cirrusfb: code improvements
This patch does some "short-range" code improvements like merging identical
switch clauses, replacing conditional branches with calculation of values,
merging only once-used functions into place they are called from.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c
index ebb8ddb..5630665 100644
--- a/drivers/video/cirrusfb.c
+++ b/drivers/video/cirrusfb.c
@@ -647,31 +647,17 @@
{ -1, -1 } };
switch (var->bits_per_pixel) {
- case 0 ... 1:
- var->bits_per_pixel = 1;
+ case 1:
nom = 4;
den = 8;
break; /* 8 pixel per byte, only 1/4th of mem usable */
- case 2 ... 8:
- var->bits_per_pixel = 8;
- nom = 1;
+ case 8:
+ case 16:
+ case 24:
+ case 32:
+ nom = var->bits_per_pixel / 8;
den = 1;
break; /* 1 pixel == 1 byte */
- case 9 ... 16:
- var->bits_per_pixel = 16;
- nom = 2;
- den = 1;
- break; /* 2 bytes per pixel */
- case 17 ... 24:
- var->bits_per_pixel = 24;
- nom = 3;
- den = 1;
- break; /* 3 bytes per pixel */
- case 25 ... 32:
- var->bits_per_pixel = 32;
- nom = 4;
- den = 1;
- break; /* 4 bytes per pixel */
default:
printk(KERN_ERR "cirrusfb: mode %dx%dx%d rejected..."
"color depth not supported.\n",
@@ -732,19 +718,15 @@
case 1:
var->red.offset = 0;
var->red.length = 1;
- var->green.offset = 0;
- var->green.length = 1;
- var->blue.offset = 0;
- var->blue.length = 1;
+ var->green = var->red;
+ var->blue = var->red;
break;
case 8:
var->red.offset = 0;
var->red.length = 6;
- var->green.offset = 0;
- var->green.length = 6;
- var->blue.offset = 0;
- var->blue.length = 6;
+ var->green = var->red;
+ var->blue = var->red;
break;
case 16:
@@ -763,20 +745,6 @@
break;
case 24:
- if (isPReP) {
- var->red.offset = 8;
- var->green.offset = 16;
- var->blue.offset = 24;
- } else {
- var->red.offset = 16;
- var->green.offset = 8;
- var->blue.offset = 0;
- }
- var->red.length = 8;
- var->green.length = 8;
- var->blue.length = 8;
- break;
-
case 32:
if (isPReP) {
var->red.offset = 8;
@@ -828,7 +796,7 @@
{
long freq;
long maxclock;
- int maxclockidx = 0;
+ int maxclockidx = var->bits_per_pixel >> 3;
struct cirrusfb_info *cinfo = info->par;
int xres, hfront, hsync, hback;
int yres, vfront, vsync, vback;
@@ -837,31 +805,18 @@
case 1:
regs->line_length = var->xres_virtual / 8;
regs->visual = FB_VISUAL_MONO10;
- maxclockidx = 0;
break;
case 8:
regs->line_length = var->xres_virtual;
regs->visual = FB_VISUAL_PSEUDOCOLOR;
- maxclockidx = 1;
break;
case 16:
- regs->line_length = var->xres_virtual * 2;
- regs->visual = FB_VISUAL_DIRECTCOLOR;
- maxclockidx = 2;
- break;
-
case 24:
- regs->line_length = var->xres_virtual * 3;
- regs->visual = FB_VISUAL_DIRECTCOLOR;
- maxclockidx = 3;
- break;
-
case 32:
- regs->line_length = var->xres_virtual * 4;
+ regs->line_length = var->xres_virtual * maxclockidx;
regs->visual = FB_VISUAL_DIRECTCOLOR;
- maxclockidx = 4;
break;
default:
@@ -874,7 +829,7 @@
regs->type = FB_TYPE_PACKED_PIXELS;
/* convert from ps to kHz */
- freq = 1000000000 / var->pixclock;
+ freq = PICOS2KHZ(var->pixclock);
DPRINTK("desired pixclock: %ld kHz\n", freq);
@@ -1213,7 +1168,8 @@
break;
case BT_PICCOLO:
- DPRINTK("(for Piccolo)\n");
+ case BT_SPECTRUM:
+ DPRINTK("(for Piccolo/Spectrum)\n");
/* ### ueberall 0x22? */
/* ##vorher 1c MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
@@ -1229,15 +1185,6 @@
vga_wseq(regbase, CL_SEQRF, 0xd0);
break;
- case BT_SPECTRUM:
- DPRINTK("(for Spectrum)\n");
- /* ### ueberall 0x22? */
- /* ##vorher 1c MCLK select */
- vga_wseq(regbase, CL_SEQR1F, 0x22);
- /* evtl d0? avoid FIFO underruns..? */
- vga_wseq(regbase, CL_SEQRF, 0xb0);
- break;
-
case BT_PICASSO4:
case BT_ALPINE:
case BT_GD5480:
@@ -1306,19 +1253,7 @@
break;
case BT_PICCOLO:
- /* ### vorher 1c MCLK select */
- vga_wseq(regbase, CL_SEQR1F, 0x22);
- /* Fast Page-Mode writes */
- vga_wseq(regbase, CL_SEQRF, 0xb0);
- break;
-
case BT_PICASSO:
- /* ### vorher 1c MCLK select */
- vga_wseq(regbase, CL_SEQR1F, 0x22);
- /* Fast Page-Mode writes */
- vga_wseq(regbase, CL_SEQRF, 0xb0);
- break;
-
case BT_SPECTRUM:
/* ### vorher 1c MCLK select */
vga_wseq(regbase, CL_SEQR1F, 0x22);
@@ -1385,6 +1320,7 @@
break;
case BT_PICCOLO:
+ case BT_SPECTRUM:
vga_wseq(regbase, CL_SEQR7, 0x87);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
@@ -1400,14 +1336,6 @@
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
- case BT_SPECTRUM:
- vga_wseq(regbase, CL_SEQR7, 0x87);
- /* Fast Page-Mode writes */
- vga_wseq(regbase, CL_SEQRF, 0xb0);
- /* MCLK select */
- vga_wseq(regbase, CL_SEQR1F, 0x22);
- break;
-
case BT_PICASSO4:
vga_wseq(regbase, CL_SEQR7, 0x27);
/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
@@ -1473,6 +1401,7 @@
break;
case BT_PICCOLO:
+ case BT_SPECTRUM:
vga_wseq(regbase, CL_SEQR7, 0x85);
/* Fast Page-Mode writes */
vga_wseq(regbase, CL_SEQRF, 0xb0);
@@ -1488,14 +1417,6 @@
vga_wseq(regbase, CL_SEQR1F, 0x22);
break;
- case BT_SPECTRUM:
- vga_wseq(regbase, CL_SEQR7, 0x85);
- /* Fast Page-Mode writes */
- vga_wseq(regbase, CL_SEQRF, 0xb0);
- /* MCLK select */
- vga_wseq(regbase, CL_SEQR1F, 0x22);
- break;
-
case BT_PICASSO4:
vga_wseq(regbase, CL_SEQR7, 0x25);
/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
@@ -1662,18 +1583,7 @@
(green << info->var.green.offset) |
(blue << info->var.blue.offset);
- switch (info->var.bits_per_pixel) {
- case 8:
- cinfo->pseudo_palette[regno] = v;
- break;
- case 16:
- cinfo->pseudo_palette[regno] = v;
- break;
- case 24:
- case 32:
- cinfo->pseudo_palette[regno] = v;
- break;
- }
+ cinfo->pseudo_palette[regno] = v;
return 0;
}
@@ -1743,12 +1653,8 @@
vga_wcrt(cinfo->regbase, CL_CRT1B, tmp2);
/* construct bit 19 of screen start address */
- if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) {
- tmp2 = 0;
- if (base & 0x80000)
- tmp2 = 0x80;
- vga_wcrt(cinfo->regbase, CL_CRT1D, tmp2);
- }
+ if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19)
+ vga_wcrt(cinfo->regbase, CL_CRT1D, (base >> 12) & 0x80);
/* write pixel panning value to AR33; this does not quite work in 8bpp
*
@@ -2139,38 +2045,15 @@
/* Linux 2.6-style accelerated functions */
/******************************************/
-static void cirrusfb_prim_fillrect(struct fb_info *info,
- const struct fb_fillrect *region)
-{
- struct cirrusfb_info *cinfo = info->par;
- int m; /* bytes per pixel */
- u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
- cinfo->pseudo_palette[region->color] : region->color;
-
- if (info->var.bits_per_pixel == 1) {
- cirrusfb_RectFill(cinfo->regbase,
- info->var.bits_per_pixel,
- region->dx / 8, region->dy,
- region->width / 8, region->height,
- color,
- cinfo->currentmode.line_length);
- } else {
- m = (info->var.bits_per_pixel + 7) / 8;
- cirrusfb_RectFill(cinfo->regbase,
- info->var.bits_per_pixel,
- region->dx * m, region->dy,
- region->width * m, region->height,
- color,
- cinfo->currentmode.line_length);
- }
- return;
-}
-
static void cirrusfb_fillrect(struct fb_info *info,
const struct fb_fillrect *region)
{
struct fb_fillrect modded;
int vxres, vyres;
+ struct cirrusfb_info *cinfo = info->par;
+ int m = info->var.bits_per_pixel;
+ u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
+ cinfo->pseudo_palette[region->color] : region->color;
if (info->state != FBINFO_STATE_RUNNING)
return;
@@ -2193,30 +2076,12 @@
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
- cirrusfb_prim_fillrect(info, &modded);
-}
-
-static void cirrusfb_prim_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
- struct cirrusfb_info *cinfo = info->par;
- int m; /* bytes per pixel */
-
- if (info->var.bits_per_pixel == 1) {
- cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
- area->sx / 8, area->sy,
- area->dx / 8, area->dy,
- area->width / 8, area->height,
- cinfo->currentmode.line_length);
- } else {
- m = (info->var.bits_per_pixel + 7) / 8;
- cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
- area->sx * m, area->sy,
- area->dx * m, area->dy,
- area->width * m, area->height,
- cinfo->currentmode.line_length);
- }
- return;
+ cirrusfb_RectFill(cinfo->regbase,
+ info->var.bits_per_pixel,
+ (region->dx * m) / 8, region->dy,
+ (region->width * m) / 8, region->height,
+ color,
+ cinfo->currentmode.line_length);
}
static void cirrusfb_copyarea(struct fb_info *info,
@@ -2224,13 +2089,8 @@
{
struct fb_copyarea modded;
u32 vxres, vyres;
-
- modded.sx = area->sx;
- modded.sy = area->sy;
- modded.dx = area->dx;
- modded.dy = area->dy;
- modded.width = area->width;
- modded.height = area->height;
+ struct cirrusfb_info *cinfo = info->par;
+ int m = info->var.bits_per_pixel;
if (info->state != FBINFO_STATE_RUNNING)
return;
@@ -2241,6 +2101,7 @@
vxres = info->var.xres_virtual;
vyres = info->var.yres_virtual;
+ memcpy(&modded, area, sizeof(struct fb_copyarea));
if (!modded.width || !modded.height ||
modded.sx >= vxres || modded.sy >= vyres ||
@@ -2256,7 +2117,12 @@
if (modded.dy + modded.height > vyres)
modded.height = vyres - modded.dy;
- cirrusfb_prim_copyarea(info, &modded);
+ cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
+ (area->sx * m) / 8, area->sy,
+ (area->dx * m) / 8, area->dy,
+ (area->width * m) / 8, area->height,
+ cinfo->currentmode.line_length);
+
}
static void cirrusfb_imageblit(struct fb_info *info,
@@ -2366,7 +2232,6 @@
if (release_io_ports)
release_region(0x3C0, 32);
pci_release_regions(pdev);
- framebuffer_release(info);
}
#endif /* CONFIG_PCI */
@@ -2383,7 +2248,6 @@
if (zorro_resource_start(cinfo->zdev) > 0x01000000)
iounmap(info->screen_base);
}
- framebuffer_release(cinfo->info);
}
#endif /* CONFIG_ZORRO */
@@ -2481,6 +2345,7 @@
fb_dealloc_cmap(&info->cmap);
err_unmap_cirrusfb:
cinfo->unmap(info);
+ framebuffer_release(info);
return err;
}
@@ -2495,6 +2360,7 @@
fb_dealloc_cmap(&info->cmap);
printk("Framebuffer unregistered\n");
cinfo->unmap(info);
+ framebuffer_release(info);
DPRINTK("EXIT\n");
}