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| author | Anatolij Gustschin <agust@denx.de> | 2010-08-18 11:25:20 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-10-12 21:05:58 +0200 |
| commit | beca5a5f5bf0d88125580e5e9c1730469cd50ab8 (patch) | |
| tree | 95d523b76c1423415fba50d3bce1ff3dcd7ff352 /common/fdt_support.c | |
| parent | c000808b6aa08dc7f3137055866e6dcc3f7f8cdc (diff) | |
| download | u-boot-imx-beca5a5f5bf0d88125580e5e9c1730469cd50ab8.zip u-boot-imx-beca5a5f5bf0d88125580e5e9c1730469cd50ab8.tar.gz u-boot-imx-beca5a5f5bf0d88125580e5e9c1730469cd50ab8.tar.bz2 | |
fdt_support: support adding EDID property to FDT display nodes
Boards can pass display timing info for drivers using EDID
block. Provide common function to add board specific EDID
data to the device tree. Subsequent patch makes use of this
functionality.
Detailed timing descriptor data from EDID is used for
programming the display controller. This is currently
implemented on the Linux side by the fsl-diu-fb frame
buffer driver and it is documented there in
Documentation/powerpc/dts-bindings/fsl/diu.txt.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Cc: Gerald Van Baren <vanbaren@cideas.com>
Diffstat (limited to 'common/fdt_support.c')
| -rw-r--r-- | common/fdt_support.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 0ed6e77..9b65a8a 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -1189,3 +1189,32 @@ int fdt_alloc_phandle(void *blob) return phandle + 1; } + +#if defined(CONFIG_VIDEO) +int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) +{ + int noff; + int ret; + + noff = fdt_node_offset_by_compatible(blob, -1, compat); + if (noff != -FDT_ERR_NOTFOUND) { + debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); +add_edid: + ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); + if (ret == -FDT_ERR_NOSPACE) { + ret = fdt_increase_size(blob, 512); + if (!ret) + goto add_edid; + else + goto err_size; + } else if (ret < 0) { + printf("Can't add property: %s\n", fdt_strerror(ret)); + return ret; + } + } + return 0; +err_size: + printf("Can't increase blob size: %s\n", fdt_strerror(ret)); + return ret; +} +#endif |