On Tuesday 27 May 2014 02:04 PM, Tomi Valkeinen wrote:
On 26/05/14 12:28, Archit Taneja wrote:
In omapdss_of_find_source_for_first_ep, we retrieve a source endpoint's DT node,
and then see what omapdss output has the matching device_node pointer in
omap_dss_find_output_by_node.
For all DPI and SDI outputs, the device_node pointer is set as the parent's DSS
device_node pointer. If the source is one of these outputs, the above method
won't work.
To get the correct output for ports within DSS(and in other cases in the future,
where multiple ports might be under one device), we require additional
information which is exclusive to the output port.
We create a new field in omap_dss_device called 'port_num', this provides port
number of the output port corresponding to this device. When searching for the
source endpoint in DT, we extract the 'reg' property from the port corresponding
to the endpoint source. From the list of registered outputs, we pick out that
output which has both dev->of_node and port_num matching with the device_node
pointer and 'reg' of the source endpoint node from DT.
For encoder blocks(the ones which have both an input and output port), we need
to set the port_num as the 'reg' property for the output port as defined in the
DT bindings. We set port_num to 1 in the tfp410 and tpd12s015 encoder drivers.
Signed-off-by: Archit Taneja <arc...@ti.com>
---
.../fbdev/omap2/displays-new/encoder-tfp410.c | 1 +
.../fbdev/omap2/displays-new/encoder-tpd12s015.c | 1 +
drivers/video/fbdev/omap2/dss/dss-of.c | 51 +++++++++++++++++-----
drivers/video/fbdev/omap2/dss/output.c | 8 ++--
include/video/omapdss.h | 7 ++-
5 files changed, 52 insertions(+), 16 deletions(-)
diff --git a/drivers/video/fbdev/omap2/displays-new/encoder-tfp410.c
b/drivers/video/fbdev/omap2/displays-new/encoder-tfp410.c
index b4e9a42..d927455 100644
--- a/drivers/video/fbdev/omap2/displays-new/encoder-tfp410.c
+++ b/drivers/video/fbdev/omap2/displays-new/encoder-tfp410.c
@@ -249,6 +249,7 @@ static int tfp410_probe(struct platform_device *pdev)
dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
dssdev->owner = THIS_MODULE;
dssdev->phy.dpi.data_lines = ddata->data_lines;
+ dssdev->port_num = 1;
r = omapdss_register_output(dssdev);
if (r) {
diff --git a/drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c
b/drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c
index 7e33686..9e25fe7 100644
--- a/drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c
+++ b/drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c
@@ -389,6 +389,7 @@ static int tpd_probe(struct platform_device *pdev)
dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->owner = THIS_MODULE;
+ dssdev->port_num = 1;
in = ddata->in;
diff --git a/drivers/video/fbdev/omap2/dss/dss-of.c
b/drivers/video/fbdev/omap2/dss/dss-of.c
index a4b20aa..8ba43faa 100644
--- a/drivers/video/fbdev/omap2/dss/dss-of.c
+++ b/drivers/video/fbdev/omap2/dss/dss-of.c
@@ -132,28 +132,55 @@ EXPORT_SYMBOL_GPL(omapdss_of_get_first_endpoint);
struct omap_dss_device *
omapdss_of_find_source_for_first_ep(struct device_node *node)
{
- struct device_node *ep;
- struct device_node *src_node;
+ struct device_node *ep, *port_ep;
+ struct device_node *src_node, *src_port;
struct omap_dss_device *src;
+ int r;
+ u32 reg;
ep = omapdss_of_get_first_endpoint(node);
- if (!ep)
- return ERR_PTR(-EINVAL);
+ if (!ep) {
+ r = -EINVAL;
+ goto err_first_ep;
+ }
src_node = omapdss_of_get_remote_device_node(ep);
+ if (!src_node) {
+ r = -EINVAL;
+ goto err_src_node;
+ }
- of_node_put(ep);
-
- if (!src_node)
- return ERR_PTR(-EINVAL);
+ port_ep = of_parse_phandle(ep, "remote-endpoint", 0);
+ if (!port_ep) {
+ r = -EINVAL;
+ goto err_port_ep;
+ }
- src = omap_dss_find_output_by_node(src_node);
+ src_port = of_get_next_parent(port_ep);
+ if (!src_port) {
+ r = -EINVAL;
+ goto err_src_port;
+ }
- of_node_put(src_node);
+ r = of_property_read_u32(src_port, "reg", ®);
+ if (r) {
+ r = 0;
+ reg = 0;
+ }
+ src = omap_dss_find_output_by_node_and_reg(src_node, reg);
if (!src)
- return ERR_PTR(-EPROBE_DEFER);
+ r = -EPROBE_DEFER;
Hmm, maybe the above function, and the helper functions, should be
changed a bit more, so that this function would do:
ep = omapdss_of_get_first_endpoint(node);
src_port = omapdss_of_get_remote_port(ep);
src = omap_dss_find_output_by_port_node(src_port);
src_port will be just on level up(the parent node), the source node will
be still a couple of hops up.
Getting the source node would require us to do some DT related hopping
in omap_dss_find_output_by_port_node(). And it'll also require parsing
of the dss output_list in output.c. I'm worried it'll be a bit messy,
and we might end up adding some DT parsing in output.c
Archit
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