drm/radeon/dpm: require rlc for dpm

The rlc is required for dpm to work properly, so if
the rlc ucode is missing, don't enable dpm.  Enabling
dpm without the rlc enabled can result in hangs.

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

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index f374c467aacaf57c9a46c7c655250ef91a44516c..6a7a80b8a00ace8257d5691a6e946e464974ad4f 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -1176,7 +1176,10 @@ int radeon_pm_init(struct radeon_device *rdev)
        case CHIP_VERDE:
        case CHIP_OLAND:
        case CHIP_HAINAN:
-               if (radeon_dpm == 1)
+               /* DPM requires the RLC */
+               if (!rdev->rlc_fw)
+                       rdev->pm.pm_method = PM_METHOD_PROFILE;
+               else if (radeon_dpm == 1)
                        rdev->pm.pm_method = PM_METHOD_DPM;
                else
                        rdev->pm.pm_method = PM_METHOD_PROFILE;