linux-kernel - [PATCH] drm/amd/display: remove unused average_render_time_in

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Message-Id: <20230331001032.1846456-1-trix@redhat.com>
Date:   Thu, 30 Mar 2023 20:10:32 -0400
From:   Tom Rix <trix@...hat.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        Rodrigo.Siqueira@....com, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, nathan@...nel.org, ndesaulniers@...gle.com,
        aric.cyr@....com, HaoPing.Liu@....com, Anthony.Koo@....com,
        hanghong.ma@....com, Angus.Wang@....com, Dillon.Varone@....com
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        Tom Rix <trix@...hat.com>
Subject: [PATCH] drm/amd/display: remove unused average_render_time_in_us and i variables

clang with W=1 reports
drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:1132:15: error: variable
  'average_render_time_in_us' set but not used [-Werror,-Wunused-but-set-variable]
        unsigned int average_render_time_in_us = 0;
                     ^
This variable is not used so remove it, which caused i to be unused so remove that as well.

Signed-off-by: Tom Rix <trix@...hat.com>
---
 .../drm/amd/display/modules/freesync/freesync.c    | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 315da61ee897..5c41a4751db4 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -1129,7 +1129,6 @@ void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
 {
 	struct core_freesync *core_freesync = NULL;
 	unsigned int last_render_time_in_us = 0;
-	unsigned int average_render_time_in_us = 0;
 
 	if (mod_freesync == NULL)
 		return;
@@ -1138,7 +1137,6 @@ void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
 
 	if (in_out_vrr->supported &&
 			in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
-		unsigned int i = 0;
 		unsigned int oldest_index = plane->time.index + 1;
 
 		if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
@@ -1147,18 +1145,6 @@ void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
 		last_render_time_in_us = curr_time_stamp_in_us -
 				plane->time.prev_update_time_in_us;
 
-		/* Sum off all entries except oldest one */
-		for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) {
-			average_render_time_in_us +=
-					plane->time.time_elapsed_in_us[i];
-		}
-		average_render_time_in_us -=
-				plane->time.time_elapsed_in_us[oldest_index];
-
-		/* Add render time for current flip */
-		average_render_time_in_us += last_render_time_in_us;
-		average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX;
-
 		if (in_out_vrr->btr.btr_enabled) {
 			apply_below_the_range(core_freesync,
 					stream,
-- 
2.27.0