• Jean Delvare's avatar
    drm/exynos: Fix PTN3460 dependency · b26c04f4
    Jean Delvare authored
    The following configuration options combination:
    
    CONFIG_DRM_EXYNOS_DP=y
    CONFIG_DRM_PTN3460=m
    
    currently leads to the following linker failure:
    
    drivers/built-in.o: In function `exynos_drm_attach_lcd_bridge':
    .../drivers/gpu/drm/exynos/exynos_dp_core.c:1004:
    undefined reference to `ptn3460_init'
    
    This is because ptn3460_init can't be implemented in a module while
    its caller is built into the kernel. So add the proper dependency in
    Kconfig so that the above can't happen.
    
    I moved DRM_PTN3460 earlier in Kconfig, next to the I2C helper module
    section, so that the user has a chance to select it before moving to
    the Exynos-specific section.
    
    IMHO the proper way to solve the problem would be to turn ptn3460 into
    a clean I2C driver, similar to the other I2C helper chip drivers. It's
    the only way to not sink into impossible-to-guess dependencies. Then
    ptn3460 could even be moved together with the other I2C helper chip
    drivers.
    Signed-off-by: default avatarJean Delvare <jdelvare@suse.de>
    Reviewed-by: default avatarThierry Reding <treding@nvidia.com>
    Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
    b26c04f4
Kconfig 2.63 KB