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sisfb: add subroutine for detecting XGI Z9

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Z7 and Z9 have the same PCI ID, so additional checking is needed to
detect Z9. The method was "documented" in XGI's xgifb driver.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Aaro Koskinen 2011-02-13 22:11:25 +00:00 committed by Paul Mundt
parent 74de5f4e52
commit 929c972e95
3 changed files with 20 additions and 0 deletions
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1
drivers/video/sis/sis.h
View File

@ -495,6 +495,7 @@ struct sis_video_info {
unsigned int refresh_rate;
unsigned int chip;
unsigned int chip_real_id;
u8 revision_id;
int sisvga_enabled; /* PCI device was enabled */

18
drivers/video/sis/sis_main.c
View File

@ -4563,6 +4563,11 @@ sisfb_post_sis315330(struct pci_dev *pdev)
}
#endif
static inline int sisfb_xgi_is21(struct sis_video_info *ivideo)
{
return ivideo->chip_real_id == XGI_21;
}
static void __devinit
sisfb_post_xgi_delay(struct sis_video_info *ivideo, int delay)
{
@ -5802,6 +5807,7 @@ sisfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
#endif
ivideo->chip = chipinfo->chip;
ivideo->chip_real_id = chipinfo->chip;
ivideo->sisvga_engine = chipinfo->vgaengine;
ivideo->hwcursor_size = chipinfo->hwcursor_size;
ivideo->CRT2_write_enable = chipinfo->CRT2_write_enable;
@ -6035,6 +6041,18 @@ sisfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
sisfb_detect_custom_timing(ivideo);
}
#ifdef CONFIG_FB_SIS_315
if (ivideo->chip == XGI_20) {
/* Check if our Z7 chip is actually Z9 */
SiS_SetRegOR(SISCR, 0x4a, 0x40); /* GPIOG EN */
reg = SiS_GetReg(SISCR, 0x48);
if (reg & 0x02) { /* GPIOG */
ivideo->chip_real_id = XGI_21;
dev_info(&pdev->dev, "Z9 detected\n");
}
}
#endif
/* POST card in case this has not been done by the BIOS */
if( (!ivideo->sisvga_enabled)
#if !defined(__i386__) && !defined(__x86_64__)

1
drivers/video/sis/vgatypes.h
View File

@ -87,6 +87,7 @@ typedef enum _SIS_CHIP_TYPE {
SIS_341,
SIS_342,
XGI_20 = 75,
XGI_21,
XGI_40,
MAX_SIS_CHIP
} SIS_CHIP_TYPE;