drivers: core: ofnode: Add panel timing decode.
ofnode_decode_display_timing supports reading timing parameters from
subnode of display-timings node, for displays supporting multiple
resolution, in case if a display supports single resolution, it fails
reading directly from display-timings node, to support it
ofnode_decode_panel_timing is added.
Signed-off-by: Nikhil M Jain <n-jain1@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 4d56b1a..d08578e 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -991,6 +991,53 @@
return ret;
}
+int ofnode_decode_panel_timing(ofnode parent,
+ struct display_timing *dt)
+{
+ ofnode timings;
+ u32 val = 0;
+ int ret = 0;
+
+ timings = ofnode_find_subnode(parent, "panel-timings");
+ if (!ofnode_valid(timings))
+ return -EINVAL;
+ memset(dt, 0, sizeof(*dt));
+ ret |= decode_timing_property(timings, "hback-porch", &dt->hback_porch);
+ ret |= decode_timing_property(timings, "hfront-porch", &dt->hfront_porch);
+ ret |= decode_timing_property(timings, "hactive", &dt->hactive);
+ ret |= decode_timing_property(timings, "hsync-len", &dt->hsync_len);
+ ret |= decode_timing_property(timings, "vback-porch", &dt->vback_porch);
+ ret |= decode_timing_property(timings, "vfront-porch", &dt->vfront_porch);
+ ret |= decode_timing_property(timings, "vactive", &dt->vactive);
+ ret |= decode_timing_property(timings, "vsync-len", &dt->vsync_len);
+ ret |= decode_timing_property(timings, "clock-frequency", &dt->pixelclock);
+ dt->flags = 0;
+ if (!ofnode_read_u32(timings, "vsync-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
+ DISPLAY_FLAGS_VSYNC_LOW;
+ }
+ if (!ofnode_read_u32(timings, "hsync-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
+ DISPLAY_FLAGS_HSYNC_LOW;
+ }
+ if (!ofnode_read_u32(timings, "de-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
+ DISPLAY_FLAGS_DE_LOW;
+ }
+ if (!ofnode_read_u32(timings, "pixelclk-active", &val)) {
+ dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
+ DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+ }
+ if (ofnode_read_bool(timings, "interlaced"))
+ dt->flags |= DISPLAY_FLAGS_INTERLACED;
+ if (ofnode_read_bool(timings, "doublescan"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
+ if (ofnode_read_bool(timings, "doubleclk"))
+ dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
+
+ return ret;
+}
+
const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
{
if (ofnode_is_np(node))
diff --git a/drivers/core/read.c b/drivers/core/read.c
index 3e5fea8..e0543bb 100644
--- a/drivers/core/read.c
+++ b/drivers/core/read.c
@@ -420,6 +420,12 @@
return ofnode_decode_display_timing(dev_ofnode(dev), index, config);
}
+int dev_decode_panel_timing(const struct udevice *dev,
+ struct display_timing *config)
+{
+ return ofnode_decode_panel_timing(dev_ofnode(dev), config);
+}
+
ofnode dev_get_phy_node(const struct udevice *dev)
{
return ofnode_get_phy_node(dev_ofnode(dev));