diff options
Diffstat (limited to 'src/drivers/intel/gma')
| -rw-r--r-- | src/drivers/intel/gma/edid.c | 24 | ||||
| -rw-r--r-- | src/drivers/intel/gma/edid.h | 1 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/drivers/intel/gma/edid.c b/src/drivers/intel/gma/edid.c index e70156eb28..052f099177 100644 --- a/src/drivers/intel/gma/edid.c +++ b/src/drivers/intel/gma/edid.c @@ -37,6 +37,30 @@ static void wait_rdy(u8 *mmio) } } +static void intel_gmbus_stop_bus(u8 * mmio, u8 bus) +{ + wait_rdy(mmio); + write32(mmio + 4 * 0, bus); + wait_rdy(mmio); + write32(mmio + 4 * 8, 0); + write32(mmio + 4 * 1, 0x4e0400a1); + wait_rdy(mmio); + write32(mmio + 4 * 8, 0); + write32(mmio + 4 * 1, 0x80000000); + write32(mmio + 4 * 1, 0x00000000); + wait_rdy(mmio); + write32(mmio + 4 * 1, 0x480000a0); + wait_rdy(mmio); + write32(mmio + 4 * 0, 0x48000000); + write32(mmio + 4 * 2, 0x00008000); +} + +void intel_gmbus_stop(u8 *mmio) +{ + intel_gmbus_stop_bus(mmio, 6); + intel_gmbus_stop_bus(mmio, 2); +} + void intel_gmbus_read_edid(u8 *mmio, u8 bus, u8 slave, u8 *edid, u32 edid_size) { int i; diff --git a/src/drivers/intel/gma/edid.h b/src/drivers/intel/gma/edid.h index c4763919bd..d8214cf329 100644 --- a/src/drivers/intel/gma/edid.h +++ b/src/drivers/intel/gma/edid.h @@ -1 +1,2 @@ void intel_gmbus_read_edid(u8 *gmbus_mmio, u8 bus, u8 slave, u8 *edid, u32 edid_size); +void intel_gmbus_stop(u8 *gmbus_mmio); |