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Commit 0eb2766d authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Andrzej Hajda
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drm/bridge: ti-tfp410: Set the bus_format 



The TFP410 supports 24 bit, single-edge and 12 bit, dual-edge modes.
Depending on how many wires are used (24/12) the driver can set the correct
bus_format.

If the information is not available in DT then assume 24 bit, single-edge
setup.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401124143.17179-3-peter.ujfalusi@ti.com
parent 51c7b447

drivers/gpu/drm/bridge/ti-tfp410.c

+17 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ struct tfp410 { 
	struct drm_connector	connector;

	unsigned int		connector_type;



	u32			bus_format;

	struct i2c_adapter	*ddc;

	struct gpio_desc	*hpd;

	int			hpd_irq;
@@ -139,6 +140,9 @@ static int tfp410_attach(struct drm_bridge *bridge) 
		return ret;

	}



	drm_display_info_set_bus_formats(&dvi->connector.display_info,

					 &dvi->bus_format, 1);



	drm_connector_attach_encoder(&dvi->connector,

					  bridge->encoder);
@@ -197,6 +201,7 @@ static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 
	struct drm_bridge_timings *timings = &dvi->timings;

	struct device_node *ep;

	u32 pclk_sample = 0;

	u32 bus_width = 24;

	s32 deskew = 0;



	/* Start with defaults. */
@@ -221,6 +226,7 @@ static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 


	/* Get the sampling edge from the endpoint. */

	of_property_read_u32(ep, "pclk-sample", &pclk_sample);

	of_property_read_u32(ep, "bus-width", &bus_width);

	of_node_put(ep);



	timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH;
@@ -238,6 +244,17 @@ static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c) 
		return -EINVAL;

	}



	switch (bus_width) {

	case 12:

		dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE;

		break;

	case 24:

		dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24;

		break;

	default:

		return -EINVAL;

	}



	/* Get the setup and hold time from vendor-specific properties. */

	of_property_read_u32(dvi->dev->of_node, "ti,deskew", (u32 *)&deskew);

	if (deskew < -4 || deskew > 3)