drm/nouveau/bios: add 0x59 and 0x5a opcodes

Opcode 0x5a is a register write for data looked up from another part of
the VBIOS image. 0x59 is a more complex opcode, but we may as well
recognize it. These occur on a single known instance of Riva TNT2
hardware.

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>

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
index f67cdae..1f590f8 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
@@ -577,6 +577,9 @@ init_reserved(struct nvbios_init *init)
        u8 length, i;
 
        switch (opcode) {
+       case 0x59:
+               length = 7;
+               break;
        case 0xaa:
                length = 4;
                break;
@@ -1285,6 +1288,25 @@ init_zm_reg_sequence(struct nvbios_init *init)
 }
 
 /**
+ * INIT_ZM_REG_INDIRECT - opcode 0x5a
+ *
+ */
+static void
+init_zm_reg_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 data = nv_ro32(bios, addr);
+
+       trace("ZM_REG_INDIRECT\tR[0x%06x] = VBIOS[0x%04x] = 0x%08x\n",
+             reg, addr, data);
+       init->offset += 7;
+
+       init_wr32(init, addr, data);
+}
+
+/**
  * INIT_SUB_DIRECT - opcode 0x5b
  *
  */
@@ -2145,6 +2167,8 @@ static struct nvbios_init_opcode {
        [0x56] = { init_condition_time },
        [0x57] = { init_ltime },
        [0x58] = { init_zm_reg_sequence },
+       [0x59] = { init_reserved },
+       [0x5a] = { init_zm_reg_indirect },
        [0x5b] = { init_sub_direct },
        [0x5c] = { init_jump },
        [0x5e] = { init_i2c_if },