From e7afb623b4fb82089c9a50c733c740522b8220bc Mon Sep 17 00:00:00 2001 From: Ville Syrjälä Date: Mon, 29 Oct 2018 20:34:52 +0200 Subject: drm: Add drm_any_plane_has_format() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a function to check whether there is at least one plane that supports a specific format and modifier combination. Drivers can use this to reject unsupported formats/modifiers in .fb_create(). v2: Accept anyformat if the driver doesn't do planes (Eric) s/planes_have_format/any_plane_has_format/ (Eric) Check the modifier as well since we already have a function that does both v3: Don't do the check in the core since we may not know the modifier yet, instead export the function and let drivers call it themselves Cc: Eric Anholt Cc: Dhinakaran Pandiyan Signed-off-by: Ville Syrjälä Reviewed-by: Dhinakaran Pandiyan Link: https://patchwork.freedesktop.org/patch/msgid/20181029183453.28541-1-ville.syrjala@linux.intel.com --- include/drm/drm_mode_config.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/drm/drm_mode_config.h') diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index d643d268693e..5dbeabdbaf91 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -52,6 +52,12 @@ struct drm_mode_config_funcs { * requested metadata, but most of that is left to the driver. See * &struct drm_mode_fb_cmd2 for details. * + * To validate the pixel format and modifier drivers can use + * drm_any_plane_has_format() to make sure at least one plane supports + * the requested values. Note that the driver must first determine the + * actual modifier used if the request doesn't have it specified, + * ie. when (@mode_cmd->flags & DRM_MODE_FB_MODIFIERS) == 0. + * * If the parameters are deemed valid and the backing storage objects in * the underlying memory manager all exist, then the driver allocates * a new &drm_framebuffer structure, subclassed to contain -- cgit v1.2.3