libcamera: Switch PixelFormat to DRM FourCC values

Use DRM FourCC values for the newly defined PixelFormat.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

5 files changed, 31 insertions, 26 deletions

diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index 8d3ad568..1c5fccf6 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -10,6 +10,7 @@
 #include <memory>
 #include <vector>
 
+#include <linux/drm_fourcc.h>
 #include <linux/media-bus-format.h>
 
 #include <libcamera/camera.h>
@@ -249,7 +250,7 @@ IPU3CameraConfiguration::IPU3CameraConfiguration(Camera *camera,
 void IPU3CameraConfiguration::adjustStream(StreamConfiguration &cfg, bool scale)
 {
 	/* The only pixel format the driver supports is NV12. */
-	cfg.pixelFormat = V4L2_PIX_FMT_NV12;
+	cfg.pixelFormat = DRM_FORMAT_NV12;
 
 	if (scale) {
 		/*
@@ -404,7 +405,7 @@ CameraConfiguration *PipelineHandlerIPU3::generateConfiguration(Camera *camera,
 		StreamConfiguration cfg = {};
 		IPU3Stream *stream = nullptr;
 
-		cfg.pixelFormat = V4L2_PIX_FMT_NV12;
+		cfg.pixelFormat = DRM_FORMAT_NV12;
 
 		switch (role) {
 		case StreamRole::StillCapture:
@@ -1121,7 +1122,7 @@ int ImgUDevice::configureOutput(ImgUOutput *output,
 		return 0;
 
 	V4L2DeviceFormat outputFormat = {};
-	outputFormat.fourcc = V4L2_PIX_FMT_NV12;
+	outputFormat.fourcc = dev->toV4L2Fourcc(DRM_FORMAT_NV12);
 	outputFormat.size = cfg.size;
 	outputFormat.planesCount = 2;
 
diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 7a28b03b..b21cf924 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -11,6 +11,7 @@
 #include <memory>
 #include <queue>
 
+#include <linux/drm_fourcc.h>
 #include <linux/media-bus-format.h>
 
 #include <ipa/rkisp1.h>
@@ -434,14 +435,14 @@ RkISP1CameraConfiguration::RkISP1CameraConfiguration(Camera *camera,
 CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 {
 	static const std::array<unsigned int, 8> formats{
-		V4L2_PIX_FMT_YUYV,
-		V4L2_PIX_FMT_YVYU,
-		V4L2_PIX_FMT_VYUY,
-		V4L2_PIX_FMT_NV16,
-		V4L2_PIX_FMT_NV61,
-		V4L2_PIX_FMT_NV21,
-		V4L2_PIX_FMT_NV12,
-		V4L2_PIX_FMT_GREY,
+		DRM_FORMAT_YUYV,
+		DRM_FORMAT_YVYU,
+		DRM_FORMAT_VYUY,
+		DRM_FORMAT_NV16,
+		DRM_FORMAT_NV61,
+		DRM_FORMAT_NV21,
+		DRM_FORMAT_NV12,
+		/* \todo Add support for 8-bit greyscale to DRM formats */
 	};
 
 	const CameraSensor *sensor = data_->sensor_;
@@ -462,7 +463,7 @@ CameraConfiguration::Status RkISP1CameraConfiguration::validate()
 	if (std::find(formats.begin(), formats.end(), cfg.pixelFormat) ==
 	    formats.end()) {
 		LOG(RkISP1, Debug) << "Adjusting format to NV12";
-		cfg.pixelFormat = V4L2_PIX_FMT_NV12;
+		cfg.pixelFormat = DRM_FORMAT_NV12,
 		status = Adjusted;
 	}
 
@@ -541,7 +542,7 @@ CameraConfiguration *PipelineHandlerRkISP1::generateConfiguration(Camera *camera
 		return config;
 
 	StreamConfiguration cfg{};
-	cfg.pixelFormat = V4L2_PIX_FMT_NV12;
+	cfg.pixelFormat = DRM_FORMAT_NV12;
 	cfg.size = data->sensor_->resolution();
 
 	config->addConfiguration(cfg);
@@ -623,7 +624,7 @@ int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 	LOG(RkISP1, Debug) << "ISP output pad configured with " << format.toString();
 
 	V4L2DeviceFormat outputFormat = {};
-	outputFormat.fourcc = cfg.pixelFormat;
+	outputFormat.fourcc = video_->toV4L2Fourcc(cfg.pixelFormat);
 	outputFormat.size = cfg.size;
 	outputFormat.planesCount = 2;
 
@@ -632,7 +633,7 @@ int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 		return ret;
 
 	if (outputFormat.size != cfg.size ||
-	    outputFormat.fourcc != cfg.pixelFormat) {
+	    outputFormat.fourcc != video_->toV4L2Fourcc(cfg.pixelFormat)) {
 		LOG(RkISP1, Error)
 			<< "Unable to configure capture in " << cfg.toString();
 		return -EINVAL;
diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp
index fae0ffc4..45448d6f 100644
--- a/src/libcamera/pipeline/uvcvideo.cpp
+++ b/src/libcamera/pipeline/uvcvideo.cpp
@@ -176,7 +176,7 @@ int PipelineHandlerUVC::configure(Camera *camera, CameraConfiguration *config)
 	int ret;
 
 	V4L2DeviceFormat format = {};
-	format.fourcc = cfg.pixelFormat;
+	format.fourcc = data->video_->toV4L2Fourcc(cfg.pixelFormat);
 	format.size = cfg.size;
 
 	ret = data->video_->setFormat(&format);
@@ -184,7 +184,7 @@ int PipelineHandlerUVC::configure(Camera *camera, CameraConfiguration *config)
 		return ret;
 
 	if (format.size != cfg.size ||
-	    format.fourcc != cfg.pixelFormat)
+	    format.fourcc != data->video_->toV4L2Fourcc(cfg.pixelFormat))
 		return -EINVAL;
 
 	cfg.setStream(&data->stream_);
diff --git a/src/libcamera/pipeline/vimc.cpp b/src/libcamera/pipeline/vimc.cpp
index c16ae4cb..e6ab6a08 100644
--- a/src/libcamera/pipeline/vimc.cpp
+++ b/src/libcamera/pipeline/vimc.cpp
@@ -10,6 +10,7 @@
 #include <iomanip>
 #include <tuple>
 
+#include <linux/drm_fourcc.h>
 #include <linux/media-bus-format.h>
 
 #include <ipa/ipa_interface.h>
@@ -106,9 +107,9 @@ private:
 namespace {
 
 constexpr std::array<unsigned int, 3> pixelformats{
-	V4L2_PIX_FMT_BGR24,
-	V4L2_PIX_FMT_RGB24,
-	V4L2_PIX_FMT_ARGB32,
+	DRM_FORMAT_RGB888,
+	DRM_FORMAT_BGR888,
+	DRM_FORMAT_BGRA8888,
 };
 
 } /* namespace */
@@ -137,7 +138,7 @@ CameraConfiguration::Status VimcCameraConfiguration::validate()
 	if (std::find(pixelformats.begin(), pixelformats.end(), cfg.pixelFormat) ==
 	    pixelformats.end()) {
 		LOG(VIMC, Debug) << "Adjusting format to RGB24";
-		cfg.pixelFormat = V4L2_PIX_FMT_RGB24;
+		cfg.pixelFormat = DRM_FORMAT_BGR888;
 		status = Adjusted;
 	}
 
@@ -186,7 +187,7 @@ CameraConfiguration *PipelineHandlerVimc::generateConfiguration(Camera *camera,
 
 	StreamConfiguration cfg(formats.data());
 
-	cfg.pixelFormat = V4L2_PIX_FMT_RGB24;
+	cfg.pixelFormat = DRM_FORMAT_BGR888;
 	cfg.size = { 1920, 1080 };
 	cfg.bufferCount = 4;
 
@@ -231,7 +232,7 @@ int PipelineHandlerVimc::configure(Camera *camera, CameraConfiguration *config)
 		return ret;
 
 	V4L2DeviceFormat format = {};
-	format.fourcc = cfg.pixelFormat;
+	format.fourcc = data->video_->toV4L2Fourcc(cfg.pixelFormat);
 	format.size = cfg.size;
 
 	ret = data->video_->setFormat(&format);
@@ -239,7 +240,7 @@ int PipelineHandlerVimc::configure(Camera *camera, CameraConfiguration *config)
 		return ret;
 
 	if (format.size != cfg.size ||
-	    format.fourcc != cfg.pixelFormat)
+	    format.fourcc != data->video_->toV4L2Fourcc(cfg.pixelFormat))
 		return -EINVAL;
 
 	/*
diff --git a/src/libcamera/pixelformats.cpp b/src/libcamera/pixelformats.cpp
index 9377fb5e..c0333540 100644
--- a/src/libcamera/pixelformats.cpp
+++ b/src/libcamera/pixelformats.cpp
@@ -19,8 +19,10 @@ namespace libcamera {
  * \brief libcamera image pixel format
  *
  * The PixelFormat type describes the format of images in the public libcamera
- * API. It stores a FourCC value in a 32-bit unsigned integer. The values are
- * defined in the Linux kernel V4L2 API (see linux/videodev2.h).
+ * API. It stores a FourCC value as a 32-bit unsigned integer. The values are
+ * defined in the Linux kernel DRM/KMS API (see linux/drm_fourcc.h).
+ *
+ * \todo Add support for format modifiers
  */
 
 } /* namespace libcamera */