diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_i2c.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c index 5def6f5dff3..bfd2ce5f537 100644 --- a/drivers/gpu/drm/radeon/radeon_i2c.c +++ b/drivers/gpu/drm/radeon/radeon_i2c.c @@ -52,6 +52,10 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector) } }; + /* on hw with routers, select right port */ + if (radeon_connector->router.valid) + radeon_router_select_port(radeon_connector); + ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); if (ret == 2) return true; @@ -960,6 +964,59 @@ void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) kfree(i2c); } +/* Add the default buses */ +void radeon_i2c_init(struct radeon_device *rdev) +{ + if (rdev->is_atom_bios) + radeon_atombios_i2c_init(rdev); + else + radeon_combios_i2c_init(rdev); +} + +/* remove all the buses */ +void radeon_i2c_fini(struct radeon_device *rdev) +{ + int i; + + for (i = 0; i < RADEON_MAX_I2C_BUS; i++) { + if (rdev->i2c_bus[i]) { + radeon_i2c_destroy(rdev->i2c_bus[i]); + rdev->i2c_bus[i] = NULL; + } + } +} + +/* Add additional buses */ +void radeon_i2c_add(struct radeon_device *rdev, + struct radeon_i2c_bus_rec *rec, + const char *name) +{ + struct drm_device *dev = rdev->ddev; + int i; + + for (i = 0; i < RADEON_MAX_I2C_BUS; i++) { + if (!rdev->i2c_bus[i]) { + rdev->i2c_bus[i] = radeon_i2c_create(dev, rec, name); + return; + } + } +} + +/* looks up bus based on id */ +struct radeon_i2c_chan *radeon_i2c_lookup(struct radeon_device *rdev, + struct radeon_i2c_bus_rec *i2c_bus) +{ + int i; + + for (i = 0; i < RADEON_MAX_I2C_BUS; i++) { + if (rdev->i2c_bus[i] && + (rdev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) { + return rdev->i2c_bus[i]; + } + } + return NULL; +} + struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) { return NULL; @@ -1020,3 +1077,28 @@ void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus, addr, val); } +/* router switching */ +void radeon_router_select_port(struct radeon_connector *radeon_connector) +{ + u8 val; + + if (!radeon_connector->router.valid) + return; + + radeon_i2c_get_byte(radeon_connector->router_bus, + radeon_connector->router.i2c_addr, + 0x3, &val); + val &= radeon_connector->router.mux_control_pin; + radeon_i2c_put_byte(radeon_connector->router_bus, + radeon_connector->router.i2c_addr, + 0x3, val); + radeon_i2c_get_byte(radeon_connector->router_bus, + radeon_connector->router.i2c_addr, + 0x1, &val); + val &= radeon_connector->router.mux_control_pin; + val |= radeon_connector->router.mux_state; + radeon_i2c_put_byte(radeon_connector->router_bus, + radeon_connector->router.i2c_addr, + 0x1, val); +} + |