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[v4,09/14] asm-generic: unaligned: add get_unaligned_le24()

Message ID 20260902-add-genio-510-and-genio-700-hdmi-v4-9-7c3b4f068a56@baylibre.com
State New
Delegated to: David Lechner
Headers show
Series mediatek: add HDMI pipeline support for MT8188 based boards | expand

Commit Message

Julien Stephan Sept. 2, 2026, 2:15 p.m. UTC 
Add get_unaligned_le24(), mirroring the helper of the same name in
Linux, to read a 24-bit little-endian value from a possibly unaligned
buffer. The MediaTek HDMI driver uses it to pack InfoFrame bytes into
the 24-bit little-endian controller register fields.

Signed-off-by: Julien Stephan <jstephan@baylibre.com>
---
 include/asm-generic/unaligned.h | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index 9e5d93ec304..8a181ba6682 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -32,6 +32,13 @@  static inline u64 get_unaligned_le64(const void *p)
 	return le64_to_cpu(__get_unaligned_t(__le64, p));
 }
 
+static inline u32 get_unaligned_le24(const void *p)
+{
+	const u8 *_p = p;
+
+	return _p[0] | _p[1] << 8 | _p[2] << 16;
+}
+
 static inline void put_unaligned_le16(u16 val, void *p)
 {
 	__put_unaligned_t(__le16, cpu_to_le16(val), p);