[PATCH v2] libcamera: rkisp1: Clamp stream configuration to ISP limit on raw path

[Umang Jain]

Commit 761545407c76 ("pipeline: rkisp1: Filter out sensor sizes not
supported by the pipeline") introduced a mechanism to determine maximum
supported sensor resolution and filter out resolutions that cannot be
supported by the ISP.

However, it missed to update the raw stream configuration path, where
it should have clamped the raw stream configuration size to the maximum
sensor supported resolution.

This patch fixes the above issue and can be confirmed with IMX283
on i.MX8MP:

From:
($) cam -c1 -srole=raw,width=5472,height=3072
INFO Camera camera.cpp:1197 configuring streams: (0) 5472x3648-SRGGB12
ERROR RkISP1 rkisp1_path.cpp:425 Unable to configure capture in 5472x3648-SRGGB12
Failed to configure camera
Failed to start camera session

To:
($) cam -c1 -srole=raw,width=5472,height=3072
INFO Camera camera.cpp:1197 configuring streams: (0) 4096x3072-SRGGB12
cam0: Capture until user interrupts by SIGINT
536.082380 (0.00 fps) cam0-stream0 seq: 000000 bytesused: 25165824
536.182378 (10.00 fps) cam0-stream0 seq: 000001 bytesused: 25165824
536.282375 (10.00 fps) cam0-stream0 seq: 000002 bytesused: 25165824
...

Fixes: 761545407c76 ("pipeline: rkisp1: Filter out sensor sizes not supported by the pipeline")
Signed-off-by: Umang Jain <umang.jain at ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi at ideasonboard.com>
---
Changes in v2:
- Extend the comment on what 'resolution' var is and denote that
  sensor->getFormat() will never return something greter than
 'resolution'
---
 src/libcamera/pipeline/rkisp1/rkisp1_path.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
index 3b5bea96..1999094e 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1_path.cpp
@@ -326,9 +326,15 @@ RkISP1Path::validate(const CameraSensor *sensor,
 	if (isRaw) {
 		/*
 		 * Use the sensor output size closest to the requested stream
-		 * size.
+		 * size while ensuring the output size doesn't exceed ISP limits.
+		 *
+		 * As 'resolution' is the largest sensor resolution
+		 * supported by the ISP, CameraSensor::getFormat() will never
+		 * return a V4L2SubdeviceFormat with a larger size.
 		 */
 		uint32_t mbusCode = formatToMediaBus.at(cfg->pixelFormat);
+		cfg->size.boundTo(resolution);
+
 		Size rawSize = sensorConfig ? sensorConfig->outputSize
 					    : cfg->size;
 
-- 
2.45.2