diff options
Diffstat (limited to 'src/drivers/intel/gma/acpi.c')
| -rw-r--r-- | src/drivers/intel/gma/acpi.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/src/drivers/intel/gma/acpi.c b/src/drivers/intel/gma/acpi.c index 3f71a5ea84..d3fb69dec8 100644 --- a/src/drivers/intel/gma/acpi.c +++ b/src/drivers/intel/gma/acpi.c @@ -102,39 +102,38 @@ drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info * } /* - Method(_DCS, 0) - { - Return (^^XDCS(<device number>)) - } + * _DCS, _DGS and _DSS are required by specification. However, + * we never implemented them properly, and no OS driver com- + * plained yet. So we stub them out and keep the traditional + * behavior in case an OS driver checks for their existence. + */ + + /* + Method(_DCS, 0) + { + Return (0x1d) + } */ acpigen_write_method("_DCS", 0); - acpigen_emit_byte(0xa4); /* ReturnOp. */ - acpigen_emit_namestring("^^XDCS"); - acpigen_write_byte(i); + acpigen_write_return_integer(0x1d); acpigen_pop_len(); /* - Method(_DGS, 0) - { - Return (^^XDGS(<device number>)) - } + Method(_DGS, 0) + { + Return (0) + } */ acpigen_write_method("_DGS", 0); - acpigen_emit_byte(0xa4); /* ReturnOp. */ - acpigen_emit_namestring("^^XDGS"); - acpigen_write_byte(i); + acpigen_write_return_integer(0); acpigen_pop_len(); /* - Method(_DSS, 1) - { - ^^XDSS(0x5a, Arg0) - } + Method(_DSS, 1) + { + } */ acpigen_write_method("_DSS", 1); - acpigen_emit_namestring("^^XDSS"); - acpigen_write_byte(i); - acpigen_emit_byte(0x68); /* Arg0Op. */ acpigen_pop_len(); acpigen_pop_len(); |