Revert "drm/radeon: drop btc_get_max_clock_from_voltage_dependency_table"

This reverts commit fc9dfeb1383287631ad5c5a676a2558b799db6e9.

There are still some stability problems on some SI boards so bring
this back.

diff --git a/drivers/gpu/drm/radeon/btc_dpm.c b/drivers/gpu/drm/radeon/btc_dpm.c
index 300d971..b718160 100644 (file)
--- a/drivers/gpu/drm/radeon/btc_dpm.c
+++ b/drivers/gpu/drm/radeon/btc_dpm.c
@@ -1170,6 +1170,23 @@ static const struct radeon_blacklist_clocks btc_blacklist_clocks[] =
         { 25000, 30000, RADEON_SCLK_UP }
 };
 
+void btc_get_max_clock_from_voltage_dependency_table(struct radeon_clock_voltage_dependency_table *table,
+                                                    u32 *max_clock)
+{
+       u32 i, clock = 0;
+
+       if ((table == NULL) || (table->count == 0)) {
+               *max_clock = clock;
+               return;
+       }
+
+       for (i = 0; i < table->count; i++) {
+               if (clock < table->entries[i].clk)
+                       clock = table->entries[i].clk;
+       }
+       *max_clock = clock;
+}
+
 void btc_apply_voltage_dependency_rules(struct radeon_clock_voltage_dependency_table *table,
                                        u32 clock, u16 max_voltage, u16 *voltage)
 {

diff --git a/drivers/gpu/drm/radeon/btc_dpm.h b/drivers/gpu/drm/radeon/btc_dpm.h
index 1a15e0e..3b6f12b 100644 (file)
--- a/drivers/gpu/drm/radeon/btc_dpm.h
+++ b/drivers/gpu/drm/radeon/btc_dpm.h
@@ -46,6 +46,8 @@ void btc_adjust_clock_combinations(struct radeon_device *rdev,
                                   struct rv7xx_pl *pl);
 void btc_apply_voltage_dependency_rules(struct radeon_clock_voltage_dependency_table *table,
                                        u32 clock, u16 max_voltage, u16 *voltage);
+void btc_get_max_clock_from_voltage_dependency_table(struct radeon_clock_voltage_dependency_table *table,
+                                                    u32 *max_clock);
 void btc_apply_voltage_delta_rules(struct radeon_device *rdev,
                                   u16 max_vddc, u16 max_vddci,
                                   u16 *vddc, u16 *vddci);