diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2024-12-19 13:05:34 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-02-12 21:02:54 -0500 |
| commit | 20f48be63d1ad0ffa359c9612612876544669339 (patch) | |
| tree | 53eb5002ea6576daeed7201ea8886160448c2c2c /drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | |
| parent | 1c0b144bf7628a62575a4ec26623f7a6cdf0cb2b (diff) | |
drm/amdgpu: add OEM i2c bus for polaris chips
It uses the VGADCC bus. DC doesn't use this bus, so it
is safe to add it here.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c index 263242bd7c10..e476e45b996a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c @@ -144,6 +144,38 @@ void amdgpu_atombios_i2c_init(struct amdgpu_device *adev) } } +void amdgpu_atombios_oem_i2c_init(struct amdgpu_device *adev, u8 i2c_id) +{ + struct atom_context *ctx = adev->mode_info.atom_context; + ATOM_GPIO_I2C_ASSIGMENT *gpio; + struct amdgpu_i2c_bus_rec i2c; + int index = GetIndexIntoMasterTable(DATA, GPIO_I2C_Info); + struct _ATOM_GPIO_I2C_INFO *i2c_info; + uint16_t data_offset, size; + int i, num_indices; + char stmp[32]; + + if (amdgpu_atom_parse_data_header(ctx, index, &size, NULL, NULL, &data_offset)) { + i2c_info = (struct _ATOM_GPIO_I2C_INFO *)(ctx->bios + data_offset); + + num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) / + sizeof(ATOM_GPIO_I2C_ASSIGMENT); + + gpio = &i2c_info->asGPIO_Info[0]; + for (i = 0; i < num_indices; i++) { + i2c = amdgpu_atombios_get_bus_rec_for_i2c_gpio(gpio); + + if (i2c.valid && i2c.i2c_id == i2c_id) { + sprintf(stmp, "OEM 0x%x", i2c.i2c_id); + adev->i2c_bus[i] = amdgpu_i2c_create(adev_to_drm(adev), &i2c, stmp); + break; + } + gpio = (ATOM_GPIO_I2C_ASSIGMENT *) + ((u8 *)gpio + sizeof(ATOM_GPIO_I2C_ASSIGMENT)); + } + } +} + struct amdgpu_gpio_rec amdgpu_atombios_lookup_gpio(struct amdgpu_device *adev, u8 id) |