Commit 6b5a81a2 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nouveau/bios: start refactoring dcb routines 



This primary reason for this was mostly to avoid duplication of some of
this stuff by the MXM-SIS parser.  However, some other cleanups will also
follow this as a result.

Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 0f8067c7

drivers/gpu/drm/nouveau/nouveau_bios.c

+149 −121
Original line number Diff line number Diff line
@@ -6048,6 +6048,109 @@ parse_dcb_connector_table(struct nvbios *bios) 
	}

}



void *

dcb_table(struct drm_device *dev)

{

	struct drm_nouveau_private *dev_priv = dev->dev_private;

	u8 *dcb = NULL;



	if (dev_priv->card_type > NV_04)

		dcb = ROMPTR(dev, dev_priv->vbios.data[0x36]);

	if (!dcb) {

		NV_WARNONCE(dev, "No DCB data found in VBIOS\n");

		return NULL;

	}



	if (dcb[0] >= 0x41) {

		NV_WARNONCE(dev, "DCB version 0x%02x unknown\n", dcb[0]);

		return NULL;

	} else

	if (dcb[0] >= 0x30) {

		if (ROM32(dcb[6]) == 0x4edcbdcb)

			return dcb;

	} else

	if (dcb[0] >= 0x20) {

		if (ROM32(dcb[4]) == 0x4edcbdcb)

			return dcb;

	} else

	if (dcb[0] >= 0x15) {

		if (!memcmp(&dcb[-7], "DEV_REC", 7))

			return dcb;

	} else {

		/*

		 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but

		 * always has the same single (crt) entry, even when tv-out

		 * present, so the conclusion is this version cannot really

		 * be used.

		 *

		 * v1.2 tables (some NV6/10, and NV15+) normally have the

		 * same 5 entries, which are not specific to the card and so

		 * no use.

		 *

		 * v1.2 does have an I2C table that read_dcb_i2c_table can

		 * handle, but cards exist (nv11 in #14821) with a bad i2c

		 * table pointer, so use the indices parsed in

		 * parse_bmp_structure.

		 *

		 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful

		 */

		NV_WARNONCE(dev, "No useful DCB data in VBIOS\n");

		return NULL;

	}



	NV_WARNONCE(dev, "DCB header validation failed\n");

	return NULL;

}



u8 *

dcb_outp(struct drm_device *dev, u8 idx)

{

	u8 *dcb = dcb_table(dev);

	if (dcb && dcb[0] >= 0x30) {

		if (idx < dcb[2])

			return dcb + dcb[1] + (idx * dcb[3]);

	} else

	if (dcb && dcb[0] >= 0x20) {

		u8 *i2c = ROMPTR(dev, dcb[2]);

		u8 *ent = dcb + 8 + (idx * 8);

		if (i2c && ent < i2c)

			return ent;

	} else

	if (dcb && dcb[0] >= 0x15) {

		u8 *i2c = ROMPTR(dev, dcb[2]);

		u8 *ent = dcb + 4 + (idx * 10);

		if (i2c && ent < i2c)

			return ent;

	}



	return NULL;

}



int

dcb_outp_foreach(struct drm_device *dev, void *data,

		 int (*exec)(struct drm_device *, void *, int idx, u8 *outp))

{

	int ret, idx = -1;

	u8 *outp = NULL;

	while ((outp = dcb_outp(dev, ++idx))) {

		if (ROM32(outp[0]) == 0x00000000)

			break; /* seen on an NV11 with DCB v1.5 */

		if (ROM32(outp[0]) == 0xffffffff)

			break; /* seen on an NV17 with DCB v2.0 */



		if ((outp[0] & 0x0f) == OUTPUT_UNUSED)

			continue;

		if ((outp[0] & 0x0f) == OUTPUT_EOL)

			break;



		ret = exec(dev, data, idx, outp);

		if (ret)

			return ret;

	}



	return 0;

}



static struct dcb_entry *new_dcb_entry(struct dcb_table *dcb)

{

	struct dcb_entry *entry = &dcb->entry[dcb->entries];
@@ -6251,25 +6354,6 @@ parse_dcb15_entry(struct drm_device *dev, struct dcb_table *dcb, 
	return true;

}



static bool parse_dcb_entry(struct drm_device *dev, struct dcb_table *dcb,

			    uint32_t conn, uint32_t conf)

{

	struct dcb_entry *entry = new_dcb_entry(dcb);

	bool ret;



	if (dcb->version >= 0x20)

		ret = parse_dcb20_entry(dev, dcb, conn, conf, entry);

	else

		ret = parse_dcb15_entry(dev, dcb, conn, conf, entry);

	if (!ret)

		return ret;



	read_dcb_i2c_entry(dev, dcb->version, dcb->i2c_table,

			   entry->i2c_index, &dcb->i2c[entry->i2c_index]);



	return true;

}



static

void merge_like_dcb_entries(struct drm_device *dev, struct dcb_table *dcb)

{
@@ -6446,88 +6530,62 @@ fabricate_dcb_encoder_table(struct drm_device *dev, struct nvbios *bios) 
}



static int

parse_dcb_table(struct drm_device *dev, struct nvbios *bios)

parse_dcb_entry(struct drm_device *dev, void *data, int idx, u8 *outp)

{

	struct drm_nouveau_private *dev_priv = dev->dev_private;

	struct dcb_table *dcb = &bios->dcb;

	uint16_t dcbptr = 0, i2ctabptr = 0;

	uint8_t *dcbtable;

	uint8_t headerlen = 0x4, entries = DCB_MAX_NUM_ENTRIES;

	bool configblock = true;

	int recordlength = 8, confofs = 4;

	int i;

	struct dcb_table *dcb = &dev_priv->vbios.dcb;

	u32 conf = (dcb->version >= 0x20) ? ROM32(outp[4]) : ROM32(outp[6]);

	u32 conn = ROM32(outp[0]);

	bool ret;



	/* get the offset from 0x36 */

	if (dev_priv->card_type > NV_04) {

		dcbptr = ROM16(bios->data[0x36]);

		if (dcbptr == 0x0000)

			NV_WARN(dev, "No output data (DCB) found in BIOS\n");

	if (apply_dcb_encoder_quirks(dev, idx, &conn, &conf)) {

		struct dcb_entry *entry = new_dcb_entry(dcb);



		NV_TRACEWARN(dev, "DCB entry %02d: %08x %08x\n", idx, conn, conf);



		if (dcb->version >= 0x20)

			ret = parse_dcb20_entry(dev, dcb, conn, conf, entry);

		else

			ret = parse_dcb15_entry(dev, dcb, conn, conf, entry);

		if (!ret)

			return 1; /* stop parsing */



		read_dcb_i2c_entry(dev, dcb->version, dcb->i2c_table,

				   entry->i2c_index,

				   &dcb->i2c[entry->i2c_index]);

	}



	/* this situation likely means a really old card, pre DCB */

	if (dcbptr == 0x0) {

		fabricate_dcb_encoder_table(dev, bios);

	return 0;

}



	dcbtable = &bios->data[dcbptr];



	/* get DCB version */

	dcb->version = dcbtable[0];

	NV_TRACE(dev, "Found Display Configuration Block version %d.%d\n",

		 dcb->version >> 4, dcb->version & 0xf);



	if (dcb->version >= 0x20) { /* NV17+ */

		uint32_t sig;

static int

parse_dcb_table(struct drm_device *dev, struct nvbios *bios)

{

	struct dcb_table *dcb = &bios->dcb;

	u16 i2ctabptr = 0x0000;

	u8 *dcbt;



		if (dcb->version >= 0x30) { /* NV40+ */

			headerlen = dcbtable[1];

			entries = dcbtable[2];

			recordlength = dcbtable[3];

			i2ctabptr = ROM16(dcbtable[4]);

			sig = ROM32(dcbtable[6]);

			dcb->gpio_table_ptr = ROM16(dcbtable[10]);

			dcb->connector_table_ptr = ROM16(dcbtable[20]);

		} else {

			i2ctabptr = ROM16(dcbtable[2]);

			sig = ROM32(dcbtable[4]);

			headerlen = 8;

	dcbt = dcb_table(dev);

	if (!dcbt) {

		/* handle pre-DCB boards */

		if (bios->type == NVBIOS_BMP) {

			fabricate_dcb_encoder_table(dev, bios);

			return 0;

		}



		if (sig != 0x4edcbdcb) {

			NV_ERROR(dev, "Bad Display Configuration Block "

					"signature (%08X)\n", sig);

		return -EINVAL;

	}

	} else if (dcb->version >= 0x15) { /* some NV11 and NV20 */

		char sig[8] = { 0 };



		strncpy(sig, (char *)&dcbtable[-7], 7);

		i2ctabptr = ROM16(dcbtable[2]);

		recordlength = 10;

		confofs = 6;

	NV_TRACE(dev, "DCB version %d.%d\n", dcbt[0] >> 4, dcbt[0] & 0xf);



		if (strcmp(sig, "DEV_REC")) {

			NV_ERROR(dev, "Bad Display Configuration Block "

					"signature (%s)\n", sig);

			return -EINVAL;

		}

	} else {

		/*

		 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but always

		 * has the same single (crt) entry, even when tv-out present, so

		 * the conclusion is this version cannot really be used.

		 * v1.2 tables (some NV6/10, and NV15+) normally have the same

		 * 5 entries, which are not specific to the card and so no use.

		 * v1.2 does have an I2C table that read_dcb_i2c_table can

		 * handle, but cards exist (nv11 in #14821) with a bad i2c table

		 * pointer, so use the indices parsed in parse_bmp_structure.

		 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful

		 */

		NV_TRACEWARN(dev, "No useful information in BIOS output table; "

				  "adding all possible outputs\n");

		fabricate_dcb_encoder_table(dev, bios);

		return 0;

	dcb->version = dcbt[0];

	if (dcb->version >= 0x30) {

		i2ctabptr = ROM16(dcbt[4]);

		dcb->gpio_table_ptr = ROM16(dcbt[10]);

		dcb->connector_table_ptr = ROM16(dcbt[20]);

	} else

	if (dcb->version >= 0x15) {

		i2ctabptr = ROM16(dcbt[2]);

	}



	if (!i2ctabptr)
@@ -6543,44 +6601,14 @@ parse_dcb_table(struct drm_device *dev, struct nvbios *bios) 
		 */

		if (dcb->version >= 0x22) {

			int idx = (dcb->version >= 0x40 ?

				   dcb->i2c_default_indices & 0xf :

				   2);

				   dcb->i2c_default_indices & 0xf : 2);



			read_dcb_i2c_entry(dev, dcb->version, dcb->i2c_table,

					   idx, &dcb->i2c[idx]);

		}

	}



	if (entries > DCB_MAX_NUM_ENTRIES)

		entries = DCB_MAX_NUM_ENTRIES;



	for (i = 0; i < entries; i++) {

		uint32_t connection, config = 0;



		connection = ROM32(dcbtable[headerlen + recordlength * i]);

		if (configblock)

			config = ROM32(dcbtable[headerlen + confofs + recordlength * i]);



		/* seen on an NV11 with DCB v1.5 */

		if (connection == 0x00000000)

			break;



		/* seen on an NV17 with DCB v2.0 */

		if (connection == 0xffffffff)

			break;



		if ((connection & 0x0000000f) == 0x0000000f)

			continue;



		if (!apply_dcb_encoder_quirks(dev, i, &connection, &config))

			continue;



		NV_TRACEWARN(dev, "Raw DCB entry %d: %08x %08x\n",

			     dcb->entries, connection, config);



		if (!parse_dcb_entry(dev, dcb, connection, config))

			break;

	}

	dcb_outp_foreach(dev, NULL, parse_dcb_entry);



	/*

	 * apart for v2.1+ not being known for requiring merging, this

drivers/gpu/drm/nouveau/nouveau_bios.h

+6 −0
Original line number Diff line number Diff line
@@ -117,6 +117,7 @@ enum dcb_type { 
	OUTPUT_LVDS = 3,

	OUTPUT_DP = 6,

	OUTPUT_EOL = 14, /* DCB 4.0+, appears to be end-of-list */

	OUTPUT_UNUSED = 15,

	OUTPUT_ANY = -1

};
@@ -339,4 +340,9 @@ struct nvbios { 
	} legacy;

};



void *dcb_table(struct drm_device *);

u8 *dcb_outp(struct drm_device *, u8 idx);

int dcb_outp_foreach(struct drm_device *, void *data,

		     int (*)(struct drm_device *, void *, int idx, u8 *outp));



#endif

drivers/gpu/drm/nouveau/nouveau_drv.h

+7 −0
Original line number Diff line number Diff line
@@ -1608,6 +1608,13 @@ extern void nv_wo32(struct nouveau_gpuobj *, u32 offset, u32 val); 
#define NV_TRACEWARN(d, fmt, arg...) NV_PRINTK(KERN_NOTICE, d, fmt, ##arg)

#define NV_TRACE(d, fmt, arg...) NV_PRINTK(KERN_INFO, d, fmt, ##arg)

#define NV_WARN(d, fmt, arg...) NV_PRINTK(KERN_WARNING, d, fmt, ##arg)

#define NV_WARNONCE(d, fmt, arg...) do {                                       \

	static int _warned = 0;                                                \

	if (!_warned) {                                                        \

		NV_WARN(d, fmt, ##arg);                                        \

		_warned = 1;                                                   \

	}                                                                      \

} while(0)



/* nouveau_reg_debug bitmask */

enum {

CRA Git | Maintained and supported by SUSTech CRA and CCSE