From: Eric Huang <JinHuiEric.Huang@xxxxxxx>
This implements sclk overdrive(OD) overclocking support for Tonga,
and the maximum overdrive percentage is 20.
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Eric Huang <JinHuiEric.Huang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c | 44 +++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
index cb28335..cf1fca4 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
@@ -6194,6 +6194,48 @@ static int tonga_print_clock_levels(struct pp_hwmgr *hwmgr,
return size;
}
+static int tonga_get_sclk_od(struct pp_hwmgr *hwmgr)
+{
+ struct tonga_hwmgr *data = (struct tonga_hwmgr *)(hwmgr->backend);
+ struct tonga_single_dpm_table *sclk_table = &(data->dpm_table.sclk_table);
+ struct tonga_single_dpm_table *golden_sclk_table =
+ &(data->golden_dpm_table.sclk_table);
+ int value;
+
+ value = (sclk_table->dpm_levels[sclk_table->count - 1].value -
+ golden_sclk_table->dpm_levels[golden_sclk_table->count - 1].value) *
+ 100 /
+ golden_sclk_table->dpm_levels[golden_sclk_table->count - 1].value;
+
+ return value;
+}
+
+static int tonga_set_sclk_od(struct pp_hwmgr *hwmgr, uint32_t value)
+{
+ struct tonga_hwmgr *data = (struct tonga_hwmgr *)(hwmgr->backend);
+ struct tonga_single_dpm_table *golden_sclk_table =
+ &(data->golden_dpm_table.sclk_table);
+ struct pp_power_state *ps;
+ struct tonga_power_state *tonga_ps;
+
+ if (value > 20)
+ value = 20;
+
+ ps = hwmgr->request_ps;
+
+ if (ps == NULL)
+ return -EINVAL;
+
+ tonga_ps = cast_phw_tonga_power_state(&ps->hardware);
+
+ tonga_ps->performance_levels[tonga_ps->performance_level_count - 1].engine_clock =
+ golden_sclk_table->dpm_levels[golden_sclk_table->count - 1].value *
+ value / 100 +
+ golden_sclk_table->dpm_levels[golden_sclk_table->count - 1].value;
+
+ return 0;
+}
+
static const struct pp_hwmgr_func tonga_hwmgr_funcs = {
.backend_init = &tonga_hwmgr_backend_init,
.backend_fini = &tonga_hwmgr_backend_fini,
@@ -6236,6 +6278,8 @@ static const struct pp_hwmgr_func tonga_hwmgr_funcs = {
.set_pp_table = tonga_set_pp_table,
.force_clock_level = tonga_force_clock_level,
.print_clock_levels = tonga_print_clock_levels,
+ .get_sclk_od = tonga_get_sclk_od,
+ .set_sclk_od = tonga_set_sclk_od,
};
int tonga_hwmgr_init(struct pp_hwmgr *hwmgr)
--
2.5.5
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