OMAPDSS: DPI: Add support for multiple instances

Register DPI outputs, and assign the port_num to them as specified by the
'reg' property in the DPI ports in DT.

To support multiple DPI instances, dpi_get_channel needs to take the DPI
instance's port number to get the corresponding channel. Make it take this
argument. We just pass 0 in the non-DT path, since we don't support multiple
instances in the non-DT case.

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

1 files changed, 23 insertions, 3 deletions

diff --git a/drivers/video/fbdev/omap2/dss/dpi.c b/drivers/video/fbdev/omap2/dss/dpi.c
index 224d7885eeeb..03376354b360 100644
--- a/drivers/video/fbdev/omap2/dss/dpi.c
+++ b/drivers/video/fbdev/omap2/dss/dpi.c
@@ -616,7 +616,7 @@ static void dpi_init_pll(struct dpi_data *dpi)
  * the channel in some more dynamic manner, or get the channel as a user
  * parameter.
  */
-static enum omap_channel dpi_get_channel(void)
+static enum omap_channel dpi_get_channel(int port_num)
 {
         switch (omapdss_get_version()) {
         case OMAPDSS_VER_OMAP24xx:
@@ -710,7 +710,7 @@ static void dpi_init_output(struct platform_device *pdev)
         out->id = OMAP_DSS_OUTPUT_DPI;
         out->output_type = OMAP_DISPLAY_TYPE_DPI;
         out->name = "dpi.0";
-        out->dispc_channel = dpi_get_channel();
+        out->dispc_channel = dpi_get_channel(0);
         out->ops.dpi = &dpi_ops;
         out->owner = THIS_MODULE;
 
@@ -730,11 +730,31 @@ static void dpi_init_output_port(struct platform_device *pdev,
 {
         struct dpi_data *dpi = port->data;
         struct omap_dss_device *out = &dpi->output;
+        int r;
+        u32 port_num;
+
+        r = of_property_read_u32(port, "reg", &port_num);
+        if (r)
+                port_num = 0;
+
+        switch (port_num) {
+        case 2:
+                out->name = "dpi.2";
+                break;
+        case 1:
+                out->name = "dpi.1";
+                break;
+        case 0:
+        default:
+                out->name = "dpi.0";
+                break;
+        }
 
         out->dev = &pdev->dev;
         out->id = OMAP_DSS_OUTPUT_DPI;
         out->output_type = OMAP_DISPLAY_TYPE_DPI;
-        out->dispc_channel = dpi_get_channel();
+        out->dispc_channel = dpi_get_channel(port_num);
+        out->port_num = port_num;
         out->ops.dpi = &dpi_ops;
         out->owner = THIS_MODULE;