drm/radeon/kms/pm: add asic specific callbacks for getting power state (v2)

This also simplifies the code and enables reclocking with multiple heads
active by tracking whether the power states are single or multi-head
capable.

Eventually, we will want to select a power state based on external
factors (AC/DC state, user selection, etc.).

(v2) Update for evergreen

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 44198581ba9e..6a9ec8511261 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -2368,7 +2368,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
         u8 rev, blocks, tmp;
         int state_index = 0;
 
-        rdev->pm.default_power_state = NULL;
+        rdev->pm.default_power_state_index = -1;
 
         if (rdev->flags & RADEON_IS_MOBILITY) {
                 offset = combios_get_table_offset(dev, COMBIOS_POWERPLAY_INFO_TABLE);
@@ -2441,6 +2441,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
                         if (rev > 6)
                                 rdev->pm.power_state[state_index].non_clock_info.pcie_lanes =
                                         RBIOS8(offset + 0x5 + 0x10);
+                        rdev->pm.power_state[state_index].flags = RADEON_PM_SINGLE_DISPLAY_ONLY;
                         state_index++;
                 } else {
                         /* XXX figure out some good default low power mode for mobility cards w/out power tables */
@@ -2462,12 +2463,12 @@ default_mode:
                 rdev->pm.power_state[state_index].non_clock_info.pcie_lanes = radeon_get_pcie_lanes(rdev);
         else
                 rdev->pm.power_state[state_index].non_clock_info.pcie_lanes = 16;
-        rdev->pm.default_power_state = &rdev->pm.power_state[state_index];
+        rdev->pm.power_state[state_index].flags = 0;
+        rdev->pm.default_power_state_index = state_index;
         rdev->pm.num_power_states = state_index + 1;
 
-        rdev->pm.current_power_state = rdev->pm.default_power_state;
-        rdev->pm.current_clock_mode =
-                rdev->pm.default_power_state->default_clock_mode;
+        rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
+        rdev->pm.current_clock_mode_index = 0;
 }
 
 void radeon_external_tmds_setup(struct drm_encoder *encoder)