Commit bc36ee98 authored by Aradhya Bhatia's avatar Aradhya Bhatia Committed by Dmitry Baryshkov
Browse files

drm/bridge: cdns-dsi: Add input format negotiation 



Add support for the input format negotiation hook, that uses the helper
drm_mipi_dsi_get_input_bus_fmt() for dsi hosts, to figure out the
required input format.

Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: default avatarAradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: default avatarAradhya Bhatia <aradhya.bhatia@linux.dev>
Link: https://lore.kernel.org/r/20250329113925.68204-9-aradhya.bhatia@linux.dev


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent e83967c3

drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c

+28 −0
Original line number Diff line number Diff line
@@ -936,6 +936,33 @@ static void cdns_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge, 
	cdns_dsi_hs_init(dsi);

}



static u32 *cdns_dsi_bridge_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)

{

	struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);

	struct cdns_dsi *dsi = input_to_dsi(input);

	struct cdns_dsi_output *output = &dsi->output;

	u32 *input_fmts;



	*num_input_fmts = 0;



	input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL);

	if (!input_fmts)

		return NULL;



	input_fmts[0] = drm_mipi_dsi_get_input_bus_fmt(output->dev->format);

	if (!input_fmts[0])

		return NULL;



	*num_input_fmts = 1;



	return input_fmts;

}



static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {

	.attach = cdns_dsi_bridge_attach,

	.mode_valid = cdns_dsi_bridge_mode_valid,
@@ -946,6 +973,7 @@ static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = { 
	.atomic_reset = drm_atomic_helper_bridge_reset,

	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,

	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,

	.atomic_get_input_bus_fmts = cdns_dsi_bridge_get_input_bus_fmts,

};



static int cdns_dsi_attach(struct mipi_dsi_host *host,