diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2010-03-27 12:14:52 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2010-04-20 14:23:19 -0600 |
| commit | 9ca43cf41d014e12f4b25d4538f362d7513448dd (patch) | |
| tree | 9c564608e9fac98c2babbd9db290364b107a0e67 /drivers/video | |
| parent | 1b1f8cd299d3c5a90c2ec1c24c271a0b536e5891 (diff) | |
| download | linux-9ca43cf41d014e12f4b25d4538f362d7513448dd.tar.gz | |
viafb: Retain GEMODE reserved bits
Commit c3e25673843153ea75fda79a47cf12f10a25ca37 (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>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/via/accel.c | 49 |
1 files changed, 33 insertions, 16 deletions
diff --git a/drivers/video/via/accel.c b/drivers/video/via/accel.c index d5077dfa9e00..a52147cf7f09 100644 --- a/drivers/video/via/accel.c +++ b/drivers/video/via/accel.c @@ -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; |