drm/amd/display: Fix PSR-SU not support but still call the amdgpu_dm_psr_enable

commit b0a3e84 upstream.

[Why]
The enum DC_PSR_VERSION_SU_1 of psr_version is 1 and
DC_PSR_VERSION_UNSUPPORTED is 0xFFFFFFFF.

The original code may has chance trigger the amdgpu_dm_psr_enable()
while psr version is set to DC_PSR_VERSION_UNSUPPORTED.

[How]
Modify the condition to psr->psr_version == DC_PSR_VERSION_SU_1

Reviewed-by: Sun peng Li <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
Signed-off-by: Roman Li <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit f765e7c)
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Tom Chung

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -8922,7 +8922,7 @@ static void amdgpu_dm_enable_self_refresh(struct amdgpu_crtc *acrtc_attach,
 		    (current_ts - psr->psr_dirty_rects_change_timestamp_ns) > 500000000) {
 			if (pr->replay_feature_enabled && !pr->replay_allow_active)
 				amdgpu_dm_replay_enable(acrtc_state->stream, true);
-			if (psr->psr_version >= DC_PSR_VERSION_SU_1 &&
+			if (psr->psr_version == DC_PSR_VERSION_SU_1 &&
 			    !psr->psr_allow_active && !aconn->disallow_edp_enter_psr)
 				amdgpu_dm_psr_enable(acrtc_state->stream);
 		}