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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>
This commit is contained in:
Krzysztof Helt
Linus Torvalds
parent
9199ec5c5f
commit
060b6002b1
@ -647,31 +647,17 @@ static int cirrusfb_check_var(struct fb_var_screeninfo *var,
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{ -1, -1 } };
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switch (var->bits_per_pixel) {
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case 0 ... 1:
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var->bits_per_pixel = 1;
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case 1:
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nom = 4;
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den = 8;
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break; /* 8 pixel per byte, only 1/4th of mem usable */
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case 2 ... 8:
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var->bits_per_pixel = 8;
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nom = 1;
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case 8:
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case 16:
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case 24:
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case 32:
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nom = var->bits_per_pixel / 8;
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den = 1;
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break; /* 1 pixel == 1 byte */
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case 9 ... 16:
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var->bits_per_pixel = 16;
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nom = 2;
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den = 1;
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break; /* 2 bytes per pixel */
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case 17 ... 24:
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var->bits_per_pixel = 24;
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nom = 3;
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den = 1;
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break; /* 3 bytes per pixel */
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case 25 ... 32:
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var->bits_per_pixel = 32;
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nom = 4;
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den = 1;
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break; /* 4 bytes per pixel */
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default:
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printk(KERN_ERR "cirrusfb: mode %dx%dx%d rejected..."
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"color depth not supported.\n",
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@ -732,19 +718,15 @@ static int cirrusfb_check_var(struct fb_var_screeninfo *var,
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case 1:
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var->red.offset = 0;
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var->red.length = 1;
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var->green.offset = 0;
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var->green.length = 1;
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var->blue.offset = 0;
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var->blue.length = 1;
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var->green = var->red;
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var->blue = var->red;
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break;
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case 8:
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var->red.offset = 0;
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var->red.length = 6;
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var->green.offset = 0;
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var->green.length = 6;
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var->blue.offset = 0;
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var->blue.length = 6;
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var->green = var->red;
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var->blue = var->red;
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break;
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case 16:
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@ -763,20 +745,6 @@ static int cirrusfb_check_var(struct fb_var_screeninfo *var,
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break;
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case 24:
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if (isPReP) {
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var->red.offset = 8;
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var->green.offset = 16;
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var->blue.offset = 24;
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} else {
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var->red.offset = 16;
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var->green.offset = 8;
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var->blue.offset = 0;
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}
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var->red.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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break;
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case 32:
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if (isPReP) {
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var->red.offset = 8;
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@ -828,7 +796,7 @@ static int cirrusfb_decode_var(const struct fb_var_screeninfo *var,
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{
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long freq;
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long maxclock;
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int maxclockidx = 0;
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int maxclockidx = var->bits_per_pixel >> 3;
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struct cirrusfb_info *cinfo = info->par;
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int xres, hfront, hsync, hback;
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int yres, vfront, vsync, vback;
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@ -837,31 +805,18 @@ static int cirrusfb_decode_var(const struct fb_var_screeninfo *var,
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case 1:
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regs->line_length = var->xres_virtual / 8;
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regs->visual = FB_VISUAL_MONO10;
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maxclockidx = 0;
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break;
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case 8:
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regs->line_length = var->xres_virtual;
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regs->visual = FB_VISUAL_PSEUDOCOLOR;
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maxclockidx = 1;
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break;
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case 16:
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regs->line_length = var->xres_virtual * 2;
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regs->visual = FB_VISUAL_DIRECTCOLOR;
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maxclockidx = 2;
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break;
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case 24:
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regs->line_length = var->xres_virtual * 3;
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regs->visual = FB_VISUAL_DIRECTCOLOR;
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maxclockidx = 3;
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break;
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case 32:
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regs->line_length = var->xres_virtual * 4;
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regs->line_length = var->xres_virtual * maxclockidx;
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regs->visual = FB_VISUAL_DIRECTCOLOR;
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maxclockidx = 4;
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break;
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default:
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@ -874,7 +829,7 @@ static int cirrusfb_decode_var(const struct fb_var_screeninfo *var,
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regs->type = FB_TYPE_PACKED_PIXELS;
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/* convert from ps to kHz */
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freq = 1000000000 / var->pixclock;
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freq = PICOS2KHZ(var->pixclock);
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DPRINTK("desired pixclock: %ld kHz\n", freq);
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@ -1213,7 +1168,8 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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break;
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case BT_PICCOLO:
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DPRINTK("(for Piccolo)\n");
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case BT_SPECTRUM:
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DPRINTK("(for Piccolo/Spectrum)\n");
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/* ### ueberall 0x22? */
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/* ##vorher 1c MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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@ -1229,15 +1185,6 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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vga_wseq(regbase, CL_SEQRF, 0xd0);
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break;
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case BT_SPECTRUM:
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DPRINTK("(for Spectrum)\n");
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/* ### ueberall 0x22? */
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/* ##vorher 1c MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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/* evtl d0? avoid FIFO underruns..? */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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break;
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case BT_PICASSO4:
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case BT_ALPINE:
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case BT_GD5480:
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@ -1306,19 +1253,7 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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break;
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case BT_PICCOLO:
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/* ### vorher 1c MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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break;
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case BT_PICASSO:
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/* ### vorher 1c MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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break;
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case BT_SPECTRUM:
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/* ### vorher 1c MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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@ -1385,6 +1320,7 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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break;
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case BT_PICCOLO:
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case BT_SPECTRUM:
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vga_wseq(regbase, CL_SEQR7, 0x87);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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@ -1400,14 +1336,6 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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break;
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case BT_SPECTRUM:
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vga_wseq(regbase, CL_SEQR7, 0x87);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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/* MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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break;
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case BT_PICASSO4:
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vga_wseq(regbase, CL_SEQR7, 0x27);
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/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
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@ -1473,6 +1401,7 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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break;
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case BT_PICCOLO:
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case BT_SPECTRUM:
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vga_wseq(regbase, CL_SEQR7, 0x85);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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@ -1488,14 +1417,6 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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break;
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case BT_SPECTRUM:
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vga_wseq(regbase, CL_SEQR7, 0x85);
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/* Fast Page-Mode writes */
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vga_wseq(regbase, CL_SEQRF, 0xb0);
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/* MCLK select */
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vga_wseq(regbase, CL_SEQR1F, 0x22);
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break;
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case BT_PICASSO4:
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vga_wseq(regbase, CL_SEQR7, 0x25);
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/* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
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@ -1662,18 +1583,7 @@ static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
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(green << info->var.green.offset) |
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(blue << info->var.blue.offset);
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switch (info->var.bits_per_pixel) {
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case 8:
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cinfo->pseudo_palette[regno] = v;
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break;
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case 16:
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cinfo->pseudo_palette[regno] = v;
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break;
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case 24:
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case 32:
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cinfo->pseudo_palette[regno] = v;
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break;
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}
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return 0;
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}
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@ -1743,12 +1653,8 @@ static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
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vga_wcrt(cinfo->regbase, CL_CRT1B, tmp2);
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/* construct bit 19 of screen start address */
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if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) {
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tmp2 = 0;
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if (base & 0x80000)
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tmp2 = 0x80;
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vga_wcrt(cinfo->regbase, CL_CRT1D, tmp2);
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}
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if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19)
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vga_wcrt(cinfo->regbase, CL_CRT1D, (base >> 12) & 0x80);
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/* write pixel panning value to AR33; this does not quite work in 8bpp
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*
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@ -2139,38 +2045,15 @@ static void switch_monitor(struct cirrusfb_info *cinfo, int on)
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/* Linux 2.6-style accelerated functions */
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/******************************************/
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static void cirrusfb_prim_fillrect(struct fb_info *info,
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const struct fb_fillrect *region)
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{
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struct cirrusfb_info *cinfo = info->par;
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int m; /* bytes per pixel */
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u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
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cinfo->pseudo_palette[region->color] : region->color;
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if (info->var.bits_per_pixel == 1) {
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cirrusfb_RectFill(cinfo->regbase,
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info->var.bits_per_pixel,
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region->dx / 8, region->dy,
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region->width / 8, region->height,
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color,
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cinfo->currentmode.line_length);
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} else {
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m = (info->var.bits_per_pixel + 7) / 8;
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cirrusfb_RectFill(cinfo->regbase,
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info->var.bits_per_pixel,
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region->dx * m, region->dy,
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region->width * m, region->height,
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color,
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cinfo->currentmode.line_length);
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}
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return;
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}
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static void cirrusfb_fillrect(struct fb_info *info,
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const struct fb_fillrect *region)
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{
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struct fb_fillrect modded;
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int vxres, vyres;
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struct cirrusfb_info *cinfo = info->par;
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int m = info->var.bits_per_pixel;
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u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
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cinfo->pseudo_palette[region->color] : region->color;
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if (info->state != FBINFO_STATE_RUNNING)
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return;
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@ -2193,30 +2076,12 @@ static void cirrusfb_fillrect(struct fb_info *info,
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if (modded.dy + modded.height > vyres)
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modded.height = vyres - modded.dy;
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cirrusfb_prim_fillrect(info, &modded);
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}
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static void cirrusfb_prim_copyarea(struct fb_info *info,
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const struct fb_copyarea *area)
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{
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struct cirrusfb_info *cinfo = info->par;
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int m; /* bytes per pixel */
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if (info->var.bits_per_pixel == 1) {
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cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
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area->sx / 8, area->sy,
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area->dx / 8, area->dy,
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area->width / 8, area->height,
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cirrusfb_RectFill(cinfo->regbase,
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info->var.bits_per_pixel,
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(region->dx * m) / 8, region->dy,
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(region->width * m) / 8, region->height,
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color,
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cinfo->currentmode.line_length);
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} else {
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m = (info->var.bits_per_pixel + 7) / 8;
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cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
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area->sx * m, area->sy,
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area->dx * m, area->dy,
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area->width * m, area->height,
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cinfo->currentmode.line_length);
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}
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return;
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}
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static void cirrusfb_copyarea(struct fb_info *info,
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@ -2224,13 +2089,8 @@ static void cirrusfb_copyarea(struct fb_info *info,
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{
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struct fb_copyarea modded;
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u32 vxres, vyres;
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modded.sx = area->sx;
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modded.sy = area->sy;
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modded.dx = area->dx;
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modded.dy = area->dy;
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modded.width = area->width;
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modded.height = area->height;
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struct cirrusfb_info *cinfo = info->par;
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int m = info->var.bits_per_pixel;
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if (info->state != FBINFO_STATE_RUNNING)
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return;
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@ -2241,6 +2101,7 @@ static void cirrusfb_copyarea(struct fb_info *info,
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vxres = info->var.xres_virtual;
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vyres = info->var.yres_virtual;
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memcpy(&modded, area, sizeof(struct fb_copyarea));
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if (!modded.width || !modded.height ||
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modded.sx >= vxres || modded.sy >= vyres ||
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@ -2256,7 +2117,12 @@ static void cirrusfb_copyarea(struct fb_info *info,
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if (modded.dy + modded.height > vyres)
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modded.height = vyres - modded.dy;
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cirrusfb_prim_copyarea(info, &modded);
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cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
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(area->sx * m) / 8, area->sy,
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(area->dx * m) / 8, area->dy,
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(area->width * m) / 8, area->height,
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cinfo->currentmode.line_length);
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}
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static void cirrusfb_imageblit(struct fb_info *info,
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@ -2366,7 +2232,6 @@ static void cirrusfb_pci_unmap(struct fb_info *info)
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if (release_io_ports)
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release_region(0x3C0, 32);
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pci_release_regions(pdev);
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framebuffer_release(info);
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}
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#endif /* CONFIG_PCI */
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@ -2383,7 +2248,6 @@ static void __devexit cirrusfb_zorro_unmap(struct cirrusfb_info *cinfo)
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if (zorro_resource_start(cinfo->zdev) > 0x01000000)
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iounmap(info->screen_base);
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}
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framebuffer_release(cinfo->info);
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}
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#endif /* CONFIG_ZORRO */
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@ -2481,6 +2345,7 @@ err_dealloc_cmap:
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fb_dealloc_cmap(&info->cmap);
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err_unmap_cirrusfb:
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cinfo->unmap(info);
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framebuffer_release(info);
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return err;
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}
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@ -2495,6 +2360,7 @@ static void __devexit cirrusfb_cleanup(struct fb_info *info)
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fb_dealloc_cmap(&info->cmap);
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printk("Framebuffer unregistered\n");
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cinfo->unmap(info);
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framebuffer_release(info);
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DPRINTK("EXIT\n");
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}
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