drm/radeon/kms: add dpm support for btc (v3)

This adds dpm support for btc asics.  This includes:
- clockgating
- dynamic engine clock scaling
- dynamic memory clock scaling
- dynamic voltage scaling
- dynamic pcie gen1/gen2 switching (requires additional acpi support)

Set radeon.dpm=1 to enable.

v2: reduce stack usage
v3: attempt to fix state enable

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

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 4ca134bef689..f9c3f1c1f3e2 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1722,6 +1722,18 @@ static struct radeon_asic btc_asic = {
                 .set_uvd_clocks = &evergreen_set_uvd_clocks,
                 .get_temperature = &evergreen_get_temp,
         },
+        .dpm = {
+                .init = &btc_dpm_init,
+                .setup_asic = &btc_dpm_setup_asic,
+                .enable = &btc_dpm_enable,
+                .disable = &btc_dpm_disable,
+                .set_power_state = &btc_dpm_set_power_state,
+                .display_configuration_changed = &cypress_dpm_display_configuration_changed,
+                .fini = &btc_dpm_fini,
+                .get_sclk = &rv770_dpm_get_sclk,
+                .get_mclk = &rv770_dpm_get_mclk,
+                .print_power_state = &rv770_dpm_print_power_state,
+        },
         .pflip = {
                 .pre_page_flip = &evergreen_pre_page_flip,
                 .page_flip = &evergreen_page_flip,