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viafb: add function to change sync polarity per device

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At the moment only the sync polarity for CRT is handled but there are
also bits for controlling the sync polarity for other output devices.
Add a function to change those similar to the other output device
functions.
There is no runtime change yet as the code still handles only CRT.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
This commit is contained in:
Florian Tobias Schandinat 2010-09-18 23:47:28 +00:00
parent e029ab0d02
commit 7f0e153e2c
2 changed files with 26 additions and 3 deletions
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24
drivers/video/via/hw.c
View file

@ -1151,6 +1151,24 @@ void via_set_state(u32 devices, u8 state)
set_lvds2_state(state);
}
void via_set_sync_polarity(u32 devices, u8 polarity)
{
if (polarity & ~(VIA_HSYNC_NEGATIVE | VIA_VSYNC_NEGATIVE)) {
printk(KERN_WARNING "viafb: Unsupported polarity: %d\n",
polarity);
return;
}
if (devices & VIA_CRT)
via_write_misc_reg_mask(polarity << 6, 0xC0);
if (devices & VIA_DVP1)
via_write_reg_mask(VIACR, 0x9B, polarity << 5, 0x60);
if (devices & VIA_LVDS1)
via_write_reg_mask(VIACR, 0x99, polarity << 5, 0x60);
if (devices & VIA_LVDS2)
via_write_reg_mask(VIACR, 0x97, polarity << 5, 0x60);
}
u32 via_parse_odev(char *input, char **end)
{
char *ptr = input;
@ -2026,10 +2044,10 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
/* update polarity for CRT timing */
if (crt_table[index].h_sync_polarity == NEGATIVE)
polarity |= BIT6;
polarity |= VIA_HSYNC_NEGATIVE;
if (crt_table[index].v_sync_polarity == NEGATIVE)
polarity |= BIT7;
via_write_misc_reg_mask(polarity, BIT6 | BIT7);
polarity |= VIA_VSYNC_NEGATIVE;
via_set_sync_polarity(VIA_CRT, polarity);
if (set_iga == IGA1) {
viafb_unlock_crt();

5
drivers/video/via/hw.h
View file

@ -47,6 +47,10 @@
#define VIA_STATE_SUSPEND 2
#define VIA_STATE_OFF 3
/* VIA output device sync polarity */
#define VIA_HSYNC_NEGATIVE 0x01
#define VIA_VSYNC_NEGATIVE 0x02
/***************************************************
* Definition IGA1 Design Method of CRTC Registers *
****************************************************/
@ -912,6 +916,7 @@ void viafb_load_reg(int timing_value, int viafb_load_reg_num,
int io_type);
void via_set_source(u32 devices, u8 iga);
void via_set_state(u32 devices, u8 state);
void via_set_sync_polarity(u32 devices, u8 polarity);
u32 via_parse_odev(char *input, char **end);
void via_odev_to_seq(struct seq_file *m, u32 odev);
void init_ad9389(void);