_TIME_VALID,
diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
index 13670aa84e58..e35a86bf4e1d 100644
--- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c
+++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
@@ -255,7 +255,7 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
                 return -ENXIO;
         }
 
-        pwrdm_pre_transition();
+        pwrdm_pre_transition(NULL);
 
         /*
          * Check MPUSS next state and save interrupt controller if needed.
@@ -287,7 +287,7 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
         wakeup_cpu = smp_processor_id();
         set_cpu_next_pwrst(wakeup_cpu, PWRDM_POWER_ON);
 
-        pwrdm_post_transition();
+        pwrdm_post_transition(NULL);
 
         return 0;
 }
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index e67d898433fb..e63fdd02c6f5 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -70,7 +70,6 @@ void (*omap3_do_wfi_sram)(void);
 
 static struct powerdomain *mpu_pwrdm, *neon_pwrdm;
 static struct powerdomain *core_pwrdm, *per_pwrdm;
-static struct powerdomain *cam_pwrdm;
 
 static void omap3_core_save_context(void)
 {
@@ -273,16 +272,21 @@ void omap_sram_idle(void)
         per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
         core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
 
-        pwrdm_pre_transition();
+        if (mpu_next_state < PWRDM_POWER_ON) {
+                pwrdm_pre_transition(mpu_pwrdm);
+                pwrdm_pre_transition(neon_pwrdm);
+        }
 
         /* PER */
         if (per_next_state < PWRDM_POWER_ON) {
+                pwrdm_pre_transition(per_pwrdm);
                 per_going_off = (per_next_state == PWRDM_POWER_OFF) ? 1 : 0;
                 omap2_gpio_prepare_for_idle(per_going_off);
         }
 
         /* CORE */
         if (core_next_state < PWRDM_POWER_ON) {
+                pwrdm_pre_transition(core_pwrdm);
                 if (core_next_state == PWRDM_POWER_OFF) {
                         omap3_core_save_context();
                         omap3_cm_save_context();
@@ -335,16 +339,20 @@ void omap_sram_idle(void)
                         omap2_prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF_MASK,
                                                OMAP3430_GR_MOD,
                                                OMAP3_PRM_VOLTCTRL_OFFSET);
+                pwrdm_post_transition(core_pwrdm);
         }
         omap3_intc_resume_idle();
 
-        pwrdm_post_transition();
-
         /* PER */
-        if (per_next_state < PWRDM_POWER_ON)
+        if (per_next_state < PWRDM_POWER_ON) {
                 omap2_gpio_resume_after_idle();
+                pwrdm_post_transition(per_pwrdm);
+        }
 
-        clkdm_allow_idle(mpu_pwrdm->pwrdm_clkdms[0]);
+        if (mpu_next_state < PWRDM_POWER_ON) {
+                pwrdm_post_transition(mpu_pwrdm);
+                pwrdm_post_transition(neon_pwrdm);
+        }
 }
 
 static void omap3_pm_idle(void)
@@ -705,7 +713,6 @@ int __init omap3_pm_init(void)
         neon_pwrdm = pwrdm_lookup("neon_pwrdm");
         per_pwrdm = pwrdm_lookup("per_pwrdm");
         core_pwrdm = pwrdm_lookup("core_pwrdm");
-        cam_pwrdm = pwrdm_lookup("cam_pwrdm");
 
         neon_clkdm = clkdm_lookup("neon_clkdm");
         mpu_clkdm = clkdm_lookup("mpu_clkdm");
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 96114901b932..eefe179045e6 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -981,15 +981,23 @@ int pwrdm_state_switch(struct powerdomain *pwrdm)
         return ret;
 }
 
-int pwrdm_pre_transition(void)
+int pwrdm_pre_transition(struct powerdomain *pwrdm)
 {
-        pwrdm_for_each(_pwrdm_pre_transition_cb, NULL);
+        if (pwrdm)
+                _pwrdm_pre_transition_cb(pwrdm, NULL);
+        else
+                pwrdm_for_each(_pwrdm_pre_transition_cb, NULL);
+
         return 0;
 }
 
-int pwrdm_post_transition(void)
+int pwrdm_post_transition(struct powerdomain *pwrdm)
 {
-        pwrdm_for_each(_pwrdm_post_transition_cb, NULL);
+        if (pwrdm)
+                _pwrdm_post_transition_cb(pwrdm, NULL);
+        else
+                pwrdm_for_each(_pwrdm_post_transition_cb, NULL);
+
         return 0;
 }
 
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index 8f88d65c46ea..a6a4604801ad 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -213,8 +213,8 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
 int pwrdm_wait_transition(struct powerdomain *pwrdm);
 
 int pwrdm_state_switch(struct powerdomain *pwrdm);
-int pwrdm_pre_transition(void);
-int pwrdm_post_transition(void);
+int pwrdm_pre_transition(struct powerdomain *pwrdm);
+int pwrdm_post_transition(struct powerdomain *pwrdm);
 int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm);
 int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
 bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);