diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_i2c.c | 91 |
1 files changed, 69 insertions, 22 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c index da3da1e89d0..75b090f6020 100644 --- a/drivers/gpu/drm/radeon/radeon_i2c.c +++ b/drivers/gpu/drm/radeon/radeon_i2c.c @@ -59,7 +59,7 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector) } -void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) +static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) { struct radeon_device *rdev = i2c->dev->dev_private; struct radeon_i2c_bus_rec *rec = &i2c->rec; @@ -168,6 +168,32 @@ static void set_data(void *i2c_priv, int data) WREG32(rec->en_data_reg, val); } +static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg *msgs, int num) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + int ret; + + radeon_i2c_do_lock(i2c, 1); + if (i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num) == num) + ret = num; + else + ret = -1; + radeon_i2c_do_lock(i2c, 0); + + return ret; +} + +static u32 radeon_i2c_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm radeon_i2c_algo = { + .master_xfer = radeon_i2c_xfer, + .functionality = radeon_i2c_func, +}; + struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, struct radeon_i2c_bus_rec *rec, const char *name) @@ -179,21 +205,34 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, if (i2c == NULL) return NULL; - i2c->adapter.owner = THIS_MODULE; i2c->dev = dev; - i2c_set_adapdata(&i2c->adapter, i2c); - i2c->adapter.algo_data = &i2c->algo.bit; - i2c->algo.bit.setsda = set_data; - i2c->algo.bit.setscl = set_clock; - i2c->algo.bit.getsda = get_data; - i2c->algo.bit.getscl = get_clock; - i2c->algo.bit.udelay = 20; + i2c->rec = *rec; + /* set the internal bit adapter */ + i2c->algo.radeon.bit_adapter.owner = THIS_MODULE; + i2c_set_adapdata(&i2c->algo.radeon.bit_adapter, i2c); + sprintf(i2c->algo.radeon.bit_adapter.name, "Radeon internal i2c bit bus %s", name); + i2c->algo.radeon.bit_adapter.algo_data = &i2c->algo.radeon.bit_data; + i2c->algo.radeon.bit_data.setsda = set_data; + i2c->algo.radeon.bit_data.setscl = set_clock; + i2c->algo.radeon.bit_data.getsda = get_data; + i2c->algo.radeon.bit_data.getscl = get_clock; + i2c->algo.radeon.bit_data.udelay = 20; /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always * make this, 2 jiffies is a lot more reliable */ - i2c->algo.bit.timeout = 2; - i2c->algo.bit.data = i2c; - i2c->rec = *rec; - ret = i2c_bit_add_bus(&i2c->adapter); + i2c->algo.radeon.bit_data.timeout = 2; + i2c->algo.radeon.bit_data.data = i2c; + ret = i2c_bit_add_bus(&i2c->algo.radeon.bit_adapter); + if (ret) { + DRM_INFO("Failed to register internal bit i2c %s\n", name); + goto out_free; + } + /* set the radeon i2c adapter */ + i2c->adapter.owner = THIS_MODULE; + i2c_set_adapdata(&i2c->adapter, i2c); + sprintf(i2c->adapter.name, "Radeon i2c %s", name); + i2c->adapter.algo_data = &i2c->algo.radeon; + i2c->adapter.algo = &radeon_i2c_algo; + ret = i2c_add_adapter(&i2c->adapter); if (ret) { DRM_INFO("Failed to register i2c %s\n", name); goto out_free; @@ -237,11 +276,19 @@ out_free: } - void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) { if (!i2c) return; + i2c_del_adapter(&i2c->algo.radeon.bit_adapter); + i2c_del_adapter(&i2c->adapter); + kfree(i2c); +} + +void radeon_i2c_destroy_dp(struct radeon_i2c_chan *i2c) +{ + if (!i2c) + return; i2c_del_adapter(&i2c->adapter); kfree(i2c); @@ -252,10 +299,10 @@ struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) return NULL; } -void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus, - u8 slave_addr, - u8 addr, - u8 *val) +void radeon_i2c_get_byte(struct radeon_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 *val) { u8 out_buf[2]; u8 in_buf[2]; @@ -286,10 +333,10 @@ void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus, } } -void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus, - u8 slave_addr, - u8 addr, - u8 val) +void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 val) { uint8_t out_buf[2]; struct i2c_msg msg = { |