--- /dev/null
+From foo@baz Mon May 31 08:35:11 AM CEST 2021
+Date: Mon, 31 May 2021 08:35:11 +0200
+To: Greg KH <gregkh@linuxfoundation.org>
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Subject: i915: fix build warning in intel_dp_get_link_status()
+
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+There is a build warning using gcc-11 showing a mis-match in the .h and .c
+definitions of intel_dp_get_link_status():
+ CC [M] drivers/gpu/drm/i915/display/intel_dp.o
+drivers/gpu/drm/i915/display/intel_dp.c:4139:56: warning: argument 2 of type ‘u8[6]’ {aka ‘unsigned char[6]’} with mismatched bound [-Warray-parameter=]
+ 4139 | intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
+ | ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+In file included from drivers/gpu/drm/i915/display/intel_dp.c:51:
+drivers/gpu/drm/i915/display/intel_dp.h:105:57: note: previously declared as ‘u8 *’ {aka ‘unsigned char *’}
+ 105 | intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status);
+ | ~~~~^~~~~~~~~~~
+
+This was fixed accidentally commit b30edfd8d0b4 ("drm/i915: Switch to LTTPR
+non-transparent mode link training") by getting rid of the function entirely,
+but that is not a viable backport for a stable kernel, so just fix up the
+function definition to remove the build warning entirely. There is no
+functional change for this, and it fixes up one of the last 'make allmodconfig'
+build warnings when using gcc-11 on this kernel tree.
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/gpu/drm/i915/display/intel_dp.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/i915/display/intel_dp.c
++++ b/drivers/gpu/drm/i915/display/intel_dp.c
+@@ -4136,7 +4136,7 @@ static void chv_dp_post_pll_disable(stru
+ * link status information
+ */
+ bool
+-intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
++intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status)
+ {
+ return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
+ DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;