From af612e43de6d27df51a7636229be7d33fe3ab7b5 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Tue, 16 Feb 2021 17:57:20 +0200 Subject: lib/vsprintf: Add support for printing V4L2 and DRM fourccs Add a printk modifier %p4cc (for pixel format) for printing V4L2 and DRM pixel formats denoted by fourccs. The fourcc encoding is the same for both so the same implementation can be used. Suggested-by: Mauro Carvalho Chehab Signed-off-by: Sakari Ailus Reviewed-by: Petr Mladek Reviewed-by: Sergey Senozhatsky Reviewed-by: Andy Shevchenko Signed-off-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20210216155723.17109-2-sakari.ailus@linux.intel.com --- lib/test_printf.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'lib/test_printf.c') diff --git a/lib/test_printf.c b/lib/test_printf.c index 7ac87f18a10f..7ee0b4e17b21 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -649,6 +649,23 @@ static void __init fwnode_pointer(void) software_node_unregister(&softnodes[0]); } +static void __init fourcc_pointer(void) +{ + struct { + u32 code; + char *str; + } const try[] = { + { 0x3231564e, "NV12 little-endian (0x3231564e)", }, + { 0xb231564e, "NV12 big-endian (0xb231564e)", }, + { 0x10111213, ".... little-endian (0x10111213)", }, + { 0x20303159, "Y10 little-endian (0x20303159)", }, + }; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(try); i++) + test(try[i].str, "%p4cc", &try[i].code); +} + static void __init errptr(void) { @@ -694,6 +711,7 @@ test_pointer(void) flags(); errptr(); fwnode_pointer(); + fourcc_pointer(); } static void __init selftest(void) -- cgit