OMAPDSS: interface drivers register their panel devices

Currently the higher level omapdss platform driver gets the list of
displays in its platform data, and uses that list to create the
omap_dss_device for each display.

With DT, the logical way to do the above is to list the displays under
each individual output, i.e. we'd have "dpi" node, under which we would
have the display that uses DPI. In other words, each output driver
handles the displays that use that particular output.

To make the current code ready for DT, this patch modifies the output
drivers so that each of them creates the display devices which use that
output. However, instead of changing the platform data to suit this
method, each output driver is passed the full list of displays, and the
drivers pick the displays that are meant for them. This allows us to
keep the old platform data, and thus we avoid the need to change the
board files.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index ddea71ea2a0..78b962308a0 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -4614,6 +4614,7 @@ static int __init omap_dsihw_probe(struct platform_device *dsidev)
 	int r, i, dsi_module = dsi_get_dsidev_id(dsidev);
 	struct resource *dsi_mem;
 	struct dsi_data *dsi;
+	struct omap_dss_board_info *pdata = dsidev->dev.platform_data;
 
 	dsi = devm_kzalloc(&dsidev->dev, sizeof(*dsi), GFP_KERNEL);
 	if (!dsi)
@@ -4700,6 +4701,21 @@ static int __init omap_dsihw_probe(struct platform_device *dsidev)
 	else
 		dsi->num_lanes_supported = 3;
 
+	for (i = 0; i < pdata->num_devices; ++i) {
+		struct omap_dss_device *dssdev = pdata->devices[i];
+
+		if (dssdev->type != OMAP_DISPLAY_TYPE_DSI)
+			continue;
+
+		if (dssdev->phy.dsi.module != dsi_module)
+			continue;
+
+		r = omap_dss_register_device(dssdev, &dsidev->dev, i);
+		if (r)
+			DSSERR("device %s register failed: %d\n",
+				dssdev->name, r);
+	}
+
 	dsi_runtime_put(dsidev);
 
 	if (dsi_module == 0)
@@ -4727,6 +4743,8 @@ static int __exit omap_dsihw_remove(struct platform_device *dsidev)
 
 	WARN_ON(dsi->scp_clk_refcount > 0);
 
+	omap_dss_unregister_child_devices(&dsidev->dev);
+
 	pm_runtime_disable(&dsidev->dev);
 
 	dsi_put_clocks(dsidev);