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drm/nouveau: Don't try to parse a GPIO table on early DCBv2.2 BIOSes.

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Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-09-22 23:25:00 +02:00 committed by Ben Skeggs
parent bb338bb6f2
commit 5e6a74436e
1 changed files with 14 additions and 1 deletions
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15
drivers/gpu/drm/nouveau/nouveau_bios.c
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@ -5809,7 +5809,7 @@ parse_dcb_gpio_table(struct nvbios *bios)
entries = gpio[2];
recordlen = gpio[3];
} else
if (dcb[0] >= 0x22) {
if (dcb[0] >= 0x22 && dcb[-1] >= 0x13) {
gpio = ROMPTR(bios, dcb[-15]);
if (!gpio)
goto no_table;
@ -5817,6 +5817,19 @@ parse_dcb_gpio_table(struct nvbios *bios)
headerlen = 3;
entries = gpio[2];
recordlen = gpio[1];
} else
if (dcb[0] >= 0x22) {
/* No GPIO table present, parse the TVDAC GPIO data. */
uint8_t *tvdac_gpio = &dcb[-5];
if (tvdac_gpio[0] & 1) {
e = new_gpio_entry(bios);
e->tag = DCB_GPIO_TVDAC0;
e->line = tvdac_gpio[1] >> 4;
e->invert = tvdac_gpio[0] & 2;
}
goto no_table;
} else {
NV_DEBUG(dev, "no/unknown gpio table on DCB 0x%02x\n", dcb[0]);
goto no_table;