linux-kernel - [PATCH 10/31] video: fbdev: riva: riva_hw: Remove a bunch of unused variables

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Message-Id: <20210113145009.1272040-11-lee.jones@linaro.org>
Date:   Wed, 13 Jan 2021 14:49:48 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, Antonino Daplas <adaplas@...il.com>,
        Jeff Garzik <jgarzik@...ox.com>, linux-fbdev@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 10/31] video: fbdev: riva: riva_hw: Remove a bunch of unused variables

Fixes the following W=1 kernel build warning(s):

 drivers/video/fbdev/riva/riva_hw.c: In function ‘nv10CalcArbitration’:
 drivers/video/fbdev/riva/riva_hw.c:849:9: warning: variable ‘pclks_2_top_fifo’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:848:43: warning: variable ‘vus_pipe’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:848:21: warning: variable ‘us_pipe’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:848:9: warning: variable ‘craw’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:846:27: warning: variable ‘vlwm’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:844:37: warning: variable ‘video_drain_rate’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:841:21: warning: variable ‘us_extra’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:840:55: warning: variable ‘vbs’ set but not used [-Wunused-but-set-variable]
 drivers/video/fbdev/riva/riva_hw.c:839:25: warning: variable ‘cas’ set but not used [-Wunused-but-set-variable]

Cc: Antonino Daplas <adaplas@...il.com>
Cc: Jeff Garzik <jgarzik@...ox.com>
Cc: linux-fbdev@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/video/fbdev/riva/riva_hw.c | 26 ++++++++------------------
 1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/video/fbdev/riva/riva_hw.c b/drivers/video/fbdev/riva/riva_hw.c
index bcf9c4b4de311..4ee63f7d84d3e 100644
--- a/drivers/video/fbdev/riva/riva_hw.c
+++ b/drivers/video/fbdev/riva/riva_hw.c
@@ -836,17 +836,17 @@ static void nv10CalcArbitration
     nv10_sim_state *arb
 )
 {
-    int data, pagemiss, cas,width, video_enable, bpp;
-    int nvclks, mclks, pclks, vpagemiss, crtpagemiss, vbs;
-    int nvclk_fill, us_extra;
+    int data, pagemiss, width, video_enable, bpp;
+    int nvclks, mclks, pclks, vpagemiss, crtpagemiss;
+    int nvclk_fill;
     int found, mclk_extra, mclk_loop, cbs, m1;
     int mclk_freq, pclk_freq, nvclk_freq, mp_enable;
-    int us_m, us_m_min, us_n, us_p, video_drain_rate, crtc_drain_rate;
+    int us_m, us_m_min, us_n, us_p, crtc_drain_rate;
     int vus_m, vus_n, vus_p;
-    int vpm_us, us_video, vlwm, cpm_us, us_crt,clwm;
+    int vpm_us, us_video, cpm_us, us_crt,clwm;
     int clwm_rnd_down;
-    int craw, m2us, us_pipe, us_pipe_min, vus_pipe, p1clk, p2;
-    int pclks_2_top_fifo, min_mclk_extra;
+    int m2us, us_pipe_min, p1clk, p2;
+    int min_mclk_extra;
     int us_min_mclk_extra;
 
     fifo->valid = 1;
@@ -854,16 +854,13 @@ static void nv10CalcArbitration
     mclk_freq = arb->mclk_khz;
     nvclk_freq = arb->nvclk_khz;
     pagemiss = arb->mem_page_miss;
-    cas = arb->mem_latency;
     width = arb->memory_width/64;
     video_enable = arb->enable_video;
     bpp = arb->pix_bpp;
     mp_enable = arb->enable_mp;
     clwm = 0;
-    vlwm = 1024;
 
     cbs = 512;
-    vbs = 512;
 
     pclks = 4; /* lwm detect. */
 
@@ -924,17 +921,13 @@ static void nv10CalcArbitration
       us_min_mclk_extra = min_mclk_extra *1000*1000 / mclk_freq;
       us_n = nvclks*1000*1000 / nvclk_freq;/* nvclk latency in us */
       us_p = pclks*1000*1000 / pclk_freq;/* nvclk latency in us */
-      us_pipe = us_m + us_n + us_p;
       us_pipe_min = us_m_min + us_n + us_p;
-      us_extra = 0;
 
       vus_m = mclk_loop *1000*1000 / mclk_freq; /* Mclk latency in us */
       vus_n = (4)*1000*1000 / nvclk_freq;/* nvclk latency in us */
       vus_p = 0*1000*1000 / pclk_freq;/* pclk latency in us */
-      vus_pipe = vus_m + vus_n + vus_p;
 
       if(video_enable) {
-        video_drain_rate = pclk_freq * 4; /* MB/s */
         crtc_drain_rate = pclk_freq * bpp/8; /* MB/s */
 
         vpagemiss = 1; /* self generating page miss */
@@ -993,7 +986,6 @@ static void nv10CalcArbitration
               else if(crtc_drain_rate * 100  >= nvclk_fill * 98) {
                   clwm = 1024;
                   cbs = 512;
-                  us_extra = (cbs * 1000 * 1000)/ (8*width)/mclk_freq ;
               }
           }
       }
@@ -1010,7 +1002,6 @@ static void nv10CalcArbitration
 
       m1 = clwm + cbs -  1024; /* Amount of overfill */
       m2us = us_pipe_min + us_min_mclk_extra;
-      pclks_2_top_fifo = (1024-clwm)/(8*width);
 
       /* pclk cycles to drain */
       p1clk = m2us * pclk_freq/(1000*1000); 
@@ -1038,14 +1029,13 @@ static void nv10CalcArbitration
               min_mclk_extra--;
         }
       }
-      craw = clwm;
 
       if(clwm < (1024-cbs+8)) clwm = 1024-cbs+8;
       data = (int)(clwm);
       /*  printf("CRT LWM: %f bytes, prog: 0x%x, bs: 256\n", clwm, data ); */
       fifo->graphics_lwm = data;   fifo->graphics_burst_size = cbs;
 
-      /*  printf("VID LWM: %f bytes, prog: 0x%x, bs: %d\n, ", vlwm, data, vbs ); */
+      /*  printf("VID LWM: 1024 bytes, prog: 0x%x, bs: 512\n, ", data); */
       fifo->video_lwm = 1024;  fifo->video_burst_size = 512;
     }
 }
-- 
2.25.1