• Noralf Trønnes's avatar
    drm/vc4: Use drm_fbdev_generic_setup() · 233386d8
    Noralf Trønnes authored
    The CMA helper is already using the drm_fb_helper_generic_probe part of
    the generic fbdev emulation. This patch makes full use of the generic
    fbdev emulation by using its drm_client callbacks. This means that
    drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are
    now handled by the emulation code. Additionally fbdev unregister happens
    automatically on drm_dev_unregister().
    
    The drm_fbdev_generic_setup() call is put after drm_dev_register() in the
    driver. This is done to highlight the fact that fbdev emulation is an
    internal client that makes use of the driver, it is not part of the
    driver as such. If fbdev setup fails, an error is printed, but the driver
    succeeds probing.
    
    drm_fbdev_generic_setup() handles mode_config.num_connector being zero.
    In that case it retries fbdev setup on the next .output_poll_changed.
    
    Cc: Eric Anholt <eric@anholt.net>
    Signed-off-by: default avatarNoralf Trønnes <noralf@tronnes.org>
    Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
    Acked-by: default avatarEric Anholt <eric@anholt.net>
    Link: https://patchwork.freedesktop.org/patch/msgid/20180908134648.2582-19-noralf@tronnes.org
    233386d8
vc4_kms.c 11.3 KB