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, 16 insertions, 1 deletions

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 09ede7fa198..faa91441a6b 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -774,8 +774,9 @@ static void hdmi_put_clocks(void)
 /* HDMI HW IP initialisation */
 static int __init omapdss_hdmihw_probe(struct platform_device *pdev)
 {
+	struct omap_dss_board_info *pdata = pdev->dev.platform_data;
 	struct resource *hdmi_mem;
-	int r;
+	int r, i;
 
 	hdmi.pdev = pdev;
 
@@ -812,6 +813,18 @@ static int __init omapdss_hdmihw_probe(struct platform_device *pdev)
 
 	dss_debugfs_create_file("hdmi", hdmi_dump_regs);
 
+	for (i = 0; i < pdata->num_devices; ++i) {
+		struct omap_dss_device *dssdev = pdata->devices[i];
+
+		if (dssdev->type != OMAP_DISPLAY_TYPE_HDMI)
+			continue;
+
+		r = omap_dss_register_device(dssdev, &pdev->dev, i);
+		if (r)
+			DSSERR("device %s register failed: %d\n",
+					dssdev->name, r);
+	}
+
 #if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \
 	defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE)
 
@@ -828,6 +841,8 @@ static int __init omapdss_hdmihw_probe(struct platform_device *pdev)
 
 static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
 {
+	omap_dss_unregister_child_devices(&pdev->dev);
+
 	hdmi_panel_exit();
 
 #if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \