drm/nouveau: Don't try to parse a GPIO table on early DCBv2.2 BIOSes. (5e6a7443) · Commits · 戴 / test

drivers/gpu/drm/nouveau/nouveau_bios.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -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;