diff options
| author | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2010-03-10 15:21:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:34 -0800 |
| commit | 415559fbf2353f4271a4cd6e11259b8bbc97cc33 (patch) | |
| tree | 4bcece3887bfc489d096f60ae28a688a31abe6fd /drivers/video/via/hw.c | |
| parent | dbb7884be758ca9ac5ec84cbe7eb21f21bce9d8f (diff) | |
| download | linux-415559fbf2353f4271a4cd6e11259b8bbc97cc33.tar.bz2 | |
viafb: rework color setting
This is a rewritten version of viafb_setcolreg. The hardware register
writes were split up and moved to hw.c where they belong as this is really
low level stuff. It was made dual fb aware.
Furthermore viafb_setcmap was removed as the problem with 8bpp originated
from a bug in writing multiple color registers at once. The removal of
viafb_setcmap might introduce a small performance regression but its
certainly better to receive the correct result a bit slower than a garbled
picture fast. It should give us a working 8bpp mode and is more
extensible than the old hardcoded code. No other regressions are expected
but as the hardware might be a bit picky it might cause some regressions
in 8bpp mode on some hardware although I doubt that.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/via/hw.c')
| -rw-r--r-- | drivers/video/via/hw.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c index 47d9024d7c30..1823253a6f40 100644 --- a/drivers/video/via/hw.c +++ b/drivers/video/via/hw.c @@ -691,7 +691,7 @@ void viafb_set_primary_color_depth(u8 depth) DEBUG_MSG(KERN_DEBUG "viafb_set_primary_color_depth(%d)\n", depth); switch (depth) { - case 6: + case 8: value = 0x00; break; case 16: @@ -715,7 +715,7 @@ void viafb_set_secondary_color_depth(u8 depth) DEBUG_MSG(KERN_DEBUG "viafb_set_secondary_color_depth(%d)\n", depth); switch (depth) { - case 6: + case 8: value = 0x00; break; case 16: @@ -733,6 +733,27 @@ void viafb_set_secondary_color_depth(u8 depth) viafb_write_reg_mask(0x67, VIACR, value, 0xC0); } +static void set_color_register(u8 index, u8 red, u8 green, u8 blue) +{ + outb(0xFF, 0x3C6); /* bit mask of palette */ + outb(index, 0x3C8); + outb(red, 0x3C9); + outb(green, 0x3C9); + outb(blue, 0x3C9); +} + +void viafb_set_primary_color_register(u8 index, u8 red, u8 green, u8 blue) +{ + viafb_write_reg_mask(0x1A, VIASR, 0x00, 0x01); + set_color_register(index, red, green, blue); +} + +void viafb_set_secondary_color_register(u8 index, u8 red, u8 green, u8 blue) +{ + viafb_write_reg_mask(0x1A, VIASR, 0x01, 0x01); + set_color_register(index, red, green, blue); +} + void viafb_set_output_path(int device, int set_iga, int output_interface) { switch (device) { @@ -2210,8 +2231,7 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp, outb(VPIT.SR[i - 1], VIASR + 1); } - viafb_write_reg_mask(0x15, VIASR, viafbinfo->fix.visual - == FB_VISUAL_PSEUDOCOLOR ? 0x22 : 0xA2, 0xA2); + viafb_write_reg_mask(0x15, VIASR, 0xA2, 0xA2); viafb_set_iga_path(); /* Write CRTC */ |