There is a number of bridge drivers that supports a single media bus format for DSI. Add a helper to avoid duplicating the code.
Signed-off-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_atomic_helper.c | 41 +++++++++++++++++++++++++++++ include/drm/drm_atomic_helper.h | 7 +++++ 2 files changed, 48 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index a7a05e1e26bb..94f313dc196f 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3549,3 +3549,44 @@ drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, return input_fmts; } EXPORT_SYMBOL(drm_atomic_helper_bridge_propagate_bus_fmt); + +/** + * drm_atomic_helper_bridge_dsi_input_bus_fmt - Define one DSI output format + * + * @bridge: bridge control structure + * @bridge_state: new bridge state + * @crtc_state: new CRTC state + * @conn_state: new connector state + * @output_fmt: tested output bus format + * @num_input_fmts: will contain the size of the returned array + * + * This helper is an implementation of the + * &drm_bridge_funcs.atomic_get_input_bus_fmts operation for bridges that supports + * a single DSI media bus format MEDIA_BUS_FMT_RGB888_1X24. + * + * RETURNS + * A format array with one entry containing MEDIA_BUS_FMT_RGB888_1X24, + * or NULL if the allocation failed + */ +u32 * +drm_atomic_helper_bridge_dsi_input_bus_fmt(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + u32 output_fmt, + unsigned int *num_input_fmts) +{ + u32 *input_fmts; + + *num_input_fmts = 0; + + input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts), GFP_KERNEL); + if (!input_fmts) + return NULL; + + /* This is the DSI-end bus format */ + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; + *num_input_fmts = 1; + + return input_fmts; +} diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index 4045e2507e11..0e81b6f637d6 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -231,4 +231,11 @@ drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, u32 output_fmt, unsigned int *num_input_fmts);
+u32 * +drm_atomic_helper_bridge_dsi_input_bus_fmt(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + u32 output_fmt, + unsigned int *num_input_fmts); #endif /* DRM_ATOMIC_HELPER_H_ */