[PATCH] sstfb : Clean ups

From: Alan Cox
Date: Mon Aug 21 2006 - 18:02:59 EST

- Remove 24/32bit unused support (the chips don't do 24/32bit anyway)
- Clean up printk obfuscation
- Clean up lispitus in the if(())()) stuff
- Minor tidying

No functionality changes, may have a crack at hardware scrolling based
on my X driver once the cleanups are in.

Signed-off-by: Alan Cox <alan@xxxxxxxxxx>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.18-rc4-mm2/drivers/video/sstfb.c linux-2.6.18-rc4-mm2/drivers/video/sstfb.c
--- linux.vanilla-2.6.18-rc4-mm2/drivers/video/sstfb.c 2006-08-21 14:17:44.000000000 +0100
+++ linux-2.6.18-rc4-mm2/drivers/video/sstfb.c 2006-08-21 22:08:01.000000000 +0100
@@ -17,7 +17,10 @@
* (port driver to new frambuffer infrastructure)
* 01/2003 Helge Deller <deller@xxxxxx>
* (initial work on fb hardware acceleration for voodoo2)
- *
+ * 08/2006 Alan Cox <alan@xxxxxxxxxx>
+ * Remove never finished and bogus 24/32bit support
+ * Clean up macro abuse
+ * Minor tidying for format.
*/

/*
@@ -40,6 +43,7 @@
through the fifo. warning: issuing a nop command seems to need pci_fifo
-FIXME: in case of failure in the init sequence, be sure we return to a safe
state.
+- FIXME: Use accelerator for 2D scroll
-FIXME: 4MB boards have banked memory (FbiInit2 bits 1 & 20)
*/

@@ -67,9 +71,6 @@

#undef SST_DEBUG

-/* enable 24/32 bpp functions ? (completely untested!) */
-#undef EN_24_32_BPP
-
/*
Default video mode .
0 800x600@60 took from glide
@@ -377,7 +378,11 @@
* sstfb_check_var - Optional function. Validates a var passed in.
* @var: frame buffer variable screen structure
* @info: frame buffer structure that represents a single frame buffer
+ *
+ * Limit to the abilities of a single chip as SLI is not supported
+ * by this driver.
*/
+
static int sstfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
@@ -390,7 +395,7 @@
unsigned int freq;

if (sst_calc_pll(PICOS2KHZ(var->pixclock), &freq, &par->pll)) {
- eprintk("Pixclock at %ld KHZ out of range\n",
+ printk(KERN_ERR "sstfb: Pixclock at %ld KHZ out of range\n",
PICOS2KHZ(var->pixclock));
return -EINVAL;
}
@@ -409,27 +414,15 @@
case 0 ... 16 :
var->bits_per_pixel = 16;
break;
-#ifdef EN_24_32_BPP
- case 17 ... 24 :
- var->bits_per_pixel = 24;
- break;
- case 25 ... 32 :
- var->bits_per_pixel = 32;
- break;
-#endif
default :
- eprintk("Unsupported bpp %d\n", var->bits_per_pixel);
+ printk(KERN_ERR "sstfb: Unsupported bpp %d\n", var->bits_per_pixel);
return -EINVAL;
}

/* validity tests */
- if ((var->xres <= 1) || (yDim <= 0 )
- || (var->hsync_len <= 1)
- || (hSyncOff <= 1)
- || (var->left_margin <= 2)
- || (vSyncOn <= 0)
- || (vSyncOff <= 0)
- || (vBackPorch <= 0)) {
+ if (var->xres <= 1 || yDim <= 0 || var->hsync_len <= 1 ||
+ hSyncOff <= 1 || var->left_margin <= 2 || vSyncOn <= 0 ||
+ vSyncOff <= 0 || vBackPorch <= 0) {
return -EINVAL;
}

@@ -437,21 +430,17 @@
/* Voodoo 2 limits */
tiles_in_X = (var->xres + 63 ) / 64 * 2;

- if (((var->xres - 1) >= POW2(11)) || (yDim >= POW2(11))) {
- eprintk("Unsupported resolution %dx%d\n",
+ if (var->xres > POW2(11) || yDim >= POW2(11)) {
+ printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n",
var->xres, var->yres);
return -EINVAL;
}

- if (((var->hsync_len-1) >= POW2(9))
- || ((hSyncOff-1) >= POW2(11))
- || ((var->left_margin - 2) >= POW2(9))
- || (vSyncOn >= POW2(13))
- || (vSyncOff >= POW2(13))
- || (vBackPorch >= POW2(9))
- || (tiles_in_X >= POW2(6))
- || (tiles_in_X <= 0)) {
- eprintk("Unsupported Timings\n");
+ if (var->hsync_len > POW2(9) || hSyncOff > POW2(11) ||
+ var->left_margin - 2 >= POW2(9) || vSyncOn >= POW2(13) ||
+ vSyncOff >= POW2(13) || vBackPorch >= POW2(9) ||
+ tiles_in_X >= POW2(6) || tiles_in_X <= 0) {
+ printk(KERN_ERR "sstfb: Unsupported timings\n");
return -EINVAL;
}
} else {
@@ -459,24 +448,20 @@
tiles_in_X = (var->xres + 63 ) / 64;

if (var->vmode) {
- eprintk("Interlace/Doublescan not supported %#x\n",
+ printk(KERN_ERR "sstfb: Interlace/doublescan not supported %#x\n",
var->vmode);
return -EINVAL;
}
- if (((var->xres - 1) >= POW2(10)) || (var->yres >= POW2(10))) {
- eprintk("Unsupported resolution %dx%d\n",
+ if (var->xres > POW2(10) || var->yres >= POW2(10)) {
+ printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n",
var->xres, var->yres);
return -EINVAL;
}
- if (((var->hsync_len - 1) >= POW2(8))
- || ((hSyncOff-1) >= POW2(10))
- || ((var->left_margin - 2) >= POW2(8))
- || (vSyncOn >= POW2(12))
- || (vSyncOff >= POW2(12))
- || (vBackPorch >= POW2(8))
- || (tiles_in_X >= POW2(4))
- || (tiles_in_X <= 0)) {
- eprintk("Unsupported Timings\n");
+ if (var->hsync_len > POW2(8) || hSyncOff - 1 > POW2(10) ||
+ var->left_margin - 2 >= POW2(8) || vSyncOn >= POW2(12) ||
+ vSyncOff >= POW2(12) || vBackPorch >= POW2(8) ||
+ tiles_in_X >= POW2(4) || tiles_in_X <= 0) {
+ printk(KERN_ERR "sstfb: Unsupported timings\n");
return -EINVAL;
}
}
@@ -486,8 +471,8 @@
real_length = tiles_in_X * (IS_VOODOO2(par) ? 32 : 64 )
* ((var->bits_per_pixel == 16) ? 2 : 4);

- if ((real_length * yDim) > info->fix.smem_len) {
- eprintk("Not enough video memory\n");
+ if (real_length * yDim > info->fix.smem_len) {
+ printk(KERN_ERR "sstfb: Not enough video memory\n");
return -ENOMEM;
}

@@ -515,20 +500,6 @@
var->blue.offset = 0;
var->transp.offset = 0;
break;
-#ifdef EN_24_32_BPP
- case 24: /* RGB 888 LfbMode 4 */
- case 32: /* ARGB 8888 LfbMode 5 */
- var->red.length = 8;
- var->green.length = 8;
- var->blue.length = 8;
- var->transp.length = 0;
-
- var->red.offset = 16;
- var->green.offset = 8;
- var->blue.offset = 0;
- var->transp.offset = 0; /* in 24bpp we fake a 32 bpp mode */
- break;
-#endif
default:
return -EINVAL;
}
@@ -653,13 +624,6 @@
case 16:
fbiinit1 |= SEL_SOURCE_VCLK_2X_SEL;
break;
-#ifdef EN_24_32_BPP
- case 24:
- case 32:
- /* sst_set_bits(FBIINIT1, SEL_SOURCE_VCLK_2X_DIV2 | EN_24BPP);*/
- fbiinit1 |= SEL_SOURCE_VCLK_2X_SEL | EN_24BPP;
- break;
-#endif
default:
return -EINVAL;
}
@@ -690,14 +654,6 @@
case 16:
lfbmode = LFB_565;
break;
-#ifdef EN_24_32_BPP
- case 24:
- lfbmode = LFB_888;
- break;
- case 32:
- lfbmode = LFB_8888;
- break;
-#endif
default:
return -EINVAL;
}
@@ -789,8 +745,7 @@
return -EFAULT;
if (val > info->fix.smem_len)
val = info->fix.smem_len;
- printk("filling %#x \n", val);
- for (p=0 ; p<val; p+=2)
+ for (p = 0 ; p < val; p += 2)
writew(p >> 6, info->screen_base + p);
return 0;

@@ -802,13 +757,10 @@
pci_write_config_dword(sst_dev, PCI_INIT_ENABLE,
tmp | PCI_EN_INIT_WR );
fbiinit0 = sst_read (FBIINIT0);
- if (val) {
+ if (val)
sst_write(FBIINIT0, fbiinit0 & ~EN_VGA_PASSTHROUGH);
- iprintk("Disabling VGA pass-through\n");
- } else {
+ else
sst_write(FBIINIT0, fbiinit0 | EN_VGA_PASSTHROUGH);
- iprintk("Enabling VGA pass-through\n");
- }
pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, tmp);
return 0;

@@ -884,9 +836,9 @@
u8 __iomem *fbbase_virt = info->screen_base;

/* force memsize */
- if ((mem >= 1 ) && (mem <= 4)) {
+ if (mem >= 1 && mem <= 4) {
*memsize = (mem * 0x100000);
- iprintk("supplied memsize: %#x\n", *memsize);
+ printk(KERN_INFO "supplied memsize: %#x\n", *memsize);
return 1;
}

@@ -927,7 +879,7 @@
struct sstfb_par *par = info->par;
int i, mir, dir;

- for (i=0; i<3; i++) {
+ for (i = 0; i < 3; i++) {
sst_dac_write(DACREG_WMA, 0); /* backdoor */
sst_dac_read(DACREG_RMR); /* read 4 times RMR */
sst_dac_read(DACREG_RMR);
@@ -940,7 +892,7 @@
/*the 7th, device ID register */
dir = sst_dac_read(DACREG_RMR);
f_ddprintk("mir: %#x, dir: %#x\n", mir, dir);
- if ((mir == DACREG_MIR_ATT ) && (dir == DACREG_DIR_ATT)) {
+ if (mir == DACREG_MIR_ATT && dir == DACREG_DIR_ATT) {
return 1;
}
}
@@ -1134,12 +1086,6 @@
case 16:
sst_dac_write(DACREG_RMR, (cr0 & 0x0f) | DACREG_CR0_16BPP);
break;
-#ifdef EN_24_32_BPP
- case 24:
- case 32:
- sst_dac_write(DACREG_RMR, (cr0 & 0x0f) | DACREG_CR0_24BPP);
- break;
-#endif
default:
dprintk("%s: bad depth '%u'\n", __FUNCTION__, bpp);
break;
@@ -1154,12 +1100,6 @@
case 16:
sst_dac_write(DACREG_ICS_CMD, DACREG_ICS_CMD_16BPP);
break;
-#ifdef EN_24_32_BPP
- case 24:
- case 32:
- sst_dac_write(DACREG_ICS_CMD, DACREG_ICS_CMD_24BPP);
- break;
-#endif
default:
dprintk("%s: bad depth '%u'\n", __FUNCTION__, bpp);
break;
@@ -1250,7 +1190,7 @@
PCI_EN_INIT_WR | PCI_REMAP_DAC );
/* detect dac type */
if (!sst_detect_dactype(info, par)) {
- eprintk("Unknown dac type\n");
+ printk(KERN_ERR "sstfb: unknown dac type.\n");
//FIXME watch it: we are not in a safe state, bad bad bad.
return 0;
}
@@ -1258,10 +1198,10 @@
/* set graphic clock */
par->gfx_clock = spec->default_gfx_clock;
if ((gfxclk >10 ) && (gfxclk < spec->max_gfxclk)) {
- iprintk("Using supplied graphic freq : %dMHz\n", gfxclk);
+ printk(KERN_INFO "sstfb: Using supplied graphic freq : %dMHz\n", gfxclk);
par->gfx_clock = gfxclk *1000;
} else if (gfxclk) {
- wprintk ("%dMhz is way out of spec! Using default\n", gfxclk);
+ printk(KERN_WARNING "sstfb: %dMhz is way out of spec! Using default\n", gfxclk);
}

sst_calc_pll(par->gfx_clock, &Fout, &gfx_timings);
@@ -1396,7 +1336,7 @@

/* Enable device in PCI config. */
if ((err=pci_enable_device(pdev))) {
- eprintk("cannot enable device\n");
+ printk(KERN_ERR "cannot enable device\n");
return err;
}

@@ -1422,39 +1362,39 @@
fix->smem_start = fix->mmio_start + 0x400000;

if (!request_mem_region(fix->mmio_start, fix->mmio_len, "sstfb MMIO")) {
- eprintk("cannot reserve mmio memory\n");
+ printk(KERN_ERR "sstfb: cannot reserve mmio memory\n");
goto fail_mmio_mem;
}

if (!request_mem_region(fix->smem_start, 0x400000,"sstfb FB")) {
- eprintk("cannot reserve fb memory\n");
+ printk(KERN_ERR "sstfb: cannot reserve fb memory\n");
goto fail_fb_mem;
}

par->mmio_vbase = ioremap_nocache(fix->mmio_start,
fix->mmio_len);
if (!par->mmio_vbase) {
- eprintk("cannot remap register area %#lx\n",
+ printk(KERN_ERR "sstfb: cannot remap register area %#lx\n",
fix->mmio_start);
goto fail_mmio_remap;
}
info->screen_base = ioremap_nocache(fix->smem_start, 0x400000);
if (!info->screen_base) {
- eprintk("cannot remap framebuffer %#lx\n",
+ printk(KERN_ERR "sstfb: cannot remap framebuffer %#lx\n",
fix->smem_start);
goto fail_fb_remap;
}

if (!sst_init(info, par)) {
- eprintk("Init failed\n");
+ printk(KERN_ERR "sstfb: Init failed\n");
goto fail;
}
sst_get_memsize(info, &fix->smem_len);
strlcpy(fix->id, spec->name, sizeof(fix->id));

- iprintk("%s (revision %d) with %s dac\n",
+ printk(KERN_INFO "%s (revision %d) with %s dac\n",
fix->id, par->revision, par->dac_sw.name);
- iprintk("framebuffer at %#lx, mapped to 0x%p, size %dMB\n",
+ printk(KERN_INFO "framebuffer at %#lx, mapped to 0x%p, size %dMB\n",
fix->smem_start, info->screen_base,
fix->smem_len >> 20);

@@ -1471,24 +1411,25 @@
fix->accel = FB_ACCEL_NONE; /* FIXME */
/*
* According to the specs, the linelength must be of 1024 *pixels*
- * and the 24bpp mode is in fact a 32 bpp mode.
+ * and the 24bpp mode is in fact a 32 bpp mode (and both are in
+ * fact dithered to 16bit).
*/
fix->line_length = 2048; /* default value, for 24 or 32bit: 4096 */

if ( mode_option &&
fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16)) {
- eprintk("can't set supplied video mode. Using default\n");
+ printk(KERN_ERR "sstfb: can't set supplied video mode. Using default\n");
info->var = sstfb_default;
} else
info->var = sstfb_default;

if (sstfb_check_var(&info->var, info)) {
- eprintk("invalid default video mode.\n");
+ printk(KERN_ERR "sstfb: invalid default video mode.\n");
goto fail;
}

if (sstfb_set_par(info)) {
- eprintk("can't set default video mode.\n");
+ printk(KERN_ERR "sstfb: can't set default video mode.\n");
goto fail;
}

@@ -1497,7 +1438,7 @@
/* register fb */
info->device = &pdev->dev;
if (register_framebuffer(info) < 0) {
- eprintk("can't register framebuffer.\n");
+ printk(KERN_ERR "sstfb: can't register framebuffer.\n");
goto fail;
}

@@ -1711,4 +1652,3 @@
MODULE_PARM_DESC(gfxclk, "Force graphic chip frequency in MHz. DANGEROUS. (default=auto)");
module_param(slowpci, bool, 0);
MODULE_PARM_DESC(slowpci, "Uses slow PCI settings (0 or 1) (default=0)");
-
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.18-rc4-mm2/include/video/sstfb.h linux-2.6.18-rc4-mm2/include/video/sstfb.h
--- linux.vanilla-2.6.18-rc4-mm2/include/video/sstfb.h 2006-08-21 14:17:59.000000000 +0100
+++ linux-2.6.18-rc4-mm2/include/video/sstfb.h 2006-08-21 21:56:26.000000000 +0100
@@ -68,10 +68,6 @@
# define print_var(X,Y...)
#endif

-#define eprintk(X...) printk(KERN_ERR "sstfb: " X)
-#define iprintk(X...) printk(KERN_INFO "sstfb: " X)
-#define wprintk(X...) printk(KERN_WARNING "sstfb: " X)
-
#define BIT(x) (1ul<<(x))
#define POW2(x) (1ul<<(x))


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/