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viafb: set sync polarity for all output devices 

This patch sets the sync polarity for all output devices, not only CRT.
This may give some people a working screen but only if lcd scaling and
centering are not used as it is currently too dificult to propagate a
different resolution (from what the application thinks) to the correct
output device. Hopefully this does not introduce regressions as the
polarity of non-CRT devices was completly ignored before.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
This commit is contained in:
Florian Tobias Schandinat 2010-09-19 01:20:19 +00:00
parent 7f0e153e2c
commit 2e1abbdd1d
1 changed files with 25 additions and 9 deletions
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34
drivers/video/via/hw.c
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@ -2014,7 +2014,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
int index = 0;
int h_addr, v_addr;
u32 pll_D_N;
u8 polarity = 0;
for (i = 0; i < video_mode->mode_array; i++) {
index = i;
@ -2041,14 +2040,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
h_addr = crt_reg.hor_addr;
v_addr = crt_reg.ver_addr;
/* update polarity for CRT timing */
if (crt_table[index].h_sync_polarity == NEGATIVE)
polarity |= VIA_HSYNC_NEGATIVE;
if (crt_table[index].v_sync_polarity == NEGATIVE)
polarity |= VIA_VSYNC_NEGATIVE;
via_set_sync_polarity(VIA_CRT, polarity);
if (set_iga == IGA1) {
viafb_unlock_crt();
viafb_write_reg(CR09, VIACR, 0x00); /*initial CR09=0 */
@ -2352,6 +2343,17 @@ static void set_display_channel(void)
}
}
static u8 get_sync(struct fb_info *info)
{
u8 polarity = 0;
if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
polarity |= VIA_HSYNC_NEGATIVE;
if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
polarity |= VIA_VSYNC_NEGATIVE;
return polarity;
}
int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
struct VideoModeTable *vmode_tbl1, int video_bpp1)
{
@ -2566,6 +2568,15 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
viafb_DeviceStatus = CRT_Device;
}
device_on();
if (!viafb_dual_fb)
via_set_sync_polarity(devices, get_sync(viafbinfo));
else {
via_set_sync_polarity(viaparinfo->shared->iga1_devices,
get_sync(viafbinfo));
via_set_sync_polarity(viaparinfo->shared->iga2_devices,
get_sync(viafbinfo1));
}
via_set_state(devices, VIA_STATE_ON);
device_screen_on();
return 1;
@ -2719,4 +2730,9 @@ void viafb_fill_var_timing_info(struct fb_var_screeninfo *var, int refresh,
crt_reg.ver_total - (crt_reg.ver_sync_start + crt_reg.ver_sync_end);
var->lower_margin = crt_reg.ver_sync_start - crt_reg.ver_addr;
var->vsync_len = crt_reg.ver_sync_end;
var->sync = 0;
if (crt_timing[index].h_sync_polarity == POSITIVE)
var->sync |= FB_SYNC_HOR_HIGH_ACT;
if (crt_timing[index].v_sync_polarity == POSITIVE)
var->sync |= FB_SYNC_VERT_HIGH_ACT;
}