Re: [PATCH 4/7] lib/vsprintf: Add support for generic FOURCCs by extending %p4cc
From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Date: 2022-09-06 22:11:32
Also in:
asahi, linux-arm-kernel, linux-doc, linux-gpio
On 06/09/2022 15.19, Russell King (Oracle) wrote:
From: Hector Martin <redacted> %p4cc is designed for DRM/V4L2 FOURCCs with their specific quirks, but it's useful to be able to print generic 4-character codes formatted as an integer. Extend it to add format specifiers for printing generic 32-bit FOURCCs with various endian semantics:
Documentation/core-api/printk-formats.rst | 32 +++++++++++++++++++++ lib/vsprintf.c | 35 +++++++++++++++++++---- 2 files changed, 61 insertions(+), 6 deletions(-)
Please also update lib/test_printf.c with a few test cases when modifying/extending vsnprintf().
quoted hunk ↗ jump to hunk
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 5e89497ba314..22c33398ec02 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst@@ -625,6 +625,38 @@ Passed by reference. %p4cc Y10 little-endian (0x20303159) %p4cc NV12 big-endian (0xb231564e) +Generic FourCC code +------------------- + +:: + %p4c[hnbl] gP00 (0x67503030) +
Typo, I think. hrbl ? Rasmus