drm/nouveau/bios: add proper support for opcode 0x59

More analysis shows that this is identical to 0x79 except that it loads
the frequency indirectly from elsewhere in the VBIOS.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91025
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c

@@ -577,9 +577,6 @@ init_reserved(struct nvbios_init *init)
 	u8 length, i;
 
 	switch (opcode) {
-	case 0x59:
-		length = 7;
-		break;
 	case 0xaa:
 		length = 4;
 		break;
@@ -1287,6 +1284,25 @@ init_zm_reg_sequence(struct nvbios_init *init)
 	}
 }
 
+/**
+ * INIT_PLL_INDIRECT - opcode 0x59
+ *
+ */
+static void
+init_pll_indirect(struct nvbios_init *init)
+{
+	struct nvkm_bios *bios = init->bios;
+	u32  reg = nv_ro32(bios, init->offset + 1);
+	u16 addr = nv_ro16(bios, init->offset + 5);
+	u32 freq = (u32)nv_ro16(bios, addr) * 1000;
+
+	trace("PLL_INDIRECT\tR[0x%06x] =PLL= VBIOS[%04x] = %dkHz\n",
+	      reg, addr, freq);
+	init->offset += 7;
+
+	init_prog_pll(init, reg, freq);
+}
+
 /**
  * INIT_ZM_REG_INDIRECT - opcode 0x5a
  *
@@ -2167,7 +2183,7 @@ static struct nvbios_init_opcode {
 	[0x56] = { init_condition_time },
 	[0x57] = { init_ltime },
 	[0x58] = { init_zm_reg_sequence },
-	[0x59] = { init_reserved },
+	[0x59] = { init_pll_indirect },
 	[0x5a] = { init_zm_reg_indirect },
 	[0x5b] = { init_sub_direct },
 	[0x5c] = { init_jump },