drm/radeon/dpm: disable cac setup on SI

Disable cac setup on SI for now since it causes
strange performance level restrictions on certain
cards.  I suspect there may be issues with some of
the 64 bit fixed point double emulation that is used
to set up those parameters.  I need to double check
the math before this can be re-enabled.

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 994f9e5b6beed81a2d8d1f2bb4a6d67dadce6dc4..e8ee6858ce275194935b586e4ece2455359cc491 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -1929,6 +1929,7 @@ static void si_initialize_powertune_defaults(struct radeon_device *rdev)
                        si_pi->cac_override = cac_override_pitcairn;
                        si_pi->powertune_data = &powertune_data_pitcairn;
                        si_pi->dte_data = dte_data_pitcairn;
+                       break;
                }
        } else if (rdev->family == CHIP_VERDE) {
                si_pi->lcac_config = lcac_cape_verde;
@@ -2041,7 +2042,8 @@ static void si_initialize_powertune_defaults(struct radeon_device *rdev)
        ni_pi->enable_sq_ramping = false;
        si_pi->enable_dte = false;
 
-       if (si_pi->powertune_data->enable_powertune_by_default) {
+       /* XXX: fix me */
+       if (0/*si_pi->powertune_data->enable_powertune_by_default*/) {
                ni_pi->enable_power_containment= true;
                ni_pi->enable_cac = true;
                if (si_pi->dte_data.enable_dte_by_default) {