drm/radeon/dpm/si: filter clocks based on voltage/clk dep tables

Filter out mclk and sclk levels higher than listed in the clk
voltage dependency tables.  Supporting these clocks will require
additional driver tweaking that isn't supported yet.

See bug:
https://bugs.freedesktop.org/show_bug.cgi?id=68235

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index cfe5d4d289159c832d71375e6eca8090adab7c3f..9ace28702c761a196089c7e88442e45b08a3ed16 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -2910,6 +2910,7 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
        bool disable_sclk_switching = false;
        u32 mclk, sclk;
        u16 vddc, vddci;
+       u32 max_sclk_vddc, max_mclk_vddci, max_mclk_vddc;
        int i;
 
        if ((rdev->pm.dpm.new_active_crtc_count > 1) ||
@@ -2943,6 +2944,29 @@ static void si_apply_state_adjust_rules(struct radeon_device *rdev,
                }
        }
 
+       /* limit clocks to max supported clocks based on voltage dependency tables */
+       btc_get_max_clock_from_voltage_dependency_table(&rdev->pm.dpm.dyn_state.vddc_dependency_on_sclk,
+                                                       &max_sclk_vddc);
+       btc_get_max_clock_from_voltage_dependency_table(&rdev->pm.dpm.dyn_state.vddci_dependency_on_mclk,
+                                                       &max_mclk_vddci);
+       btc_get_max_clock_from_voltage_dependency_table(&rdev->pm.dpm.dyn_state.vddc_dependency_on_mclk,
+                                                       &max_mclk_vddc);
+
+       for (i = 0; i < ps->performance_level_count; i++) {
+               if (max_sclk_vddc) {
+                       if (ps->performance_levels[i].sclk > max_sclk_vddc)
+                               ps->performance_levels[i].sclk = max_sclk_vddc;
+               }
+               if (max_mclk_vddci) {
+                       if (ps->performance_levels[i].mclk > max_mclk_vddci)
+                               ps->performance_levels[i].mclk = max_mclk_vddci;
+               }
+               if (max_mclk_vddc) {
+                       if (ps->performance_levels[i].mclk > max_mclk_vddc)
+                               ps->performance_levels[i].mclk = max_mclk_vddc;
+               }
+       }
+
        /* XXX validate the min clocks required for display */
 
        if (disable_mclk_switching) {