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viafb: Retain GEMODE reserved bits

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Commit c3e2567384 (viafb: 2D engine rewrite)
changed the setting of the GEMODE register so that the reserved bits are no
longer preserved.  Fix that; at the same time, move this code to its own
function and restore the use of symbolic constants.

Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2010-03-27 12:14:52 -06:00
parent 1b1f8cd299
commit 9ca43cf41d
1 changed files with 33 additions and 16 deletions
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49
drivers/video/via/accel.c
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@ -165,12 +165,42 @@ static int hw_bitblt_1(void __iomem *engine, u8 op, u32 width, u32 height,
return 0;
}
/*
* Figure out an appropriate bytes-per-pixel setting.
*/
static int viafb_set_bpp(void __iomem *engine, u8 bpp)
{
u32 gemode;
/* Preserve the reserved bits */
/* Lowest 2 bits to zero gives us no rotation */
gemode = readl(engine + VIA_REG_GEMODE) & 0xfffffcfc;
switch (bpp) {
case 8:
gemode |= VIA_GEM_8bpp;
break;
case 16:
gemode |= VIA_GEM_16bpp;
break;
case 32:
gemode |= VIA_GEM_32bpp;
break;
default:
printk(KERN_WARNING "hw_bitblt_2: Unsupported bpp %d\n", bpp);
return -EINVAL;
}
writel(gemode, engine + VIA_REG_GEMODE);
return 0;
}
static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
u32 fg_color, u32 bg_color, u8 fill_rop)
{
u32 ge_cmd = 0, tmp, i;
int ret;
if (!op || op > 3) {
printk(KERN_WARNING "hw_bitblt_2: Invalid operation: %d\n", op);
@ -204,22 +234,9 @@ static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
}
}
switch (dst_bpp) {
case 8:
tmp = 0x00000000;
break;
case 16:
tmp = 0x00000100;
break;
case 32:
tmp = 0x00000300;
break;
default:
printk(KERN_WARNING "hw_bitblt_2: Unsupported bpp %d\n",
dst_bpp);
return -EINVAL;
}
writel(tmp, engine + 0x04);
ret = viafb_set_bpp(engine, dst_bpp);
if (ret)
return ret;
if (op == VIA_BITBLT_FILL)
tmp = 0;