diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c | 83 |
1 files changed, 43 insertions, 40 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c index d79cb13e1aa8..8179d0814db9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_i2c.c @@ -225,13 +225,23 @@ void amdgpu_i2c_destroy(struct amdgpu_i2c_chan *i2c) kfree(i2c); } -/* Add the default buses */ void amdgpu_i2c_init(struct amdgpu_device *adev) { - if (amdgpu_hw_i2c) - DRM_INFO("hw_i2c forced on, you may experience display detection problems!\n"); - - amdgpu_atombios_i2c_init(adev); + if (!adev->is_atom_fw) { + if (!amdgpu_device_has_dc_support(adev)) { + amdgpu_atombios_i2c_init(adev); + } else { + switch (adev->asic_type) { + case CHIP_POLARIS10: + case CHIP_POLARIS11: + case CHIP_POLARIS12: + amdgpu_atombios_oem_i2c_init(adev, 0x97); + break; + default: + break; + } + } + } } /* remove all the buses */ @@ -247,22 +257,6 @@ void amdgpu_i2c_fini(struct amdgpu_device *adev) } } -/* Add additional buses */ -void amdgpu_i2c_add(struct amdgpu_device *adev, - const struct amdgpu_i2c_bus_rec *rec, - const char *name) -{ - struct drm_device *dev = adev_to_drm(adev); - int i; - - for (i = 0; i < AMDGPU_MAX_I2C_BUS; i++) { - if (!adev->i2c_bus[i]) { - adev->i2c_bus[i] = amdgpu_i2c_create(dev, rec, name); - return; - } - } -} - /* looks up bus based on id */ struct amdgpu_i2c_chan * amdgpu_i2c_lookup(struct amdgpu_device *adev, @@ -279,7 +273,7 @@ amdgpu_i2c_lookup(struct amdgpu_device *adev, return NULL; } -static void amdgpu_i2c_get_byte(struct amdgpu_i2c_chan *i2c_bus, +static int amdgpu_i2c_get_byte(struct amdgpu_i2c_chan *i2c_bus, u8 slave_addr, u8 addr, u8 *val) @@ -304,16 +298,18 @@ static void amdgpu_i2c_get_byte(struct amdgpu_i2c_chan *i2c_bus, out_buf[0] = addr; out_buf[1] = 0; - if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) { - *val = in_buf[0]; - DRM_DEBUG("val = 0x%02x\n", *val); - } else { - DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n", - addr, *val); + if (i2c_transfer(&i2c_bus->adapter, msgs, 2) != 2) { + DRM_DEBUG("i2c 0x%02x read failed\n", addr); + return -EIO; } + + *val = in_buf[0]; + DRM_DEBUG("val = 0x%02x\n", *val); + + return 0; } -static void amdgpu_i2c_put_byte(struct amdgpu_i2c_chan *i2c_bus, +static int amdgpu_i2c_put_byte(struct amdgpu_i2c_chan *i2c_bus, u8 slave_addr, u8 addr, u8 val) @@ -329,9 +325,12 @@ static void amdgpu_i2c_put_byte(struct amdgpu_i2c_chan *i2c_bus, out_buf[0] = addr; out_buf[1] = val; - if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) - DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n", - addr, val); + if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) { + DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n", addr, val); + return -EIO; + } + + return 0; } /* ddc router switching */ @@ -346,16 +345,18 @@ amdgpu_i2c_router_select_ddc_port(const struct amdgpu_connector *amdgpu_connecto if (!amdgpu_connector->router_bus) return; - amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, - 0x3, &val); + 0x3, &val)) + return; val &= ~amdgpu_connector->router.ddc_mux_control_pin; amdgpu_i2c_put_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, 0x3, val); - amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, - 0x1, &val); + 0x1, &val)) + return; val &= ~amdgpu_connector->router.ddc_mux_control_pin; val |= amdgpu_connector->router.ddc_mux_state; amdgpu_i2c_put_byte(amdgpu_connector->router_bus, @@ -375,16 +376,18 @@ amdgpu_i2c_router_select_cd_port(const struct amdgpu_connector *amdgpu_connector if (!amdgpu_connector->router_bus) return; - amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, - 0x3, &val); + 0x3, &val)) + return; val &= ~amdgpu_connector->router.cd_mux_control_pin; amdgpu_i2c_put_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, 0x3, val); - amdgpu_i2c_get_byte(amdgpu_connector->router_bus, + if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus, amdgpu_connector->router.i2c_addr, - 0x1, &val); + 0x1, &val)) + return; val &= ~amdgpu_connector->router.cd_mux_control_pin; val |= amdgpu_connector->router.cd_mux_state; amdgpu_i2c_put_byte(amdgpu_connector->router_bus, |