drm/nouveau/fb: make use of M0203 routines for ram type determination

 */

#include <subdev/bios.h>

#include <subdev/bios/bit.h>

#include <subdev/bios/M0203.h>

#include "priv.h"

int

nouveau_fb_bios_memtype(struct nouveau_bios *bios)

{

	struct bit_entry M;

	u8 ramcfg;

	ramcfg = (nv_rd32(bios, 0x101000) & 0x0000003c) >> 2;

	if (!bit_entry(bios, 'M', &M) && M.version == 2 && M.length >= 5) {

		u16 table   = nv_ro16(bios, M.offset + 3);

		u8  version = nv_ro08(bios, table + 0);

		u8  header  = nv_ro08(bios, table + 1);

		u8  record  = nv_ro08(bios, table + 2);

		u8  entries = nv_ro08(bios, table + 3);

		if (table && version == 0x10 && ramcfg < entries) {

			u16 entry = table + header + (ramcfg * record);

			switch (nv_ro08(bios, entry) & 0x0f) {

			case 0: return NV_MEM_TYPE_DDR2;

			case 1: return NV_MEM_TYPE_DDR3;

			case 2: return NV_MEM_TYPE_GDDR3;

			case 3: return NV_MEM_TYPE_GDDR5;

	const u8 ramcfg = (nv_rd32(bios, 0x101000) & 0x0000003c) >> 2;

	struct nvbios_M0203E M0203E;

	u8 ver, hdr;

	if (nvbios_M0203Em(bios, ramcfg, &ver, &hdr, &M0203E)) {

		switch (M0203E.type) {

		case M0203E_TYPE_DDR2 : return NV_MEM_TYPE_DDR2;

		case M0203E_TYPE_DDR3 : return NV_MEM_TYPE_DDR3;

		case M0203E_TYPE_GDDR3: return NV_MEM_TYPE_GDDR3;

		case M0203E_TYPE_GDDR5: return NV_MEM_TYPE_GDDR5;

		default:

				break;

			}

			nv_warn(bios, "M0203E type %02x\n", M0203E.type);

			return NV_MEM_TYPE_UNKNOWN;

		}

	}

	nv_warn(bios, "M0203E not matched!\n");

	return NV_MEM_TYPE_UNKNOWN;

}