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drm/imx: parallel-display: fix drm_panel support

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The parallel-display driver used an undocumented, non-standard property
"fsl,panel" to optionally associate with a drm_panel device. This patch
fixes the driver to use the same OF graph bindings as the LDB driver
instead:

    parallel-display {
            compatible = "fsl,imx-parallel-display";
            ...

            port@1 {
                    reg = <1>;

                    parallel_out: endpoint {
                            remote_endpoint = <&panel_in>;
                    };
            };
    };

    panel {
            ...

            port {
                    panel_in: endpoint {
                            remote-endpoint = <&parallel_out>;
                    };
            };
    };

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Gary Bisson <gary.bisson@boundarydevices.com>
This commit is contained in:
Philipp Zabel
2015-05-19 16:28:12 +02:00
parent d770e558e2
commit 553a59fc8f
2 changed files with 39 additions and 8 deletions
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21
drivers/gpu/drm/imx/parallel-display.c
View File

@@ -21,6 +21,7 @@
#include <drm/drm_panel.h>
#include <linux/videodev2.h>
#include <video/of_display_timing.h>
#include <linux/of_graph.h>
#include "imx-drm.h"
@@ -208,7 +209,7 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
struct device_node *panel_node;
struct device_node *port;
const u8 *edidp;
struct imx_parallel_display *imxpd;
int ret;
@@ -234,11 +235,19 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
}
panel_node = of_parse_phandle(np, "fsl,panel", 0);
if (panel_node) {
imxpd->panel = of_drm_find_panel(panel_node);
if (!imxpd->panel)
return -EPROBE_DEFER;
/* port@1 is the output port */
port = of_graph_get_port_by_id(np, 1);
if (port) {
struct device_node *endpoint, *remote;
endpoint = of_get_child_by_name(port, "endpoint");
if (endpoint) {
remote = of_graph_get_remote_port_parent(endpoint);
if (remote)
imxpd->panel = of_drm_find_panel(remote);
if (!imxpd->panel)
return -EPROBE_DEFER;
}
}
imxpd->dev = dev;