[PATCH 06/12] drm/i915/psr: Add some documentation of variables used in psr code

["Jouni Högander" <jouni.hogander@intel.com>]

We are adding more boolean variable into intel_psr and intel_crtc_state
structs. Add some documentation about these for sake of clarity.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 29fe46ae016f..f66fdda7418a 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -171,6 +171,22 @@
  *
  * The rest of the bits are more self-explanatory and/or
  * irrelevant for normal operation.
+ *
+ * Description of intel_crtc_state variables. has_psr, has_panel_replay and
+ * has_sel_update:
+ *
+ *  has_psr (alone):			PSR1
+ *  has_psr + has_sel_update:		PSR2
+ *  has_panel_replay:			Panel Replay
+ *  has_panel_replay + has_sel_update:	Panel Replay Selective Update
+ *
+ * Description of some intel_psr enabled, panel_replay_enabled,
+ * sel_update_enabled
+ *
+ *  enabled (alone):						PSR1
+ *  enabled + sel_update_enabled:				PSR2
+ *  enabled + panel_replay_enabled:				Panel Replay
+ *  enabled + panel_replay_enabled + sel_update_enabled:	Panel Replay SU
  */
 
 bool intel_encoder_can_psr(struct intel_encoder *encoder)
-- 
2.34.1