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

[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 <sunpeng.li@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f765e7ce0417f8dc38479b4b495047c397c16902)
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index dcc5d8ded662a90162594eae96b04c5842b9b9c2..a5fd19ee89dca95b6918d228789077a1793b1a1d 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8929,7 +8929,7 @@ 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);
                }