Implement .atomic_get_input_bus_fmts callback, which sets up the input (DSI-end) format, and that format can then be used in pipeline format negotiation between the DSI-end of this bridge and the other component closer to the scanout engine.
Signed-off-by: Marek Vasut marex@denx.de Cc: Jagan Teki jagan@amarulasolutions.com Cc: Maxime Ripard maxime@cerno.tech Cc: Robert Foss robert.foss@linaro.org Cc: Sam Ravnborg sam@ravnborg.org Cc: Thomas Zimmermann tzimmermann@suse.de To: dri-devel@lists.freedesktop.org --- V2: Rebase on next-20220214 --- drivers/gpu/drm/bridge/chipone-icn6211.c | 27 ++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c index 07e698dc38cb4..71a08b11f9692 100644 --- a/drivers/gpu/drm/bridge/chipone-icn6211.c +++ b/drivers/gpu/drm/bridge/chipone-icn6211.c @@ -389,6 +389,32 @@ static int chipone_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flag return drm_bridge_attach(bridge->encoder, icn->panel_bridge, bridge, flags); }
+#define MAX_INPUT_SEL_FORMATS 1 + +static u32 * +chipone_atomic_get_input_bus_fmts(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; +} + static const struct drm_bridge_funcs chipone_bridge_funcs = { .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, @@ -398,6 +424,7 @@ static const struct drm_bridge_funcs chipone_bridge_funcs = { .atomic_post_disable = chipone_atomic_post_disable, .mode_set = chipone_mode_set, .attach = chipone_attach, + .atomic_get_input_bus_fmts = chipone_atomic_get_input_bus_fmts, };
static int chipone_parse_dt(struct chipone *icn)