[PATCH 04/10] drm/amd/pp: Add a work queue for autowattman feature

[Rex Zhu]

driver need to monitor the gfx activity and notify
smu to change the dpm policy

Signed-off-by: Rex Zhu <rex....@amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 17 +++++++++++++++++
 drivers/gpu/drm/amd/powerplay/inc/hwmgr.h   |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
index 51c4ecb..cad71ec 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -252,6 +252,20 @@ int hwmgr_early_init(struct pp_instance *handle)
        return 0;
 }
 
+static void wattman_sample_handler(struct work_struct *work)
+{
+       struct pp_hwmgr *hwmgr =
+               container_of(work, struct pp_hwmgr, wattman_update_work.work);
+
+       if (hwmgr->autowattman_enabled) {
+               if (hwmgr->hwmgr_func->update_auto_wattman != NULL)
+                       hwmgr->hwmgr_func->update_auto_wattman(hwmgr);
+
+               if (hwmgr->hwmgr_func->start_auto_wattman != NULL)
+                       hwmgr->hwmgr_func->start_auto_wattman(hwmgr, true);
+       }
+}
+
 int hwmgr_hw_init(struct pp_instance *handle)
 {
        struct pp_hwmgr *hwmgr;
@@ -262,6 +276,8 @@ int hwmgr_hw_init(struct pp_instance *handle)
 
        hwmgr = handle->hwmgr;
 
+       INIT_DELAYED_WORK(&hwmgr->wattman_update_work, wattman_sample_handler);
+
        if (hwmgr->pptable_func == NULL ||
            hwmgr->pptable_func->pptable_init == NULL ||
            hwmgr->hwmgr_func->backend_init == NULL)
@@ -338,6 +354,7 @@ int hwmgr_hw_suspend(struct pp_instance *handle)
                return -EINVAL;
 
        hwmgr = handle->hwmgr;
+
        phm_disable_smc_firmware_ctf(hwmgr);
        ret = psm_set_boot_states(hwmgr);
        if (ret)
diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h 
b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
index d9aef88..0fb14a1 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
@@ -40,6 +40,7 @@
 struct pp_atomctrl_voltage_table;
 
 #define VOLTAGE_SCALE 4
+#define WATTMAM_SAMPLE_PERIOD msecs_to_jiffies(100)
 
 uint8_t convert_to_vid(uint16_t vddc);
 uint16_t convert_to_vddc(uint8_t vid);
@@ -758,6 +759,8 @@ struct pp_hwmgr {
        bool od_enabled;
        uint32_t power_limit;
        uint32_t default_power_limit;
+       bool autowattman_enabled;
+       struct delayed_work wattman_update_work;
 };
 
 struct cgs_irq_src_funcs {
-- 
1.9.1

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