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mpv/vidix/drivers/sis_bridge.c

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/**
Video bridge detection for SiS 300 and 310/325 series chips.
Copyright 2003 Jake Page, Sugar Media.
Based on SiS Xv driver:
Copyright 2002-2003 by Thomas Winischhofer, Vienna, Austria.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "../../libdha/libdha.h"
#include "sis_regs.h"
#include "sis_defs.h"
static void sis_ddc2_delay(unsigned short delaytime)
{
unsigned short i;
int temp;
for (i = 0; i < delaytime; i++) {
inSISIDXREG(SISSR, 0x05, temp);
}
}
static int sis_do_sense(int tempbl, int tempbh, int tempcl, int tempch)
{
int temp;
outSISIDXREG(SISPART4, 0x11, tempbl);
temp = tempbh | tempcl;
setSISIDXREG(SISPART4, 0x10, 0xe0, temp);
//usleep(200000);
sis_ddc2_delay(0x1000);
tempch &= 0x7f;
inSISIDXREG(SISPART4, 0x03, temp);
temp ^= 0x0e;
temp &= tempch;
return (temp == tempch);
}
/* sense connected devices on 30x bridge */
static void sis_sense_30x()
{
unsigned char backupP4_0d, backupP2_00, biosflag;
unsigned char testsvhs_tempbl, testsvhs_tempbh;
unsigned char testsvhs_tempcl, testsvhs_tempch;
unsigned char testcvbs_tempbl, testcvbs_tempbh;
unsigned char testcvbs_tempcl, testcvbs_tempch;
unsigned char testvga2_tempbl, testvga2_tempbh;
unsigned char testvga2_tempcl, testvga2_tempch;
int myflag, result = 0, i, j, haveresult;
unsigned short temp;
inSISIDXREG(SISPART4, 0x0d, backupP4_0d);
outSISIDXREG(SISPART4, 0x0d, (backupP4_0d | 0x04));
inSISIDXREG(SISPART2, 0x00, backupP2_00);
outSISIDXREG(SISPART2, 0x00, (backupP2_00 | 0x1c));
sis_do_sense(0, 0, 0, 0);
if ((sis_vga_engine == SIS_315_VGA) ||
(sis_device_id == DEVICE_SIS_300)) {
#if 0
if (0 /*pSiS->sishw_ext.UseROM */ ) {
if (sis_vga_engine == SIS_300_VGA)
temp = 0xfe;
else {
temp = 0xf3;
if (sis_device_id == DEVICE_SIS_330)
temp = 0x11b;
}
if (pSiS->BIOS[temp] & 0x08) {
if (sis_verbose > 1) {
printf
("[SiS] SiS30x: Video bridge has DVI-I TMDS/VGA combo connector\n");
}
orSISIDXREG(SISCR, 0x32, 0x80);
} else {
andSISIDXREG(SISCR, 0x32, 0x7f);
}
}
#endif
}
if (sis_vga_engine == SIS_300_VGA) {
if (0 /*pSiS->sishw_ext.UseROM */ ) {
#if 0
testvga2_tempbh = pSiS->BIOS[0xf9];
testvga2_tempbl = pSiS->BIOS[0xf8];
testsvhs_tempbh = pSiS->BIOS[0xfb];
testsvhs_tempbl = pSiS->BIOS[0xfa];
testcvbs_tempbh = pSiS->BIOS[0xfd];
testcvbs_tempbl = pSiS->BIOS[0xfc];
biosflag = pSiS->BIOS[0xfe];
#endif
} else {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0xd1;
testsvhs_tempbh = 0x00;
testsvhs_tempbl = 0xb9;
testcvbs_tempbh = 0x00;
testcvbs_tempbl = 0xb3;
biosflag = 0;
}
if (sis_vbflags & (VB_301B | VB_302B | VB_301LV | VB_302LV)) {
testvga2_tempbh = 0x01;
testvga2_tempbl = 0x90;
testsvhs_tempbh = 0x01;
testsvhs_tempbl = 0x6b;
testcvbs_tempbh = 0x01;
testcvbs_tempbl = 0x74;
}
inSISIDXREG(SISPART4, 0x01, myflag);
if (myflag & 0x04) {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0xfd;
testsvhs_tempbh = 0x00;
testsvhs_tempbl = 0xdd;
testcvbs_tempbh = 0x00;
testcvbs_tempbl = 0xee;
}
testvga2_tempch = 0x0e;
testvga2_tempcl = 0x08;
testsvhs_tempch = 0x06;
testsvhs_tempcl = 0x04;
testcvbs_tempch = 0x08;
testcvbs_tempcl = 0x04;
if (sis_device_id == DEVICE_SIS_300) {
inSISIDXREG(SISSR, 0x3b, myflag);
if (!(myflag & 0x01)) {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0x00;
testvga2_tempch = 0x00;
testvga2_tempcl = 0x00;
}
}
} else {
if (0 /*pSiS->sishw_ext.UseROM */ ) {
#if 0
if (sis_device_id == DEVICE_SIS_330) {
testvga2_tempbh = pSiS->BIOS[0xe6];
testvga2_tempbl = pSiS->BIOS[0xe5];
testsvhs_tempbh = pSiS->BIOS[0xe8];
testsvhs_tempbl = pSiS->BIOS[0xe7];
testcvbs_tempbh = pSiS->BIOS[0xea];
testcvbs_tempbl = pSiS->BIOS[0xe9];
biosflag = pSiS->BIOS[0x11b];
} else {
testvga2_tempbh = pSiS->BIOS[0xbe];
testvga2_tempbl = pSiS->BIOS[0xbd];
testsvhs_tempbh = pSiS->BIOS[0xc0];
testsvhs_tempbl = pSiS->BIOS[0xbf];
testcvbs_tempbh = pSiS->BIOS[0xc2];
testcvbs_tempbl = pSiS->BIOS[0xc1];
biosflag = pSiS->BIOS[0xf3];
}
#endif
} else {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0xd1;
testsvhs_tempbh = 0x00;
testsvhs_tempbl = 0xb9;
testcvbs_tempbh = 0x00;
testcvbs_tempbl = 0xb3;
biosflag = 0;
}
if (sis_vbflags & (VB_301B | VB_302B | VB_301LV | VB_302LV)) {
if (0 /*pSiS->sishw_ext.UseROM */ ) {
#if 0
if (sis_device_id == DEVICE_SIS_330) {
testvga2_tempbh = pSiS->BIOS[0xec];
testvga2_tempbl = pSiS->BIOS[0xeb];
testsvhs_tempbh = pSiS->BIOS[0xee];
testsvhs_tempbl = pSiS->BIOS[0xed];
testcvbs_tempbh = pSiS->BIOS[0xf0];
testcvbs_tempbl = pSiS->BIOS[0xef];
} else {
testvga2_tempbh = pSiS->BIOS[0xc4];
testvga2_tempbl = pSiS->BIOS[0xc3];
testsvhs_tempbh = pSiS->BIOS[0xc6];
testsvhs_tempbl = pSiS->BIOS[0xc5];
testcvbs_tempbh = pSiS->BIOS[0xc8];
testcvbs_tempbl = pSiS->BIOS[0xc7];
}
#endif
} else {
if (sis_vbflags & (VB_301B | VB_302B)) {
testvga2_tempbh = 0x01;
testvga2_tempbl = 0x90;
testsvhs_tempbh = 0x01;
testsvhs_tempbl = 0x6b;
testcvbs_tempbh = 0x01;
testcvbs_tempbl = 0x74;
} else {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0x00;
testsvhs_tempbh = 0x02;
testsvhs_tempbl = 0x00;
testcvbs_tempbh = 0x01;
testcvbs_tempbl = 0x00;
}
}
}
if (sis_vbflags & (VB_301 | VB_301B | VB_302B)) {
inSISIDXREG(SISPART4, 0x01, myflag);
if (myflag & 0x04) {
testvga2_tempbh = 0x00;
testvga2_tempbl = 0xfd;
testsvhs_tempbh = 0x00;
testsvhs_tempbl = 0xdd;
testcvbs_tempbh = 0x00;
testcvbs_tempbl = 0xee;
}
}
if (sis_vbflags & (VB_301LV | VB_302LV)) {
/* TW: No VGA2 or SCART on LV bridges */
testvga2_tempbh = 0x00;
testvga2_tempbl = 0x00;
testvga2_tempch = 0x00;
testvga2_tempcl = 0x00;
testsvhs_tempch = 0x04;
testsvhs_tempcl = 0x08;
testcvbs_tempch = 0x08;
testcvbs_tempcl = 0x08;
} else {
testvga2_tempch = 0x0e;
testvga2_tempcl = 0x08;
testsvhs_tempch = 0x06;
testsvhs_tempcl = 0x04;
testcvbs_tempch = 0x08;
testcvbs_tempcl = 0x04;
}
}
/* XXX: ?? andSISIDXREG(SISCR, 0x32, ~0x14); */
/* pSiS->postVBCR32 &= ~0x14; */
/* scan for VGA2/SCART */
if (testvga2_tempch || testvga2_tempcl ||
testvga2_tempbh || testvga2_tempbl) {
haveresult = 0;
for (j = 0; j < 10; j++) {
result = 0;
for (i = 0; i < 3; i++) {
if (sis_do_sense(testvga2_tempbl, testvga2_tempbh,
testvga2_tempcl, testvga2_tempch))
result++;
}
if ((result == 0) || (result >= 2))
break;
}
if (result) {
if (biosflag & 0x01) {
if (sis_verbose > 1) {
printf
("[SiS] SiS30x: Detected TV connected to SCART output\n");
}
sis_vbflags |= TV_SCART;
orSISIDXREG(SISCR, 0x32, 0x04);
/*pSiS->postVBCR32 |= 0x04; */
} else {
if (sis_verbose > 1) {
printf
("[SiS] SiS30x: Detected secondary VGA connection\n");
}
sis_vbflags |= VGA2_CONNECTED;
orSISIDXREG(SISCR, 0x32, 0x10);
/*pSiS->postVBCR32 |= 0x10; */
}
}
}
/* scanning for TV */
/* XXX: ?? andSISIDXREG(SISCR, 0x32, ~0x03); */
/* pSiS->postVBCR32 &= ~0x03; */
result = sis_do_sense(testsvhs_tempbl, testsvhs_tempbh,
testsvhs_tempcl, testsvhs_tempch);
haveresult = 0;
for (j = 0; j < 10; j++) {
result = 0;
for (i = 0; i < 3; i++) {
if (sis_do_sense(testsvhs_tempbl, testsvhs_tempbh,
testsvhs_tempcl, testsvhs_tempch))
result++;
}
if ((result == 0) || (result >= 2))
break;
}
if (result) {
if (sis_verbose > 1) {
printf
("[SiS] SiS30x: Detected TV connected to SVIDEO output\n");
}
/* TW: So we can be sure that there IS a SVIDEO output */
sis_vbflags |= TV_SVIDEO;
orSISIDXREG(SISCR, 0x32, 0x02);
//pSiS->postVBCR32 |= 0x02;
}
if ((biosflag & 0x02) || (!(result))) {
haveresult = 0;
for (j = 0; j < 10; j++) {
result = 0;
for (i = 0; i < 3; i++) {
if (sis_do_sense(testcvbs_tempbl, testcvbs_tempbh,
testcvbs_tempcl, testcvbs_tempch))
result++;
}
if ((result == 0) || (result >= 2))
break;
}
if (result) {
if (sis_verbose > 1) {
printf
("[SiS] SiS30x: Detected TV connected to COMPOSITE output\n");
}
sis_vbflags |= TV_AVIDEO;
orSISIDXREG(SISCR, 0x32, 0x01);
//pSiS->postVBCR32 |= 0x01;
}
}
sis_do_sense(0, 0, 0, 0);
outSISIDXREG(SISPART2, 0x00, backupP2_00);
outSISIDXREG(SISPART4, 0x0d, backupP4_0d);
}
static void sis_detect_crt1()
{
unsigned char CR32;
unsigned char CRT1Detected = 0;
unsigned char OtherDevices = 0;
if (!(sis_vbflags & VB_VIDEOBRIDGE)) {
sis_crt1_off = 0;
return;
}
inSISIDXREG(SISCR, 0x32, CR32);
if (CR32 & 0x20)
CRT1Detected = 1;
if (CR32 & 0x5F)
OtherDevices = 1;
if (sis_crt1_off == -1) {
if (!CRT1Detected) {
/* BIOS detected no CRT1. */
/* If other devices exist, switch it off */
if (OtherDevices)
sis_crt1_off = 1;
else
sis_crt1_off = 0;
} else {
/* BIOS detected CRT1, leave/switch it on */
sis_crt1_off = 0;
}
}
if (sis_verbose > 0) {
printf("[SiS] %sCRT1 connection detected\n",
sis_crt1_off ? "No " : "");
}
}
static void sis_detect_lcd()
{
unsigned char CR32, CR36, CR37;
if (!(sis_vbflags & VB_VIDEOBRIDGE)) {
return;
}
inSISIDXREG(SISCR, 0x32, CR32);
if (CR32 & 0x08)
sis_vbflags |= CRT2_LCD;
/* DDC detection of LCD - not supported yet */
/* Get other misc info about LCD - not supported */
}
static void sis_detect_tv()
{
unsigned char SR16, SR38, CR32, CR38 = 0, CR79;
int temp = 0;
if (!(sis_vbflags & VB_VIDEOBRIDGE))
return;
inSISIDXREG(SISCR, 0x32, CR32);
inSISIDXREG(SISSR, 0x16, SR16);
inSISIDXREG(SISSR, 0x38, SR38);
switch (sis_vga_engine) {
case SIS_300_VGA:
if (sis_device_id == DEVICE_SIS_630_VGA)
temp = 0x35;
break;
case SIS_315_VGA:
temp = 0x38;
break;
}
if (temp) {
inSISIDXREG(SISCR, temp, CR38);
}
if (CR32 & 0x47)
sis_vbflags |= CRT2_TV;
if (CR32 & 0x04)
sis_vbflags |= TV_SCART;
else if (CR32 & 0x02)
sis_vbflags |= TV_SVIDEO;
else if (CR32 & 0x01)
sis_vbflags |= TV_AVIDEO;
else if (CR32 & 0x40)
sis_vbflags |= (TV_SVIDEO | TV_HIVISION);
else if ((CR38 & 0x04) && (sis_vbflags & (VB_301LV | VB_302LV)))
sis_vbflags |= TV_HIVISION_LV;
else if ((CR38 & 0x04) && (sis_vbflags & VB_CHRONTEL))
sis_vbflags |= (TV_CHSCART | TV_PAL);
else if ((CR38 & 0x08) && (sis_vbflags & VB_CHRONTEL))
sis_vbflags |= (TV_CHHDTV | TV_NTSC);
if (sis_vbflags & (TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION)) {
if (sis_vga_engine == SIS_300_VGA) {
/* TW: Should be SR38 here as well, but this
* does not work. Looks like a BIOS bug (2.04.5c).
*/
if (SR16 & 0x20)
sis_vbflags |= TV_PAL;
else
sis_vbflags |= TV_NTSC;
} else if ((sis_device_id == DEVICE_SIS_550_VGA)) {
inSISIDXREG(SISCR, 0x79, CR79);
if (CR79 & 0x08) {
inSISIDXREG(SISCR, 0x79, CR79);
CR79 >>= 5;
}
if (CR79 & 0x01) {
sis_vbflags |= TV_PAL;
if (CR38 & 0x40)
sis_vbflags |= TV_PALM;
else if (CR38 & 0x80)
sis_vbflags |= TV_PALN;
} else
sis_vbflags |= TV_NTSC;
} else if ((sis_device_id == DEVICE_SIS_650_VGA)) {
inSISIDXREG(SISCR, 0x79, CR79);
if (CR79 & 0x20) {
sis_vbflags |= TV_PAL;
if (CR38 & 0x40)
sis_vbflags |= TV_PALM;
else if (CR38 & 0x80)
sis_vbflags |= TV_PALN;
} else
sis_vbflags |= TV_NTSC;
} else { /* 315, 330 */
if (SR38 & 0x01) {
sis_vbflags |= TV_PAL;
if (CR38 & 0x40)
sis_vbflags |= TV_PALM;
else if (CR38 & 0x80)
sis_vbflags |= TV_PALN;
} else
sis_vbflags |= TV_NTSC;
}
}
if (sis_vbflags &
(TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION | TV_CHSCART |
TV_CHHDTV)) {
if (sis_verbose > 0) {
printf("[SiS] %sTV standard %s\n",
(sis_vbflags & (TV_CHSCART | TV_CHHDTV)) ? "Using " :
"Detected default ",
(sis_vbflags & TV_NTSC) ? ((sis_vbflags & TV_CHHDTV) ?
"480i HDTV" : "NTSC")
: ((sis_vbflags & TV_PALM) ? "PALM"
: ((sis_vbflags & TV_PALN) ? "PALN" : "PAL")));
}
}
}
static void sis_detect_crt2()
{
unsigned char CR32;
if (!(sis_vbflags & VB_VIDEOBRIDGE))
return;
/* CRT2-VGA not supported on LVDS and 30xLV */
if (sis_vbflags & (VB_LVDS | VB_301LV | VB_302LV))
return;
inSISIDXREG(SISCR, 0x32, CR32);
if (CR32 & 0x10)
sis_vbflags |= CRT2_VGA;
#if 0
if (!(pSiS->nocrt2ddcdetection)) {
if (sis_vbflags & (VB_301B | VB_302B)) {
if (!(sis_vbflags & (CRT2_VGA | CRT2_LCD))) {
printf
("[SiS] BIOS detected no secondary VGA, sensing via DDC\n");
if (SiS_SenseVGA2DDC(pSiS->SiS_Pr, pSiS)) {
printf
("[SiS] DDC error during secondary VGA detection\n");
} else {
inSISIDXREG(SISCR, 0x32, CR32);
if (CR32 & 0x10) {
sis_vbflags |= CRT2_VGA;
/*pSiS->postVBCR32 |= 0x10; */
printf
("[SiS] Detected secondary VGA connection\n");
} else {
printf
("[SiS] No secondary VGA connection detected\n");
}
}
}
}
}
#endif
}
/* Preinit: detect video bridge and sense connected devs */
static void sis_detect_video_bridge()
{
int temp, temp1, temp2;
sis_vbflags = 0;
if (sis_vga_engine != SIS_300_VGA && sis_vga_engine != SIS_315_VGA)
return;
inSISIDXREG(SISPART4, 0x00, temp);
temp &= 0x0F;
if (temp == 1) {
inSISIDXREG(SISPART4, 0x01, temp1);
temp1 &= 0xff;
if (temp1 >= 0xE0) {
sis_vbflags |= VB_302LV;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS302LV video bridge (ID 1; Revision 0x%x)\n",
temp1);
}
} else if (temp1 >= 0xD0) {
sis_vbflags |= VB_301LV;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS301LV video bridge (ID 1; Revision 0x%x)\n",
temp1);
}
} else if (temp1 >= 0xB0) {
sis_vbflags |= VB_301B;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_301B;
inSISIDXREG(SISPART4, 0x23, temp2);
if (!(temp2 & 0x02))
sis_vbflags |= VB_30xBDH;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS301B%s video bridge (Revision 0x%x)\n",
(temp2 & 0x02) ? "" : " (DH)", temp1);
}
} else {
sis_vbflags |= VB_301;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_301;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS301 video bridge (Revision 0x%x)\n",
temp1);
}
}
sis_sense_30x();
} else if (temp == 2) {
inSISIDXREG(SISPART4, 0x01, temp1);
temp1 &= 0xff;
if (temp1 >= 0xE0) {
sis_vbflags |= VB_302LV;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS302LV video bridge (ID 2; Revision 0x%x)\n",
temp1);
}
} else if (temp1 >= 0xD0) {
sis_vbflags |= VB_301LV;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS301LV video bridge (ID 2; Revision 0x%x)\n",
temp1);
}
} else {
sis_vbflags |= VB_302B;
//pSiS->sishw_ext.ujVBChipID = VB_CHIP_302B;
inSISIDXREG(SISPART4, 0x23, temp2);
if (!(temp & 0x02))
sis_vbflags |= VB_30xBDH;
if (sis_verbose > 1) {
printf
("[SiS] Detected SiS302B%s video bridge (Revision 0x%x)\n",
(temp2 & 0x02) ? "" : " (DH)", temp1);
}
}
sis_sense_30x();
} else if (temp == 3) {
if (sis_verbose > 1) {
printf("[SiS] Detected SiS303 video bridge - not supported\n");
}
} else {
/* big scary mess of code to handle unknown or Chrontel LVDS */
/* skipping it for now */
if (sis_verbose > 1) {
printf
("[SiS] Detected Chrontel video bridge - not supported\n");
}
}
/* this is probably not relevant to video overlay driver... */
/* detects if brdige uses LCDA for low res text modes */
if (sis_vga_engine == SIS_315_VGA) {
if (sis_vbflags & (VB_302B | VB_301LV | VB_302LV)) {
#if 0
if (pSiS->sisfblcda != 0xff) {
if ((pSiS->sisfblcda & 0x03) == 0x03) {
//pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
sis_vbflags |= VB_USELCDA;
}
} else
#endif
{
inSISIDXREG(SISCR, 0x34, temp);
if (temp <= 0x13) {
inSISIDXREG(SISCR, 0x38, temp);
if ((temp & 0x03) == 0x03) {
//pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
sis_vbflags |= VB_USELCDA;
} else {
inSISIDXREG(SISCR, 0x30, temp);
if (temp & 0x20) {
inSISIDXREG(SISPART1, 0x13, temp);
if (temp & 0x40) {
//pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
sis_vbflags |= VB_USELCDA;
}
}
}
}
}
if (sis_vbflags & VB_USELCDA) {
/* printf("Bridge uses LCDA for low resolution and text modes\n"); */
}
}
}
}
/* detect video bridge type and sense connected devices */
void sis_init_video_bridge()
{
sis_detect_video_bridge();
sis_detect_crt1();
//sis_detect_lcd();
sis_detect_tv();
sis_detect_crt2();
sis_detected_crt2_devices =
sis_vbflags & (CRT2_LCD | CRT2_TV | CRT2_VGA);
// force crt2 type
if (sis_force_crt2_type == CRT2_DEFAULT) {
if (sis_vbflags & CRT2_VGA)
sis_force_crt2_type = CRT2_VGA;
else if (sis_vbflags & CRT2_LCD)
sis_force_crt2_type = CRT2_LCD;
else if (sis_vbflags & CRT2_TV)
sis_force_crt2_type = CRT2_TV;
}
switch (sis_force_crt2_type) {
case CRT2_TV:
sis_vbflags = sis_vbflags & ~(CRT2_LCD | CRT2_VGA);
if (sis_vbflags & VB_VIDEOBRIDGE)
sis_vbflags = sis_vbflags | CRT2_TV;
else
sis_vbflags = sis_vbflags & ~(CRT2_TV);
break;
case CRT2_LCD:
sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_VGA);
if ((sis_vbflags & VB_VIDEOBRIDGE) /* XXX: && (pSiS->VBLCDFlags) */
)
sis_vbflags = sis_vbflags | CRT2_LCD;
else {
sis_vbflags = sis_vbflags & ~(CRT2_LCD);
if (sis_verbose > 0) {
printf
("[SiS] Can't force CRT2 to LCD, no panel detected\n");
}
}
break;
case CRT2_VGA:
if (sis_vbflags & VB_LVDS) {
if (sis_verbose > 0) {
printf("[SiS] LVDS does not support secondary VGA\n");
}
break;
}
if (sis_vbflags & (VB_301LV | VB_302LV)) {
if (sis_verbose > 0) {
printf
("[SiS] SiS30xLV bridge does not support secondary VGA\n");
}
break;
}
sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_LCD);
if (sis_vbflags & VB_VIDEOBRIDGE)
sis_vbflags = sis_vbflags | CRT2_VGA;
else
sis_vbflags = sis_vbflags & ~(CRT2_VGA);
break;
default:
sis_vbflags &= ~(CRT2_TV | CRT2_LCD | CRT2_VGA);
}
/* CRT2 gamma correction?? */
/* other force modes: */
/* have a 'force tv type' (svideo, composite, scart) option? */
/* have a 'force crt1 type' (to turn it off, etc??) */
/* TW: Check if CRT1 used (or needed; this eg. if no CRT2 detected) */
if (sis_vbflags & VB_VIDEOBRIDGE) {
/* TW: No CRT2 output? Then we NEED CRT1!
* We also need CRT1 if depth = 8 and bridge=LVDS|630+301B
*/
if ((!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV))) || ( /*(pScrn->bitsPerPixel == 8) && */
((sis_vbflags & (VB_LVDS | VB_CHRONTEL)) || ((sis_vga_engine == SIS_300_VGA) && (sis_vbflags & VB_301B))))) {
sis_crt1_off = 0;
}
/* TW: No CRT2 output? Then we can't use hw overlay on CRT2 */
if (!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV)))
sis_overlay_on_crt1 = 1;
} else { /* TW: no video bridge? */
/* Then we NEED CRT1... */
sis_crt1_off = 0;
/* ... and can't use CRT2 for overlay output */
sis_overlay_on_crt1 = 1;
}
/* tvstandard options ? */
// determine using CRT1 or CRT2?
/* -> NO dualhead right now... */
if (sis_vbflags & DISPTYPE_DISP2) {
if (sis_crt1_off) {
sis_vbflags |= VB_DISPMODE_SINGLE;
/* TW: No CRT1? Then we use the video overlay on CRT2 */
sis_overlay_on_crt1 = 0;
} else /* TW: CRT1 and CRT2 - mirror or dual head ----- */
sis_vbflags |= (VB_DISPMODE_MIRROR | DISPTYPE_CRT1);
} else { /* TW: CRT1 only ------------------------------- */
sis_vbflags |= (VB_DISPMODE_SINGLE | DISPTYPE_CRT1);
}
if (sis_verbose > 0) {
printf("[SiS] Using hardware overlay on CRT%d\n",
sis_overlay_on_crt1 ? 1 : 2);
}
}
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