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neofb: drop redundant code 

Drop structure which is only set but never read.  Drop variables which are
only set and never read.  Convert one long switch into two shorter ones.

Add cpu_relax() in busy waiting loop.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Helt 2008-07-23 21:31:45 -07:00 committed by Linus Torvalds
parent 7fc80b7bd6
commit 1ca6b62f8c
1 changed files with 22 additions and 73 deletions
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95
drivers/video/neofb.c
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@ -479,7 +479,8 @@ static inline int neo2200_sync(struct fb_info *info)
{
struct neofb_par *par = info->par;
while (readl(&par->neo2200->bltStat) & 1);
while (readl(&par->neo2200->bltStat) & 1)
cpu_relax();
return 0;
}
@ -587,34 +588,14 @@ static int
neofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct neofb_par *par = info->par;
unsigned int pixclock = var->pixclock;
struct xtimings timings;
int memlen, vramlen;
int mode_ok = 0;
DBG("neofb_check_var");
if (!pixclock)
pixclock = 10000; /* 10ns = 100MHz */
timings.pixclock = 1000000000 / pixclock;
if (timings.pixclock < 1)
timings.pixclock = 1;
if (timings.pixclock > par->maxClock)
if (PICOS2KHZ(var->pixclock) > par->maxClock)
return -EINVAL;
timings.dblscan = var->vmode & FB_VMODE_DOUBLE;
timings.interlaced = var->vmode & FB_VMODE_INTERLACED;
timings.HDisplay = var->xres;
timings.HSyncStart = timings.HDisplay + var->right_margin;
timings.HSyncEnd = timings.HSyncStart + var->hsync_len;
timings.HTotal = timings.HSyncEnd + var->left_margin;
timings.VDisplay = var->yres;
timings.VSyncStart = timings.VDisplay + var->lower_margin;
timings.VSyncEnd = timings.VSyncStart + var->vsync_len;
timings.VTotal = timings.VSyncEnd + var->upper_margin;
timings.sync = var->sync;
/* Is the mode larger than the LCD panel? */
if (par->internal_display &&
((var->xres > par->NeoPanelWidth) ||
@ -1923,9 +1904,6 @@ static int __devinit neo_init_hw(struct fb_info *info)
int maxClock = 65000;
int CursorMem = 1024;
int CursorOff = 0x100;
int linearSize = 1024;
int maxWidth = 1024;
int maxHeight = 1024;
DBG("neo_init_hw");
@ -1944,81 +1922,52 @@ static int __devinit neo_init_hw(struct fb_info *info)
case FB_ACCEL_NEOMAGIC_NM2070:
videoRam = 896;
maxClock = 65000;
CursorMem = 2048;
CursorOff = 0x100;
linearSize = 1024;
maxWidth = 1024;
maxHeight = 1024;
break;
case FB_ACCEL_NEOMAGIC_NM2090:
case FB_ACCEL_NEOMAGIC_NM2093:
videoRam = 1152;
maxClock = 80000;
CursorMem = 2048;
CursorOff = 0x100;
linearSize = 2048;
maxWidth = 1024;
maxHeight = 1024;
break;
case FB_ACCEL_NEOMAGIC_NM2097:
videoRam = 1152;
maxClock = 80000;
CursorMem = 1024;
CursorOff = 0x100;
linearSize = 2048;
maxWidth = 1024;
maxHeight = 1024;
break;
case FB_ACCEL_NEOMAGIC_NM2160:
videoRam = 2048;
maxClock = 90000;
CursorMem = 1024;
CursorOff = 0x100;
linearSize = 2048;
maxWidth = 1024;
maxHeight = 1024;
break;
case FB_ACCEL_NEOMAGIC_NM2200:
videoRam = 2560;
maxClock = 110000;
CursorMem = 1024;
CursorOff = 0x1000;
linearSize = 4096;
maxWidth = 1280;
maxHeight = 1024; /* ???? */
par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
break;
case FB_ACCEL_NEOMAGIC_NM2230:
videoRam = 3008;
maxClock = 110000;
CursorMem = 1024;
CursorOff = 0x1000;
linearSize = 4096;
maxWidth = 1280;
maxHeight = 1024; /* ???? */
par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
break;
case FB_ACCEL_NEOMAGIC_NM2360:
videoRam = 4096;
maxClock = 110000;
CursorMem = 1024;
CursorOff = 0x1000;
linearSize = 4096;
maxWidth = 1280;
maxHeight = 1024; /* ???? */
par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
break;
case FB_ACCEL_NEOMAGIC_NM2380:
videoRam = 6144;
maxClock = 110000;
break;
}
switch (info->fix.accel) {
case FB_ACCEL_NEOMAGIC_NM2070:
case FB_ACCEL_NEOMAGIC_NM2090:
case FB_ACCEL_NEOMAGIC_NM2093:
CursorMem = 2048;
CursorOff = 0x100;
break;
case FB_ACCEL_NEOMAGIC_NM2097:
case FB_ACCEL_NEOMAGIC_NM2160:
CursorMem = 1024;
CursorOff = 0x100;
break;
case FB_ACCEL_NEOMAGIC_NM2200:
case FB_ACCEL_NEOMAGIC_NM2230:
case FB_ACCEL_NEOMAGIC_NM2360:
case FB_ACCEL_NEOMAGIC_NM2380:
CursorMem = 1024;
CursorOff = 0x1000;
linearSize = 8192;
maxWidth = 1280;
maxHeight = 1024; /* ???? */
par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
break;
@ -2032,7 +1981,7 @@ static int __devinit neo_init_hw(struct fb_info *info)
*/
par->maxClock = maxClock;
par->cursorOff = CursorOff;
return ((videoRam * 1024));
return videoRam * 1024;
}