[PATCH] drm/amd: Add missing kernel doc for prepare_suspend()

[Mario Limonciello]

prepare_suspend() is intended to be used for any IP blocks
that must allocate memory during the suspend sequence.

Reported-by: Stephen Rothwell <sfr at canb.auug.org.au>
Closes: https://lore.kernel.org/all/20231017143555.6a6450fc@canb.auug.org.au/
Fixes: cb11ca3233aa ("drm/amd: Add concept of running prepare_suspend() sequence for IP blocks")
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/amd/include/amd_shared.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 98e60bc868dd..579977f6ad52 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -271,6 +271,8 @@ enum amd_dpm_forced_level;
  * @hw_init: sets up the hw state
  * @hw_fini: tears down the hw state
  * @late_fini: final cleanup
+ * @prepare_suspend: handle IP specific changes to prepare for suspend
+ *                   (such as allocating any required memory)
  * @suspend: handles IP specific hw/sw changes for suspend
  * @resume: handles IP specific hw/sw changes for resume
  * @is_idle: returns current IP block idle status
-- 
2.34.1