[libcamera-devel] [RFC PATCH 4/5] ipa: rpi: cam_helper_imx477: Only pass embedded buffer in parseEmbeddedData()

[Umang Jain]

Only the embedded data section should be passed while parsing the
embedded data through parseEmbeddedData().

Signed-off-by: Umang Jain <umang.jain at ideasonboard.com>
---
 src/ipa/rpi/cam_helper/cam_helper_imx477.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp
index bc769ca7..3753fd0b 100644
--- a/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp
+++ b/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp
@@ -42,6 +42,9 @@ constexpr std::initializer_list<uint32_t> registerList =
 	{ expHiReg, expLoReg, gainHiReg, gainLoReg, frameLengthHiReg, frameLengthLoReg,
 	  lineLengthHiReg, lineLengthLoReg, temperatureReg };
 
+/* No. of lines of embedded data on IMX477. */
+constexpr uint32_t embeddedDataLinesImx477 = 2;
+
 class CamHelperImx477 : public CamHelper
 {
 public:
@@ -95,7 +98,11 @@ void CamHelperImx477::prepare(libcamera::Span<const uint8_t> buffer, Metadata &m
 		return;
 	}
 
-	parseEmbeddedData(buffer, metadata);
+	size_t bytesPerLine = (mode_.width * mode_.bitdepth) >> 3;
+	libcamera::Span<const uint8_t> embeddedData{ buffer.data(),
+						     embeddedDataLinesImx477 * bytesPerLine };
+
+	parseEmbeddedData(embeddedData, metadata);
 
 	/*
 	 * The DeviceStatus struct is first populated with values obtained from
-- 
2.39.1