Add support for MEDIA_BUS_FMT_FIXED, which is e.g. requested for USB-C DP chains as the last bridge in the chain (aux-hpd-bridge) does not implement atomic_get_output_bus_fmts(), which results in the generic drm_atomic_bridge_chain_select_bus_fmts() code using MEDIA_BUS_FMT_FIXED instead.
Signed-off-by: Sebastian Reichel <[email protected]> --- drivers/gpu/drm/bridge/synopsys/dw-dp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-dp.c b/drivers/gpu/drm/bridge/synopsys/dw-dp.c index 36ee6e027af5..ac7779e42bb2 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-dp.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-dp.c @@ -1528,6 +1528,7 @@ static int dw_dp_bridge_atomic_check(struct drm_bridge *bridge, struct drm_connector_state *conn_state) { struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; + unsigned int out_bus_format = bridge_state->output_bus_cfg.format; struct dw_dp *dp = bridge_to_dp(bridge); struct dw_dp_bridge_state *state; const struct dw_dp_output_format *fmt; @@ -1538,7 +1539,10 @@ static int dw_dp_bridge_atomic_check(struct drm_bridge *bridge, state = to_dw_dp_bridge_state(bridge_state); mode = &state->mode; - fmt = dw_dp_get_output_format(bridge_state->output_bus_cfg.format); + if (out_bus_format == MEDIA_BUS_FMT_FIXED) + out_bus_format = MEDIA_BUS_FMT_RGB888_1X24; + + fmt = dw_dp_get_output_format(out_bus_format); if (!fmt) return -EINVAL; -- 2.53.0
