Commit d284ccd8 authored by Wadim Egorov's avatar Wadim Egorov Committed by Neil Armstrong
Browse files

drm/bridge: sii902x: Set input bus format based on bus-width 



Introduce a bus-width property to define the number of parallel RGB
input pins connected to the transmitter. The input bus formats are updated
accordingly. If the property is not specified, default to 24-bit bus-width.

Signed-off-by: default avatarWadim Egorov <w.egorov@phytec.de>
Reviewed-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241017085556.3045686-3-w.egorov@phytec.de


Signed-off-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241017085556.3045686-3-w.egorov@phytec.de
parent 096d518c

drivers/gpu/drm/bridge/sii902x.c

+23 −1
Original line number Diff line number Diff line
@@ -180,6 +180,8 @@ struct sii902x { 
	struct gpio_desc *reset_gpio;

	struct i2c_mux_core *i2cmux;

	bool sink_is_hdmi;

	u32 bus_width;



	/*

	 * Mutex protects audio and video functions from interfering

	 * each other, by keeping their i2c command sequences atomic.
@@ -477,6 +479,8 @@ static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 
						     u32 output_fmt,

						     unsigned int *num_input_fmts)

{



	struct sii902x *sii902x = bridge_to_sii902x(bridge);

	u32 *input_fmts;



	*num_input_fmts = 0;
@@ -485,7 +489,20 @@ static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, 
	if (!input_fmts)

		return NULL;



	switch (sii902x->bus_width) {

	case 16:

		input_fmts[0] = MEDIA_BUS_FMT_RGB565_1X16;

		break;

	case 18:

		input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X18;

		break;

	case 24:

		input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;

		break;

	default:

		return NULL;

	}



	*num_input_fmts = 1;



	return input_fmts;
@@ -1167,6 +1184,11 @@ static int sii902x_probe(struct i2c_client *client) 
		return PTR_ERR(sii902x->reset_gpio);

	}



	sii902x->bus_width = 24;

	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);

	if (endpoint)

		of_property_read_u32(endpoint, "bus-width", &sii902x->bus_width);



	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);

	if (endpoint) {

		struct device_node *remote = of_graph_get_remote_port_parent(endpoint);