drm/nouveau/bios/init: handle INIT_RESET_END devinit opcode

Signal that the reset sequence has completed.

This opcode signals that the software reset sequence has completed.
Ordinarily, no actual operations are performed by the opcode.
However it allows for possible software work arounds by devinit
engines in software agents other than the VBIOS, such as the resman,
FCODE, and EFI driver.

Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
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 5e02832..9de74f4 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c
@@ -1946,6 +1946,17 @@ init_reset_begun(struct nvbios_init *init)
 }
 
 /**
+ * INIT_RESET_END - opcode 0x8d
+ *
+ */
+static void
+init_reset_end(struct nvbios_init *init)
+{
+       trace("RESET_END\n");
+       init->offset += 1;
+}
+
+/**
  * INIT_GPIO - opcode 0x8e
  *
  */
@@ -2272,7 +2283,7 @@ static struct nvbios_init_opcode {
        [0x7a] = { init_zm_reg },
        [0x87] = { init_ram_restrict_pll },
        [0x8c] = { init_reset_begun },
-       [0x8d] = { init_reserved },
+       [0x8d] = { init_reset_end },
        [0x8e] = { init_gpio },
        [0x8f] = { init_ram_restrict_zm_reg_group },
        [0x90] = { init_copy_zm_reg },