• Jyri Sarha's avatar
    drm/tilcdc: Add support for external tda998x encoder · 103cd8bc
    Jyri Sarha authored
    Add support for an external compontised DRM encoder. The external
    encoder can be connected to tilcdc trough device tree graph binding.
    The binding document for tilcdc has been updated. The current
    implementation supports only tda998x encoder.
    
    To be able to filter out the unsupported video modes the tilcdc driver
    needs to hijack the external connectors helper functions. The tilcdc
    installes new helper functions that are otherwise identical to
    orignals, but the mode_valid() call-back check the mode first localy,
    before calling the original call-back. The tilcdc dirver restores the
    original helper functions before it is unbound from the external
    device.
    
    I got the idea and some lines of code from Jean-Francois Moine's
    "drm/tilcdc: Change the interface with the tda998x driver"-patch.
    Signed-off-by: default avatarJyri Sarha <jsarha@ti.com>
    Acked-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
    103cd8bc
tilcdc_crtc.c 19 KB