pipeline: ipa: raspberrypi: Refactor and move the Raspberry Pi code

Split the Raspberry Pi pipeline handler and IPA source code into common
and VC4/BCM2835 specific file structures.

For the pipeline handler, the common code files now live in
src/libcamera/pipeline/rpi/common/
and the VC4-specific files in src/libcamera/pipeline/rpi/vc4/.

For the IPA, the common code files now live in
src/ipa/rpi/{cam_helper,controller}/
and the vc4 specific files in src/ipa/rpi/vc4/. With this change, the
camera tuning files are now installed under share/libcamera/ipa/rpi/vc4/.

To build the pipeline and IPA, the meson configuration options have now
changed from "raspberrypi" to "rpi/vc4":

meson setup build -Dipas=rpi/vc4 -Dpipelines=rpi/vc4

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 0 insertions, 149 deletions

diff --git a/src/ipa/raspberrypi/md_parser_smia.cpp b/src/ipa/raspberrypi/md_parser_smia.cpp
deleted file mode 100644
index 210787ed..00000000
--- a/src/ipa/raspberrypi/md_parser_smia.cpp
+++ /dev/null
@@ -1,149 +0,0 @@
-/* SPDX-License-Identifier: BSD-2-Clause */
-/*
- * Copyright (C) 2019-2021, Raspberry Pi Ltd
- *
- * md_parser_smia.cpp - SMIA specification based embedded data parser
- */
-
-#include <libcamera/base/log.h>
-#include "md_parser.h"
-
-using namespace RPiController;
-using namespace libcamera;
-
-/*
- * This function goes through the embedded data to find the offsets (not
- * values!), in the data block, where the values of the given registers can
- * subsequently be found.
- *
- * Embedded data tag bytes, from Sony IMX219 datasheet but general to all SMIA
- * sensors, I think.
- */
-
-constexpr unsigned int LineStart = 0x0a;
-constexpr unsigned int LineEndTag = 0x07;
-constexpr unsigned int RegHiBits = 0xaa;
-constexpr unsigned int RegLowBits = 0xa5;
-constexpr unsigned int RegValue = 0x5a;
-constexpr unsigned int RegSkip = 0x55;
-
-MdParserSmia::MdParserSmia(std::initializer_list<uint32_t> registerList)
-{
-	for (auto r : registerList)
-		offsets_[r] = {};
-}
-
-MdParser::Status MdParserSmia::parse(libcamera::Span<const uint8_t> buffer,
-				     RegisterMap &registers)
-{
-	if (reset_) {
-		/*
-		 * Search again through the metadata for all the registers
-		 * requested.
-		 */
-		ASSERT(bitsPerPixel_);
-
-		for (const auto &kv : offsets_)
-			offsets_[kv.first] = {};
-
-		ParseStatus ret = findRegs(buffer);
-		/*
-		 * > 0 means "worked partially but parse again next time",
-		 * < 0 means "hard error".
-		 *
-		 * In either case, we retry parsing on the next frame.
-		 */
-		if (ret != ParseOk)
-			return ERROR;
-
-		reset_ = false;
-	}
-
-	/* Populate the register values requested. */
-	registers.clear();
-	for (const auto &[reg, offset] : offsets_) {
-		if (!offset) {
-			reset_ = true;
-			return NOTFOUND;
-		}
-		registers[reg] = buffer[offset.value()];
-	}
-
-	return OK;
-}
-
-MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t> buffer)
-{
-	ASSERT(offsets_.size());
-
-	if (buffer[0] != LineStart)
-		return NoLineStart;
-
-	unsigned int currentOffset = 1; /* after the LineStart */
-	unsigned int currentLineStart = 0, currentLine = 0;
-	unsigned int regNum = 0, regsDone = 0;
-
-	while (1) {
-		int tag = buffer[currentOffset++];
-
-		if ((bitsPerPixel_ == 10 &&
-		     (currentOffset + 1 - currentLineStart) % 5 == 0) ||
-		    (bitsPerPixel_ == 12 &&
-		     (currentOffset + 1 - currentLineStart) % 3 == 0)) {
-			if (buffer[currentOffset++] != RegSkip)
-				return BadDummy;
-		}
-
-		int dataByte = buffer[currentOffset++];
-
-		if (tag == LineEndTag) {
-			if (dataByte != LineEndTag)
-				return BadLineEnd;
-
-			if (numLines_ && ++currentLine == numLines_)
-				return MissingRegs;
-
-			if (lineLengthBytes_) {
-				currentOffset = currentLineStart + lineLengthBytes_;
-
-				/* Require whole line to be in the buffer (if buffer size set). */
-				if (buffer.size() &&
-				    currentOffset + lineLengthBytes_ > buffer.size())
-					return MissingRegs;
-
-				if (buffer[currentOffset] != LineStart)
-					return NoLineStart;
-			} else {
-				/* allow a zero line length to mean "hunt for the next line" */
-				while (currentOffset < buffer.size() &&
-				       buffer[currentOffset] != LineStart)
-					currentOffset++;
-
-				if (currentOffset == buffer.size())
-					return NoLineStart;
-			}
-
-			/* inc currentOffset to after LineStart */
-			currentLineStart = currentOffset++;
-		} else {
-			if (tag == RegHiBits)
-				regNum = (regNum & 0xff) | (dataByte << 8);
-			else if (tag == RegLowBits)
-				regNum = (regNum & 0xff00) | dataByte;
-			else if (tag == RegSkip)
-				regNum++;
-			else if (tag == RegValue) {
-				auto reg = offsets_.find(regNum);
-
-				if (reg != offsets_.end()) {
-					offsets_[regNum] = currentOffset - 1;
-
-					if (++regsDone == offsets_.size())
-						return ParseOk;
-				}
-				regNum++;
-			} else
-				return IllegalTag;
-		}
-	}
-}