drm/i915/lobf: Add debug print for LOBF

Lobf is enabled part of ALPM configuration and if has_lobf
is set to true respective bit for LOBF will be set. Add debug
print while setting the bitfield of LOBF.

Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://lore.kernel.org/r/20250423092334.2294483-4-animesh.manna@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index 41f8b05cc11ce40860a4782ae967835cacd5b4ad..9227bb0b0c5592334f2b40308aed36f5389bdaf4 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -5,6 +5,8 @@
 
 #include <linux/debugfs.h>
 
+#include <drm/drm_print.h>
+
 #include "intel_alpm.h"
 #include "intel_crtc.h"
 #include "intel_de.h"
@@ -353,8 +355,10 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp,
                        ALPM_CTL_EXTENDED_FAST_WAKE_TIME(intel_dp->alpm_parameters.fast_wake_lines);
        }
 
-       if (crtc_state->has_lobf)
+       if (crtc_state->has_lobf) {
                alpm_ctl |= ALPM_CTL_LOBF_ENABLE;
+               drm_dbg_kms(display->drm, "Link off between frames (LOBF) enabled\n");
+       }
 
        alpm_ctl |= ALPM_CTL_ALPM_ENTRY_CHECK(intel_dp->alpm_parameters.check_entry_lines);