[PATCH v2] drm/xe/guc: Fix GuC log/ct output via debugfs

[Julia Filipchuk <julia.filipchuk@intel.com>]

Change to disable asci85 GuC logging only when output to devcoredump (was temporarily
disabled for all code paths).

v2: Ignore only for devcoredump case (not dmsg output). (feedback by Lucas)

Signed-off-by: Julia Filipchuk <julia.filipchuk@intel.com>
---
 drivers/gpu/drm/xe/xe_devcoredump.c | 8 +++++---
 include/drm/drm_print.h             | 2 ++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c
index 6980304c8903..8e5d1f9866a7 100644
--- a/drivers/gpu/drm/xe/xe_devcoredump.c
+++ b/drivers/gpu/drm/xe/xe_devcoredump.c
@@ -424,10 +424,12 @@ void xe_print_blob_ascii85(struct drm_printer *p, const char *prefix,
 	 * Splitting blobs across multiple lines is not compatible with the mesa
 	 * debug decoder tool. Note that even dropping the explicit '\n' below
 	 * doesn't help because the GuC log is so big some underlying implementation
-	 * still splits the lines at 512K characters. So just bail completely for
-	 * the moment.
+	 * still splits the lines at 512K characters.
+	 *
+	 * Only disable from devcoredump output.
 	 */
-	return;
+	if (p->coredump)
+		return;
 
 #define DMESG_MAX_LINE_LEN	800
 #define MIN_SPACE		(ASCII85_BUFSZ + 2)		/* 85 + "\n\0" */
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index f77fe1531cf8..f5ea7f38ba09 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -182,6 +182,7 @@ struct drm_printer {
 		unsigned int counter;
 	} line;
 	enum drm_debug_category category;
+	bool coredump;
 };
 
 void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf);
@@ -335,6 +336,7 @@ drm_coredump_printer(struct drm_print_iterator *iter)
 		.printfn = __drm_printfn_coredump,
 		.puts = __drm_puts_coredump,
 		.arg = iter,
+		.coredump = true,
 	};
 
 	/* Set the internal offset of the iterator to zero */
-- 
2.47.1