drm/radeon/dpm: fetch the max clk from voltage dep tables helper

[karo-tx-linux.git] / drivers / gpu / drm / radeon / btc_dpm.c

diff --git a/drivers/gpu/drm/radeon/btc_dpm.c b/drivers/gpu/drm/radeon/btc_dpm.c
index 05ff315e8e9e03f4d2ba242b4680894cea8632cd..0d0f065a499cfd44447da8903666d62dedbbb6bb 100644 (file)
--- a/drivers/gpu/drm/radeon/btc_dpm.c
+++ b/drivers/gpu/drm/radeon/btc_dpm.c
@@ -1168,6 +1168,23 @@ 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)
 {