From 4f05b53b28cc7a2b868bc13d19d88cd858e759b6 Mon Sep 17 00:00:00 2001 From: Krzysztof Helt Date: Tue, 16 Oct 2007 01:28:48 -0700 Subject: tdfxfb: code improvements This patch improves source code mainly by killing redundant variable loads, reducing number of variables, simplifying conditional branches, etc. Signed-off-by: Krzysztof Helt Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/tdfxfb.c | 161 +++++++++++++++---------------------------------- 1 file changed, 47 insertions(+), 114 deletions(-) (limited to 'drivers/video/tdfxfb.c') diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c index c032f6feb13e..7d0c50e3a40b 100644 --- a/drivers/video/tdfxfb.c +++ b/drivers/video/tdfxfb.c @@ -63,12 +63,9 @@ #include #include #include -#include -#include #include #include #include -#include #include #include #include @@ -159,26 +156,15 @@ static char *mode_option __devinitdata = NULL; * Hardware-specific funcions * ------------------------------------------------------------------------- */ -#ifdef VGA_REG_IO -static inline u8 vga_inb(struct tdfx_par *par, u32 reg) -{ - return inb(reg); -} - -static inline void vga_outb(struct tdfx_par *par, u32 reg, u8 val) -{ - outb(val, reg); -} -#else static inline u8 vga_inb(struct tdfx_par *par, u32 reg) { return inb(par->iobase + reg - 0x300); } + static inline void vga_outb(struct tdfx_par *par, u32 reg, u8 val) { outb(val, par->iobase + reg - 0x300); } -#endif static inline void gra_outb(struct tdfx_par *par, u32 idx, u8 val) { @@ -279,11 +265,11 @@ static int banshee_wait_idle(struct fb_info *info) banshee_make_room(par, 1); tdfx_outl(par, COMMAND_3D, COMMAND_3D_NOP); - while (1) { - i = (tdfx_inl(par, STATUS) & STATUS_BUSY) ? 0 : i + 1; - if (i == 3) - break; - } + do { + if ((tdfx_inl(par, STATUS) & STATUS_BUSY) == 0) + i++; + } while (i < 3); + return 0; } @@ -313,16 +299,17 @@ static u32 do_calc_pll(int freq, int *freq_out) * Estimate value of n that produces target frequency * with current m and k */ - int n_estimated = (freq * (m + 2) * (1 << k) / fref) - 2; + int n_estimated = ((freq * (m + 2) << k) / fref) - 2; /* Search neighborhood of estimated n */ - for (n = max(0, n_estimated - 1); - n <= min(255, n_estimated + 1); n++) { + for (n = max(0, n_estimated); + n <= min(255, n_estimated + 1); + n++) { /* * Calculate PLL freqency with current m, k and * estimated n */ - int f = fref * (n + 2) / (m + 2) / (1 << k); + int f = (fref * (n + 2) / (m + 2)) >> k; int error = abs(f - freq); /* @@ -342,7 +329,7 @@ static u32 do_calc_pll(int freq, int *freq_out) n = best_n; m = best_m; k = best_k; - *freq_out = fref * (n + 2) / (m + 2) / (1 << k); + *freq_out = (fref * (n + 2) / (m + 2)) >> k; return (n << 8) | (m << 2) | k; } @@ -387,7 +374,7 @@ static void do_write_regs(struct fb_info *info, struct banshee_reg *reg) vga_enable_palette(par); vga_enable_video(par); - banshee_make_room(par, 11); + banshee_make_room(par, 9); tdfx_outl(par, VGAINIT0, reg->vgainit0); tdfx_outl(par, DACMODE, reg->dacmode); tdfx_outl(par, VIDDESKSTRIDE, reg->stride); @@ -400,8 +387,8 @@ static void do_write_regs(struct fb_info *info, struct banshee_reg *reg) tdfx_outl(par, MISCINIT0, reg->miscinit0); banshee_make_room(par, 8); - tdfx_outl(par, SRCBASE, reg->srcbase); - tdfx_outl(par, DSTBASE, reg->dstbase); + tdfx_outl(par, SRCBASE, reg->startaddr); + tdfx_outl(par, DSTBASE, reg->startaddr); tdfx_outl(par, COMMANDEXTRA_2D, 0); tdfx_outl(par, CLIP0MIN, 0); tdfx_outl(par, CLIP0MAX, 0x0fff0fff); @@ -414,32 +401,24 @@ static void do_write_regs(struct fb_info *info, struct banshee_reg *reg) static unsigned long do_lfb_size(struct tdfx_par *par, unsigned short dev_id) { - u32 draminit0; - u32 draminit1; + u32 draminit0 = tdfx_inl(par, DRAMINIT0); + u32 draminit1 = tdfx_inl(par, DRAMINIT1); u32 miscinit1; - - int num_chips; + int num_chips = (draminit0 & DRAMINIT0_SGRAM_NUM) ? 8 : 4; int chip_size; /* in MB */ - u32 lfbsize; - int has_sgram; - - draminit0 = tdfx_inl(par, DRAMINIT0); - draminit1 = tdfx_inl(par, DRAMINIT1); - - num_chips = (draminit0 & DRAMINIT0_SGRAM_NUM) ? 8 : 4; + int has_sgram = draminit1 & DRAMINIT1_MEM_SDRAM; if (dev_id < PCI_DEVICE_ID_3DFX_VOODOO5) { /* Banshee/Voodoo3 */ - has_sgram = draminit1 & DRAMINIT1_MEM_SDRAM; chip_size = 2; - if (has_sgram) - chip_size = (draminit0 & DRAMINIT0_SGRAM_TYPE) ? 2 : 1; + if (has_sgram && (draminit0 & DRAMINIT0_SGRAM_TYPE)) + chip_size = 1; } else { /* Voodoo4/5 */ has_sgram = 0; - chip_size = 1 << ((draminit0 & DRAMINIT0_SGRAM_TYPE_MASK) >> DRAMINIT0_SGRAM_TYPE_SHIFT); + chip_size = draminit0 & DRAMINIT0_SGRAM_TYPE_MASK; + chip_size = 1 << (chip_size >> DRAMINIT0_SGRAM_TYPE_SHIFT); } - lfbsize = num_chips * chip_size * 1024 * 1024; /* disable block writes for SDRAM */ miscinit1 = tdfx_inl(par, MISCINIT1); @@ -448,7 +427,7 @@ static unsigned long do_lfb_size(struct tdfx_par *par, unsigned short dev_id) banshee_make_room(par, 1); tdfx_outl(par, MISCINIT1, miscinit1); - return lfbsize; + return num_chips * chip_size * 1024l * 1024; } /* ------------------------------------------------------------------------- */ @@ -548,17 +527,18 @@ static int tdfxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) static int tdfxfb_set_par(struct fb_info *info) { struct tdfx_par *par = info->par; - u32 hdispend, hsyncsta, hsyncend, htotal; + u32 hdispend = info->var.xres; + u32 hsyncsta = hdispend + info->var.right_margin; + u32 hsyncend = hsyncsta + info->var.hsync_len; + u32 htotal = hsyncend + info->var.left_margin; u32 hd, hs, he, ht, hbs, hbe; u32 vd, vs, ve, vt, vbs, vbe; struct banshee_reg reg; int fout, freq; - u32 wd, cpp; - - par->baseline = 0; + u32 wd; + u32 cpp = (info->var.bits_per_pixel + 7) >> 3; memset(®, 0, sizeof(reg)); - cpp = (info->var.bits_per_pixel + 7) / 8; reg.vidcfg = VIDCFG_VIDPROC_ENABLE | VIDCFG_DESK_ENABLE | VIDCFG_CURS_X11 | @@ -568,14 +548,8 @@ static int tdfxfb_set_par(struct fb_info *info) /* PLL settings */ freq = PICOS2KHZ(info->var.pixclock); - reg.dacmode = 0; reg.vidcfg &= ~VIDCFG_2X; - hdispend = info->var.xres; - hsyncsta = hdispend + info->var.right_margin; - hsyncend = hsyncsta + info->var.hsync_len; - htotal = hsyncend + info->var.left_margin; - if (freq > par->max_pixclock / 2) { freq = freq > par->max_pixclock ? par->max_pixclock : freq; reg.dacmode |= DACMODE_2X; @@ -598,11 +572,16 @@ static int tdfxfb_set_par(struct fb_info *info) vs = vd + (info->var.lower_margin << 1); ve = vs + (info->var.vsync_len << 1); vbe = vt = ve + (info->var.upper_margin << 1) - 1; + reg.screensize = info->var.xres | (info->var.yres << 13); + reg.vidcfg |= VIDCFG_HALF_MODE; + reg.crt[0x09] = 0x80; } else { vbs = vd = info->var.yres - 1; vs = vd + info->var.lower_margin; ve = vs + info->var.vsync_len; vbe = vt = ve + info->var.upper_margin - 1; + reg.screensize = info->var.xres | (info->var.yres << 12); + reg.vidcfg &= ~VIDCFG_HALF_MODE; } /* this is all pretty standard VGA register stuffing */ @@ -611,11 +590,6 @@ static int tdfxfb_set_par(struct fb_info *info) info->var.xres < 480 ? 0x60 : info->var.xres < 768 ? 0xe0 : 0x20); - reg.gra[0x00] = 0x00; - reg.gra[0x01] = 0x00; - reg.gra[0x02] = 0x00; - reg.gra[0x03] = 0x00; - reg.gra[0x04] = 0x00; reg.gra[0x05] = 0x40; reg.gra[0x06] = 0x05; reg.gra[0x07] = 0x0f; @@ -638,10 +612,7 @@ static int tdfxfb_set_par(struct fb_info *info) reg.att[0x0e] = 0x0e; reg.att[0x0f] = 0x0f; reg.att[0x10] = 0x41; - reg.att[0x11] = 0x00; reg.att[0x12] = 0x0f; - reg.att[0x13] = 0x00; - reg.att[0x14] = 0x00; reg.seq[0x00] = 0x03; reg.seq[0x01] = 0x01; /* fixme: clkdiv2? */ @@ -663,19 +634,11 @@ static int tdfxfb_set_par(struct fb_info *info) ((vs & 0x100) >> 6) | ((vd & 0x100) >> 7) | ((vt & 0x100) >> 8); - reg.crt[0x08] = 0x00; - reg.crt[0x09] = 0x40 | ((vbs & 0x200) >> 4); - reg.crt[0x0a] = 0x00; - reg.crt[0x0b] = 0x00; - reg.crt[0x0c] = 0x00; - reg.crt[0x0d] = 0x00; - reg.crt[0x0e] = 0x00; - reg.crt[0x0f] = 0x00; + reg.crt[0x09] |= 0x40 | ((vbs & 0x200) >> 4); reg.crt[0x10] = vs; reg.crt[0x11] = (ve & 0x0f) | 0x20; reg.crt[0x12] = vd; reg.crt[0x13] = wd; - reg.crt[0x14] = 0x00; reg.crt[0x15] = vbs; reg.crt[0x16] = vbe + 1; reg.crt[0x17] = 0xc3; @@ -706,34 +669,15 @@ static int tdfxfb_set_par(struct fb_info *info) reg.cursc1 = 0xffffff; reg.stride = info->var.xres * cpp; - reg.startaddr = par->baseline * reg.stride; - reg.srcbase = reg.startaddr; - reg.dstbase = reg.startaddr; - - /* PLL settings */ - freq = PICOS2KHZ(info->var.pixclock); + reg.startaddr = info->var.yoffset * reg.stride + + info->var.xoffset * cpp; - reg.dacmode &= ~DACMODE_2X; - reg.vidcfg &= ~VIDCFG_2X; - if (freq > par->max_pixclock / 2) { - freq = freq > par->max_pixclock ? par->max_pixclock : freq; - reg.dacmode |= DACMODE_2X; - reg.vidcfg |= VIDCFG_2X; - } reg.vidpll = do_calc_pll(freq, &fout); #if 0 reg.mempll = do_calc_pll(..., &fout); reg.gfxpll = do_calc_pll(..., &fout); #endif - if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) { - reg.screensize = info->var.xres | (info->var.yres << 13); - reg.vidcfg |= VIDCFG_HALF_MODE; - reg.crt[0x09] |= 0x80; - } else { - reg.screensize = info->var.xres | (info->var.yres << 12); - reg.vidcfg &= ~VIDCFG_HALF_MODE; - } if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) reg.vidcfg |= VIDCFG_INTERLACE; reg.miscinit0 = tdfx_inl(par, MISCINIT0); @@ -758,8 +702,7 @@ static int tdfxfb_set_par(struct fb_info *info) do_write_regs(info, ®); /* Now change fb_fix_screeninfo according to changes in par */ - info->fix.line_length = - info->var.xres * ((info->var.bits_per_pixel + 7) >> 3); + info->fix.line_length = reg.stride; info->fix.visual = (info->var.bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; @@ -821,35 +764,28 @@ static int tdfxfb_setcolreg(unsigned regno, unsigned red, unsigned green, static int tdfxfb_blank(int blank, struct fb_info *info) { struct tdfx_par *par = info->par; - u32 dacmode, state = 0, vgablank = 0; + int vgablank = 1; + u32 dacmode = tdfx_inl(par, DACMODE); - dacmode = tdfx_inl(par, DACMODE); + dacmode &= ~(BIT(1) | BIT(3)); switch (blank) { case FB_BLANK_UNBLANK: /* Screen: On; HSync: On, VSync: On */ - state = 0; vgablank = 0; break; case FB_BLANK_NORMAL: /* Screen: Off; HSync: On, VSync: On */ - state = 0; - vgablank = 1; break; case FB_BLANK_VSYNC_SUSPEND: /* Screen: Off; HSync: On, VSync: Off */ - state = BIT(3); - vgablank = 1; + dacmode |= BIT(3); break; case FB_BLANK_HSYNC_SUSPEND: /* Screen: Off; HSync: Off, VSync: On */ - state = BIT(1); - vgablank = 1; + dacmode |= BIT(1); break; case FB_BLANK_POWERDOWN: /* Screen: Off; HSync: Off, VSync: Off */ - state = BIT(1) | BIT(3); - vgablank = 1; + dacmode |= BIT(1) | BIT(3); break; } - dacmode &= ~(BIT(1) | BIT(3)); - dacmode |= state; banshee_make_room(par, 1); tdfx_outl(par, DACMODE, dacmode); if (vgablank) @@ -866,14 +802,13 @@ static int tdfxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { struct tdfx_par *par = info->par; - u32 addr; + u32 addr = var->yoffset * info->fix.line_length; if (nopan || var->xoffset || (var->yoffset > var->yres_virtual)) return -EINVAL; if ((var->yoffset + var->yres > var->yres_virtual && nowrap)) return -EINVAL; - addr = var->yoffset * info->fix.line_length; banshee_make_room(par, 1); tdfx_outl(par, VIDDESKSTART, addr); @@ -962,7 +897,6 @@ static void tdfxfb_copyarea(struct fb_info *info, dx = 0; } - if (area->sx <= area->dx) { //-X blitcmd |= BIT(14); @@ -1061,8 +995,7 @@ static void tdfxfb_imageblit(struct fb_info *info, const struct fb_image *image) /* Send the leftovers now */ banshee_make_room(par, 3); - i = size % 4; - switch (i) { + switch (size % 4) { case 0: break; case 1: -- cgit v1.2.3