video: tegra: host: update T186 VIC actmon driver

Modify T186/T210 VIC actmon driver and wmark_active governor
to address the following issues:

1. To let VIC actmon reports accurate VIC active
   cycle counts, set static WEIGHT_COUNT in both
   VIC actmon and VIC IP block. It ensures
   VIC actmon can capture all activity signal
   toggle event from VIC.

   The value of WEIGHT_COUNT are equal to:

   4 * (max VIC freq / VIC_actmon freq)
       = 4 * (1024 / 19.2)
      ~= 213

2. Since VIC actmon reports active "VIC clock
   cycle" instead of "VIC actmon clock cycle",
   "relative loading translation" should consider
   current VIC clock freq.

   E.g.,
     - sample_period = 80 us, VIC freq = 115.2 Mhz
     - 9216 cycles represents 100% loading
       (115.2 * 80)

3. Update upper/lower wmark settings after VIC
   clock scaled completed, to ensure wmark settings
   are equil to 0 ~ 100% loading of current freq.
   - Register 'get_dev_status' instance in
     devfreq_dev_profile, to let wmark active
     governor can query current device freq.
   - Register devfreq transition notifier in
     wmark_active governor. It will query current
     device freq. and update corresponding wmark
     value after VIC freq. changed.

Bug 200501949

Change-Id: Ic159eb93fddc37d55b0c9649a3afcb50ed82cac2
Signed-off-by: Aaron Tian <atian@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2200520
GVS: Gerrit_Virtual_Submit
Reviewed-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/nvhost.h b/include/linux/nvhost.h
index d6170f7dc..68b967888 100644
--- a/include/linux/nvhost.h
+++ b/include/linux/nvhost.h
@@ -108,6 +108,11 @@ struct nvhost_gating_register {
         u32 disable;
 };
 
+struct nvhost_actmon_register {
+        u32 addr;
+        u32 val;
+};
+
 struct nvhost_clock {
         char *name;
         unsigned long default_rate;
@@ -244,6 +249,9 @@ struct nvhost_device_data {
         bool                            linear_emc;
         /* Offset to actmon registers */
         u32                             actmon_regs;
+        /* WEIGHT_COUNT of actmon */
+        u32                             actmon_weight_count;
+        struct nvhost_actmon_register   *actmon_setting_regs;
         /* Devfreq governor name */
         const char                      *devfreq_governor;
         unsigned long freqs[NVHOST_MODULE_MAX_FREQS];