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Cleanup hidden DAC part.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-05-16 20:44:44 +02:00
parent d00b0b3f4d
commit 63c1b71cbb
1 changed files with 18 additions and 2 deletions
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20
video/cirrus.c
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@ -121,6 +121,15 @@ enum
#define CIRRUS_SR_EXTENDED_MODE_16BPP 0x06
#define CIRRUS_SR_EXTENDED_MODE_32BPP 0x08
#define CIRRUS_HIDDEN_DAC_ENABLE_EXT 0x80
#define CIRRUS_HIDDEN_DAC_ENABLE_ALL 0x40
#define CIRRUS_HIDDEN_DAC_15BPP (CIRRUS_HIDDEN_DAC_ENABLE_EXT \
| CIRRUS_HIDDEN_DAC_ENABLE_ALL | 0)
#define CIRRUS_HIDDEN_DAC_16BPP (CIRRUS_HIDDEN_DAC_ENABLE_EXT \
| CIRRUS_HIDDEN_DAC_ENABLE_ALL | 1)
#define CIRRUS_HIDDEN_DAC_888COLOR (CIRRUS_HIDDEN_DAC_ENABLE_EXT \
| CIRRUS_HIDDEN_DAC_ENABLE_ALL | 5)
static void
gr_write (grub_uint8_t val, grub_uint8_t addr)
{
@ -377,7 +386,7 @@ grub_video_cirrus_setup (unsigned int width, unsigned int height,
{
int pitch_reg, overflow_reg = 0, line_compare = 0x3ff;
grub_uint8_t sr_ext = 0;
grub_uint8_t sr_ext = 0, hidden_dac = 0;
pitch_reg = pitch / CIRRUS_WIDTH_DIVISOR;
@ -422,19 +431,26 @@ grub_video_cirrus_setup (unsigned int width, unsigned int height,
| CIRRUS_SR_EXTENDED_MODE_ENABLE_EXT;
switch (depth)
{
/* FIXME: support 8-bit grayscale and 8-bit RGB. */
case 32:
hidden_dac = CIRRUS_HIDDEN_DAC_888COLOR;
sr_ext |= CIRRUS_SR_EXTENDED_MODE_32BPP;
break;
case 24:
hidden_dac = CIRRUS_HIDDEN_DAC_888COLOR;
sr_ext |= CIRRUS_SR_EXTENDED_MODE_24BPP;
break;
case 16:
hidden_dac = CIRRUS_HIDDEN_DAC_16BPP;
sr_ext |= CIRRUS_SR_EXTENDED_MODE_16BPP;
break;
case 15:
hidden_dac = CIRRUS_HIDDEN_DAC_15BPP;
sr_ext |= CIRRUS_SR_EXTENDED_MODE_16BPP;
break;
}
sr_write (sr_ext, CIRRUS_SR_EXTENDED_MODE);
write_hidden_dac (depth == 16);
write_hidden_dac (hidden_dac);
}
/* Fill mode info details. */